MCP23017 IO Expansion Board I2C Interface 5V/3.3V Voltage Expands 16 I/O Pins 8pcs of Boards can Stack to Use at The Same Time up to 128 I/O Pins Allows Multi I2C modules to be Stacked

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Feature

The MCP23017 IO Expansion Board expands 2 signal pins as 16 I/O pins based on the I2C bus, up to 8 MCP23017 IO Expansion Board can be used at the same time, providing up to 128 I/O pins, it is compatible with both 3.3V and 5V levels.
I2C controlled, expands 2 signal pins as 16 I/O pins .Interrupt pins: INTA, INTB.
I2C address configurable by shorting the A0/A1/A2 jumpers
Provides two connector options: PH2.0 terminal and/or solder pads, allows multi I2C modules to be stacked. Onboard voltage translator, compatible with 3.3V/5V level. Comes with development resources and manual (examples for Raspberry Pi / micro:bit / Arduino / STM32)