DS3231 Real Time Clock Module RTC for Arduino

The module can work on either 3.3 or 5 V which makes it suitable for many development platforms or microcontrollers. The battery input is 3V and a typical CR2032 3V battery can power the module and maintain the information for more than a year. The module uses the I2C Communication Protocol which makes the connection to the Arduino Board very easy.

• Size: 38mm (length) * 22mm (W) * 14mm (height)
• Operating voltage: 3.3 – 5 .5 V
• DS3231M at the core
• Clock Accuracy: 5ppm 0-40 ºC
• Two programmable alarms
• Programmable square-wave output
• DS3231M Datasheet
• LIR2032 / CR2032 backup battery holder for uninterrupted time management (battery not included)
• Wiring instructions (with Arduino Uno R3 for example):
• SCL → A5
• SDA → A4
• VCC → 5V
• GND → GND