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M41T62, M41T63 M41T64, M41T65
Serial Access Real-Time Clock with Alarms
Feature summary
■ Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, 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 (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
■ 32KHz square wave on power-up to drive a microcontroller in low power mode (M41T62/63/64)
■ Programmable (1Hz to 32KHz) square wave (M41T6...