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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- RTC IC: PCF8563T, capable of maintaining accurate time and date.
- Communication Interface: I²C (SCL, SDA lines) with dedicated nINT and CLK_O pins.
- Battery Backup Support: Maintains timekeeping during main power loss (CR1224 coin cell supported).
- Precision Crystal: On-board 32.768 kHz crystal oscillator for stable timing.
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
| 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 |
- V1.0.0 - Initial Release
- If you have any questions or need support, please contact support@boardoza.com
This repository contains both hardware and software components:
All hardware design files are licensed under Creative Commons Attribution-ShareAlike 4.0 International License.
All software and firmware are licensed under BSD 3-Clause License.