DS1307 (Real Time Clock IC)

Regular price LE 20.00


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 the 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



How to Build a Real-time Clock Circuit with a DS1307 Chip


  • Real-time clock (RTC) counts seconds, minutes, hours, date of the month, month, day of the week, and year with leap-year compensation valid up to 2100¬†
  • 56-byte, battery-backed, nonvolatile (NV) RAM for data storage¬†
  • Two-wire serial interface¬†
  • Programmable square wave output signal¬†
  • Automatic power-fail detect and switch circuitry¬†
  • Consumes less than 500 nA in battery backup mode with oscillator running¬†
  • Optional industrial temperature range: -40¬įC to +85¬įC¬†
  • Available in 8-pin DIP or SOIC¬†
  • Underwriters Laboratory (UL) recognized