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MCP23017 IO Expansion Board Expands 16 I/O Pins, Support Use 8 Expansion Modules

Item #: 9SIVTUDM5U0319
Mfr. Part #: C26.8.31CXY-817

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I2C controlled, expands 2 signal pins as 16 I/O pins based on the I2C bus, supports using 8 Expansion Boards at the same time, which can be expanded to 128 I/O ports
I2C address configurable by shorting the A0/A1/A2 jumpers
Onboard voltage translator, compatible with 3.3V/5V level
Provides two connector options: PH2.0 terminal and/or solder pads, allows multi I2C modules to be stacked
Comes with Online Development Resources and Manual (examples for RPi / micro:bit / Ardu / STM32): n9.cl/df3o3

Overview

Specs

Reviews

I2C controlled, expands 2 signal pins as 16 I/O pins based on the I2C bus, supports using 8 Expansion Boards at the same time, which can be expanded to 128 I/O ports
I2C address configurable by shorting the A0/A1/A2 jumpers
Onboard voltage translator, compatible with 3.3V /5V level
Provides two connector options: PH 2.0 terminal and/or solder pads, allows multi I2C modules to be stacked
Comes with Online Development Resources and Manual (examples for
RPi / micro: bit / Ardu /
STM32): n9. cl/df3o3

Model
Brand	Fervit

Additional Information
First Listed on Newegg	August 31, 2026

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Return for replacement within: 60 days
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Item#: 9SIVTUDM5U0319