Comparing the CP2102 vs. CP2104: Highly-Integrated USB-to-UART Bridge Controllers - Free Online PCB CAD Library
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Pololu - CP2104 USB-to-Serial Adapter Carrier
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CP2104 USB 2.0 to TTL UART 6PIN Module Serial Converter STC PRGMR Replace CP2102 With Dupont Cables - AliExpress
CP2103 Classic USB to UART Bridge - Silicon Labs
Comparing the CP2102 vs. CP2104: Highly-Integrated USB-to-UART Bridge Controllers - Free Online PCB CAD Library