PCF8523 Adafruit RTC Module

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 data logging, clock-building, time stamping, timers, and alarms, etc. Equipped with PCF8523 RTC - it can run from 3.3V or 5V power & logic!

• 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. It may lose or gain up to 2 seconds a day.

Technical Details

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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