M41T0M6E Datasheet PDF - ETC

●[

●STMicroelectronics

●]

●Description

●The M41T0 real-time clock is a low power serial real-time clock 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 two-line bidirectional bus. The built-in address register is incremented 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 (12.5 pF) providing exceptional oscillator stability and high crystal series resistance operation

●■ Oscillator stop detection monitors clock operation

●■ Serial interface supports I2C bus (400 kHz protocol)

●■ Low standby current 0.9 µA (typ at 3 V)

●■ 2.0 to 5.5 V clock operating voltage

●■ Special software programmable output

●■ Software clock calibration to compensate crystal deviation due to temperature

●■ Operating temperature of –40 to 85°C