DS1307 TinyRTC Clock Module


Recommended for Arduino starters!

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SKU: MDU-INP-RTC-DS1307 Categories: , Tags: , , ,


The DS1307 serial real-time clock (RTC) is a lowpower, 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.


  • I2C Interface RTC IC
  • Operating voltage : 5V
  • Less than 500nA current when operating with battery
  • 56 bytes SVRAM
  • Operates in power or battery mode
  • Programmable square wave output pin



Additional information

Weight10 g
Dimensions25 × 25 × 10 mm