The DS3231 AT24C32 IIC Module is a low-cost, highly accurate I2C-based real-time clock (RTC) module featuring an integrated temperature-compensated crystal oscillator (TCXO) and crystal. This module includes a battery input, ensuring accurate timekeeping even when the main power supply is disconnected. The built-in oscillator enhances the long-term accuracy of the device while reducing the number of components required for production.
The DS3231 module stores precise time and date information, including seconds, minutes, hours, day, date, month, and year. It automatically adjusts the end date for months with fewer than 31 days and accounts for leap years. The clock can operate in either 24-hour format or 12-hour AM/PM format. Additionally, the module features two programmable alarms and a configurable square wave output.
An integrated precision temperature sensor (±3 °C accuracy) allows for temperature readings via the I2C bus. The module automatically switches between the main power supply and backup power (e.g., battery) in the event of a power failure, maintaining accurate time and temperature without interruptions.
Technical Specifications:
Dimensions: 38 mm x 22 mm x 14 mm
Weight: 8 g
Operating Voltage: 3.3–5.5 V
Clock Chip: DS3231 high-precision RTC chip
Clock Accuracy: ±2 ppm (approximately 1 minute per year) at 0–40 °C
Alarms: Two programmable alarm functions
Square Wave Output: Programmable
Real-Time Clock: Tracks seconds, minutes, hours, day, date, month, and year with leap year compensation valid until 2100
Temperature Sensor: ±3 °C accuracy
Memory Chip: AT24C32 (32 KB storage capacity)
I2C Interface: Maximum transfer speed of 400 kHz (at 5 V operating voltage)
Wiring Instructions (for Arduino Uno R3):
SCL → A5
SDA → A4
VCC → 5 V
GND → GND
Product Description for Online Store: DS3231 Mini Module
The DS3231 Mini Module is a highly accurate real-time clock module designed for Raspberry Pi and Arduino platforms. It supports both 3.3 V and 5 V systems without the need for a level converter, making it extremely easy and convenient to use.
Features:
Temperature Range: -40 °C to +85 °C, timing accuracy ±5 ppm (±0.432 seconds/day)
Backup Power: Built-in battery for uninterrupted timekeeping
Low Power Consumption
Real-Time Clock: Tracks seconds, minutes, hours, date, month, and year
Alarms: Two programmable alarm functions
Output Signals: 1 Hz and 32.768 kHz square wave
I2C Interface: High-speed (400 kHz) bidirectional bus
Operating Voltage: +2.3 V to +5.5 V
Temperature Sensor: ±3 °C accuracy
Compact Design
The DS3231 Mini Module is an excellent choice for projects requiring accurate time and temperature tracking.
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