PCF8574T I2C I/O Extension Board Module
Description:
PCF8574T I/O Expander Module is a versatile I2C-based GPIO extension board that adds 8 digital I/O pins to your microcontroller using just two wires (SCL & SDA). Based on the PCF8574T chip, this module is perfect for projects needing more input/output capabilities—such as controlling buttons, LEDs, relays, or keypads. Stackable and addressable, it's ideal for Arduino, ESP32, Raspberry Pi, and other I2C-compatible platforms.
Features:
1. I2C Communication Interface
2. 8 Digital I/O Pins
3. I/O Pin Expander for Microcontrollers
4. Low Power Consumption
5. Built-In Pull-up Resistors
6. Wide Voltage Range
7. Flexible I/O Configuration
8. Compact and Easy to Integrate
9. Multiple Module Support
10. Interrupt Capabilities (Optional)
Diagram:
Specifications:
| IC Type | PCF8574T |
| Communication Protocol | I2C (Inter-Integrated Circuit) |
| Number of I/O Pins | 8 Digital I/O Pins |
| Input Voltage Range | 2.5V to 6V |
| I2C Address | Default 0x20 |
| Operating Voltage | 3.3V or 5V |
| Maximum Clock Speed (I2C) | 400kHz |
| Operating Temperature | -40°C to +85°C |
| Dimensions | ~25mm x 20mm |
| Pin Header Type | 2.54mm pitch |
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