DS3231 RTC Module Precise Real Time Clock I2C AT24C32

(24 customer reviews)

In stock

SKU: 11496
  1. 1 Hz output pin SQW.
  2. 32 KHz output pin 32K.
  3. Voltage Supply: 2.2 V ~ 5.5 V (for RTC).
  4. Time Format: HH: MM: SS (12/24 hr).
  5. Date Format: YY-MM-DD-dd.
  6. DS 3231 based RTC with 2032 Battery Holder.


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Brand: Generic
Category: RTC Module
Tags: DS3231, DS3231 RTC

DS3231 RTC  is a Precise Real-Time Clock Module with 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.

For more details about the IC, the DS 3231 datasheet is attached.

Connection Diagram:

Generic Ds3231Sm Rtc 1


  1. Two Time-of-Day Alarms.
  2. Digital Temp Sensor Output.
  3. Register for Aging Trim.
  4. DS 3231 RTC with 2032 Battery Holder.
  5. Highly Accurate RTC Completely Manages All Timekeeping Functions.
  6. 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.
  7. Configurable I2C device Address for AT24C32 using SMD jumpers on PCB (A0, A1, A2).
  8. Programmable Square-Wave Output Signal.
  9. Battery-Backup Input for Continuous Timekeeping.
  10. Low Power Operation Extends Battery-Backup Run Time.

Package Includes :

1 x DS3231 Precise Real-Time Clock Module Memory Module

SKU: 11496 Category: Tags: ,
Operating Voltage (VDC)

2.7 ~ 5.5

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 (°C):

-40 to 85

Digital Temp Sensor Output

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

Dimensions in mm (LxWxH)

38 x 22 x 14

Weight (g):


Shipping Weight 0.012 kg
Shipping Dimensions 12 × 8 × 5 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

Based on 24 reviews

4.5 overall

Add a review

  1. Raj

    working perfect


  2. Vishnu (verified owner)

    Nice Product…. works as described
    The package also includes battery.


  3. Invento FIRE

    its amazing

    Invento FIRE

  4. KG Manoharan (verified owner)

    Quick delivery. Product quality is good. You may offer without battery also.

    KG Manoharan

  5. Balaji (verified owner)

    Very good reliable product…


  6. Parvathakannan Kumarasamy (verified owner)

    I have bought 2 units and they both came with dead batteries. Took some to figure it since it reads 3.3 volts perfectly. I strongly advice people to change the battery and avoid some headaches.

    Parvathakannan Kumarasamy

  7. Manjot Singh (verified owner)

    The charging circuit is a blot on an otherwise excellent product.

    Manjot Singh

  8. anilraju (verified owner)

    Good price. Works as expected


  9. dzineintegration (verified owner)

    Excellent Fast Delivery to Me
    Shipped by MACFOS Pvt. Ltd.
    In its Quick Highlights Please update that
    it comes with CR2032 Battery HOLDER with 1 Unit CR2032 3V Battery


  10. Uttamrao Borker (verified owner)


    Uttamrao Borker

  11. nevilneo010 (verified owner)

    I got the product on time. Ds3231 is simple a RTC. One can refer the datasheet to know the full potential of this module. The alarm function helps to set alarms and interrupt a microcontroller to wake up from sleep. which is essential for power saving when the power source is battery.


  12. M M Ansari (verified owner)

    Good at this price

    M M Ansari

  13. technockt (verified owner)

    We need the dimension of it anyone can share it?


  14. PRAKASH (verified owner)



  15. RAJESH KUMAR BEHERA (verified owner)

    Trouble free quality product .With Very Fast Delivery Comparison to Amazon n Other E-commerce Portals.. Previously I used to Order it from China n Hong Kong.but As I get the better quality at about same or Little more Manageable Price from Robu…The Best.and all tHe prices are Inclusive of GST..That is the Main Advantage..


  16. Dhananjay rai (verified owner)

    It is working fine and delivery was very fast within 2 days I received my product.
    Thank you Robu.in

    Dhananjay rai

  17. p (verified owner)

    product is average compair to price


  18. saurabh sinha (verified owner)

    very good product – Very fast delivery

    saurabh sinha

  19. svtcvja (verified owner)

    Working Well. Very fast shipping


  20. shakirmavoor (verified owner)

    nominal product
    medium rate


  21. shakir (verified owner)

    Nominal product
    medium price


  22. adisworld (verified owner)

    Nice product, good quality, working well. Very Fast shipping.


  23. Aravind MA (verified owner)

    Excellent. Works as expected. Delivered in one day to Bengaluru. Very fast.

    Aravind MA

  24. Ganeshan Muthusekar (verified owner)

    Ya its working…

    Ganeshan Muthusekar

DS3231 RTC datasheet.

AT24C32 32K bit EEPROM datasheet.

Arduino Library by MajicDesigns

Arduino Library by Adafruit.

Questions and answers of the customers

  1. 0 votes
    Q milli second range in time is possible? answer now
    Asked by stalinjohn54 on May 17, 2023 2:44 pm

    The DS3231 RTC module does not provide millisec... Read more

  2. 0 votes
    Q ds1307 works fine but ds3231 is not working fine with new button cells
    Asked by vrsolanki on April 2, 2021 7:53 pm
    There are no answers for this question yet. Answer now
Only registered users are eligible to enter questions
Country Of Origin: China

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