Difference between revisions of "AW9523B GPIO Expander"
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[[Category:Components]][[Category:AW9523B]][[Category:I²C]] [[Category:GPIO]] [[Category:Breakout Board]] | [[Category:Components]][[Category:AW9523B]][[Category:I²C]] [[Category:GPIO]] [[Category:Breakout Board]] | ||
| − | 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. | These devices essentially operates like any other [[GPIO]] extender (such as the good old MCP23017) but they are really cheap. | ||
Revision as of 03:46, 4 June 2021
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:
