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DS3231 AT24C32 IIC Precision RTC Real Time Clock Memory Module for Arduino - NA041

DS3231 AT24C32 IIC Precision RTC Real Time Clock Memory Module for Arduino - NA041


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  • Operating Voltage: 2.7~5. 5 V
  • Clock chip: high precision clock chip DS3231
  • Accuracy 5 hours: range 0-40 °, accuracy 2ppm, the error was about 1 minute
  • Calendar alarm clocks with two
  • Programmable square waves


DS3231 RTC is a Precise Real-Time Clock Module with a 32Kbit EEPROM and a built-in 10-bit temperature sensor having a resolution of 0.25C. The DS3231 RTC module Precise Real-Time Clock Module 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 the 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 Arduino is available in commercial and industrial temperature ranges and is offered in a 16-pin, 300-mil SO package.


Operating Voltage Range

2.7V ~ 5.5V (including 24C32)

Voltage Supply for RTC

2.2 V ~ 5.5 V


±2ppm from 0°C to +40°C
±3.5ppm from -40°C to +85°C

Battery Holder

2032 Coin Battery

I2C interface

Fast (400kHz) I2C Interface


AT24C32 32Kbit Serial I2C

Time and Date Format

Time: HH: MM: SS (12/24 hr)
Date Format: YY-MM-DD-dd

Operating Temperature Range

Commercial (0°C to +70°C)
Industrial (-40°C to +85°C)

Digital Temp Sensor Output

10 bit, ±3°C Accuracy and 0.25C resolution


  • Two Time-of-Day Alarms.
  • Digital Temp Sensor Output.
  • Register for Aging Trim.
  • DS3231 RTC with 2032 Battery Holder.
  • 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.
  • Configurable I2C device Address for AT24C32 using SMD jumpers on PCB (A0, A1, A2).
  • Programmable Square-Wave Output Signal.
  • Battery-Backup Input for Continuous Timekeeping.
  • Low Power Operation Extends Battery-Backup Run Time.

Package Included:

1 x DS3231 AT24C32 IIC Precision RTC Real Time Clock Memory Module