DS3231 RTC Real Time Clock Module


4 in stock

SKU: DS3231 RTC Real Time Clock Category:


DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC), with an integrated temperature-compensated crystal oscillator (TCXO) and crystal.

Back up battery not included.

The device incorporates a battery backup, disconnect the main power supply and maintains accurate timekeeping.

Integrated oscillator improve long-term accuracy of the device and reduces the number of components of the production line.

The DS3231 is available in commercial and industrial temperature ranges, using a 16-pin 300mil SO package.

RTC maintains seconds, minutes, hours, day, date, month, and year information.

Less than 31 days of the month, the end date will be automatically adjusted, including corrections for leap year.

The clock operates in either the 24 hours or band / AM / PM indication of the 12-hour format.

Provides two configurable alarm clock and a calendar can be set to a square wave output.

Address and data are transferred serially through an I2C bidirectional bus.

A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, provide a reset output, and if necessary, automatically switch to the backup power supply, in addition, / RST pin is monitored as generating μP reset manually.

On-chip power supply control circuit can automatically detect and manage the main and standby power (i.e., low-voltage battery) to switch between the power supply.


  • Operating voltage – 3.3 – 5 .5 V
  • Clock chip – high precision clock chip DS3231
  • Clock Accuracy – 0-40 ℃ range, the accuracy 2ppm, the error was about 1 minute
  • Calendar alarm clock
  • Programmable square wave output
  • Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation
  • Chip temperature sensor comes with an accuracy of ± 3 ℃
  • Memory chips – AT24C32 (storage capacity 32K)
  • IIC bus interface the maximum transmission speed of 400KHz (working voltage of 5V)
  • Can be cascaded with other IIC device 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57
  • With battery backup to ensure the time is correct after power failure
  • Size: 38mm (length) * 22mm (W) * 14mm (height)

Additional information