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IO Expander

Welcome to the range of I/O Expander Breakout boards from PMD Way. 

An I/O (Input/Output) expander offers you more inputs and/or outputs for your microcontroller or development board. For example, you can add sixteen inputs using one MCP23017. We also have boards based on the SX1509, PCF8574 and more. 

If you are looking for bare I/O expander ICs - please click here

If you need any help choosing an expander - or after a bulk deal, please email