DS3231 is an "Extremely Accurate I²C-Integrated RTC/TCXO/Crystal". This is the most precise Real Time Clock (RTC) you can get in a small, low power module. A 32.768kHz timing crystal is inside the chip!
With a button cell plugged into the back, you can get years of precision timekeeping, even when main power is lost. Great for datalogging and clocks, or anything need to really know the time.

Default I2C address: 0x57


  • Power: 3.3 to 5.5v
  • DS3231 high precision clock chip
  • AT24C32 memory chips (32K storage capacity)
  • 2 calendar alarm clock
  • IIC interface that can be cascaded to other I2C devices
  • Internal precision 32.768KHz TCXO error within the range of 0 ° C to 40 ° C 2ppm, the annual error of about 1 min.
  • internal temperature sensor accuracy 3 ° C, resolution of 0.5 ° C to measure the ambient temperature
  • programmable square wave output
  • Dimensions: 38(L) x 22(W) x 14(H) mm

DS3231 Precise Real time clock with 24C32 32K memory I2C for arduino RasPberry

  • Product Code: DS3231
  • Availability: In Stock
  • $2.39