Difference between revisions of "AW9523B GPIO Expander"
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| − | [[Category:AW9523B]] [[Category: | + | [[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 [[ | + | 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 GPIO Expander Breakout Board.jpg]] | + | [[File:AW9523B Pinout.png|400px]] |
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| + | 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. | ||
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| + | [[File:AW9523B Leds.png|400px]] | ||
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| + | 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: | ||
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| + | [[File:AW9523B GPIO Expander Breakout - schematic without frame.png|800px]] | ||
| + | |||
| + | [[File:AW9523B GPIO Expander Breakout Boards.jpg|400px]] | ||
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| + | [[File:AW9523B GPIO Expander Breakout Board.jpg|200px]] | ||
Latest revision as of 03:23, 2 June 2022
While checking the standard parts on JLCPCB, I came across a Chinese I²C GPIO extender known as AW9523B (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 (LCSC).
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.
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:
