DS3231 RTC Real Time Clock Module

DS3231 RTC Real Time Clock Module is a highly accurate I²C-based real-time clock with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. It maintains accurate timekeeping and provides information including seconds, minutes, hours, day, date, month, and year, with leap-year correction. The module is widely used in embedded systems, IoT, and low-power applications that require reliable date and time tracking.

Key Features of DS3231 RTC Real Time Clock Module:

• High Accuracy: Integrated TCXO for precise timekeeping with ±2ppm accuracy from 0°C to +40°C.
• I²C Interface: Communicates via I²C protocol for easy integration with microcontrollers.
• Battery Backup: Keeps timekeeping active even during power outages with a CR2032 battery.
• Alarm Functions: Supports two programmable time-of-day alarms.
• Temperature Sensor: Built-in digital temperature sensor with ±3°C accuracy.

Technical Specifications of DS3231 RTC Real Time Clock Module:

• Operating Voltage: 3.3V to 5.5V
• Timekeeping Accuracy: ±2ppm (0°C to +40°C)
• Communication Interface: I²C (400kHz)
• Temperature Range: -40°C to +85°C
• Battery Backup: CR2032 coin cell supported
• Memory: 32 bytes of user-accessible EEPROM

Mechanical Specifications of DS3231 RTC Real Time Clock Module:

• Module Dimensions: Approx. 38mm x 22mm
• Mounting: Through-holes for PCB or case mounting
• Weight: Approx. 5 grams

Dimensions:

• Length: 38mm
• Width: 22mm
• Height (with battery): 14mm

Mounting Options:

• PCB Mounting: Module has standard through-holes for direct mounting on PCBs.
• Panel Mounting: Can be mounted on enclosures using custom brackets.

Schematic Diagram, Connection, Wiring and Pinout of DS3231 RTC Module:

• VCC: Connect to 3.3V or 5V power supply
• GND: Ground
• SDA: I²C data line (connect to microcontroller’s SDA)
• SCL: I²C clock line (connect to microcontroller’s SCL)
• 32K: 32kHz square-wave output (optional)
• SQW: Square-wave output pin (programmable via I²C)

Datasheet of DS3231 RTC Real Time Clock Module:

• Download DS3231 Datasheet (PDF)

Applications of DS3231 RTC Real Time Clock Module:

• Embedded Systems: Keeps accurate time in microcontroller-based systems.
• IoT Devices: Used in data logging, remote sensors, and smart devices.
• Clocks and Timers: Ideal for digital clocks and programmable timers.
• Alarm Systems: Enables time-triggered alerts and reminders.
• Environmental Monitoring: Timestamp for temperature or weather data logs.

Equivalent of DS3231 RTC Real Time Clock Module:

• DS1307: Similar RTC module but with lower accuracy and external crystal
• PCF8563: Low-power RTC with I²C interface and alarm functions
• RV-3028-C7: Ultra-low power RTC module with better timekeeping

Package Includes:

• 1 x DS3231 RTC Real Time Clock Module