Boardoza PCF8563T RTC Breakout Board

The Boardoza PCF8563T RTC Breakout Board is a compact and reliable real-time clock solution built around the PCF8563T low-power CMOS clock/calendar IC from NXP. It provides accurate timekeeping with full calendar functionality including year, month, day, weekday, hours, minutes, and seconds. Designed for embedded systems that require dependable time management.

With its simple I²C interface and clearly labeled header pins, this breakout board is fully compatible with Arduino, Raspberry Pi, STM32, ESP32, and other microcontrollers that support I²C communication. It is ideal for applications such as data logging, alarm scheduling, time-stamping systems, industrial controllers, IoT devices, and battery-powered embedded projects.

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Front Side	Back Side

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Key Features

• Accurate Real-Time Clock: Maintains precise time and full calendar tracking.
• I²C Interface: Simple and widely supported communication with microcontrollers.
• Interrupt & Clock Output: Provides nINT for alerts and CLK_O for clock signal output.
• Battery Backup Support: Continues timekeeping during power loss with a coin cell battery.
• Wide Compatibility: Works with Arduino, ESP32, STM32, Raspberry Pi, and more.

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Technical Specifications

Model: PCF8563T
Manufacturer: Boardoza
Manufacturer IC: NXP Semiconductors
Input Voltage: 2.5V – 5.5V DC
Functions: Real-Time Clock & Calendar
Communication: I²C (7-bit address 0x51, Write: A2h, Read: A3h)
Oscillator Frequency: 32.768 kHz
Operating Temperature: -40°C to +85°C
Board Dimensions: 20mm x 20mm

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Board Pinout

( J1 ) Main Connector

Pin Number	Pin Name	Description
1	VCC	Supply Voltage
2	nINT	Interrupt Output (Active Low)
3	SDA	I²C Serial Data Pin
4	SCL	I²C Serial Clock Pin
5	CLK_O	Clock Output
6	GND	Ground

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Board Dimensions

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Step Files

Boardoza PCF8563T.step

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Datasheet

PCF8563T Datasheet

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Version History

• V1.0.0 - Initial Release

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Support

• If you have any questions or need support, please contact [email protected]

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License

This repository contains both hardware and software components:

Hardware Design

All hardware design files are licensed under Creative Commons Attribution-ShareAlike 4.0 International License.

Software/Firmware

All software and firmware are licensed under BSD 3-Clause License.