M41T81S Datasheet | STMicroelectronics

Serial access real-time clock (RTC) with alarms 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) 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 (typ) - 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) - VCC = 2.7 to 5.5 V - 2.5 V ≤ VPFD ≤ 2.7 V -...