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

AB1815-T3 IC RTC CLK/CALENDAR SPI 16QFN Abracon LLC	49,842 In Stock	1 : ¥17.60000 Cut Tape (CT) 3,000 : ¥8.03481 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)
AB1805-T3 IC RTC CLK/CALENDAR I2C 16QFN Abracon LLC	11,227 In Stock	1 : ¥18.23000 Cut Tape (CT) 3,000 : ¥8.35906 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	I2C, 2-Wire Serial	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)

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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.