M41T60_10 Datasheet, PDF (1/27 Pages) STMicroelectronics – Serial access real-time clock

Features
■ Counters for seconds, minutes, hours, day,
date, month, years, and century
■ 32 KHz crystal oscillator integrating load
capacitance and high crystal series resistance
operation
■ Oscillator stop detection monitors clock
operation
■ Serial interface supports I²C bus (400 kHz)
■ 350 nA timekeeping current at 3 V
■ Low operating current of 35 µA (at 400 kHz)
■ Timekeeping down to 1.0 V
■ 1.3 V to 4.4 V 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
M41T60
Serial access real-time clock
QFN16 (Q)
3 mm x 3 mm
VSOJ20 (47.6mm2)
GND Plane _{Guard Ring} ^(21.5mm2)
SMT
CRYSTAL
1 XI
2 XO
3
4 ST QFN16
Footprint comparison of ST’s QFN16 with
SMT crystal vs. competing VSOJ20 package
April 2010
Doc ID 10396 Rev 13
1/27
www.st.com
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