AB18x5 Series Datasheet by Abracon LLC

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ABRACON“ RoHS CORPORATION Complla nl - ESD Sensitive m rum 41f! mhng awn"
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 1 of 37 Abracon Drawing #453568 Revision: C
Features
Ultra-low supply current (all at 3V):
- 14 nA with RC oscillator
- 22 nA with RC oscillator and Autocalibration
- 55 nA with crystal oscillator
Baseline timekeeping features:
- 32.768 kHz crystal oscillator with integrated
load capacitor/resistor
- Counters for hundredths, seconds, minutes,
hours, date, month, year, century, and week-
day
- Alarm capability on all counters
- Programmable output clock generation
(32.768 kHz to 1 year)
- Countdown timer with repeat function
- Automatic leap year calculation
Advanced timekeeping features:
- Integrated power optimized RC oscillator
- Advanced crystal calibration to ± 2 ppm
- Advanced RC calibration to ± 16 ppm
- Automatic calibration of RC oscillator to crystal
oscillator
- Watchdog timer with hardware reset
- 256 bytes of general purpose RAM
Power management features:
- Integrated ~1 power switch for off-chip com-
ponents such as a host MCU
- System sleep manager for managing host pro-
cessor wake/sleep states
- External reset signal monitor
- Reset output generator
- Supercapacitor trickle charger with program-
mable charging current
- Automatic switchover to VBAT
- External interrupt monitor
- Programmable low battery detection threshold
- Programmable analog voltage comparator
•I
2C (up to 400 kHz) and 3-wire or 4-wire SPI (up
to 2 MHz) serial interfaces available
Operating voltage 1.5-3.6 V
Clock and RAM retention voltage 1.5-3.6 V
Operating temperature –40 to 85 °C
All inputs include Schmitt Triggers
3x3 mm QFN-16 package
Applications
Smart cards
Wireless sensors and tags
Medical electronics
Utility meters
Data loggers
• Appliances
• Handsets
Consumer electronics
Communications equipment
Description
The ABRACON AB18X5 Real-Time Clock with
Power Management family provides a
groundbreaking combination of ultra-low power
coupled with a highly sophisticated feature set. With
power requirements significantly lower than any
other industry RTC (as low as 14 nA), these are the
first semiconductors based on innovative SPOTTM
(Subthreshold Power Optimized Technology) CMOS
platform. The AB18X5 includes on-chip oscillators to
provide minimum power consumption, full RTC
functions including battery backup and
programmable counters and alarms for timer and
watchdog functions, and either an I2C or SPI serial
interface for communication with a host controller. An
integrated power switch and a sophisticated system
sleep manager with counter, timer, alarm, and
interrupt capabilities allows the AB18X5 to be used
as a supervisory component in a host microcontroller
based system.
Disclaimer: AB18X5 series of devices are
based on innovative SPOT technology,
proprietary to Ambiq Micro.
ABRACON" RoHS CORPORATION Compllanl - ESD Sensitive m- ['40er 41“ MA.“ [Wm
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 2 of 37 Abracon Drawing #453568 Revision: C
1. Family Summary
The AB18X5 family consists of several members (see Table 1). All devices are supplied in a standard 3x3
mm QFN-16 package. Members of the software and pin compatible AB08X5 RTC family are also listed.
Table 1: Family Summary
Part #
Baseline
Timekeeping Advanced Timekeeping Power Management
Interface
XT
Osc
Number
of GP
Outputs
RC
Osc
Calib/
Auto-
calib
Watch-
dog
RAM
(B)
VBAT
Switch
Reset
Mgmt
Ext
Int
Power
Switch and
Sleep FSM
AB1805 4■■ ■256 ■■■■ I2C
AB1815 3■■ ■256 ■■■■ SPI
Software and Pin Compatible AB08X5 Family Components
AB0805 3■■ ■256 ■■ I2C
AB0815 2■■ ■256 ■■ SPI
ABRACON" RoHS CORPORATION Compllanl - ESD Sensitive nr- law, an M.“ mm”
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 3 of 37 Abracon Drawing #453568 Revision: C
2. Functional Description
Figure 1 illustrates the AB18X5 functional design.
Figure 1. Detailed Block Diagram
AB18X5 serves as a companion part for host processors including microcontrollers, radios, and digital
signal processors. It tracks time as in a typical RTC product and additionally provides unique power
management functionality that makes it ideal for highly energy-constrained applications. To support such
operation, the AB18X5 includes 3 distinct feature groups: 1) baseline timekeeping features, 2) advanced
timekeeping features, and 3) power management features. Functions from each feature group may be
controlled via I/O offset mapped registers. These registers are accessed using either an I2C serial interface
(e.g., in the AB1805) or a SPI serial interface (e.g., in the AB1815). Each feature group is described briefly
below and in greater detail in subsequent sections.
The baseline timekeeping feature group supports the standard 32.786 kHz crystal (XT) oscillation mode for
maximum frequency accuracy with an ultra-low current draw of 55 nA. The baseline timekeeping feature
group also includes a standard set of counters monitoring hundredths of a second up through centuries. A
XT Osc
RC Osc
Divider
Seconds
Minutes
Hours
Days
Weekdays
Months
Years
Power
Control
VCC VBAT
I2C/SPI
Interface
SCL
SDA/O
Control
Alarms
Int/Clock
FOUT/nIRQ
PSW/nIRQ2
VSS
CLKOUT/nIRQ3
SDI
nCE
WDI
Reset
nEXTR
nRST
RAM
XO
XI
nTIRQ
Timer
WDT
100ths
Divider
Calibration Engine
EXTI
Analog
Compare
h- "mm/1 mink mm." Anmcon‘ CORPORATION RoHS Compua m - ESD Sensitive
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 4 of 37 Abracon Drawing #453568 Revision: C
complement of countdown timers and alarms may additionally be set to initiate interrupts or resets on
several of the outputs.
The advanced timekeeping feature group supports two additional oscillation modes: 1) RC oscillator mode,
and 2) Autocalibration mode. At only 14 nA, the temperature-compensated RC oscillator mode provides an
even lower current draw than the XT oscillator for applications with reduced frequency accuracy
requirements. A proprietary calibration algorithm allows the AB18X5 to digitally tune the RC oscillator
frequency and the XT oscillator frequency with accuracy as low as 2 ppm at a given temperature. In
Autocalibration mode, the RC oscillator is used as the primary oscillation source and is periodically
calibrated against the XT oscillator. Autocalibration may be done automatically every 8.5 minutes or 17
minutes and may also be initiated via software. This mode enables average current draw of only 22 nA
with frequency accuracy similar to the XT oscillator. The advanced timekeeping feature group also
includes a rich set of input and output configuration options that enables the monitoring of external
interrupts (e.g., pushbutton signals), the generation of clock outputs, and watchdog timer functionality.
Power management features built into the AB18X5 enable it to operate as a backup device in both line-
powered and battery-powered systems. An integrated power control module automatically detects when
main power (VCC) falls below a threshold and switches to backup power (VBAT). 256B of ultra-low
leakage RAM enable the storage of key parameters when operating on backup power.
The AB18X5 is the first RTC to incorporate a number of more advanced power management features. In
particular, the AB18X5 includes a finite state machine (integrated with the Power Control block in Figure 1)
that can control a host processor as it transitions between sleep/reset states and active states. Digital
outputs can be configured to control the reset signal or interrupt input of the host controller. The AB18X5
additionally integrates a power switch with ~1 impedance that can be used to cut off ground current on
the host microcontroller and reduce sleep current to <1 nA. The AB18X5 parts can wake up a sleeping
system using internally generated timing interrupts or externally generated interrupts generated by digital
inputs (e.g., using a pushbutton) or an analog comparator. The aforementioned functionality enables users
to seamlessly power down host processors, leaving only the energy-efficient AB18X5 chip awake. The
AB18X5 also includes voltage detection on the backup power supply.
ABRACON“ RoHS g “MMCOKI’OMTION Complla nl - ESD Sensitive he mm 41/! mhn WE
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 5 of 37 Abracon Drawing #453568 Revision: C
3. AB18X5 Application Examples
The AB18X5 enables a variety of system implementations in which the AB18X5 can control power usage
by other elements in the system. This is typically used when the entire system is powered from a battery
and minimizing total power usage is critical. The backup RAM in the AB18X5 can be used to hold key
MCU parameters when it is powered down.
3.1 VSS Power Switched
In the recommended implementation, the internal power switch of the AB18X5 is used to completely turn
off the MCU and/or other system elements. In this case the PSW/nIRQ2 output is configured to generate
the Sleep function. Under normal circumstances, the PSW/nIRQ2pin is pulled to VSS with less than 1 ohm
of resistance, so that the MCU receives full power. The MCU initiates a SLP operation, and when the
AB18X5 enters Sleep Mode the PSW/nIRQ2 pin is opened and power is completely removed from the
MCU. This results in significant additional power savings relative to the other alternatives. A variety of
interrupts, including alarms, timers and external interrupts created by a pushbutton as shown, may be used
to exit Sleep Mode and restore MCU power. The RAM of the AB18X5 may be used to retain critical MCU
parameters.
3.2 VCC Power Switched
An external transistor switch T may also be used to turn off power to the MCU. This implementation allows
switching higher current and maintains a common ground. R can be on the order of megohms, so that
negligible current is drawn when the circuit is active and PSW/nIRQ2 is low.
VCC
VSS
IRQ
VCC
AB18X5
MCU
I2C/SPI
VSS
XO
XI
EXTI
FOUT/nIRQ
R
PSW/nIRQ2
VCC
VSS
IRQ
VCC
AB18X5 MCU
I2C/SPI
VSS
R
T
PSW/nIRQ2
FOUT/nIRQ
ABRACON“ RoHS CORPORATION Complla nl - ESD Sensitive m- rum 41f! mhng Mm" WW L
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 6 of 37 Abracon Drawing #453568 Revision: C
3.3 Reset Driven
In another implementation the AB18X5 controls the system MCU using the reset function rather than
switching power. Since many MCUs use much less power when reset, this implementation can save
system power in some cases.
3.4 Battery Backup
In many systems the main power supply is a battery, so the AB18X5 can minimize its current draw by
powering down the MCU and other peripherals. This battery may be replaceable, and a supercapacitor
charged via the AB18X5 trickle charger can maintain system time and key parameters when the main
battery is removed.
VCC
VSS
nRST RESET
VCC
VSS
AB18X5 MCU
I2C/SPI
PSW/nIRQ2
VCC
VSS
FOUT/nIRQ IRQ
VCC
VSS
AB18X5 MCU
I2C/SPI
VBAT
Backup
Battery/
Supercap
XO
XI
Main
Battery
1.5k*
* Total battery series impedance = 1.5k ohms, which may require an external resistor
ABRACON" RoHS CORPORATION Compllanl - ESD Sensitive m- ['40er 41“ MA.“ [Wm uuuu uuuu 31/ E jl E j E j E j E j E j E j E rmrm rmrm
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 7 of 37 Abracon Drawing #453568 Revision: C
4. Package Pins
4.1 Pin Configuration and Connections
Figure 2 and Table 2 show the QFN-16 pin configurations for the AB18X5 parts. Pins labeled NC must be
left unconnected. The thermal pad, pin 17, on the QFN-16 packages must be connected to VSS.
Figure 2. Pin Configuration Diagram
Table 2: Pin Connections
Pin Name Pin Type Function
Pin Number
AB1805 AB1815
VSS Power Ground 9,17 17
VCC Power System power supply 13 13
XI XT Crystal input 16 16
XO XT Crystal output 15 15
AF Output Autocalibration filter 14 14
VBAT Power Battery power supply 5 5
SCL Input I2C or SPI interface clock 77
SDO Output SPI data output 6
SDI Input SPI data input 9
nCE Input SPI chip select 12
SDA Input I2C data input/output 6
EXTI Input External interrupt input 10 10
WDI Input Watchdog reset input 2 2
nEXTR Input External reset input 3 3
FOUT/nIRQ Output Int 1/function output 11 11
nIRQ2 Output Int 2 output 4 4
CLKOUT/nIRQ3 Output Int 3/clock output 8 8
nTIRQ Output Timer interrupt output 12
nRST Output Reset output 1 1
nRST
WDI
nEXTR
FOUT/nIRQ
EXTI
VSS
SCL
SDA
VBAT
XO
XI
VCC
nTIRQ1nRST
WDI
nEXTR
FOUT/nIRQ
EXTI
SDI
XO
XI
VCC
nCE1
SCL
SDO
VBAT
CLKOUT/nIRQ3
PSW/nIRQ2 PSW/nIRQ2
AF
AB1805 AB1815
CLKOUT/nIRQ3
AF
VSS
PAD
VSS
PAD
m- ['40er 41“ mix.“ [Wm Anmcon" CORPORATION RoHS Compllanl - ESD Sensitive
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 8 of 37 Abracon Drawing #453568 Revision: C
4.2 Pin Descriptions
Table 3 provides a description of the pin connections.
Table 3: Pin Descriptions
Pin Name Description
VSS Ground connection. In the QFN-16 packages the ground slug on the bottom of the package must be
connected to VSS.
VCC Primary power connection. If a single power supply is used, it must be connected to VCC.
VBAT
Battery backup power connection. If a backup battery is not present, VBAT must be connected directly
to VSS, but it may also be used to provide the analog input to the internal comparator (see Analog-
Comparator).
XI Crystal oscillator input connection.
XO Crystal oscillator output connection.
AF Autocalibration filter connection. A 47pF ceramic capacitor must be placed between this pin and VSS
for improved Autocalibration mode timing accuracy.
SCL I/O interface clock connection. It provides the SCL input in both I2C and SPI interface parts. A pull-up
resistor is required on this pin.
SDA (only available in
I2C environments) I/O interface I2C data connection. A pull-up resistor is required on this pin.
SDO (only available in
SPI environments) I/O interface SPI data output connection.
SDI I/O interface SPI data input connection.
nCE (only available in
SPI environments)
I/O interface SPI chip select input connection. It is an active low signal. A pull-up resistor is recom-
mended to be connected to this pin to ensure it is not floating. A pull-up resistor also prevents inadver-
tent writes to the RTC during power transitions.
EXTI
External interrupt input connection. It may be used to generate an External 1 interrupt with polarity
selected by the EX1P bit if enabled by the EX1E bit. The value of the EXTI pin may be read in the EXIN
register bit. This pin does not have an internal pull-up or pull-down resistor and so one must be added
externally. It must not be left floating or the RTC may consume higher current. Instead, it must be con-
nected directly to either VCC or VSS if not used.
WDI
Watchdog Timer reset input connection. It may also be used to generate an External 2 interrupt with
polarity selected by the EX2P bit if enabled by the EX2E bit. The value of the WDI pin may be read in
the WDIN register bit. This pin does not have an internal pull-up or pull-down resistor and so one must
be added externally. It must not be left floating or the RTC may consume higher current. Instead, it
must be connected directly to either VCC or VSS if not used.
nEXTR
External reset input connection. If nEXTR is low and the RS1E bit is set, the nRST output will be driven
to its asserted value as determined by the RSP bit. This pin does not have an internal pull-up or pull-
down resistor and so one must be added externally. It must not be left floating or the RTC may con-
sume higher current. Instead, it must be connected directly to either VCC or VSS if not used.
FOUT/nIRQ
Primary interrupt output connection. This pin is an open drain output. An external pull-up resistor must
be added to this pin. It should be connected to the host device and is used to indicate when the RTC
can be accessed via the serial interface. FOUT/nIRQ may be configured to generate several signals as
a function of the OUT1S field(see 0x11 - Control2). FOUT/nIRQ is also asserted low on a power up
until the AB18X5 has exited the reset state and is accessible via the I/O interface.
1. FOUT/nIRQ can drive the value of the OUT bit.
2. FOUT/nIRQ can drive the inverse of the combined interrupt signal IRQ (see Interrupts).
3. FOUT/nIRQ can drive the square wave output (see 0x13 - SQW) if enabled by SQWE.
4. FOUT/nIRQ can drive the inverse of the alarm interrupt signal AIRQ (see Interrupts).
ABRACON" RoHS VW’COKI’OMTION Complla nl hr mm“. mm m - ESD Sensitive
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 9 of 37 Abracon Drawing #453568 Revision: C
PSW/nIRQ2
Secondary interrupt output connection. It is an open drain output. This pin can be left floating if not
used. PSW/nIRQ2 may be configured to generate several signals as a function of the OUT2S field (see
0x11 - Control2). This pin will be configured as an ~1 switch if the PWR2 bit is set.
1. PSW/nIRQ2 can drive the value of the OUTB bit.
2. PSW/nIRQ2 can drive the square wave output (see 0x13 - SQW) if enabled by SQWE.
3. PSW/nIRQ2 can drive the inverse of the combined interrupt signal IRQ(see Interrupts).
4. PSW/nIRQ2 can drive the inverse of the alarm interrupt signal AIRQ(see Interrupts).
5. PSW/nIRQ2 can drive either sense of the timer interrupt signal TIRQ.
6. PSW/nIRQ2 can function as the power switch output for controlling the power of external devices
(see Sleep Control).
nTIRQ (only available in
I2C environments)
Timer interrupt output connection. It is an open drain output. nTIRQ always drives the active low nTIRQ
signal. If this pin is used, an external pull-up resistor must be added to this pin. If the pin is not used, it
can be left floating.
CLKOUT/nIRQ3
Square Wave output connection. It is a push-pull output, and may be configured to generate one of two
signals.
1. CLKOUT/nIRQ3 can drive the value of the OUT bit.
2. CLKOUT/nIRQ3 can drive the square wave output (see 0x13 - SQW) if enabled by SQWE.
nRST
External reset output connection. It is an open drain output. If this pin is used, an external pull-up resis-
tor must be added to this pin. If the pin is not used, it can be left floating.The polarity is selected by the
RSP bit, which will initialize to 0 on power up to produce an active low output. See Autocalibration Fail
Interrupt ACIRQ for details of the generation of nRST.
Table 3: Pin Descriptions
Pin Name Description
Ar ['40er 41“ MW [Wm Anmcon" CORPORATION RoHS Compllanl - ESD Sensitive
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 10 of 37 Abracon Drawing #453568 Revision: C
5. Electrical Specifications
5.1 Absolute Maximum Ratings
Table 4 lists the absolute maximum ratings.
Table 4: Absolute Maximum Ratings
SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VCC System Power Voltage -0.3 3.8 V
VBAT Battery Voltage -0.3 3.8 V
VIInput voltage VCC Power state -0.3 VCC+ 0.3 V
VIInput voltage VBAT Power state -0.3 VBAT+ 0.3 V
VOOutput voltage VCC Power state -0.3 VCC+ 0.3 V
VOOutput voltage VBAT Power state -0.3 VBAT+ 0.3 V
IIInput current -10 10 mA
IOOutput current -20 20 mA
IOPC PSW Output continuous current 50 mA
IOPP PSW Output pulsed current 1 second pulse 150 mA
VESD ESD Voltage
CDM ±500 V
HBM ±4000 V
ILU Latch-up Current 100 mA
TSTG Storage Temperature -55 125 °C
TOP Operating Temperature -40 85 °C
TSLD Lead temperature Hand soldering for 10 seconds 300 °C
TREF Reflow soldering temperature Reflow profile per JEDEC J-
STD-020D.1 260 °C
m- ['40er 4, {A mix Anmcon" WmCOIKI’OIU‘1'I0N mK m RoHS Compllanl - ESD Sensitive
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 11 of 37 Abracon Drawing #453568 Revision: C
5.2 Power Supply Parameters
Figure 3 and Table 5 describe the power supply and switchover parameters. See Power Control and
Switching for a detailed description of the operations.
Figure 3. Power Supply Switchover
For Table 5, TA = -40 °C to 85 °C, TYP values at 25 °C.
Table 5: Power Supply and Switchover Parameters
SYMBO
LPARAMETER PWR TYPE POWER STATE TEST
CONDITIONS MIN TYP MAX UNIT
VCC System Power Voltage VCC Static VCC Power
Clocks operating
and RAM and
registers retained
1.5 3.6 V
VCCIO VCC I/O Interface
Voltage VCC Static VCC Power I2C or SPI opera-
tion 1.5 3.6 V
VCCST VCC Start-up Voltage(1) VCC Rising POR -> VCC Power 1.6 V
VCCRST VCC Reset Voltage VCC Falling VCC Power -> POR VBAT < VBAT,MIN or
no VBAT
1.3 1.5 V
VCCSWR VCC Rising Switch-over
Threshold Voltage VCC Rising VBAT Power ->
VCC Power VBAT VBATRST 1.6 1.7 V
VCCSWF VCC Falling Switch-over
Threshold Voltage VCC Falling VCC Power ->
VBAT Power VBAT VBATSW,MIN 1.2 1.5 V
VCCSWH
VCC Switchover Thresh-
old Hysteresis(2) VCC Hyst. VCC Power <->
VBAT Power 70 mV
VCCFS
VCC Falling Slew Rate
to switch to VBAT state(4) VCC Falling VCC Power ->
VBAT Power VCC < VCCSW,MAX 0.7 1.4 V/ms
VBAT Battery Voltage VBAT Static VBAT Power
Clocks operating
and RAM and reg-
isters retained
1.4 3.6 V
VBATSW
Battery Switchover Volt-
age Range(5) VBAT Static VCC Power ->
VBAT Power 1.6 3.6 V
ABRACON" RoHS VW’COKI’OMTION Comp! Ia nl nr- puma/1 mlxmg qu - [SD Sensitive
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 12 of 37 Abracon Drawing #453568 Revision: C
VBATRST
Falling Battery POR Volt-
age(7) VBAT Falling VBAT Power ->
POR VCC < VCCSWF 1.1 1.4 V
VBMRG
VBAT Margin above
VCC(3) VBAT Static VBAT Power 200 mV
VBATESR
VBAT supply series resis-
tance(6) VBAT Static VBAT Power 1.0 1.5 k
(1) VCC must be above VCCST to exit the POR state, independent of the VBAT voltage.
(2) Difference between VCCSWR and VCCSWF
.
(3) VBAT must be higher than VCC by at least this voltage to ensure the AB18X5 remains in the VBAT Power state.
(4) Maximum VCC falling slew rate to guarantee correct switchover to VBAT Power state. There is no VCC falling slew rate
requirement if switching to the VBAT power source is not required.
(5) VBAT voltage to guarantee correct transition to VBAT Power state when VCC falls.
(6) Total series resistance of the power source attached to the VBAT pin. The optimal value is 1.5k, which may require an
external resistor. VBAT power source ESR + external resistor value = 1.5k
(7) VBATRST is also the static voltage required on VBAT for register data retention.
Table 5: Power Supply and Switchover Parameters
SYMBO
LPARAMETER PWR TYPE POWER STATE TEST
CONDITIONS MIN TYP MAX UNIT
Ar- ['40er 41“ M W m Anmcon" Wconromnon RoHS Compllanl - [SD Sensitive
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 13 of 37 Abracon Drawing #453568 Revision: C
5.3 Operating Parameters
Table 6 lists the operating parameters.
For Table 6, TA = -40 °C to 85 °C, TYP values at 25 °C.
Table 6: Operating Parameters
SYMBOL PARAMETER TEST
CONDITIONS VCC MIN TYP MAX UNIT
VT+ Positive-going Input Thresh-
old Voltage
3.0V 1.5 2.0
V
1.8V 1.1 1.25
VT- Negative-going Input Thresh-
old Voltage
3.0V 0.8 0.9
V
1.8V 0.5 0.6
IILEAK Input leakage current 3.0V 0.02 80 nA
CIInput capacitance 3 pF
VOH High level output voltage on
push-pull outputs 1.7V – 3.6V 0.8•VCC V
VOL Low level output voltage 1.7V – 3.6V 0.2•VCC V
IOH High level output current on
push-pull outputs VOH = 0.8VCC
1.7V -2 -3.8
mA
1.8V -3 -4.3
3.0V -7 -11
3.6V -8.8 -15
IOL Low level output current VOL = 0.2VCC
1.7V 3.3 5.9
mA
1.8V 6.1 6.9
3.0V 17 19
3.6V 18 20
RDSON PSW output resistance to
VSS PSW Enabled
1.7V 1.7 5.8
1.8V 1.6 5.4
3.0V 1.1 3.8
3.6V 1.05 3.7
IOLEAK Output leakage current 1.7V – 3.6V 0.02 80 nA
ABRACON" RoHS MHCORPOMTION Compllanl m- [W an M.“ m - ESD Sensitive
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 14 of 37 Abracon Drawing #453568 Revision: C
5.4 Oscillator Parameters
Table 7 lists the oscillator parameters.
For Table 7, TA = -40 °C to 85 °C unless otherwise indicated.
VCC = 1.7 to 3.6V, TYP values at 25 °C and 3.0V.
Table 7: Oscillator Parameters
SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
FXT XI and XO pin Crystal Fre-
quency 32.768 kHz
FOF XT Oscillator failure detection
frequency 8kHz
CINX Internal XI and XO pin capac-
itance 1pF
CEX External XI and XO pin PCB
capacitance 1pF
OAXT XT Oscillation Allowance At 25°C using a 32.768 kHz
crystal 270 320 k
FRCC
Calibrated RC Oscillator Fre-
quency(1)
Factory Calibrated at 25°C,
VCC = 2.8V 128 Hz
FRCU Uncalibrated RC Oscillator
Frequency
Calibration Disabled (OFF-
SETR = 0) 89 122 220 Hz
JRCCC RC Oscillator cycle-to-cycle
jitter
Calibration Disabled (OFF-
SETR = 0) – 128 Hz 2000
ppm
Calibration Disabled (OFF-
SETR = 0) – 1 Hz 500
AXT
XT mode digital calibration
accuracy(1)
Calibrated at an initial tem-
perature and voltage -2 2 ppm
AAC
Autocalibration mode timing
accuracy, 512 second period,
TA = -10°C to 60°C(1)
24 hour run time 35
ppm
1 week run time 20
1 month run time 10
1 year run time 3
TAC
Autocalibration mode operat-
ing temperature(2) -10 60 °C
(1) Timing accuracy is specified at 25°C after digital calibration of the internal RC oscillator and 32.768 kHz crystal. A typical
32.768 kHz tuning fork crystal has a negative temperature coefficient with a parabolic frequency deviation, which due to
the crystal alone can result in a change of up to 150 ppm across the entire operating temperature range of -40°C to 85°C
in XT mode. Autocalibration mode timing accuracy is specified relative to XT mode timing accuracy from -10°C to 60°C.
(2) Outside of this temperature range, the RC oscillator frequency change due to temperature may be outside of the allowable
RC digital calibration range (+/-12%) for autocalibration mode.If this happens, an autocalibration failure will occur and the
ACF interrupt flag is set. The AB18X5 should be switched to use the XT oscillator as its clock source. Please see the
Autocalibration Fail section for more details.
1 1w Pawlrn/Lmlxmg WM Compfla m - ESD Sensitive / ‘3 E. a = a; a u- 0—196— E u a: I I I ILA I I I I I I I I 40 -30 -20 -1D 0 10 20 30 40 50 60 7D 80 Temperamre ('C) l ‘3 E. R = 0 3 u- 0 E 0—1-25— x -40 -30 >20 -10 10 20 30 40 50 60 70 80 Temperature (‘C)
AB18X5 Real-Time Clock with Power
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Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 15 of 37 Abracon Drawing #453568 Revision: C
Figure 4 shows the typical calibrated RC oscillator frequency variation vs. temperature. RC oscillator
calibrated at 2.8V, 25°C.
Figure 4. Calibrated RC Oscillator Typical Frequency Variation vs. Temperature
Figure 5 shows the typical uncalibrated RC oscillator frequency variation vs. temperature.
Figure 5. Uncalibrated RC Oscillator Typical Frequency Variation vs. Temperature
115
120
125
130
135
140
145
150
40 30 20 100 1020304050607080
RCFrequency(Hz)
TemperatureC)
VCC =1.8V
VCC =3.0V
T
A
=25 °C
115
120
125
130
135
140
145
40 30 20 100 1020304050607080
RCFrequency(Hz)
TemperatureC)
VCC =1.8V
VCC =3.0V
T
A
=25 °C
ABRACON" RoHS MHCORPOMTION Compllanl m- [W an M.“ m - ESD Sensitive
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 16 of 37 Abracon Drawing #453568 Revision: C
5.5 VCC Supply Current
Table 8 lists the current supplied into the VCC power input under various conditions.
For Table 8, TA = -40 °C to 85 °C, VBAT = 0 V to 3.6 V
TYP values at 25 °C, MAX values at 85 °C, VCC Power state
Table 8: VCC Supply Current
SYMBOL PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
IVCC:I2C VCC supply current during I2C
burst read/write
400kHz bus speed, 2.2k pull-up
resistors on SCL/SDA(1)
3.0V 6 10
µA
1.8V 1.5 3
IVCC:SPIW
VCC supply current during SPI
burst write 2 MHz bus speed (2) 3.0V 8 12
µA
1.8V 4 6
IVCC:SPIR
VCC supply current during SPI
burst read 2 MHz bus speed (2) 3.0V 23 37
µA
1.8V 13 21
IVCC:XT
VCC supply current in XT oscil-
lator mode
Time keeping mode with XT
oscillator running(3)
3.0V 55 330
nA
1.8V 51 290
IVCC:RC
VCC supply current in RC oscil-
lator mode
Time keeping mode with only
the RC oscillator running (XT
oscillator is off)(3)
3.0V 14 220
nA
1.8V 11 170
IVCC:ACAL
Average VCC supply current in
Autocalibrated RC oscillator
mode
Time keeping mode with only
RC oscillator running and Auto-
calibration enabled. ACP =
512 seconds(3)
3.0V 22 235
nA
1.8V 18 190
IVCC:CK32
Additional VCC supply current
with CLKOUT at 32.786 kHz
Time keeping mode with XT
oscillator running, 32.786 kHz
square wave on CLKOUT(4)
3.0V 3.6 8
µA
1.8V 2.2 5
IVCC:CK128
Additional VCC supply current
with CLKOUT at 128 Hz
All time keeping modes, 128 Hz
square wave on CLKOUT(4)
3.0V 7 35
nA
1.8V 2.5 20
(1) Excluding external peripherals and pull-up resistor current. All other inputs (besides SDA and SCL) are at 0V or VCC.
AB1805 only. Test conditions: Continuous burst read/write, 0x55 data pattern, 25 s between each data byte, 20 pF load
on each bus pin.
(2) Excluding external peripheral current. All other inputs (besides SDI, nCE and SCL) are at 0V or VCC. AB1815 only. Test
conditions: Continuous burst write, 0x55 data pattern, 25 s between each data byte, 20 pF load on each bus pin.
(3) All inputs and outputs are at 0 V or VCC.
(4) All inputs and outputs except CLKOUT are at 0 V or VCC. 15 pF capacitive load on CLKOUT.
umcon‘ ® RoHS he Pawn/Linking WMCDRPOMTION Cornpfla n! - ESD Sensitive E / / / / g u / / g // :5; , // E “fidr—g» g 40 -3o 20 -1o 0 1o 20 30 40 so so 70 so Temperahlre ['C) VCC Pawerstate RC Mode Current (HA) “1 L ‘L -40 -30 -20 -10 0 10 20 30 Temperahlre ['C) 40 50
AB18X5 Real-Time Clock with Power
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Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 17 of 37 Abracon Drawing #453568 Revision: C
Figure 6 shows the typical VCC power state operating current vs. temperature in XT mode.
Figure 6. Typical VCC Current vs. Temperature in XT Mode
Figure 7 shows the typical VCC power state operating current vs. temperature in RC mode.
Figure 7. Typical VCC Current vs. Temperature in RC Mode
40
50
60
70
80
90
100
110
120
130
40 30 20 100 1020304050607080
VCCPowerState,XTModeCurrent(nA)
TemperatureC)
VCC =1.8V
VCC =3.0V
T
A
=25°C
5
15
25
35
45
55
65
75
40 30 20 100 1020304050607080
VCCPowerState,RCModeCurrent(nA)
TemperatureC)
VCC =1.8V
VCC =3.0V
T
A
=25°C
RoHS Compfla m é‘J’fifif‘nfirfilfi ® he Pawvn/Lmlnng kgdhrr - ESD Sensitive VCC Power State, Amocal Mode Current: (HA) 740 730 720 710 u 10 20 so an 50 so 70 Temperature ('c) 70 so // A N g 50 E 2 5 40 3 5 ‘2 an / E u 20 y» / u > m V o 1.5 2 2.5 3 3.5 vcc Volvage (v)
AB18X5 Real-Time Clock with Power
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Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 18 of 37 Abracon Drawing #453568 Revision: C
Figure 8 shows the typical VCC power state operating current vs. temperature in RC Autocalibration mode.
Figure 8. Typical VCC Current vs. Temperature in RC Autocalibration Mode
Figure 9 shows the typical VCC power state operating current vs. voltage for XT Oscillator and RC
Oscillator modes and the average current in RC Autocalibrated mode.
Figure 9. Typical VCC Current vs. Voltage, Different Modes of Operation
5
10
15
20
25
30
35
40
45
50
55
40 30 20 100 10203040506070
VCCPowerState,AutocalModeCurrent(nA)
TemperatureC)
VCC =1.8V
VCC =3.0V
T
A
=25°C
0
10
20
30
40
50
60
70
1.522.533.5
VCCPowerState Current(nA)
VCCVoltage(V)
RCOscillator Mode
XTOscillator Mode
RCAutocalibratedMode
TA=25°C
he Pawn aflmlxmg MM" Anmcon‘ CORPORATION ® ! RoHS Complla m - ESD Sensitive vcc Currem (uA) 30 25 N o ._. u ._. o 2.4 2.6 2.3 vcc Voltage (v) 3 3.2 3.4 3.6
AB18X5 Real-Time Clock with Power
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Page 19 of 37 Abracon Drawing #453568 Revision: C
Figure 10 shows the typical VCC power state operating current during continuous I2C and SPI burst read
and write activity. Test conditions: TA = 25 °C, 0x55 data pattern, 25 s between each data byte, 20 pF
load on each bus pin, pull-up resistor current not included.
Figure 10. Typical VCC Current vs. Voltage, I²C and SPI Burst Read/Write
0
5
10
15
20
25
30
1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6
VCCCurrent(µA)
VCCVoltage(V)
I
2
CBurstRead/Write
SPI BurstRead
SPIBurst Write
T
A
=25 °C
I ABRACON ® RoHS 1.. Pawn/huh"; WMCDRPOMTION Compfla m - ESD Sensitive 5 4 g 3 E 3 u 2 u > 1 0 u u u u u u u u u 1.8 2 2.2 2.4 2.5 2.8 3 3.2 3.4 3.6 VCC Voltage (V)
AB18X5 Real-Time Clock with Power
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Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 20 of 37 Abracon Drawing #453568 Revision: C
Figure 11 shows the typical VCC power state operating current with a 32.768 kHz clock output on the
CLKOUT pin. Test conditions: TA = 25 °C, All inputs and outputs except CLKOUT are at 0 V or VCC. 15 pF
capacitive load on the CLKOUT pin.
Figure 11. Typical VCC Current vs. Voltage, 32.768 kHz Clock Output
0
1
2
3
4
5
1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6
VCCCurrentA)
VCCVoltage(V)
TA=25 °C
Anmcon‘ CORPORATION 1., I'uwya/lmhng MM” RoHS Compliant - ESD Sensitive van pawer Statenfl Mode Currem (M) u a 10 20 30 Temperature (°c)
AB18X5 Real-Time Clock with Power
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Page 21 of 37 Abracon Drawing #453568 Revision: C
5.6 VBAT Supply Current
Table 9 lists the current supplied into the VBAT power input under various conditions.
Figure 12 shows the typical VBAT power state operating current vs. temperature in XT mode.
Figure 12. Typical VBAT Current vs. Temperature in XT Mode
For Table 9, TA = -40 °C to 85 °C, TYP values at 25 °C, MAX values at 85 °C, VBAT Power state.
Table 9: VBAT Supply Current
SYMBOL PARAMETER TEST CONDITIONS VCC VBAT MIN TYP MAX UNIT
IVBAT:XT VBAT supply current in
XT oscillator mode
Time keeping mode with
XT oscillator running(1) < VCCSWF
3.0V 56 330
nA
1.8V 52 290
IVBAT:RC VBAT supply current in
RC oscillator mode
Time keeping mode with
only the RC oscillator run-
ning (XT oscillator is off)(1)
< VCCSWF
3.0V 16 220
nA
1.8V 12 170
IVBAT:ACAL
Average VBAT supply
current in Autocalibrated
RC oscillator mode
Time keeping mode with
the RC oscillator running.
Autocalibration enabled.
ACP = 512 seconds(1)
< VCCSWF
3.0V 24 235
nA
1.8V 20 190
IVBAT:VCC VBAT supply current in
VCC powered mode VCC powered mode(1) 1.7 - 3.6 V
3.0V -5 0.6 20
nA
1.8V -10 0.5 16
(1) Test conditions: All inputs and outputs are at 0 V or VCC.
40
50
60
70
80
90
100
110
120
130
40 30 20 100 1020304050607080
VBATPowerState,XTModeCurrent(nA)
TemperatureC)
VBAT=1.8V
VBAT=3.0V
T
A
=25 °C
RoHS compfla m é‘oBrrfiErfir'fi ® Pawn/Lurker; Maker 7: van Pawer State nc Mode Current (nA) L o 730 720 710 D 10 20 30 40 50 60 7D 80 Temperature ('c) \ vsAT Power sme Autocal Mode Current (nA) ,40 ,30 720 710 0 10 20 3D 40 50 60 70 Temperature ('c)
AB18X5 Real-Time Clock with Power
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Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 22 of 37 Abracon Drawing #453568 Revision: C
Figure 13 shows the typical VBAT power state operating current vs. temperature in RC mode.
Figure 13. Typical VBAT Current vs. Temperature in RC Mode
Figure 14 shows the typical VBAT power state operating current vs. temperature in RC Autocalibration
mode.
Figure 14. Typical VBAT Current vs. Temperature in RC Autocalibration Mode
5
15
25
35
45
55
65
75
40 30 20 100 1020304050607080
VBATPowerState,RCModeCurrent(nA)
TemperatureC)
VBAT=1.8V
VBAT=3.0V
T
A
=25 °C
5
10
15
20
25
30
35
40
45
50
55
40 30 20 100 10203040506070
VBATPowerState,AutocalModeCurrent(nA)
TemperatureC)
VBAT=1.8V
VBAT=3.0V
T
A
=25 °C
RoHS Camp“: :11 &B&“&R%%'§ ® Pawrn/Lmlmg Maker - ESD Sensitive \1 o m m o o 4; o VBAT Current (M) N m o o ._. o o 1.5 2 2.5 3 3.5 VBAT Vnkage (V) .0 m .0 m .0 x: .0 :n \3 .0 1:. .0 w VBAT Current(nA) .0 N .0 ,_. a E" m N 2.5 3 3.5 VBAT Voltage (V)
AB18X5 Real-Time Clock with Power
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Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 23 of 37 Abracon Drawing #453568 Revision: C
Figure 15 shows the typical VBAT power state operating current vs. voltage for XT Oscillator and RC
Oscillator modes and the average current in RC Autocalibrated mode, VCC = 0 V.
Figure 15. Typical VBAT Current vs. Voltage, Different Modes of Operation
Figure 16 shows the typical VBAT current when operating in the VCC power state, VCC = 1.7 V.
Figure 16. Typical VBAT Current vs. Voltage in VCC Power State
0
10
20
30
40
50
60
70
1.5 2 2.5 3 3.5
VBATCurrent(nA)
VBATVoltage(V)
RCOscillator Mode
XTOscillator Mode
RCAutocalibratedMode
T
A
=25 °C
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.522.533.5
VBATCurrent(nA)
VBATVoltage(V)
T
A
=25 °C, VCC =1.7V
ABRACON" RoHS VW’COKI’OMTION Compllanl nr- [mt-Mn mlxmg M - ESD Sensitive
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Page 24 of 37 Abracon Drawing #453568 Revision: C
5.7 BREF Electrical Characteristics
Table 10 lists the parameters of the VBAT voltage thresholds. BREF values other than those listed in the
table are not supported.
For Table 10, TA = -20 °C to 70 °C, TYP values at 25 °C, VCC = 1.7 to 3.6V.
Table 10: BREF Parameters
SYMBOL PARAMETER BREF MIN TYP MAX UNIT
VBRF VBAT falling threshold
0111 2.3 2.5 3.3
V
1011 1.9 2.1 2.8
1101 1.6 1.8 2.5
1111 1.4
VBRR VBAT rising threshold
0111 2.6 3.0 3.4
V
1011 2.1 2.5 2.9
1101 1.9 2.2 2.7
1111 1.6
VBRH VBAT threshold hysteresis
0111 0.5
V
1011 0.4
1101 0.4
1111 0.2
TBR VBAT analog comparator recom-
mended operating temperature range All values -20 70 °C
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Page 25 of 37 Abracon Drawing #453568 Revision: C
5.8 I²C AC Electrical Characteristics
Figure 17 and Table 11 describe the I2C AC electrical parameters.
Figure 17. I²C AC Parameter Definitions
For Table 11, TA = -40 °C to 85 °C, TYP values at 25 °C.
Table 11: I²C AC Electrical Parameters
SYMBOL PARAMETER VCC MIN TYP MAX UNIT
fSCL SCL input clock frequency 1.7V-3.6V 10 400 kHz
tLOW Low period of SCL clock 1.7V-3.6V 1.3 µs
tHIGH High period of SCL clock 1.7V-3.6V 600 ns
tRISE Rise time of SDA and SCL 1.7V-3.6V 300 ns
tFALL Fall time of SDA and SCL 1.7V-3.6V 300 ns
tHD:STA START condition hold time 1.7V-3.6V 600 ns
tSU:STA START condition setup time 1.7V-3.6V 600 ns
tSU:DAT SDA setup time 1.7V-3.6V 100 ns
tHD:DAT SDA hold time 1.7V-3.6V 0 ns
tSU:STO STOP condition setup time 1.7V-3.6V 600 ns
tBUF Bus free time before a new transmission 1.7V-3.6V 1.3 µs
tBUF
SCL
SDA
tHD:STA
tLOW
tRISE
SDA tSU:STA
tHD:DAT
tHIGH
tSU:DAT
tSU:STO
tFALL
ABRACON“ RoHS CORPORATION Complla nl - ESD Sensitive he mm 41/! mhng Mm" \ x T w \ »\ w »\ w ‘ 1‘ a‘ F 1 fl wk fl ‘ 7 ' ik—H H x ‘ 7’ + “—W ,, ‘ \ \ m w L—J4—H
AB18X5 Real-Time Clock with Power
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Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 26 of 37 Abracon Drawing #453568 Revision: C
5.9 SPI AC Electrical Characteristics
Figure 18, Figure 19, and Table 12 describe the SPI AC electrical parameters.
Figure 18. SPI AC Parameter Definitions – Input
Figure 19. SPI AC Parameter Definitions – Output
For Table 12, TA = -40 °C to 85 °C, TYP values at 25 °C.
SCL tHIGH
tLOW
nCE
tSU:NCE
SDI
tSU:SDI tHD:SDI
MSB IN LSB IN
tRISE
tFALL
tHD:NCE
tSU:CE
tBUF
SCL
nCE
SDI
tHD:SDO
tSU:SDO
SDO
ADDR LSB
MSB OUT LSB OUT
tHZ
A MA.“ [Wm Anmcon" CORPORATION RoHS Compllanl - ESD Sensitive
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Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 27 of 37 Abracon Drawing #453568 Revision: C
Table 12: SPI AC Electrical Parameters
SYMBOL PARAMETER VCC MIN TYP MAX UNIT
fSCL SCL input clock frequency 1.7V–3.6V 0.01 2 MHz
tLOW Low period of SCL clock 1.7V–3.6V 200 ns
tHIGH High period of SCL clock 1.7V–3.6V 200 ns
tRISE Rise time of all signals 1.7V–3.6V 1 µs
tFALL Fall time of all signals 1.7V–3.6V 1 µs
tSU:NCE nCE low setup time to SCL 1.7V–3.6V 200 ns
tHD:NCE nCE hold time to SCL 1.7V–3.6V 200 ns
tSU:CE nCE high setup time to SCL 1.7V–3.6V 200 ns
tSU:SDI SDI setup time 1.7V–3.6V 40 ns
tHD:SDI SDI hold time 1.7V–3.6V 50 ns
tSU:SDO SDO output delay from SCL 1.7V–3.6V 150 ns
tHD:SDO SDO output hold from SCL 1.7V–3.6V 0 ns
tHZ SDO output Hi-Z from nCE 1.7V–3.6V 250 ns
tBUF nCE high time before a new transmission 1.7V–3.6V 200 ns
Anmcon" RoHS CORPORATION Compllanl - ESD Sensitive m- ['40er 41“ mix.“ [Wm k—H ,T , \ H—H fir, L % TP +w
AB18X5 Real-Time Clock with Power
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Page 28 of 37 Abracon Drawing #453568 Revision: C
5.10 Power On AC Electrical Characteristics
Figure 20 and Table 13 describe the power on AC electrical characteristics for the FOUT pin and XT
oscillator.
Figure 20. Power On AC Electrical Characteristics
For Table 13, TA = -40 °C to 85 °C, VBAT < 1.2 V
Table 13: Power On AC Electrical Parameters
SYMBOL PARAMETER VCC TAMIN TYP MAX UNIT
tLOW:VCC Low period of VCC to ensure a valid POR 1.7V–3.6V
85 °C 0.1
s
25 °C 0.1
-20 °C 1.5
-40 °C 10
tVL:FOUT VCC low to FOUT low 1.7V–3.6V
85 °C 0.1
s
25 °C 0.1
-20 °C 1.5
-40 °C 10
tVH:FOUT VCC high to FOUT high 1.7V–3.6V
85 °C 0.4
s
25 °C 0.5
-20 °C 3
-40 °C 20
tXTST FOUT high to XT oscillator start 1.7V–3.6V
85 °C 0.4
s
25 °C 0.4
-20 °C 0.5
-40 °C 1.5
VCC
FOUT tVL:FOUT
tLOW:VCC
tVH:FOUT
VCCRST VCCST
XT
tXTST
Anmcon" RoHS CORPORATION Compllanl - ESD Sensitive m- ['40er 41“ mix.“ [Wm ’T ’T 9‘ F \ \ fir: igo—w w w x ‘7 \Z T ' ‘ 7 ‘ m w -1 L w + ,
AB18X5 Real-Time Clock with Power
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Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 29 of 37 Abracon Drawing #453568 Revision: C
5.11 nRST AC Electrical Characteristics
Figure 21 and Table 14 describe the nRST and nEXTR AC electrical characteristics.
Figure 21. nRST AC Parameter Characteristics
For Table 14, TA = -40 °C to 85 °C, TYP at 25 °C unless specified otherwise, VBAT < 1.2 V.
Table 14: nRST AC Electrical Parameters
SYMBOL PARAMETER VCC TAMIN TYP MAX UNIT
tLOW:VCC Low period of VCC to ensure a
valid POR 1.7V-3.6V
85 °C 0.1
s
25 °C 0.1
-20 °C 1.5
-40 °C 10
tVL:NRST VCC low to nRST low 1.7V-3.6V
85 °C 0.1
s
25 °C 0.1
-20 °C 1.5
-40 °C 10
tVH:NRST VCC high to nRST high 1.7V-3.6V
85 °C 0.5
s
25 °C 0.5
-20 °C 3.5
-40 °C 25
tRL:NRST nEXTR low to nRST low 1.7V-3.6V -40 °C to 85 °C 30 50 ns
tRH:NRST nEXTR high to nRST high 1.7V-3.6V -40 °C to 85 °C 50 80 ns
VCC VCCRST
nRST tVL:NRST
tLOW:VCC
tVH:NRST
nEXTR
tRH:NRST
tRL:NRST
VCCST
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AB18X5 Real-Time Clock with Power
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Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 30 of 37 Abracon Drawing #453568 Revision: C
6. Tape and Reel Information
D C B
DetailA
A
5?
G
R=4mm
R=4mm
DetailB
NL
W1
W2 (outerwidthatHUB)
W3 (innerwidthatouteredgeofreel)
(thickness)
T
DetailADetailB
(innerwidth
atHUB)
REELDRAWING
R0.60
REF
0.35
REF
R0.65
REF DETAILA
P2 P0
P1 A0
FW
øD0
øD1
E1
DetailA
Y
Y
B0
K0
3?
REF
K1
SECTIONYY
CARRIERTAPEDRAWING
m- ['40er 41“ MA.“ [Wm Anmcon" CORPORATION RoHS Compllanl - ESD Sensitive
AB18X5 Real-Time Clock with Power
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Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 31 of 37 Abracon Drawing #453568 Revision: C
Table 15: Tape and Reel Dimensions
330 x 178 x 12 mm Reel Dimensions 3x3 QFN Carrier Tape Dimensions
Symbol MIN TYP MAX Units Symbol MIN TYP MAX Units
T 2.3 2.5 2.7
mm
B0 3.2 3.3 3.4
mm
N 178.0 K0 0.9 1.0 1.1
L 330.0 K1 0.25 0.3 0.35
W1 12.4 12.4 12.6 D0 1.50 1.55 1.60
W2 18.4 D1 1.5
W3 12.4 15.4 P0 3.9 4.0 4.1
C 12.8 13.0 13.5 P1 7.9 8.0 8.1
D 20.2 P2 1.9 2.0 2.1
A 10.0 A0 3.2 3.3 3.4
G 4.0 E1 1.65 1.75 1.85
B 1.5 F 5.4 5.5 5.6
W 11.7 12.0 12.3
1., l'uwyn/lmlmg Mm" Anmcon‘ CORPORATION RoHS Compliant - ESD Sensitive Temperature ::> ._T,, -5"C 25 L—Time we to Peak Time 2:)
AB18X5 Real-Time Clock with Power
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Page 32 of 37 Abracon Drawing #453568 Revision: C
7. Reflow Profile
Figure 22 illustrates the reflow soldering requirements.
Figure 22. Reflow Soldering Diagram
Table 16: Reflow Soldering Requirements (Pb-free assembly)
Profile Feature Requirement
Preheat/Soak
Temperature Min (Tsmin)
Temperature Max (Tsmax)
Time (ts) from (Tsmin to Tsmax)
150 °C
200 °C
60-120 seconds
Ramp-up rate (TL to Tp) 3 °C/second max.
Liquidous temperature (TL)
Time (tL) maintained above TL
217 °C
60-150 seconds
Peak package body temperature (Tp)260 °C max.
Time (tp) within 5 °C of Tp30 seconds max.
Ramp-down rate (Tp to TL)6 °C/second max.
Time 25 °C to peak temperature 8 minutes max.
ABRACON" RoHS VW’COKI’OMTION Complla nl hr pm“. my I“ - ESD Sensitive
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 33 of 37 Abracon Drawing #453568 Revision: C
8. Ordering Information
Table 17: Ordering Information
AB18X5 Orderable Part Numbers
Package Temperature
Range MSL Level(2)
P/N Tape and Reel Qty
AB1805-T3 3000pcs/reel Pb-Free(1) 16-Pin QFN 3 x
3 mm -40 to +85 oC 1
AB1815-T3 3000pcs/reel
(1) Compliant and certified with the current RoHS requirements for all 6 substances, including the requirement that lead not
exceed 0.1% by weight in raw homogeneous materials. The package was designed to be soldered at high temperatures
(per reflow profile) and can be used in specified lead-free processes.
(2) Moisture Sensitivity Level rating according to the JEDEC J-STD-020D.1 industry standard classifications.
h- "mm/1 mink mm." Anmcon‘ CORPORATION RoHS Compua m - ESD Sensitive
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 34 of 37 Abracon Drawing #453568 Revision: C
9. Notes
i. The parts are manufactured in accordance with this specification. If other conditions and specifica-
tions which are required for this specification, please contact ABRACON for more information.
ii. ABRACON will supply the parts in accordance with this specification unless we receive a written
request to modify prior to an order placement.
iii. In no case shall ABRACON be liable for any product failure from inappropriate handling or operation
of the item beyond the scope of this specification.
iv. When changing your production process, please notify ABRACON immediately.
v. ABRACON Corporation’s products are COTS – Commercial-Off-The-Shelf products; suitable for
Commercial, Industrial and, where designated, Automotive Applications. ABRACON’s products are
not specifically designed for Military, Aviation, Aerospace, Life-dependant Medical applications or any
application requiring high reliability where component failure could result in loss of life and/or property.
For applications requiring high reliability and/or presenting an extreme operating environment, written
consent and authorization from ABRACON Corporation is required. Please contact ABRACON Cor-
poration for more information.
vi. All specifications and Marking will be subject to change without notice.
x ABRACON ROHS CORPORATION Compile m h- "mm/1 mink mm." - ESD Sensitive Prices Taxes Payment Terms Deliveg and Shigment Purchase Order Changes and Cancellations
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 35 of 37 Abracon Drawing #453568 Revision: C
10. ABRACON CORPORATION – TERMS & CONDITIONS OF SALE
The following are the terms and conditions under which Abracon Corporation (“AB”) agrees to sell, to the
entity named on the face hereof (“Buyer”), the products specified on the face hereof (the “Products”).
Notwithstanding Buyer’s desire to use standardized RFQs, purchase order forms, order forms,
acknowledgment forms and other documents which may contain terms in addition to or at variance with
these terms, it is expressly understood and agreed that other forms shall neither add to, nor vary, these
terms whether or not these terms are referenced therein. Buyer may assent to these terms by written
acknowledgment, implication and/or by acceptance or payment of goods ordered any of which will
constitute assent.
1. Prices: Prices shown on the face hereof are in US dollars, with delivery terms specified herein and
are exclusive of any other charges including, without limitation, fees for export, special packaging,
freight, insurance and similar charges. AB reserves the right to increase the price of Products by writ-
ten notice to Buyer at least thirty (30) days prior to the original date of shipment. When quantity price
discounts are quoted by AB, the discounts are computed separately for each type of product to be
sold and are based upon the quantity of each type and each size ordered at any one time. If any dis-
counted order is reduced by Buyer with AB’s consent, the prices shall be adjusted to the higher prices,
if applicable, for the remaining order.
2. Taxes: Unless otherwise specified in the quotation, the prices do not include any taxes, import or
export duties, tariffs, customs charges or any such other levies. Buyer agrees to reimburse AB the
amount of any federal, state, county, municipal, or other taxes, duties, tariffs, or custom charges AB is
required to pay. If Buyer is exempt from any such charges, Buyer must provide AB with appropriate
documentation.
3. Payment Terms: For each shipment, AB will invoice Buyer for the price of the Products plus all appli-
cable taxes, packaging, transportation, insurance and other charges. Unless otherwise stated in a
separate agreement or in AB’s quotation, payments are due within thirty (30) days from the date of
invoice, subject to AB’s approval of Buyer’s credit application. All invoicing disputes must be submit-
ted in writing to AB within ten (10) days of the receipt of the invoice accompanied by a reasonably
detailed explanation of the dispute. Payment of the undisputed amounts shall be made timely. AB
reserves the right to require payment in advance or C.O.D. and otherwise modified credit terms.
When partial shipments are made, payments for such shipments shall become due in accordance
with the above terms upon submission of invoices. If, at the request of Buyer, shipment is postponed
for more than thirty (30) days, payment will become due thirty days after notice to Buyer that Products
are ready for shipment. Any unpaid due amounts will be subject to interest at one decimal five per-
cent (1.5%) per month, or, if less, the maximum rate allowed by law.
4. Delivery and Shipment: Shipment dates are estimates only. Failure to deliver by a specified date
shall neither entitle Buyer to any compensation nor impose any liability on AB. AB reserves the right
to ship and bill ten percent more or less than the exact quantity specified on the face hereof. All ship-
ments will be made Ex Works as per Incoterms 2000 from AB’s place of shipment. In the absence of
specific instructions, AB will select the carrier. Claims against AB for shortages must be made in writ-
ing within ten (10) days after the arrival of the shipment. AB is not required to notify Buyer of the ship-
ment. Buyer shall pay all freight charges, insurance and other shipping expenses. Freight charges,
insurance and other shipping expenses itemized in advance of actual shipment, if any, are estimates
only that are calculated on the basis of standard tariffs and may not reflect actual costs. Buyer must
pay actual costs.
5. Purchase Order Changes and Cancellations: Purchase orders for standard AB Products may not
be canceled within sixty (60) days of the original shipping date. Purchase orders for non-standard AB
Products are non-cancelable and non-returnable. All schedule changes must be requested at least
thirty (30) days prior to original shipping date. Maximum schedule change “push-out” shall be no
more than thirty (30) days from original shipping date. AB may terminate or cancel this order, in whole
or in part, at any time prior to the completion of performance by written notice to Buyer without incur-
Anmcon‘ CORPORATION in- I'uwrvafl mhng awn." RoHS Compliant - ESD Sensitive Title and Risk of Loss Packing Securiiy lnierest Sgecifications Acceptance Limiied Warranties and Disclaimers
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 36 of 37 Abracon Drawing #453568 Revision: C
ring any liability to Buyer for breach of contract or otherwise. AB reserves the right to allocate Prod-
ucts in its sole discretion among Buyer and other potential buyers, or defer or delay the shipment of
any Product, which is in short supply due to any reason.
6. Title and Risk of Loss: AB’s responsibility for any loss or damage ends, and title passes, when
Products are delivered Ex Works as per Incoterms 2000 at AB’s designated shipping location to car-
rier, to Buyer or to Buyer’s agent, whichever occurs first.
7. Packing: Packaging shall be AB’s standard shipping materials or as specified on the face hereof.
Any cost of non-standard packaging and handling requested by Buyer shall be abided by AB provided
Buyer gives reasonable prior notice and agrees in writing to pay additional costs.
8. Security Interest: Buyer hereby grants AB a purchase money security interest in the Products sold
and in the proceeds of resale of such Products until such time as Buyer has paid all charges. AB
retains all right and remedies available to AB under the Uniform Commercial Code.
9. Specifications: Specifications for each Product are the specifications specified in the published data-
sheets of such Product, as of the date of AB’s quotation (the “Specifications”). Except as otherwise
agreed, AB reserves the right to modify the Specifications at any time without adversely affecting the
functionality.
10. Acceptance: Unless Buyer notifies AB in writing within ten (10) days from the date of receipt of Prod-
ucts that the Products fail to conform to the Specifications, the Products will be deemed accepted by
Buyer. No such claim of non-conformity shall be valid if (i) the Products have been altered, modified
or damaged by Buyer, (ii) the rejection notice fails to explain the non-conformance in reasonable detail
and is not accompanied by a test report evidencing the non-conformity, or (iii) rejected Products are
not returned to AB within thirty (30) days of rejection; provided, that no Product returns may be made
without a return material authorization issued by AB.
11. Limited Warranties and Disclaimers: AB warrants to Buyer that each Product, for a period of twelve
(12) months from shipment date thereof, will conform to the Specifications and be free from defects in
materials and workmanship. AB’s sole liability and Buyer’s exclusive remedy for Products that fail to
conform to this limited warranty (“Defective Products”) is limited to repair or replacement of such
Defective Products, or issue a credit or rebate of no more than the purchase price of such Defective
Products, at AB’s sole option and election. This warranty shall not apply: (i) if Products have been
damaged or submitted to abnormal conditions (mechanical, electrical, or thermal) during transit, stor-
age, installation, or use; or (ii) if Products are subject to Improper Use (as defined below); or (iii) if the
non-conformance of Products results from misuse, neglect, improper testing, storage, installation,
unauthorized repair, alteration, or excess usage at or beyond the maximum values (temperature limit,
maximum voltage, and other Specification limits) defined by AB; (iv) to any other default not attribut-
able to AB; or (v) removal, alteration, or tampering of the original AB product labeling. This warranty
does not extend to Products or components purchased from entities other than AB or AB’s authorized
distributors or to third-party software or documentation that may be supplied with any Product. In the
event no defect or breach of warranty is discovered by AB upon receipt of any returned Product, such
Product will be returned to Buyer at Buyer’s expense and Buyer will reimburse AB for the transporta-
tion charges, labor, and associated charges incurred in testing the allegedly Defective Product. The
above warranty is for Buyer’s benefit only, and is non-transferable. OTHER THAN THE LIMITED
WARRANTY SET FORTH ABOVE, AB MAKES NO WARRANTIES, EXPRESS, STATUTORY,
IMPLIED, OR OTHERWISE AND SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT, TO
THE MAXIMUM EXTENT PERMITTED BY LAW. WITHOUT LIMITING THE GENERALITY OF THE
FOREGOING DISCLAIMERS, AB INCORPORATES BY REFERENCE ANY PRODUCT-SPECIFIC
WARRANTY DISCLAIMERS SET FORTH IN THE PUBLISHED PRODUCT DATASHEETS.
12. Limitation of Liability: AB SHALL HAVE NO LIABILITY FOR LOSS ARISING FROM ANY CLAIM
MADE AGAINST BUYER, OR FOR SPECIAL, INDIRECT, RELIANCE, INCIDENTAL, CONSEQUEN-
TIAL, OR PUNITIVE DAMAGES INCLUDING, WITHOUT LIMITATION, LOSS OF USE, PROFITS,
REVENUES, OR COST OF PROCUREMENT OF SUBSTITUTE GOODS BASED ON ANY BREACH
1., "mm/1 mink MM" Anmcon‘ CORPORATION RoHS Compile m - ESD Sensitive Improper Use Miscellaneous
AB18X5 Real-Time Clock with Power
Management Family
Date of Issue: October 16, 2014 3.0 x 3.0 mm
Page 37 of 37 Abracon Drawing #453568 Revision: C
OR DEFAULT OF AB, HOWEVER CAUSED, AND UNDER ANY THEORY OF LIABILITY. BUYER’S
SOLE REMEDY AND AB’S SOLE AND TOTAL LIABILITY FOR ANY CAUSE OF ACTION,
WHETHER IN CONTRACT (INCLUDING BREACH OF WARRANTY) OR TORT (INCLUDING NEG-
LIGENCE OR MISREPRESENTATION) OR UNDER STATUTE OR OTHERWISE SHALL BE LIM-
ITED TO AND SHALL NOT EXCEED THE AGGREGATE AMOUNTS PAID BY BUYER TO AB FOR
PRODUCTS WHICH GIVE RISE TO CLAIMS. BUYER SHALL ALWAYS INFORM AB OF ANY
BREACH AND AFFORD AB REASONABLE OPPORTUNITY TO CORRECT ANY BREACH. THE
FOREGOING LIMITATIONS SHALL APPLY REGARDLESS OF WHETHER AB HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND NOTWITHSTANDING THE FAILURE
OF ESSENTIAL PURPOSE OF ANY LIMITED REMEDY.
13. Improper Use: Buyer agrees and covenants that, without AB’s prior written approval, Products will
not be used in life support systems, human implantation, nuclear facilities or systems or any other
application where Product failure could lead to loss of life or catastrophic property damage (each such
use being an “Improper Use”). Buyer will indemnify and hold AB harmless from any loss, cost, or
damage resulting from Improper Use of the Products.
14. Miscellaneous: In the event of any insolvency or inability to pay debts as they become due by Buyer,
or voluntary or involuntary bankruptcy proceeding by or against Buyer, or appointment of a receiver or
assignee for the benefit of creditors of Buyer, AB may elect to cancel any unfulfilled obligations. No
Products or underlying information or technology may be exported or re-exported, directly or indi-
rectly, contrary to US law or US Government export controls. AB will be excused from any obligation
to the extent performance thereof is caused by, or arises in connection with, acts of God, fire, flood,
riots, material shortages, strikes, governmental acts, disasters, earthquakes, inability to obtain labor
or materials through its regular sources, delay in delivery by AB’s supplies or any other reason beyond
the reasonable control of AB. In the event any one or more of the provisions contained herein shall for
any reason be held to be invalid, illegal, or unenforceable in any respect, such invalidity, illegality, or
unenforceability shall not affect any other provision hereof and these terms shall be construed as if
such invalid, illegal, or unenforceable provision had never been contained herein. A waiver of a
breach or default under these terms shall not be a waiver of any subsequent default. Failure of AB to
enforce compliance with any of these terms shall not constitute a waiver of such terms. These terms
are governed by the laws of the State of California without reference to conflict of law principles. The
federal and state courts located within the State of California will have exclusive jurisdiction to adjudi-
cate any dispute arising out of these terms.
END

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