Real Time Clocks

Results: 2,405
Manufacturer
ABLIC Inc.Abracon LLCAmbiq Micro, Inc.ams-OSRAM USA INC.Analog Devices Inc./Maxim IntegratedAustria MicroBenchmarqCymbet CorporationDallas SemiconductorDiodes IncorporatedECS Inc.Elantec
Series
-*2-Wire™ArtasieC2C3C7C8EconoRAMLV8571ARA-4574SARA-8565SA
Packaging
BagBulkCut Tape (CT)Digi-Reel®StripTape & Reel (TR)TrayTube
Product Status
ActiveDiscontinued at Digi-KeyLast Time BuyNot For New DesignsObsolete
DigiKey Programmable
Not VerifiedVerified
Type
Binary CounterClock/CalendarClock/Calendar/SupervisorElapsed Time CounterPhantom Time ChipPortable System ControllerReal Time Clock (RTC)Temperature RecorderTime Event RecorderTimer Clock Peripheral (TCP)
Features
-AlarmAlarm, Backup Supply Charger, Leap Year, RAMAlarm, Battery Switch, Clock Output Hz-MHz, Event Input, Temperature Alarm, Timer, Trickle Charge with Charge PumpAlarm, Battery Switch, EEPROM, External Event Interrupt, Leap Year, Programmable Clock Output, RAM, Timer, Trickle ChargerAlarm, Battery Switch, Leap Year, Programmable Clock Output, Timer, Watchdog TimerAlarm, Daylight Savings, Leap Year, NVSRAM, Square Wave OutputAlarm, Daylight Savings, Leap Year, RAMAlarm, Daylight Savings, Leap Year, SRAMAlarm, Daylight Savings, Leap Year, Supervisor, Watchdog TimerAlarm, Daylight Savings, NVRAM, NVSRAM, Square Wave Output, Y2KAlarm, Daylight Savings, NVSRAM
Memory Size
1B2B2B, 43B2B, 8B3B7B8B10B16B16B, 32B31B32B
Time Format
-BinaryHH:MM:SSHH:MM:SS (12/24 hr)HH:MM:SS (24 hr)HH:MM:SS:100th (24 hr)HH:MM:SS:hhHH:MM:SS:hh (12/24 hr)HH:MM:SS:hh (24 hr)
Date Format
-BinaryYY-MM-DDYY-MM-DD-ddYYYY-MM-DD
Interface
1-Wire® and 3-Wire1-Wire® Serial2-Wire Serial3-Wire Serial3-Wire Serial, 4-Wire Serial3-Wire Serial, SPI4-Wire Serial-I2CI2C, 2-Wire SerialI2C, SerialI2C, SMBusI2C, SPIMultiplexed
Voltage - Supply
0.9V ~ 1.8V, 0.9V ~ 5.5V0.9V ~ 5.5V0.9V ~ 5.5V, 1.8V ~ 5.5V1V ~ 4.4V1V ~ 5.5V1.1V ~ 5.5V1.1V, 1.2V, 2V ~ 5.5V1.2V ~ 5.5V1.25V ~ 5.5V1.3V ~ 4.4V1.3V ~ 5.5V1.3V ~ 5.5V, 2.1V ~ 5.5V
Voltage - Supply, Battery
0.9V ~ 3.6V0.9V ~ 5.5V1V ~ 5.5V1.1V ~ 5.5V1.15V ~ 5.5V1.2V ~ 5.5V1.3V ~ 3.63V1.3V ~ 3.6V1.3V ~ 3.7V1.3V ~ 5.5V1.4V ~ 3.6V1.4V ~ 5.5V
Current - Timekeeping (Max)
0.05µA @ 2.5V ~ 5.5V0.06µA @ 2.5V ~ 5.5V0.06µA @ 3V0.08µA @ 3V0.17µA ~ 0.22µA @ 1.8V ~ 3V0.18µA @ 3V180nA @ 3V210nA @ 3V0.24µA @ 3V0.25µA @ 3V0.25µA ~ 0.27µA @ 3V ~ 5V0.25µA ~ 0.45µA @ 3V ~ 5V
Operating Temperature
-40°C ~ 105°C-40°C ~ 105°C (TA)-40°C ~ 125°C-40°C ~ 125°C (TA)-40°C ~ 85°C-40°C ~ 85°C (TA)-30°C ~ 70°C-30°C ~ 80°C-25°C ~ 70°C-20°C ~ 70°C-10°C ~ 70°C0°C ~ 70°C0°C ~ 70°C (TA)-
Mounting Type
-Surface MountSurface Mount, Wettable FlankThrough Hole
Grade
-Automotive
Qualification
-AEC-Q100AEC-Q200
Package / Case
6-SMD, J-Lead6-VBGA, FCBGA6-VFBGA, FCBGA6-WDFN Exposed Pad8-DIP (0.300", 7.62mm)8-LCC8-LSSOP (0.173", 4.40mm Width)8-SMD8-SMD, Flat Leads8-SOIC (0.154", 3.90mm Width)8-SOIC (0.173", 4.40mm Width)8-SOIC (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package
6-FlipChip (1.09x1.37)6-FlipChip (2.82x2.54)6-TDFN (3x3)6-TDFN-EP (3x3)6-TSOC8-CLCC (3.2x1.5)8-DIP8-EMP8-HSOP-E8-HVSON (4x4)8-HWSON (2x3)8-LCC (1.5x3.2)
Stocking Options
Environmental Options
Media
Marketplace Product
2,405Results

Showing
of 2,405
Mfr Part #
Quantity Available
Price
Series
Package
Product Status
DigiKey Programmable
Type
Features
Memory Size
Time Format
Date Format
Interface
Voltage - Supply
Voltage - Supply, Battery
Current - Timekeeping (Max)
Operating Temperature
Mounting Type
Grade
Qualification
Package / Case
Supplier Device Package
8-SOIC
MCP7940MT-I/SN
IC RTC CLK/CALENDAR I2C 8SOIC
Microchip Technology
3,387
In Stock
1 : $0.67000
Cut Tape (CT)
3,300 : $0.59000
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM
64B
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
-
1µA @ 5.5V
-40°C ~ 85°C
Surface Mount
-
-
8-SOIC (0.154", 3.90mm Width)
8-SOIC
8-SOIC
MCP7940N-I/SN
IC RTC CLK/CALENDAR I2C 8SOIC
Microchip Technology
7,971
In Stock
100 : $0.76000
Tube
-
Tube
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM
64B
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 85°C
Surface Mount
Automotive
AEC-Q100
8-SOIC (0.154", 3.90mm Width)
8-SOIC
8-TDFN
MCP7940MT-I/MNY
IC RTC CLK/CALENDAR I2C 8TDFN
Microchip Technology
18,960
In Stock
1 : $0.77000
Cut Tape (CT)
3,300 : $0.67500
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM
64B
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
-
1µA @ 5.5V
-40°C ~ 85°C
Surface Mount
-
-
8-WFDFN Exposed Pad
8-TDFN (2x3)
10-DFN
PCF85063ATL/1,118
IC RTC CLK/CALENDAR I2C 10DFN
NXP USA Inc.
22,287
In Stock
1 : $0.83000
Cut Tape (CT)
4,000 : $0.37824
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output
-
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
0.9V ~ 5.5V
-
0.6µA @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
10-XFDFN Exposed Pad
10-DFN (2.6x2.6)
8-SOIC
MCP7940NT-I/SN
IC RTC CLK/CALENDAR I2C 8SOIC
Microchip Technology
15,581
In Stock
1 : $0.85000
Cut Tape (CT)
3,300 : $0.76000
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM
64B
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 85°C
Surface Mount
Automotive
AEC-Q100
8-SOIC (0.154", 3.90mm Width)
8-SOIC
8-MSOP
MCP7940NT-I/MS
IC RTC CLK/CALENDAR I2C 8MSOP
Microchip Technology
28,561
In Stock
1 : $0.90000
Cut Tape (CT)
2,500 : $0.80000
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM
64B
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 85°C
Surface Mount
Automotive
AEC-Q100
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-MSOP
8-MSOP
MCP7940N-I/MS
IC RTC CLK/CALENDAR I2C 8MSOP
Microchip Technology
2,690
In Stock
1 : $0.90000
Tube
-
Tube
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM
64B
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 85°C
Surface Mount
Automotive
AEC-Q100
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-MSOP
8 SOIC
MCP7940NT-E/SN
IC RTC CLK/CALENDAR I2C 8SOIC
Microchip Technology
4,754
In Stock
1 : $0.92000
Cut Tape (CT)
3,300 : $0.81250
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM
64B
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 125°C
Surface Mount
Automotive
AEC-Q100
8-SOIC (0.154", 3.90mm Width)
8-SOIC
8-TDFN
MCP7940NT-I/MNY
IC RTC CLK/CALENDAR I2C 8TDFN
Microchip Technology
42,546
In Stock
1 : $0.95000
Cut Tape (CT)
3,300 : $0.83000
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM
64B
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 85°C
Surface Mount
Automotive
AEC-Q100
8-WFDFN Exposed Pad
8-TDFN (2x3)
8-SOIC
MCP79400T-I/SN
IC RTC CLK/CALENDAR I2C 8SOIC
Microchip Technology
3,018
In Stock
1 : $0.95000
Cut Tape (CT)
3,300 : $0.83000
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM, Unique ID
64B
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA (Typ) @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
8-SOIC (0.154", 3.90mm Width)
8-SOIC
8-MSOP
MCP7940NT-E/MS
IC RTC CLK/CALENDAR I2C 8MSOP
Microchip Technology
7,342
In Stock
1 : $0.97000
Cut Tape (CT)
2,500 : $0.85000
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM
64B
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 125°C
Surface Mount
Automotive
AEC-Q100
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-MSOP
8-MSOP
MCP79400T-I/MS
IC RTC CLK/CALENDAR I2C 8MSOP
Microchip Technology
6,091
In Stock
1 : $1.00000
Cut Tape (CT)
2,500 : $0.87000
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM, Unique ID
64B
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA (Typ) @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-MSOP
8-SOIC
MCP79410T-I/SN
IC RTC CLK/CALENDAR I2C 8SOIC
Microchip Technology
4,132
In Stock
1 : $1.04000
Cut Tape (CT)
3,300 : $0.91000
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM, Unique ID
64B, 1Kb
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
8-SOIC (0.154", 3.90mm Width)
8-SOIC
8-SOIC
MCP79410-I/SN
IC RTC CLK/CALENDAR I2C 8SOIC
Microchip Technology
4,104
In Stock
1 : $1.04000
Tube
-
Tube
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM, Unique ID
64B, 1Kb
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
8-SOIC (0.154", 3.90mm Width)
8-SOIC
8-TSSOP
MCP79410-I/ST
IC RTC CLK/CALENDAR I2C 8TSSOP
Microchip Technology
7,584
In Stock
1 : $1.08000
Tube
-
Tube
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM, Unique ID
64B, 1Kb
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
8-TSSOP (0.173", 4.40mm Width)
8-TSSOP
PCF85263ATL/AX
PCF85263ATL/AX
IC RTC CLK/CALENDAR I2C 10DFN
NXP USA Inc.
12,708
In Stock
1 : $1.12000
Cut Tape (CT)
4,000 : $0.52982
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Watchdog Timer
-
HH:MM:SS:hh (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
0.9V ~ 5.5V
0.9V ~ 5.5V
0.885µA @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
10-XFDFN Exposed Pad
10-DFN (2.6x2.6)
8-TDFN
MCP79410T-I/MNY
IC RTC CLK/CALENDAR I2C 8TDFN
Microchip Technology
23,275
In Stock
1 : $1.13000
Cut Tape (CT)
3,300 : $1.00000
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, SRAM, Unique ID
64B, 1Kb
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1.8V ~ 5.5V
1.3V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
8-WFDFN Exposed Pad
8-TDFN (2x3)
8 SOIC
PCF8563T/5,518
IC RTC CLOCK/CALENDAR I2C 8SO
NXP USA Inc.
13,856
In Stock
1 : $1.15000
Cut Tape (CT)
2,500 : $0.48800
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Watchdog Timer
-
HH:MM:SS (24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
1V ~ 5.5V
-
0.6µA ~ 0.75µA @ 2V ~ 5V
-40°C ~ 85°C
Surface Mount
-
-
8-SOIC (0.154", 3.90mm Width)
8-SO
8-SOIC
BQ32002DR
IC RTC CLK/CALENDAR I2C 8SOIC
Texas Instruments
7,093
In Stock
1 : $1.16000
Cut Tape (CT)
2,500 : $0.55803
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Leap Year, Square Wave Output
-
HH:MM:SS (24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
3V ~ 3.6V
1.4V ~ 3.6V
65µA @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
8-SOIC (0.154", 3.90mm Width)
8-SOIC
8 SOIC
PCF85263AT/AJ
IC RTC CLOCK/CALENDAR I2C 8SO
NXP USA Inc.
132,344
In Stock
1 : $1.17000
Cut Tape (CT)
2,500 : $0.56735
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Watchdog Timer
-
HH:MM:SS:hh (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
0.9V ~ 5.5V
0.9V ~ 5.5V
0.885µA @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
8-SOIC (0.154", 3.90mm Width)
8-SO
8-TSSOP
PCF85263ATT/AJ
IC RTC CLK/CALENDAR I2C 8TSSOP
NXP USA Inc.
48,594
In Stock
1 : $1.17000
Cut Tape (CT)
2,500 : $0.56735
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Watchdog Timer
-
HH:MM:SS:hh (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
0.9V ~ 5.5V
0.9V ~ 5.5V
0.885µA @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-TSSOP
10 MSOP
MCP79510-I/MS
IC RTC CLK/CALENDAR SPI 10MSOP
Microchip Technology
8,212
In Stock
1 : $1.29000
Tube
-
Tube
Active
Not Verified
Clock/Calendar
Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID
64B
HH:MM:SS:hh (12/24 hr)
YY-MM-DD-dd
SPI
1.8V ~ 3.6V
1.3V ~ 3.6V
1µA @ 1.8V ~ 3.6V
-40°C ~ 85°C
Surface Mount
-
-
10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
10-MSOP
10 MSOP
MCP79510T-I/MS
IC RTC CLK/CALENDAR SPI 10MSOP
Microchip Technology
6,615
In Stock
1 : $1.29000
Cut Tape (CT)
2,500 : $1.13000
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID
64B
HH:MM:SS:hh (12/24 hr)
YY-MM-DD-dd
SPI
1.8V ~ 3.6V
1.3V ~ 3.6V
1µA @ 1.8V ~ 3.6V
-40°C ~ 85°C
Surface Mount
-
-
10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
10-MSOP
8-TSSOP
PCF85363ATT/AJ
IC RTC CLK/CALENDAR I2C 8TSSOP
NXP USA Inc.
95,462
In Stock
1 : $1.32000
Cut Tape (CT)
2,500 : $0.57275
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Watchdog Timer
64B
HH:MM:SS:hh (12/24 hr)
YY-MM-DD-dd
I2C, 2-Wire Serial
0.9V ~ 5.5V
0.9V ~ 5.5V
0.885µA @ 3.3V
-40°C ~ 85°C
Surface Mount
-
-
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-TSSOP
16-HVQFN_SOT758-3
PCF2123BS/1,518
IC RTC CLK/CALENDAR SPI 16HVQFN
NXP USA Inc.
4,951
In Stock
1 : $1.34000
Cut Tape (CT)
6,000 : $0.63947
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, Square Wave Output, Watchdog Timer
-
HH:MM:SS (12/24 hr)
YY-MM-DD-dd
SPI
1.6V ~ 5.5V
-
0.33µA ~ 0.38µA @ 2V ~ 5V
-40°C ~ 85°C
Surface Mount
-
-
16-VFQFN Exposed Pad
16-HVQFN (3x3)
Showing
of 2,405

Real Time Clocks


Real Time Clocks (RTCs) provide time and/or date information in almost any electronic device which needs to keep accurate time. The clock types are binary counter, clock/calendar/supervisor, elapsed time counter, phantom time chip, portable system controller, temperature recorder, time event recorder, and timer clock peripheral.  They contain memory sizes ranging from 2 B to 2 MB and have interface options of I2C, Parallel, Serial, SPI, 1-Wire, 2-Wire, 3-Wire, and 4-Wire.