The good news is that CH9102F and CP2104 have basically both the same pinout albeit with some small differences that may or may not matter depending on the application, and come in a 4x4mm 24-QFN package (4x4mm) meaning if you run out of CP2104 chips, CH9102F can be used as an alternative, and should be a drop-in replacement.ĬH9102X is pretty similar to CH9102F but offered in a 5x5mm 28-QFN package with extra GPIOs. I had never heard about CH9102 chips before (CH9102F and CH9102X), so I decided to investigate a bit more by checking out both CH9102 and CP2104 datasheets. I’ve just mentioned Silabs CP2104 USB to UART chip price had increased, and indicated WCH CH9102F chip could be used as an alternative instead in a post about LILYGO T-Display boards.
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