Description
●The M41T60 is a low power serial RTC with a built-in 32.768 kHz oscillator (external crystal controlled). Eight registers are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. Addresses and data are transferred serially via a twoline bi-directional bus. The built-in address register is increased automatically after each WRITE or READ data byte.
●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
