Comparison page

MCP73831 vs PCF8574

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.

MCP73831

Projects needing Li-ion charger and Small with a commonly available power part.

PCF8574

Projects needing IO expansion and I2C with a commonly available power part.

Specification Matrix

DimensionMCP73831 PCF8574

CategoryPowerPower

MakerMicrochipNXP

CoreNot specifiedNot specified

ClockNot specifiedNot specified

WirelessNot specifiedNot specified

Voltage3.3V3.3V

LibrariesNeeds verificationArduino, MicroPython

Price$0.20 - $1.00$0.20 - $1.00

Known Tradeoffs

MCP73831

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

PCF8574

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

Open Individual Model Pages

MCP73831

Microchip

Tiny single-cell Li-ion charger used in compact battery-powered boards.

China-madePower84% confidence

PCF8574

NXP

I2C GPIO expander often used in LCD backpacks and small IO expansion modules.

China-madePower84% confidence