Voltage Supply: 2.2 V ~ 5.5 V (for RTC).
Time Format: HH: MM: SS (12/24 hr).
1 Hz output pin SQW.
Date Format: YY-MM-DD-dd.
DS 3231 based RTC with 2032 Battery Holder.
Accuracy 2 ppm from 0° C to +40° C
Accuracy 3.5 ppm from -40° C to +85° C
Digital Temp Sensor Output: ±3° C Accuracy
Memory Chips: AT24C02 (2Kbit)
Register for Aging Trim
RST Output/Pushbutton Reset Debounce Input
Two Time-of-Day Alarms
Programmable Square-Wave Output Signal
Fast 400 Khz I2C interface