Fangrui Product Details 1. Waveshare Aw9523b Io Expansion Board, I2c Interface, Expands 16 Io Pins 2. Features 3. I2c Bus, Allows Expanding 16 Io Ports By Just Using Two Wires 4. Support Driving 16-ch Common Anode Constant Current Led, 256-step Linear Dimming, Current Controllable 5. Output Interrupt (int) Signal When Changing The State Of An Input Port 6. I2c Address Configurable By Shorting The A0a1 Jumpers 7. Provide Two Connector Options: Ph2.0 Header Andor Solder Pads, Allows Multi I2c Modules To Be Stacked 8. Onboard Voltage Translator, Compatible With 3.3v5v Level 9. Come With Development Resources And Manual (examples For Raspberry Pi Micro:bit Arduino Stm32) 10. Specifications 11. Working Voltage: 2.4-5.5v 12. Working Temperature: -40-85 Degree C 13. Low Standby Current: Less Than 0.1ua 14. Control Interface: I2c 15. Expansion Io Pins: 16 16. Size: 38x23mm 17. Package List 18. Aw9523b Io Expansion Board X 1 19. Ph2.0 6pin Wire X 1