Datasheet for the Maxim Integrated DS3231, a low-cost, accurate I2C real-time clock with integrated TCXO and crystal.
The DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. It provides accurate timekeeping, two programmable time-of-day alarms, a programmable square-wave output, and battery backup for continuous operation. The device incorporates a battery input and maintains accurate timekeeping when main power to the device is interrupted.
| Accuracy (0°C to +40°C) | ±2ppm |
|---|---|
| Accuracy (-40°C to +85°C) | ±3.5ppm |
| Digital Temp Sensor Accuracy | ±3°C |
| Operating Temperature (Commercial) | 0°C to +70°C |
| Supply Voltage | 2.3V to 5.5V |
| I2C Interface Speed | 400kHz |
| Package Type | 16-pin, 300-mil SO |
The accuracy is ±2ppm from 0°C to +40°C.
Yes, it includes a digital temperature sensor output with ±3°C accuracy.
The supply voltage range is 2.3V to 5.5V.