Technical Information. Pin Name Description VCC Connected to positive of power source. GND Connected to ground. SDA Serial Data pin (I2C interface) SCL Serial Clock pin (I2C interface) SQW Square Wave output pin 32K 32K oscillator output Operating voltage of DS3231 MODULE: 2.3V – 5.5V Can operate on LOW voltages Consumes 500nA on battery backup Maximum voltage at SDA , SCL : VCC + 0.3V Operating temperature: -45ºC to +80ºC Features RTC counts seconds, minutes, hours and year Accuracy: +2ppm to -2ppm for 0ºC to +40ºC , +3.5ppm to -3.5ppm for -40ºC to +85ºC Digital temperature sensor with ±3ºC accuracy…
The DS3231 is a low-cost, extremely accurate I2C real- time clock (RTC) with an integrated temperature- compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate timekeeping when main power to the device is interrupted.
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