Real Time Clocks

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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
MCP7940MT-I/SN IC RTC CLK/CALENDAR I2C 8SOIC Microchip Technology	3 266 In Stock	1 : R11,26000 Cut Tape (CT) 3 300 : R9,91436 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
PCF85063ATL/1,118 IC RTC CLK/CALENDAR I2C 10DFN NXP USA Inc.	57 260 In Stock	1 : R12,60000 Cut Tape (CT) 4 000 : R5,71580 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)
MCP7940MT-I/MNY IC RTC CLK/CALENDAR I2C 8TDFN Microchip Technology	18 090 In Stock	1 : R12,94000 Cut Tape (CT) 3 300 : R11,34270 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)
MCP7940NT-I/SN IC RTC CLK/CALENDAR I2C 8SOIC Microchip Technology	17 810 In Stock	1 : R14,28000 Cut Tape (CT) 3 300 : R12,77109 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
MCP7940N-I/SN IC RTC CLK/CALENDAR I2C 8SOIC Microchip Technology	16 863 In Stock	1 : R14,28000 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
MCP7940NT-I/MS IC RTC CLK/CALENDAR I2C 8MSOP Microchip Technology	14 897 In Stock	1 : R15,12000 Cut Tape (CT) 2 500 : R13,44320 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
MCP7940N-I/MS IC RTC CLK/CALENDAR I2C 8MSOP Microchip Technology	1 494 In Stock	1 : R15,12000 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
PCF85063TP/1Z IC RTC CLK/CALENDAR I2C 8HWSON NXP USA Inc.	7 248 In Stock	1 : R15,46000 Cut Tape (CT) 4 000 : R7,12523 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)
MCP7940NT-I/MNY IC RTC CLK/CALENDAR I2C 8TDFN Microchip Technology	14 073 In Stock	1 : R15,96000 Cut Tape (CT) 3 300 : R13,94737 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)
PCF85063AT/AY IC RTC CLOCK/CALENDAR I2C 8SO NXP USA Inc.	30 282 In Stock	1 : R16,13000 Cut Tape (CT) 2 500 : R7,58741 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
PCF85063ATT/AJ IC RTC CLK/CALENDAR I2C 8TSSOP NXP USA Inc.	17 494 In Stock	1 : R16,30000 Cut Tape (CT) 2 500 : R7,66040 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
MCP7940NT-E/MS IC RTC CLK/CALENDAR I2C 8MSOP Microchip Technology	3 589 In Stock	1 : R16,30000 Cut Tape (CT) 2 500 : R14,28340 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
MCP79410T-I/SN IC RTC CLK/CALENDAR I2C 8SOIC Microchip Technology	24 920 In Stock	1 : R17,48000 Cut Tape (CT) 3 300 : R15,29164 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
MCP79410-I/SN IC RTC CLK/CALENDAR I2C 8SOIC Microchip Technology	8 477 In Stock	1 : R17,48000 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
MCP79410T-I/MS IC RTC CLK/CALENDAR I2C 8MSOP Microchip Technology	8 099 In Stock	1 : R18,15000 Cut Tape (CT) 2 500 : R16,17385 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
MCP79410-I/MS IC RTC CLK/CALENDAR I2C 8MSOP Microchip Technology	2 488 In Stock	1 : R18,15000 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
PCF8563T/5,518 IC RTC CLOCK/CALENDAR I2C 8SO NXP USA Inc.	14 073 In Stock	1 : R18,32000 Cut Tape (CT) 2 500 : R8,78022 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
MCP79410T-I/MNY IC RTC CLK/CALENDAR I2C 8TDFN Microchip Technology	11 001 In Stock	1 : R18,99000 Cut Tape (CT) 3 300 : R16,80400 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)
MCP79412T-I/SN IC RTC CLK/CALENDAR I2C 8SOIC Microchip Technology	3 458 In Stock	1 : R18,99000 Cut Tape (CT) 3 300 : R16,80400 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
PCF85263ATL/AX IC RTC CLK/CALENDAR I2C 10DFN NXP USA Inc.	57 069 In Stock	1 : R19,83000 Cut Tape (CT) 4 000 : R9,34819 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)
MCP79411-I/MS IC RTC CLK/CALENDAR I2C 8MSOP Microchip Technology	6 841 In Stock	1 : R19,83000 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
PCF85263ATT/AJ IC RTC CLK/CALENDAR I2C 8TSSOP NXP USA Inc.	22 578 In Stock	1 : R20,67000 Cut Tape (CT) 2 500 : R10,01041 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
PCF85263AT/AJ IC RTC CLOCK/CALENDAR I2C 8SO NXP USA Inc.	1 367 In Stock	1 : R20,67000 Cut Tape (CT) 2 500 : R10,01041 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
MCP79510T-I/MS IC RTC CLK/CALENDAR SPI 10MSOP Microchip Technology	6 156 In Stock	1 : R21,68000 Cut Tape (CT) 2 500 : R18,98859 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
MCP79510-I/MS IC RTC CLK/CALENDAR SPI 10MSOP Microchip Technology	4 038 In Stock	1 : R21,68000 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

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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.

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Real Time Clocks

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