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Adafruit PCF8523 Real Time Clock Assembled Breakout Board

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Product Description

  • This is a great battery-backed real time clock (RTC) that allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost. Perfect for datalogging, clock-building, time stamping, timers and alarms, etc. Equipped with PCF8523 RTC - it can run from 3.3V or 5V power & logic!

    Works great with an Arduino using our RTC library or with a Raspberry Pi (or similar single board linux computer)

    • PCB & header are included
    • Plugs into any breadboard, or you can use wires
    • Two mounting holes
    • Will keep time for 5 years or more

    Note: This product does not come with a CR1220 coin cell battery.

    The PCF8523 is simple and inexpensive but not a high precision device.



    • Length: 25.8mm/1.02in
    • Width: 21.8mm/0.86in
    • Height: 5mm/0.2in
    • Weight: 2.3g/0.09oz
    • Mounting holes are 2.2mm(0.086in) diameter, 25mm(0.98in) apart
    • This board/chip uses I2C 7-bit address 0x68

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