Adafruit PCF8523 Real Time Clock Breakout Board

Maintain precise timekeeping for your microcontroller projects with this reliable battery-backed real time clock (RTC). An ideal companion for tasks like data logging, clock-building, and time stamping, it ensures uninterrupted time tracking even during power loss.

The PCF8523 RTC operates seamlessly with both 3.3V and 5V power and logic, providing flexibility in usage. Plug-and-play functionality is achieved through STEMMA QT connectors, eliminating the need for soldering and making it compatible with Arduino, Raspberry Pi, and CircuitPython.

With a comprehensive setup including a fully assembled and tested breakout, it is designed for quick integration using either a breadboard or direct wiring. While a CR1220 coin cell battery is recommended for optimal performance, the robust design guarantees at least 5 years of accurate timekeeping.

Though the PCF8523 is not a high-precision device, it allows simple and cost-effective time management. For high-precision needs, the DS3231 precision RTC can be an alternative. Explore our tutorial for detailed instructions on pinouts, assembly, and coding for seamless implementation in your projects.