| Enhanced Second Source for the ST M41T00 Fast (400kHz) I2C Interface Software Clock Calibration RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year Automatic Power-Fail Detect and Switch Circuitry Trickle-Charge Capability Low Timekeeping Voltage Down to 1.3V Three Operating Voltage Ranges (1.8V, 3V, and 3.3V) Oscillator Stop Flag Available in 8-Pin µSOP or SO Packages Underwriters Laboratory (UL) Recognized |