DS3231 RTC Memory Module Precise Real Time Clock I2C-AT24C32

DS3231 RTC Memory Module Precise Real Time Clock I2C-AT24C32

The DS3231 RTC Memory Module with I2C interface and integrated AT24C32 offers a low-cost, highly accurate real-time clock (RTC) solution. Equipped with a temperature-compensated crystal oscillator (TCXO) and a crystal, this module ensures precise timekeeping and improves long-term accuracy by minimizing component count during production.

This RTC module keeps track of seconds, minutes, hours, days, dates, months, and years. It automatically adjusts for months with fewer than 31 days and accounts for leap years. The clock can operate in either 24-hour format or 12-hour format with AM/PM indication. It also features two configurable alarm clocks and a calendar with a square wave output. Data is transferred via a bidirectional I2C bus, providing efficient communication with the system.

The DS3231 includes a precision temperature-compensated voltage reference and comparator circuit that monitors the VCC status, detecting power failures and triggering a reset output if necessary. It can also automatically switch to backup power in the event of a failure. Additionally, a /RST pin allows for manual reset generation.

In terms of additional functionality, the DS3231 incorporates a highly accurate digital temperature sensor, accessible via the same I2C interface. The temperature sensor has an accuracy of ±3°C. The module also features an on-chip power supply control circuit, which manages both primary and backup power sources (such as a low-voltage battery). If the main power fails, the device continues to provide accurate time and temperature data without interruption. When the main power returns or reaches the proper voltage range, the built-in reset function ensures a smooth system restart.

Connection Diagram: –

Wiring Specification:

SCL : A5

SDA : A4

VCC : 5V

GND : GND

Features

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 AT24C02 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.

Specification                                          

Voltage Supply: 2.2 V ~ 5.5 V (for RTC).

Time Format: HH: MM: SS (12/24 hr).

1 Hz output pin SQW.

Date Format: YY-MM-DD-dd.

DS 3231 based RTC with 2032 Battery Holder.

Package Includes:

1 x DS3231 RTC Memory Module

Note: –

Battery is not included with module.