M41T81M6 查看數據表（PDF） - STMicroelectronics

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M41T81M6

Serial access real-time clock with alarm

STMicroelectronics 

M41T81

Serial access real-time clock with alarm

Not recommended for new design

Features

■ For all new designs other than automotive, use

M41T81S (contact the ST sales office for

automotive grade)

■ Counters for tenths/hundredths of seconds,

seconds, minutes, hours, day, date, month,

year, and century

■ 32 KHz crystal oscillator integrating load

capacitance (12.5 pF) providing exceptional

oscillator stability and high crystal series

resistance operation

■ Serial interface supports I2C bus (400 kHz

protocol)

■ Ultra-low battery supply current of 0.6 µA

(typ at 3 V)

■ 2.0 to 5.5 V clock operating voltage

■ Automatic switch-over and deselect circuitry

(for 3 V application select M41T81S datasheet)

■ Power-down time stamp (HT bit) allowing

determination of time elapsed in battery

backup

■ Programmable alarm and interrupt function

(valid even during battery backup mode)

■ Accurate programmable watchdog timer (from

62.5 ms to 128 s)

■ Software clock calibration to compensate

crystal deviation due to temperature

■ Operating temperature of –40 to 85 °C

■ ECOPACK® package available

8

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SO8 (M)

8-pin SOIC

June 2010

Doc ID 7529 Rev 10

This is information on a product still in production but not recommended for new designs.

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