M41T11 Datasheet, PDF (1/29 Pages) STMicroelectronics – Serial Real Time Clock with 56 Bytes of NVRAM

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)
August 2006
Rev 6
1/29
www.st.com
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