- DS1307: IC số Clock/Timer, Kiểu chân: DIP(8); Hãng: Dallas; RTC Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the week, Year up to 2100 , 56 NVSRAM bytes, I2C Serial Interface, VCC = 4.5 - 5.5V, VBAT = 2 - 3.5V.
- DS1307z: IC số CLock/Timer, Kiểu chân: SOIC(8); Hãng: Dallas; RTC Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the week, Year up to 2100 , 56 NVSRAM bytes, I2C Serial Interface, VCC = 4.5 - 5.5V, VBAT = 2 - 3.5V.