1.The 1.-40 ° C to +85 ° C temperature range, timing accuracy kept at ± 5ppm (± 0.432 sec / day)
    2 timed to provide continuous battery backup
    3 low-power
    4. Device package and function compatible with the DS3231
    5. Complete clock calendar functions include seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year       compensation
    6 two calendar alarm
    7.1Hz and 32.768kHz output
    8 Reset button debounced input and output
    9-speed (400kHz) I2C serial bus
    10. +2.3 V to +5.5 V Supply Voltage
    11 ± 3 ° C accuracy digital temperature sensor
    12.-40 ° C to +85 ° C operating temperature range
    13.16-pin SO (300mil) package
    14 by Underwriters Laboratories (UL) certification