BRAND: Communica

I2C Real Time Clock Module DS3231SN-Chronodot V2.0. Battery CR1220 Not Included

I2C Real Time Clock Module


The DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate timekeeping when main power to the device is inter-erupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The DS3231is available in commercial and industrial temperature ranges, and is offered in a 16-pin, 300-mil SO package. The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month 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 an AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred serially through an I2C bidirectional bus. A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCCto detect power failures, to provide a reset output, and to automatically switch to the backup supply when necessary. Additionally, the RSTpin is monitored as a pushbutton input for generating a reset externally. Clock Module is programmable controllers, for science kits for kids, science projects, robot car on high school, primary school, secondary school.


  • Use DS3231SN precision clock chip, built 32.768 crystal
  • Can provide precise year, month, day, hour, minute, second, in the morning and afternoon data
  • You can output 1Hz signal, a second output signal
  • You can use the CR1220 coin cell holding travel time
  • The pull-up resistor R1 R2 own welding on the I2C bus
  • Small size : 3cm in diameter
  • Pin spacing : 22.86m
  • Color : Blue
  • Size : diameter 3cm

Additional Information

Device Clock Module
Type Battery Input | Blue | 300-mil | SO package