DS3231 RTC Module Precise Real Time Clock I2C – AT24C02

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Specifications:

  • Accuracy 2 ppm from 0° C to +40° C
  • Accuracy 3.5 ppm from -40° C to +85° C
  • Digital Temp Sensor Output: ±3° C Accuracy
  • Memory Chips: AT24C02 (2Kbit)
  • Register for Aging Trim
  • RST Output/Pushbutton Reset Debounce Input
  • Two Time-of-Day Alarms
  • Programmable Square-Wave Output Signal
  • Fast 400 Khz I2C interface
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DS3231 RTC Module – Precise Real-Time Clock with I2C Interface

The DS3231 RTC Module is a reliable, low-cost, and highly precise real-time clock solution. Powered by the DS3231 chip from Maxim, it integrates a temperature-compensated crystal oscillator and supports I2C communication, ensuring accurate timekeeping across various applications. With a built-in CR2032 battery holder, the module maintains time even during power interruptions, making it an ideal choice for systems requiring consistent time data.

Key Features

  • Accurate Timekeeping: Tracks seconds, minutes, hours, day, date, month, and year, with automatic leap year adjustments valid up to 2100.
  • Temperature Compensation: Offers accuracy of ±2 ppm (0°C to +40°C) and ±3.5 ppm (-40°C to +85°C).
  • Multiple Modes: Supports 12-hour and 24-hour formats with AM/PM indication.
  • Advanced Alarms: Two programmable alarms for customized notifications.
  • I2C Interface: Fast 400 kHz I2C communication for seamless integration.
  • Battery Backup: Onboard CR2032 battery holder ensures uninterrupted operation during power outages.
  • Additional Functionality: Includes programmable square wave output, digital temperature sensor, and pushbutton reset debounce input.
  • Integrated EEPROM: Features an AT24C32 chip for 32Kbit of serial I2C storage.

Specifications

Parameter Details
Operating Voltage (VDC): 2.7 ~ 5.5
RTC Supply Voltage: 2.2 ~ 5.5 V
Accuracy: ±2 ppm (0°C to +40°C), ±3.5 ppm (-40°C to +85°C)
Battery Backup: CR2032 Coin Battery Holder
Interface: Fast 400 kHz I2C Interface
EEPROM: AT24C32 (32Kbit Serial I2C)
Time Format: HH:MM:SS (12/24 hr)
Date Format: YY-MM-DD-dd
Operating Temperature Range: -40°C to +85°C
Digital Temp Sensor Accuracy: ±3°C with 0.25°C resolution
Dimensions (L×W×H) [mm]: 38 × 22 × 14
Weight: 8 g

Applications

  • Data loggers
  • Alarm systems
  • IoT devices
  • Embedded systems requiring precise timekeeping

Connection Diagram

Refer to the labeled pins for proper connections:

  • SCL: Serial Clock Line (I2C)
  • SDA: Serial Data Line (I2C)
  • VCC: Supply Voltage (2.7 ~ 5.5 VDC)
  • GND: Ground

With its robust design and advanced features, the DS3231 RTC Module is the perfect choice for maintaining accurate time in your projects and applications.

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