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DS1340 Datasheet I2C RTC

Manufacturer: Maxim Integrated (now Analog Devices)

General Description

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.

Block access of the register map is identical to the ST device.

Overview

DS1340 I2C RTC with Trickle Charger General.

Key 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 Run Time.
  • Low Timekeeping Voltage Down to 1.3V.
  • Automatic Power-Fail Detect and Switch Circuitry.
  • Trickle-Charge Capability.
  • Three Operating Voltage Ranges (1.8V, 3.