X1B000311000100

Built in frequency adjusted 32.768 kHz crystal unit Interface Type : I2C -Bus Interface voltage range : 1.6 V - 5.5 V Wide timekeeper voltage range : 1.1 V - 5.5 V Low backup current : 300 nA ( Typ. ) / 3 V Auto power switching function :Switchover by main power supply monitor Backup battery charge control function :For the rechargeable lithium batteries Reset functions with a delay:Detect a main power supply and remove the reset The various function include full calendar, alarm, timer, etc