Comparison page

MCP23017 vs MP1584EN

Side-by-side selection notes for specs, ecosystem readiness, known issues, and data confidence. This page is generated from structured component fields instead of a hand-written article.

MCP23017

Projects needing IO expansion and 16 pins with a commonly available power part.

MP1584EN

Projects needing Buck and Compact with a commonly available power part.

Specification Matrix

DimensionMCP23017 MP1584EN

CategoryPowerPower

MakerMicrochipMonolithic Power Systems

CoreNot specifiedNot specified

ClockNot specifiedNot specified

WirelessNot specifiedNot specified

Voltage3.3V3.3V

LibrariesArduino, MicroPythonNeeds verification

Price$1.00 - $3.50$0.30 - $1.20

Known Tradeoffs

MCP23017

Breakout boards may use different pin labels or regulator choices
Clone modules can differ from the original datasheet part

MP1584EN

Breakout boards may use different pin labels or regulator choices
Clone modules can differ from the original datasheet part

Open Individual Model Pages

MCP23017

Microchip

16-bit I2C GPIO expander used when a microcontroller needs many extra digital pins.

China-madePower86% confidence

MP1584EN

Monolithic Power Systems

Compact buck converter used in small adjustable DC-DC step-down modules.

China-madePower80% confidence