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Main image of Waveshare MCP23017 IO Expansion Board I2C Interface 5V/3.3V Voltage Expands 16 I/O Pins Up to 8 Boards Stackable for 128 I/O Pins Multi I2C Modules Compatible

Alt view image 2 of 7 - Waveshare MCP23017 IO Expansion Board I2C Interface 5V/3.3V Voltage Expands 16 I/O Pins Up to 8 Boards Stackable for 128 I/O Pins Multi I2C Modules Compatible

Alt view image 3 of 7 - Waveshare MCP23017 IO Expansion Board I2C Interface 5V/3.3V Voltage Expands 16 I/O Pins Up to 8 Boards Stackable for 128 I/O Pins Multi I2C Modules Compatible

Alt view image 4 of 7 - Waveshare MCP23017 IO Expansion Board I2C Interface 5V/3.3V Voltage Expands 16 I/O Pins Up to 8 Boards Stackable for 128 I/O Pins Multi I2C Modules Compatible

Alt view image 5 of 7 - Waveshare MCP23017 IO Expansion Board I2C Interface 5V/3.3V Voltage Expands 16 I/O Pins Up to 8 Boards Stackable for 128 I/O Pins Multi I2C Modules Compatible

Alt view image 6 of 7 - Waveshare MCP23017 IO Expansion Board I2C Interface 5V/3.3V Voltage Expands 16 I/O Pins Up to 8 Boards Stackable for 128 I/O Pins Multi I2C Modules Compatible

Alt view image 7 of 7 - Waveshare MCP23017 IO Expansion Board I2C Interface 5V/3.3V Voltage Expands 16 I/O Pins Up to 8 Boards Stackable for 128 I/O Pins Multi I2C Modules Compatible

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Waveshare MCP23017 IO Expansion Board I2C Interface 5V/3.3V Voltage Expands 16 I/O Pins Up to 8 Boards Stackable for 128 I/O Pins Multi I2C Modules Compatible

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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); Comes with Online User Manual/Schematic/Code/Datasheets: bit.ly/4nrHG1t

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Features I2C controlled, expands 2 signal pins as 16 I/O pins I2C address configurable by shorting the A0/A1/A2 jumpers
Provides two connector options: PH 2.0 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

Specifications

Operating voltage: 5V/ 3.3V
Interface: I2C
Interrupt pins: INTA, INTB
Expansion I/Os: 16
Dimension: 38mm × 23mm
Mounting hole size: 2.0 mm Development Resources Package Content 1. MCP23017 IO Expansion Board x1 2. PH 2.0 20cm 6Pin x1

Additional Information
First Listed on Newegg	June 23, 2026

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Item#: 9SIC6W1M007400