Adafruit PCF8523 Real Time Clock Breakout Board - STEMMA QT / Qwiic

The Adafruit PCF8523 Real Time Clock (RTC) Breakout Board is a battery-backed RTC that keeps track of time even during power loss or reprogramming, perfect for data-logging, clock-building, time stamping, timers, and alarms.

Equipped with the PCF8523 RTC chip, the board supports both 3.3V and 5V power and logic. It includes STEMMA QT connectors for easy plug-and-play with compatible microcontrollers without the need for soldering.

• Comes with PCB and header
• Compatible with breadboards and jumper wires
• Two mounting holes for secure placement
• Maintains time for 5 years or more with a coin cell battery (not included)
• I2C interface with 7-bit address 0x68
• Works with Arduino, CircuitPython, Raspberry Pi, and other microcontrollers
• Includes SparkFun Qwiic/STEMMA QT compatible connectors

Note: A CR1220 coin cell battery is required but not included. We recommend purchasing one separately.

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