Comparison page

PCF8574 vs TP4056

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.

TP4056

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

Specification Matrix

DimensionPCF8574 TP4056

CategoryPowerPower

MakerNXPNanJing Top Power

CoreNot specifiedNot specified

ClockNot specifiedNot specified

WirelessNot specifiedNot specified

Voltage3.3V3.3V

LibrariesArduino, MicroPythonNeeds verification

Price$0.20 - $1.00$0.10 - $0.50

Known Tradeoffs

PCF8574

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

TP4056

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

TP4056

NanJing Top Power

Very common single-cell lithium battery linear charger used in low-cost charging modules.

China-madePower78% confidence