PCF8575: 16-Bit I2C I/O Expander
Running out of pins on your R1BBIT board? The PCF8575 provides a simple and efficient way to add 16 additional digital I/O pins using only two wires from your I2C bus. Each of the 16 ports can be independently configured as an input or an output, making it the perfect solution for driving LEDs, reading keypads, or controlling multiple relays.
- I/O Expansion: Instantly adds 16 pins to your project.
- Interrupt Output: Features an interrupt pin (INT) to notify the R1BBIT controller when an input state changes—no constant polling required.
- Addressable: Up to 8 expanders can be connected to the same bus, providing up to 128 additional I/O ports.