Features

 For new designs use M41T00S

 Counters for seconds, minutes, hours, day,

month, years, and century

 32 kHz crystal oscillator integrating load

capacitance (12.5 pF) providing exceptional

oscillator stability and high crystal series

resistance operation

 Serial interface supports I2C bus (100 kHz

protocol)

 Ultra low battery supply current of 0.8 μA

(typ at 3 V)

 2.0 to 5.5 V clock operating voltage

 Automatic switchover and deselect circuitry

(for 3 V application select M41T00S datasheet)

 Software clock calibration to compensate

crystal deviation due to temperature

 Automatic leap year compensation

 Operating temperature of -40 to 85 °C