DS3231 RTC Module Precise Real Time Clock I2C AT24C32

DS3231 RTC Module is a highly accurate real-time clock with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. It uses I2C communication and includes the AT24C32 EEPROM for additional non-volatile data storage. This module is ideal for timekeeping applications requiring precision and low power consumption, such as data loggers, alarms, and embedded systems.

Key Features of DS3231 RTC Module Precise Real Time Clock I2C AT24C32:

• High Accuracy: Built-in TCXO ensures ±2ppm accuracy, equivalent to ±1 minute per year.
• I2C Interface: Communicates easily with microcontrollers over I2C protocol.
• Battery Backup: Supports CR2032 battery to maintain timekeeping during power loss.
• AT24C32 EEPROM: 32Kbit memory for storing custom user data.
• Alarm and Square Wave Output: Configurable alarms and 1Hz to 32kHz square wave outputs.

Technical Specifications of DS3231 RTC Module Precise Real Time Clock I2C AT24C32:

• RTC Chip: DS3231SN
• EEPROM: AT24C32 (32Kbit / 4KB)
• Interface: I2C (Address: 0x68 for DS3231, 0x57 for AT24C32)
• Timekeeping Format: 24-hour and 12-hour with AM/PM
• Operating Voltage: 3.3V – 5.5V
• Accuracy: ±2ppm (0°C to +40°C)
• Operating Temperature: -40°C to +85°C

Mechanical Specifications of DS3231 RTC Module:

• Module Dimensions: Approx. 38mm x 22mm
• Mounting Holes: 2 x M2 holes for secure installation
• Battery Holder: Supports CR2032 (not always included)
• PCB Type: Double-sided FR4

Pinout Description:

• VCC: Power supply input (3.3V – 5.5V)
• GND: Ground
• SCL: I2C Clock Line
• SDA: I2C Data Line
• 32K: 32.768kHz output (optional)
• SQW: Square wave output / interrupt output

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

• Connection: Connect VCC to 3.3V/5V, GND to ground, SDA and SCL to respective I2C pins of microcontroller.
• Wiring: Ensure pull-up resistors (~4.7kΩ) on SDA and SCL if not already present.
• Pinout: Labeled clearly on the module: VCC, GND, SDA, SCL, 32K, SQW.

Datasheet of DS3231 RTC Module Precise Real Time Clock I2C AT24C32:

• Download DS3231 Datasheet (PDF)
• Download AT24C32 EEPROM Datasheet (PDF)

Applications of DS3231 RTC Module Precise Real Time Clock I2C AT24C32:

• Data Logging: Maintain accurate timestamps for sensor logs and event records.
• Home Automation: Schedule relays or events based on time.
• Embedded Projects: Maintain real-time operations for battery-powered systems.
• Alarms and Timers: Built-in alarm functions for timed events.
• Wearable and Portable Devices: Ultra-low power operation ideal for small electronics.

Equivalent of DS3231 RTC Module Precise Real Time Clock I2C AT24C32:

• DS1307: Lower accuracy RTC alternative without TCXO.
• PCF85263A: NXP low-power I2C RTC with alarms.
• RV-3028-C7: Ultra-low power RTC with higher accuracy and features.

Package Includes:

• 1 x DS3231 RTC Module with AT24C32 EEPROM