Comparison page

PCF8574 vs WS2812B

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.

PCF8574

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

WS2812B

Projects needing Addressable LED and RGB with a commonly available power part.

Specification Matrix

DimensionPCF8574 WS2812B

CategoryPowerPower

MakerNXPWorldsemi

CoreNot specifiedNot specified

ClockNot specifiedNot specified

WirelessNot specifiedNot specified

Voltage3.3V3.3V

LibrariesArduino, MicroPythonArduino, MicroPython

Price$0.20 - $1.00$0.03 - $0.20 per LED

Known Tradeoffs

PCF8574

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

WS2812B

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

Open Individual Model Pages

PCF8574

NXP

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

China-madePower84% confidence

WS2812B

Worldsemi

Addressable RGB LED with integrated controller used in strips, rings, and matrices.

China-madePower82% confidence