M41T81SM6E Description

The M41T81SM6E is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator (external crystal controlled). 

M41T81SM6E Features

• Counters for tenths/hundredths of seconds, seconds, minutes, hours, days, dates, months, years, and century

• 32 KHz crystal oscillator with integrated load capacitance (12.5 pf) which provides exceptional oscillator stability and high crystal series resistance operation)

• Oscillator stop detection (monitors clock operation)

• Serial interface supports I²C bus (400 kHz protocol)

• Ultra-low battery supply current of 0.6 µA (type)

• 2.0 to 5.5 V clock operating voltage

• Automatic switchover and deselect circuitry (fixed reference) which provides full operation in 3.0 V applications)

• V_CC = 2.7 to 5.5 V

• 2.5 V ≤ V_PFD ≤ 2.7 V

• Power-down time-stamp (HT bit) which allows determination of time elapsed in battery backup

• Battery low flag

• Programmable alarm and interrupt function (valid even during battery backup mode)

• Accurate programmable watchdog timer (from 62.5 ms to 128 s)

• Software clock calibration (to compensate for crystal deviation due to temperature)

• Operating temperature of –40 to 85 °C

• Package options include an 8-lead SOIC or 18-lead embedded crystal SOIC

M41T81SM6E Applications

• Industrial

• General Uses