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	Package / Case	Supplier Device Package

PCF2129AT/2,518 IC RTC CLOCK/CALENDAR I2C 20SO NXP USA Inc.	1,266 In Stock	1 : ¥49.01000 Cut Tape (CT) 2,000 : ¥24.58055 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Square Wave Output, TCXO/Crystal, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.8V ~ 4.2V	1.8V ~ 4.2V	1.5µA @ 3.3V	-40°C ~ 85°C	Surface Mount	20-SOIC (0.295", 7.50mm Width)	20-SO
DS1682S+T&R IC RTC ELAPSED CNT I2C 8SOIC Analog Devices Inc./Maxim Integrated	14,603 In Stock	1 : ¥53.85000 Cut Tape (CT) 2,500 : ¥29.42631 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Verified	Elapsed Time Counter	Alarm, EEPROM	10B	Binary	Binary	I2C, 2-Wire Serial	2.5V ~ 5.5V	-	4µA ~ 15µA @ 3V ~ 5.5V	-40°C ~ 85°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
DS1682S+ IC RTC ELAPSED CNT I2C 8SOIC Analog Devices Inc./Maxim Integrated	3,153 In Stock	1 : ¥61.16000 Tube	-	Tube	Active	Verified	Elapsed Time Counter	Alarm, EEPROM	10B	Binary	Binary	I2C, 2-Wire Serial	2.5V ~ 5.5V	-	4µA ~ 15µA @ 3V ~ 5.5V	-40°C ~ 85°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC

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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.