STMicroelectronics M41T80M6F

Description
The STM41T80 is a serial access real-time clock with alarm. It features counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century. It integrates a 32 KHz crystal oscillator with load capacitance, providing exceptional oscillator stability and high crystal series resistance operation. The serial interface supports the I²C bus (400 kHz).

Features
Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
32 KHz crystal oscillator with integrated load capacitance (12.5 pF)
Serial interface supports I²C bus (400 kHz)
2.0 to 5.5 V clock operating voltage
32 KHz square wave on power-up to drive a microcontroller in low-power mode
Programmable (1 Hz to 32 KHz) square wave
Programmable alarm and interrupt function
Low operating current of 200 μA
Operating temperature of -40 to 85 °C
COPACK® package available
227SO8 8-pin SOIC

Applications
Timekeeping in electronic devices
Alarm and timer functions
Data logging and timestamping
Microcontroller clock source
Low-power applications