| Type Features Memory Size Time Format Date Format Interface Voltage - Supply Voltage - Supply, Battery Current - Timekeeping (Max) Operating Temperature Mounting Type Package / Case Supplier Device Package | Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS (12/24 hr) YY-MM-DD-dd I²C, 2-Wire Serial 1.8 V ~ 3.6 V 0.9 V ~ 3.6 V 0.5µA @ 1.5V -40°C ~ 85°C Surface Mount 8-UFDFN Exposed Pad 8-TDFN (2x2) |