M41T56_07 datasheet(1/25 Pages) STMICROELECTRONICS

Part #	M41T56

Description	Serial real-time clock with 56 bytes NVRAM

PDF	25 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 25 page

December 2007

Rev 8

1/25

1

M41T56

Serial real-time clock with 56 bytes NVRAM

Features

■ Counters for seconds, minutes, hours, day,

date, month, years, and century

■ 32KHz crystal oscillator integrating load

capacitance (12.5pF) providing exceptional

oscillator stability and high crystal series

resistance operation

■ Serial interface supports I2C bus (100kHz

protocol)

■ Ultra-low battery supply current of 450nA

(typ at 3V)

■ 5V ±10% supply voltage

■ Timekeeping down to 2.5V

■ Automatic power-fail detect and switch circuitry

■ 56 bytes of general purpose RAM

■ Software clock calibration to compensate

crystal deviation due to temperature

■ Automatic leap year compensation

■ Operating temperature of –40°C to 85°C

■ Available in an 8-lead, 150mil, plastic SOIC

(SO8)

■ RoHS compliant

– Lead-free second level interconnect

8

1

SO8 (M) 150mil width

www.st.com

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