I2C to GPIO IO Controller CH423A DIP28 pin

I2C to GPIO IO expander breakout board, you can use it for applications like remote IO expander, digital potentiometer, segment display driver etc

Based on low cost chip CH423. You can replace with similar chips like PCF23017, PCF8574, etc

• 8 Bidirectional IO  ports IO0-IO7
• 16 Output-only IO ports: OC0 – OC15
• 3-5V power supply, compatible I2C interface

More chip features please see the chip page here.