M41T60_05 Datasheet, PDF (1/24 Pages) STMicroelectronics – Serial access real-time clock

M41T60
Serial access real-time clock
Features summary
■ Counters for seconds, minutes, hours, day,
date, month, years, and century
■ 32kHz crystal oscillator integrating load
capacitance and high crystal series resistance
operation
■ Oscillator stop detection monitors clock
operation
■ Serial interface supports I²C bus (400kHz)
■ 350nA timekeeping current @ 3V
■ Low operating current of 35µA (@400KHz)
■ Timekeeping down to 1.0V
■ 1.3V to 4.4V I²C bus operating voltage
■ Software clock calibration to compensate
deviation of crystal due to temperature
■ Software programmable output (OUT)
■ Operating temperature of –40 to 85°C
■ Automatic leap year compensation
■ Lead-free 16-pin QFN package
■ Li ION rechargeable operation
QFN16 (Q)
3mm x 3mm
32KHz Crystal + QFN16 vs. VSOJ20
VSOJ20 (47.6mm2)
GND Plane _{Guard Ring} ^(21.5mm2)
SMT
CRYSTAL
1 XI
2 XO
3
4 ST QFN16
AI11107
July 2006
Rev 11
1/24
www.st.com
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