DS3231S#
Overview
The DS3231S# is an extremely accurate I2C real-time clock (RTC) featuring an integrated temperature-compensated crystal oscillator (TCXO) and crystal. It manages all timekeeping functions including leap-year compensation through 2100 and provides a highly stable reference by compensating for crystal frequency shifts across temperature. The device includes a battery-backup input to ensure continuous timekeeping even when primary system power is removed.
Why Choose This Part
The integrated TCXO provides exceptional accuracy, maintaining time within plus or minus 2ppm from 0 degrees C to 70 degrees C. By integrating the crystal and compensation circuitry into a single 16-pin SO package, it reduces component count, simplifies PCB layout, and eliminates the tuning issues associated with external crystals.
Applications
Key Specifications
Getting Started
Connect the DS3231 to an I2C bus with pull-up resistors on SDA and SCL, and provide a 3V coin cell to the V_BAT pin for backup. Engineers often use the DS3231 Breakout from Adafruit or SparkFun for rapid prototyping with Arduino or Raspberry Pi environments. Software implementation is straightforward using standard I2C libraries to access the register map for time, alarms, and temperature data.
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