DS3231 AT24C32 IIC Module


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Detail about DS3231 AT24C32 IIC Module

This is a module made using DS3231 RTC and AT24C32 EEPROM. DS3231 is an extremely accurate, low cost I2C RTC with integrated temperature compensated crystal oscillator. It also has a built in comparator which monitors the status of VCC to detect power failures and to automatically switch to backup power supply. AT24C32 provides 32,768 bits of serial EEPROM organized as 4096 words of 8 bits each. This gives you 32Kb of non-volatile memory for your projects. This module can be easily interfaced with Arduino Boards, Raspberry Pi and all Microcontrollers.

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 interrupted. 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 DS3231 is 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 VCC to detect power failures, to provide a reset output, and to automatically switch to the backup supply when necessary. Additionally, the RST pin is monitored as a pushbutton input for generating a μP reset.


  • Working voltage: 3.3~5 .5V
  • Fast 400KHz I2C Interface
  • Clock chip: high-precision clock chip DS3231
  • Color : Blue
  • With output TTL level signal indication
  • Can be connected directly to the microcontroller output IO port
  • Anti-interference ability
  • Connect the microcontroller to achieve the touch switch function
  • The standard 2.54mm pin to do input and output connections
  • Surrounded by a fixed mounting holes
  • Module parameters: Size: 38mm (l) x 22mm (W) x 14mm (h); 
  • Clock Accuracy: 0~40 range
  • The accuracy 2ppm, the error is about 1 minute
  • With two calendar alarm clock
  • Weight: 0.28 oz (8 g)


  • Highly Accurate RTC Completely Manages All Timekeeping Functions
  • Real-Time Clock Counts Seconds, Minutes, Hours,
  • Date of the Month, Month, Day of the Week, and
  • Year, with Leap-Year Compensation Valid Up to 2100 • Accuracy ±2ppm from 0°C to +40°C
  • Accuracy ±3.5ppm from -40°C to +85°C
  • Digital Temp Sensor Output: ±3°C Accuracy
  • Register for Aging Trim
  • RST Output/Pushbutton Reset Debounce Input
  • Two Time-of-Day Alarms
  • Programmable Square-Wave Output Signal
  • Simple Serial Interface Connects to Most Microcontrollers 2
  • Fast (400kHz) I C Interface
  • Battery-Backup Input for Continuous Timekeeping
  • Low Power Operation Extends Battery-Backup Run Time
  • 3.3V Operation
  • Operating Temperature Ranges: Commercial (0°C to +70°C) and Industrial (-40°C to +85°C)
  • Underwriters Laboratories® (UL) Recognized


  • Servers
  • Telematics
  • Utility Power Meters 
  • GPS


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DS3231 AT24C32 IIC Module

DS3231 AT24C32 IIC Module

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