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, and is 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.
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.
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
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 |
Datasheet
Download (PDF)Support
For technical questions, documentation and issue reports, use the GitHub repository or write to us directly.