Description
The M41T00CAP is a low-power serial real-time clock (RTC) with integral battery and crystal in ST’s 24-pin CAPHAT™ package. It includes a crystal controlled, 32.768 kHz oscillator and has a built-in power sense circuit which detects power failures and automatically switches to the backup battery when a power failure occurs.

Features
■ Real-time clock (RTC) with backup battery integrated into package
■ Uses M41T00S enhanced RTC with precision switchover reference
■ 400 kHz I2C serial interface
■ Automatic switchover and deselect circuitry with fixed reference voltage
    – VCC = 2.7 to 5.5 V operating voltage range
    – 2.6 V (typ) power-fail deselect (switchover) threshold
■ Counters for seconds, minutes, hours, day, date, month, year and century
■ Software clock calibration
■ Low operating current of 300 µA
■ Oscillator stop detection
■ Battery backup
■ Operating temperature of 0 to 70 °C
■ Self-contained battery and crystal in CAPHAT™ DIP package
■ RoHS compliant
    – Lead-free second level interconnect