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WCH CH340C

Greg Cormier requested to merge github/fork/gcormier/ch340c into master

CH340C is a crystal-less variant of the CH340G. It is identical, other than the crystal pins for the G now being no connect.

Violation - Some inputs are on the right. I intentionally kept the exact same layout for the symbol as the G series, as I felt if a designer wanted to switch to the C variant, it would require no changes to the connections in the KiCad schematic - delete the G, drop in the C.

Datasheet in Chinese unfortunately : https://datasheet.lcsc.com/szlcsc/Jiangsu-Qin-Heng-CH340C_C84681.pdf

New CH340C: image

Existing CH340G: image

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