The BMT PCF8574T I/O Expansion Board is a compact and reliable solution for expanding the digital input/output capabilities of microcontrollers via the I C (IIC) bus. Based on the PCF8574T chip, this module provides 8 additional digital I/O ports and supports up to 8 cascaded modules, allowing for a total of 64 I/O ports on a single I C bus. This makes it an ideal choice for applications requiring multiple sensors, buttons, relays, or LEDs.
Designed for maximum flexibility, the board features an I C pin header on one side and a daisy-chain I C connector on the other, making it easy to integrate into modular projects.
Features:
- 8-Bit Digital I/O Expansion
- Provides 8 additional I/O lines per module
- Operates as a remote I/O port over I C protocol
- Cascadable Design for Scalability
- Up to 8 boards can be connected on the same I C bus
- Enables control of up to 64 I/O lines using unique I C addresses
- Dual I C Interface for Easy Integration
- Pin header and I C connector on opposite sides for flexible wiring
- Supports daisy chaining of multiple modules
Wide Operating Voltage
Compatible with 2.5V to 6V systems
Ideal for both 3.3V and 5V microcontrollers (Arduino, ESP32, Raspberry Pi, etc.)
Compact and Breadboard-Friendly
Small form factor perfect for prototyping and embedded systems
Easily fits into compact spaces in control panels or custom enclosures
Specifications:
- Chipset: PCF8574T
- Operating Voltage: 2.5V - 6V DC
- Communication Interface: I C (IIC)
- I/O Ports: 8-bit parallel output/input
- Cascading Support: Up to 8 boards
- I C Address Configuration: Configurable via jumpers or solder pads
Applications:
- Expanding I/O for microcontrollers with limited pins
- Button and switch matrix interfacing
- LED or relay control systems
- Home automation and smart panels
- Industrial monitoring and control
What's in the box
x1 BMT PCF8574T I2C 8-Bit I/O Expansion Board
