Comparison page
AMS1117-3.3 vs MCP23017
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.
AMS1117-3.3
Projects needing LDO and Common with a commonly available power part.
MCP23017
Projects needing IO expansion and 16 pins with a commonly available power part.
Specification Matrix
CategoryPowerPower
MakerAdvanced Monolithic SystemsMicrochip
CoreNot specifiedNot specified
ClockNot specifiedNot specified
WirelessNot specifiedNot specified
Voltage3.3V3.3V
LibrariesNeeds verificationArduino, MicroPython
Price$0.05 - $0.30$1.00 - $3.50
Known Tradeoffs
AMS1117-3.3
- Breakout boards may use different pin labels or regulator choices
- Clone modules can differ from the original datasheet part
MCP23017
- Breakout boards may use different pin labels or regulator choices
- Clone modules can differ from the original datasheet part