# DS3231 I2C Precision RTC Module

> DS3231 I2C Precision RTC Module, compatible with Arduino and other development boards. Uses the DS3231M clock chip and AT24C32 memory chip (32K), communicating via I2C interface. Features a built-in temperature sensor and programmable alarm output. Power supply 3.3-5.5VDC, backup battery CR2032 or LIR2032 (rechargeable, not included). Dimensions: 38 x 22 x 14 mm.

- Page: https://sigmanortec.ro/en/ds3231-i2c-precision-rtc-module
- Price: 30.60 RON
- Availability: In stock; 1-2 zile
- Reference: 33002 · EAN: 5947221414375
- Category: Mechatronics and IoT > Sensors and Modules > Clock Module
- Package (shipping data): 0.006 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 04:32 (Europe/Bucharest)

## Description

Precision RTC module for maintaining time and calendar on Arduino and other boards, with very good stability over temperature variations. It communicates quickly via I2C, includes AT24C32 memory for data, has a programmable alarm and integrated temperature sensor. It operates at 3.3-5.5V and accepts a CR2032 battery as a backup for keeping time in the event of a power failure.
Precision Real Time Clock (RTC) Module, compatible with Arduino and other development boards.
The module operates with a CR2032 battery (not included).
The module is a fully featured precision clock with a built-in calendar. The battery acts as a backup in case of power failure and can keep time for at least one year. Accuracy is well maintained even with temperature changes.
Communication with the development board is done via the I2C interface.
For more details about the module click here.
Power supply voltage: 3.3-5.5VDC
Clock chip: DS3231M
Memory chip: AT24C32 with 32K memory
Communication interface: I2C, IIC
Backup battery: CR2032 or LIR2032 (rechargeable)
Built-in temperature sensor
Programmable alarm output
Dimensions mm: 38 x 22 x 14