Features / Specs
- RTC Chip: Maxim DS3231
- Comms Interface: I2C (Up to 400kHz) with selectable address jumpers
- Accuracy: ±2ppm from 0°C to +40°C / ±3.5ppm from -40°C to +85°C
- Integrated TCXO (Temperature compensated crystal oscillator) and crystal
- Embedded digital temperature sensor with an accuracy of ±3°C
- Two Time-of-Day Alarms
- Programmable Square-Wave Output Signal
- EEPROM Chip: AT24C32 (32Kbyte)
- Module Operating Voltage: 3.3 – 5.5VDC
- Compatible Battery: 2032
- Dimensions: ~(39mm x 23mm x 14mm)
Pin Description
- 32K-> Open-drain 32KHz Output
- SQW-> Open-drain Active Low Interrupt or Square Wave Output
- SCL-> I2C Clock
- SDA-> I2C Data
- VCC-> Supply Voltage (3.3 – 5.5VDC)
- GND-> Ground
Notes
- If using a non-rechargeable CR2032 battery, desolder the diode connected to the positive pin of the battery to disable the charge circuit
- If using a rechargeable LIR2032 battery, supply voltage should not exceed 4.6VDC for safe use of battery charge circuit