Real Time Clock Serial 20Byte 8-Pin SO N T/R

The M41T80 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. An additional 12 registers provide status/control of alarm, 32 KHz output, and square wave functions. Addresses and data are transferred serially via a two line, bi-directional I²C interface. The built-in address register is incremented automatically after each WRITE or READ data byte.Functions available to the user include a time-of-day clock/calendar, alarm interrupts, 32 KHz output, and programmable square wave output. The eight clock address locations contain the century, year, month, date, day, hour, minute, second and tenths/hundredths of a second in 24-hour BCD format. Corrections for 28, 29 (leap year - valid until year 2100), 30 and 31 day months are made automatically.The M41T80 is supplied in an 8-pin SOIC.

Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, 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 (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

ECOPACK® package available