DS1307 Real Time Clock and Calendar

The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I2C, bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of he month date is automatically adjusted for months with fewer than 31 days, including corrections for leap
year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The DS1307 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply. Timekeeping operation continues while the part operates from the backup supply.

Downloads

• DS1307 Datasheet.

Free Tutorials

• DS1307 Based RTC Module.
• DS1307 Interface using Soft I2C.
• DS1307 Interface using Hardware I2C.