View source for AW9523B GPIO Expander

[[Category:Components and Modules]][[Category:Components]][[Category:AW9523B]][[Category:I²C]][[Category:GPIO]] [[Category:Breakout Board]] {{metadesc|AW9523B GPIO Expander and LED driver}}
While checking the standard parts on JLCPCB, I came across a Chinese [[I²C]] [[GPIO]] extender known as AW9523B ([https://ipfs-pin.com/ipfs/QmQK9XdJ5D8aZySKUs2EvwPcv1q9PFZV9Ao15szbR2BAfK/AW9523B.pdf datasheet]).

These devices essentially operates like any other [[GPIO]] extender (such as the good old MCP23017) but they are really cheap.
While a MCP23017 typically will cost around $1-$2 in small volumes, the AW9523B start around $0.29 ([https://lcsc.com/product-detail/Interface-I-O-Expanders_AWINIC-Shanghai-Awinic-Tech-AW9523BTQR_C148077.html LCSC]).

[[File:AW9523B Pinout.png|400px]]

This part is relatively unknown - at least outside China, but it does have a really interesting feature and that is the ability to drive [[leds]] by controlling the [[led]] current.

[[File:AW9523B Leds.png|400px]]

The AW9523B is only available in a [[QFN]] package and because these are really hard to hand solder, I decided to create a simple breakout board for this part:

[[File:AW9523B GPIO Expander Breakout - schematic without frame.png|800px]]

[[File:AW9523B GPIO Expander Breakout Boards.jpg|400px]]

[[File:AW9523B GPIO Expander Breakout Board.jpg|200px]]