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

PCF8523TK/1,118 IC RTC CLK/CALENDAR I2C 8HVSON NXP USA Inc.	1,396 In Stock	1 : ¥15.11000 Cut Tape (CT) 6,000 : ¥6.64878 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	Clock/Calendar	Alarm, Leap Year, Watchdog Timer	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.6V ~ 5.5V	1.8V ~ 5.5V	0.5µA @ 2V ~ 5V	-40°C ~ 85°C	Surface Mount	8-VDFN Exposed Pad	8-HVSON (4x4)
DS1307Z+ IC RTC CLK/CALENDAR I2C 8SOIC Analog Devices Inc./Maxim Integrated	5,284 In Stock 19,900 Factory	1 : ¥42.93000 Tube	-	Tube	Active	Not Verified	Clock/Calendar	Leap Year, NVSRAM, Square Wave Output	56B	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	4.5V ~ 5.5V	2V ~ 3.5V	200µA @ 5V	0°C ~ 70°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
BU9873FVM-GTTR IC RTC CLK/CALENDAR I2C 8MSOP Rohm Semiconductor	269 In Stock	1 : ¥9.69000 Cut Tape (CT) 3,000 : ¥4.10947 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Not For New Designs	Not Verified	Clock/Calendar	Alarm, Leap Year	-	HH:MM:SS (12/24 hr)	YY-MM-DD-dd	I2C, 2-Wire Serial	1.8V ~ 5.5V	-	1µA ~ 1.35µA @ 3V ~ 5.5V	-40°C ~ 85°C	Surface Mount	8-VSSOP, 8-MSOP (0.110", 2.80mm Width)	8-MSOP

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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.