DS1302 real-time clock module; with battery the CR2032 power-down walk

Color: Black + green Material: FR-I DS1302 main performance index The real time clock has the ability of calculating prior to the 2100 second, minute, hour, day, week, month, year, and the ability to adjust a leap year Wide working voltage: 2.0~5.5 V When The working voltage is 2.0V, the current is less than 300nA Read/write clock or RAM data have two transmission way: Single-byte / many bytes group 8 feet DIP assembly or optional 8 feet SOIC encapsulation according to surface assembly Simple 3 line interface