Features

Ferouency Stability: +5ppm over -40T ~ +85C
Built-in 32.768 kHz crystal unit DTCXO(temperature compensated crystal oscillator)
Interface Type : 12C-Bus Interface ( 400KHz)
Calendar,alarm,timer(sec./min./hour/day/week/month/year),valid up to year 2099
Operating voltage range : 2.2V to 5.5V
Wide Timekeeper voltage range : 2.4V to 5.5V
Low backup current : 0.48pA
Power on auto switch circuit, based on vioume auto switch, on chip power voltage auto check.
Allowed chip environmental working temperature measured by on time software test, typical accuracy1°C
Operating temperature range: -40°C~+85C