DS3231 I2C Precision RTC Real Time Clock Module

Features:

• Highly accurate I2C real-time clock with an integrated temperature-compensated crystal oscillator.
• Battery input for uninterrupted timekeeping even during power failures.
• Available in commercial and industrial temperature ranges with a compact 16-pin package.
• Maintains time with second, minute, hour, day, date, month, and year tracking, including leap year corrections.
• 24-hour or 12-hour format with AM/PM indication, and two configurable alarm clocks.
• Automatic power supply switchover between main and backup power, ensuring continuous operation.
• Integrated digital temperature sensor with ±3°C accuracy, accessible via the I2C interface.

Specifications:

• Size: 38mm x 22mm x 14mm
• Weight: 8g
• Operating Voltage: 3.3V - 5.5V
• Clock Chip: High-precision DS3231
• Clock Accuracy: 2ppm from 0-40°C, error ~1 minute/month
• Two calendar alarms
• Programmable square-wave output
• Real-time clock valid till the year 2100 with leap year compensation
• Temperature Sensor Accuracy: ±3°C
• Memory: AT24C32 with 32K storage capacity
• IIC Bus Interface with 400KHz max transmission speed at 5V
• Cascadable with other IIC devices, configurable address by shorting A0/A1/A2
• Includes a rechargeable CR2032 battery holder
• Packing: Single anti-static packaging

Wiring Instructions (e.g., for Uno R3):

• SCL → A5
• SDA → A4
• VCC → 5V
• GND → GND

Package Included:

1 x DS3231 AT24C32 IIC Precision RTC Real Time Clock Memory Module (battery not included)