Real Time Clocks

Results: 2,356
Manufacturer
ABLIC Inc.Abracon LLCAmbiq Micro, Inc.ams-OSRAM USA INC.Analog Devices Inc./Maxim IntegratedBenchmarqCymbet CorporationDallas SemiconductorDiodes IncorporatedECS Inc.ElantecEM Microelectronic
Series
-*2-Wire™ArtasieEconoRAMLV8571ARA-4574SARA-8565SARTC-4543SARTC-4543SBRTC-4574JERTC-4574NB
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:SS (12/24 hr)HH:MM:SS (24 hr)HH:MM:SSHH:MM:SS:100th (24 hr)HH:MM:SS:hh (12/24 hr)HH:MM:SS:hh (24 hr)HH:MM:SS:hh
Date Format
-BinaryYY-MM-DDYY-MM-DD-ddYYYY-MM-DD
Interface
1-Wire® Serial1-Wire® and 3-Wire2-Wire Serial3-Wire Serial3-Wire Serial, 4-Wire Serial3-Wire Serial, SPI4-Wire Serial-I2CI2C, 2-Wire SerialI2C, SMBusI2C, SPII2C, SerialMultiplexed
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 ~ 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 ~ 5.5V1.5V ~ 3.6V
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 (TA)-40°C ~ 105°C-40°C ~ 125°C (TA)-40°C ~ 125°C-40°C ~ 85°C (TA)-40°C ~ 85°C-30°C ~ 70°C-30°C ~ 80°C-25°C ~ 70°C-20°C ~ 70°C-10°C ~ 70°C0°C ~ 70°C (TA)0°C ~ 70°C-
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-SOIC (0.154", 3.90mm Width)8-SOIC (0.173", 4.40mm Width) Exposed Pad8-SOIC (0.173", 4.40mm Width)8-SOIC (0.209", 5.30mm Width)
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
2,356Results

Showing
of 2,356
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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
4,928
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
7,176
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-SOIC
MCP7940NT-I/SN
IC RTC CLK/CALENDAR I2C 8SOIC
Microchip Technology
28,833
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
33,477
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-TSSOP
MCP7940NT-I/ST
IC RTC CLK/CALENDAR I2C 8TSSOP
Microchip Technology
5,445
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
1.5V ~ 5.5V
1.2µA @ 3.3V
-40°C ~ 85°C
Surface Mount
Automotive
AEC-Q100
8-TSSOP (0.173", 4.40mm Width)
8-TSSOP
8-TSSOP
MCP7940N-I/ST
IC RTC CLK/CALENDAR I2C 8TSSOP
Microchip Technology
2,486
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 (0.173", 4.40mm Width)
8-TSSOP
10-DFN
PCF85063ATL/1,118
IC RTC CLK/CALENDAR I2C 10DFN
NXP USA Inc.
45,064
In Stock
1 : $0.95000
Cut Tape (CT)
4,000 : $0.40327
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-TDFN
MCP7940NT-I/MNY
IC RTC CLK/CALENDAR I2C 8TDFN
Microchip Technology
2,495
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-MSOP
MCP79400T-I/MS
IC RTC CLK/CALENDAR I2C 8MSOP
Microchip Technology
8,438
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
PCF85063AT/AY
IC RTC CLOCK/CALENDAR I2C 8SO
NXP USA Inc.
82,923
In Stock
1 : $1.01000
Cut Tape (CT)
2,500 : $0.42830
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
-
-
8-SOIC (0.154", 3.90mm Width)
8-SO
8-TSSOP
PCF85063ATT/AJ
IC RTC CLK/CALENDAR I2C 8TSSOP
NXP USA Inc.
51,551
In Stock
1 : $1.02000
Cut Tape (CT)
2,500 : $0.43254
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
-
-
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-TSSOP
8-HWSON
PCF85063TP/1Z
IC RTC CLK/CALENDAR I2C 8HWSON
NXP USA Inc.
49,194
In Stock
1 : $1.02000
Cut Tape (CT)
4,000 : $0.43254
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
-
-
8-WFDFN Exposed Pad
8-HWSON (2x3)
8-SOIC
MCP79410T-I/SN
IC RTC CLK/CALENDAR I2C 8SOIC
Microchip Technology
7,929
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
2,110
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-MSOP
MCP79410T-I/MS
IC RTC CLK/CALENDAR I2C 8MSOP
Microchip Technology
13,578
In Stock
1 : $1.08000
Cut Tape (CT)
2,500 : $0.96250
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-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-MSOP
8 SOIC
PCF8563T/5,518
IC RTC CLOCK/CALENDAR I2C 8SO
NXP USA Inc.
3,307
In Stock
1 : $1.15000
Cut Tape (CT)
2,500 : $0.48783
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-MSOP
MCP79411-I/MS
IC RTC CLK/CALENDAR I2C 8MSOP
Microchip Technology
2,454
In Stock
1 : $1.18000
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, 8-MSOP (0.118", 3.00mm Width)
8-MSOP
10-DFN
PCF85263ATL/AX
IC RTC CLK/CALENDAR I2C 10DFN
NXP USA Inc.
43,886
In Stock
1 : $1.27000
Cut Tape (CT)
4,000 : $0.54015
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)
10 MSOP
MCP79510-I/MS
IC RTC CLK/CALENDAR SPI 10MSOP
Microchip Technology
10,948
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
10,560
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 SOIC
PCF85263AT/AJ
IC RTC CLOCK/CALENDAR I2C 8SO
NXP USA Inc.
135,133
In Stock
1 : $1.34000
Cut Tape (CT)
2,500 : $0.56956
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.
63,000
In Stock
1 : $1.34000
Cut Tape (CT)
2,500 : $0.56956
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
MCP79511-I/MS
IC RTC CLK/CALENDAR SPI 10MSOP
Microchip Technology
1,700
In Stock
1 : $1.39000
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
16-QFN
AB0815-T3
IC RTC CLK/CALENDAR SPI 16QFN
Abracon LLC
118,124
In Stock
1 : $1.46000
Cut Tape (CT)
3,000 : $0.87403
Tape & Reel (TR)
-
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
Not Verified
Clock/Calendar
Alarm, Leap Year, SRAM, Trickle-Charger, Watchdog Timer
256B
HH:MM:SS:hh
YY-MM-DD-dd
SPI
1.7V ~ 3.6V
1.5V ~ 3.6V
0.17µA ~ 0.22µA @ 1.8V ~ 3V
-40°C ~ 85°C
Surface Mount
-
-
16-VFQFN Exposed Pad
16-QFN (3x3)
14-TSSOP
PCF2123TS/1,118
IC RTC CLK/CALENDAR SPI 14TSSOP
NXP USA Inc.
29,033
In Stock
1 : $1.49000
Cut Tape (CT)
2,500 : $0.68175
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
-
-
14-TSSOP (0.173", 4.40mm Width)
14-TSSOP
Showing
of 2,356

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.