DS3231 I2C Precision Clock with AT24C32 Memory

DS3231 I2C Precision Clock with AT24C32 Memory
The DS3231 I2C precision clock module is suitable for projects that need accurate timekeeping capabilities. Typical applications include clocks and data logging devices.

SKU: SLI37488105948,CQY19592406587,WUM40470763400

Price: 0.83 $

Old Price: 1.58 $

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DS3231 is a low cost and extremely accurate I2C real-time clock, with an integrated crystal and temperature-compensated crystal oscillator (TCXO).  DS3231 can be operated using supply voltages ranging from 2.3 V to 5.5 V and it also features battery backup capabilities.

The DS3231 features an integrated crystal, 2 programmable time-of-day alarms, a temperature sensor, and 32.768 kHz signal output pin.

The AT24C32 EEPROM is a 32K EEPROM that can be used to add non-volatile data storage to your electronic projects and prototypes.

The module also features a battery holder, allowing you to add a backup battery to ensure continuous operation.


  • Can be connected directly to the microcontroller IO ports
  • Standard 2.54 mm pins for input and output connections
  • Two calendars and alarm clock
  • Two programmable square-wave outputs
  • Real time clock generator for seconds, minutes, hours, day, date, month, and year timing
  • Valid until 2100 with leap year compensation
  • Can be cascaded with other I2C devices
  • The address can be set using the pins A0/A1/A2 (the default address is 0x57)
  • Battery socket compatible with LIR2032 batteries
  • I2C interface


  • Operating voltage: 3.3 V to 5.5 V
  • Real-time clock chip: DS3231
  • Clock accuracy: 2 ppm
  • Memory chip: AT24C32 (32 Kb storage capacity)
  • On-chip temperature sensor with an accuracy of ±3 ℃
  • I2C bus interface maximum speed: 400 kHz
  • Size: 38 x 22 x 14 mm