+ Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal +Century flag +Clock operating voltage: 1.0 V to 5.5V at room temperature +Low backup current; typical 0.25 μA at VDD = 3.0 V and Tamb = 25 °C +400 kHz two-wire I²C-bus interface (at VDD = 1.8 V to 5.5 V) +Programmable clock output for peripheral devices (32.768 kHz, 1.024 kHz, 32 Hz, and 1 Hz) +Alarm and timer functions +Integrated oscillator capacitor +Internal Power-On Reset (POR) +I²C-bus slave address: read A3h and write A2h +Open-drain interrupt pin

+ Status +Budgetary Price excluding tax +resolution +VDD (interface) +Stop-watch Mode +Leap Year Tracking +Watchdog timer +Programmable alarm +Countdown Timer +VDD (clock) +IDD [typ] (nA) +Ambient Operating Temperature (Min to Max) (℃)

+ 移动电话 +便携式仪器 +电子计量 +电池供电产品