Real Time Clock Module

This real time clock module with battery backup (for allows you to keep very accurate time in your project. It interfaces via I2C protocol and reports hours,minutes,seconds, the current date and support leap years.


Not currently available

Our Code: MCU-60084

Supplier Link: [SparkFun MPN:BOB-12708]


This a custom designed module for the DS1307 Real Time Clock. The module comes fully assembled and pre-programmed with the current time (ok, so it's SparkFun's time - MST - Colarado USA). The included Lithium coin cell battery (CR1225 41mAh) will run the module for a minimum of 9 years (17 years typical) without external 5V power. The DS1307 is accessed via the I2C protocol. SparkFun have written a test-bed to program the modules. This test-bed code should give you some insight on how to interface the module to any microcontroller using our example software I2C and BCD routines.


  • Two wire I2C interface
  • Hour : Minutes : Seconds AM/PM
  • Day Month, Date - Year
  • Leap year compensation
  • Accurate calendar up to year 2100
  • Battery backup included
  • 1Hz output pin
  • 56 Bytes of Non-volatile memory available to user

Dimensions: 0.75x0.75" (20x20mm)




Related Products