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M41T62 - Low-power serial real-time clocks

General Description

The M41T6x is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator.

Eight registers are used for the clock/calendar function and are configured in binary-coded decimal (BCD) format.

Key Features

  • Serial real-time clock (RTC) with alarm functions.
  • 400 kHz I²C serial interface.
  • Memory mapped registers for seconds, minutes, hours, day, date, month, year, and century.
  • Tenths/hundredths of second register.
  • 350 nA timekeeping current at 3 V.
  • Time keeping down to 1.0 V.
  • 1.3 V to 4.4 V I²C bus operating voltage.
  • 4.4 V max. VCC suitable for lithium-ion battery operation.
  • Low operating current of 35 µA (at 400 kHz I².

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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M41T62, M41T64, M41T65 Datasheet Low-power serial real-time clocks (RTCs) with alarm 3mm 3mm QFN16 3 x 3 mm 1.5 mm 3.2 mm Embedded crystal LCC8 1.5 x 3.2 mm No external crystal required Maturity status link M41T62 M41T64 M41T65 Features • Serial real-time clock (RTC) with alarm functions – 400 kHz I²C serial interface – Memory mapped registers for seconds, minutes, hours, day, date, month, year, and century – Tenths/hundredths of second register • 350 nA timekeeping current at 3 V • Time keeping down to 1.0 V • 1.3 V to 4.4 V I²C bus operating voltage – 4.4 V max. VCC suitable for lithium-ion battery operation • Low operating current of 35 µA (at 400 kHz I²C speed) • 32 kHz square wave output is on at power-up. Suitable for driving a microcontroller in low-power mode.