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M41T81S - Serial access real-time clock

General Description

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9 2-wire bus characteristics

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Key Features

  • Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century.
  • 32 KHz crystal oscillator with integrated load capacitance (12.5 pf) which provides exceptional oscillator stability and high crystal series resistance operation).
  • Oscillator stop detection (monitors clock operation).
  • Serial interface supports I2C bus (400 kHz protocol).
  • Ultra-low battery supply current of 0.6 µA (typ).
  • 2.0 to 5.5 V clock operating voltage.

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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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M41T81S Serial access real-time clock (RTC) with alarms Features ■ Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century ■ 32 KHz crystal oscillator with integrated load capacitance (12.5 pf) which provides exceptional oscillator stability and high crystal series resistance operation) ■ Oscillator stop detection (monitors clock operation) ■ Serial interface supports I2C bus (400 kHz protocol) ■ Ultra-low battery supply current of 0.6 µA (typ) ■ 2.0 to 5.5 V clock operating voltage ■ Automatic switchover and deselect circuitry (fixed reference) which provides full operation in 3.0 V applications) ■ VCC = 2.7 to 5.5 V ■ 2.5 V ≤ VPFD ≤ 2.