Adafruit PCF8523 Real Time Clock Assembled Breakout Board

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8.95 8.95 8.950000000000001 USD

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SKU : ADA-3295
Quantity on Hand : 5
Skill Level : Assembled and Tested
ROHS Compliant

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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, with CircuitPython 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. We recommend you purchase a coin cell battery to use with this product.

The PCF8523 is simple and inexpensive but not a high precision device. It may lose or gain up to 2 seconds a day. For a high-precision, temperature compensated alternative, please check out the DS3231 precision RTC

    Revision history:

    • As of Aug 30, 2017 we have updated the design to have an RC filter on the power supply to reduce accidental resetting if power drops too fast!

    Dimensions:

    • 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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