Silicon Labs EFM8UB31F40G-A-QFN24
Silicon Labs
8051 8-BIT MCU, FULL SPEED USB
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1 77 7280745 https://www.silabs.com/documents/public/data-sheets/efm8ub3-datasheet.pdf 7280745 24-QFN%2520Exposed%2520Pad.jpg
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