Expansion I/o Board Pcf8574 Support Module
The I/O expansion module offers a simple and effective solution for increasing the input/output capabilities of your microcontroller using the I2C interface. Each module provides 8 bidirectional I/O lines, which can be cascaded up to 8 modules for a total of 64 I/O lines. This design is perfect for applications that demand multiple I/O points without overwhelming the microcontroller’s available pins.
The module supports both 3.3V and 5V logic levels, ensuring compatibility with a wide range of systems including Arduino, Raspberry Pi, and other microcontrollers. Additionally, it includes an interrupt output for efficient real-time event handling.
Package Includes:
- 1 x Expansion I/O Board PCF8574 Support Module
Features:
- Efficient I/O Expansion: Each module supports 8 bidirectional I/O lines. Cascading up to 8 modules extends capability to 64 I/O lines using a single I2C bus.
- I2C Communication: Operates over a reliable I2C interface with jumper-adjustable addresses for multiple device support.
- Interrupt Output: Allows microcontrollers to efficiently respond to state changes or events without constant polling.
- Voltage Compatibility: Compatible with both 3.3V and 5V systems for broad microcontroller support.
Specifications:
- Data Lines: 8 bidirectional I/O lines per module
- Expandable: Supports cascading of up to 8 modules (total of 64 I/O lines)
- Interface: I2C with jumper-configurable addresses
- Interrupt Output: Available for event-driven applications
- Voltage Compatibility: 3.3V and 5V
Applications:
- Expanding I/O capacity for microcontrollers with limited pins
- Home automation systems requiring multiple sensors and actuators
- Robotics projects with many switches, sensors, motors, or LEDs
- Industrial automation and scalable control systems
- Prototyping environments requiring flexible I/O expansion
Pinout:
| Pin | Name | Description |
|---|---|---|
| 1 | VCC | Power input (3.3V or 5V based on system) |
| 2 | GND | Ground (common ground with microcontroller) |
| 3 | SCL | I2C clock line (connect to microcontroller SCL) |
| 4 | SDA | I2C data line (connect to microcontroller SDA) |
Features:
- Efficient I/O Expansion: Each module supports 8 bidirectional I/O lines. Cascading up to 8 modules extends capability to 64 I/O lines using a single I2C bus.
- I2C Communication: Operates over a reliable I2C interface with jumper-adjustable addresses for multiple device support.
- Interrupt Output: Allows microcontrollers to efficiently respond to state changes or events without constant polling.
- Voltage Compatibility: Compatible with both 3.3V and 5V systems for broad microcontroller support.
Specifications:
- Data Lines: 8 bidirectional I/O lines per module
- Expandable: Supports cascading of up to 8 modules (total of 64 I/O lines)
- Interface: I2C with jumper-configurable addresses
- Interrupt Output: Available for event-driven applications
- Voltage Compatibility: 3.3V and 5V
Applications:
- Expanding I/O capacity for microcontrollers with limited pins
- Home automation systems requiring multiple sensors and actuators
- Robotics projects with many switches, sensors, motors, or LEDs
- Industrial automation and scalable control systems
- Prototyping environments requiring flexible I/O expansion
Pinout:
| Pin | Name | Description |
|---|---|---|
| 1 | VCC | Power input (3.3V or 5V based on system) |
| 2 | GND | Ground (common ground with microcontroller) |
| 3 | SCL | I2C clock line (connect to microcontroller SCL) |
| 4 | SDA | I2C data line (connect to microcontroller SDA) |