DS3231 RTC Module


Package Includes

  • 1x DS3231 RTC Module
  • Battery not included

Availability: 13 in stock

Features / Specs

  • RTC Chip: Maxim DS3231
  • Comms Interface: I2C (Up to 400kHz) with selectable address jumpers
  • Accuracy: ±2ppm from 0°C to +40°C / ±3.5ppm from -40°C to +85°C
  • Integrated TCXO (Temperature compensated crystal oscillator) and crystal
  • Embedded digital temperature sensor with an accuracy of ±3°C
  • Two Time-of-Day Alarms
  • Programmable Square-Wave Output Signal
  • EEPROM Chip: AT24C32 (32Kbyte)
  • Module Operating Voltage: 3.3 – 5.5VDC
  • Compatible Battery: 2032
  • Dimensions: ~(39mm x 23mm x 14mm)

Pin Description

  • 32K-> Open-drain 32KHz Output
  • SQW-> Open-drain Active Low Interrupt or Square Wave Output
  • SCL-> I2C Clock
  • SDA-> I2C Data
  • VCC-> Supply Voltage (3.3 – 5.5VDC)
  • GND-> Ground


  • If using a non-rechargeable CR2032 battery, desolder the diode connected to the positive pin of the battery to disable the charge circuit
  • If using a rechargeable LIR2032 battery, supply voltage should not exceed 4.6VDC for safe use of battery charge circuit


Scroll to Top