DS1340 Datasheet (Maxim Integrated Products)

DS1340, I2C RTC

The DS1340 is a real-time clock (RTC)/calendar that is pin compatible and functionally equivalent to the ST M41T00, including the software clock calibration.

The device additionally provides trickle-charge capability on the VBACKUP pin, a lower timekeeping voltage, and an oscillator STOP flag.

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DS1340 Features

* Enhanced Second Source for the ST M41T00

* Completely Manages All Timekeeping Functions

* RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year

* Software Clock Calibration

* Oscillator Stop Flag

* Low-Power Operation Extends Battery Backup