M4T28-BR12SH datasheet(1/29 Pages) STMICROELECTRONICS

Teilenummer	M4T28-BR12SH

Bauteilbeschribung	Serial Real Time Clock with 56 Bytes of NVRAM

PDF	29 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 29 page

August 2006

Rev 6

1/29

1

M41T11

Serial Real Time Clock with 56 Bytes of NVRAM

Feature summary

■

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 0.8µA

(typ@3V)

■

2.0 to 5.5V clock operating voltage

■

Automatic switch-over and deselect 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 to 85°C

■

Packaging includes a 28-Lead SOIC and

SNAPHAT® TOP (to be ordered separately;

3.3V to 5.0V supply voltage only)

8

1

SO8 (M)

SNAPHAT (SH) Battery & Crystal

28

1

SOH28 (MH)

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