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Architeuthis-Flux / Jumperless

A jumperless breadboard
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Recommending CH446Q for smaller package #2

Closed DeqingSun closed 1 year ago

DeqingSun commented 1 year ago

I just came across this project and I remember datasheet of CH446Q mentioned it was functionally compatible to MT8816AP, although not pin compatible. Hope this is useful information if you want a newer or thinner chip.

Architeuthis-Flux commented 1 year ago

I've been aware of this chip for a while and was skeptical to try it out. But your comment finally convinced me to give it another look.

I switched microcontrollers to the RP2040 and it doesn't quite have enough IO to do the parallel addressing, but as it turns out, the CH446Q can accept commands over serial too.

And LCSC had them in stock so I can just order them assembled now.

So the new revision uses them, just wanted to say thanks for the suggestion.

DeqingSun commented 1 year ago

I made a project with the chip. You can check it's schematic and driving code.

https://github.com/DeqingSun/CH552-Automatic-Test-Jig

Just let you know the chip has 100ohm resistance at 5V and it will be 50ohm at 12V. But it seems MT8816AP also has a relatively high resistance.