DS3231 RTC

The DS3231 is a highly accurate I²C RTC module with a temperature-compensated crystal oscillator (TCXO), onboard AT24C32 32Kbit EEPROM, and a 10-bit temperature sensor (±3°C, 0.25°C resolution). Battery backup (CR2032) maintains timekeeping when main power is lost. Configurable I2C address for EEPROM via SMD jumpers.

Features:

1. Extremely accurate TCXO-based RTC
2. Tracks seconds, minutes, hours, day, date, month, year — valid to 2100
3. Two time-of-day alarms
4. Onboard AT24C32 32Kbit EEPROM (I2C address configurable via A0/A1/A2 jumpers)
5. 10-bit temperature sensor output
6. Programmable square-wave output
7. CR2032 battery holder included

Specifications:

• Operating Voltage: 2.7V–5.5V
• Accuracy: ±2ppm (0 to +40°C), ±3.5ppm (-40 to +85°C)
• I2C Speed: 400kHz
• EEPROM: AT24C32, 32Kbit
• Temperature Sensor: 10-bit, ±3°C, 0.25°C resolution
• Operating Temperature: -40 to +85°C