UART
CH340 USB to Serial Converter IC
The CH340 is a popular IC that is a bidirectional USB to Serial converter IC, used to convert USB signals into UART, which can be used to communicate with microcontrollers.
FT230X USB to UART Interface IC
The FT230X is a USB to UART interface IC with an optimized pin count for smaller PCB designs.
CP2102 UART Module
CP2102 UART Module integrated with CP2102 IC from SiLabs, which is a single-chip USB to UART Bridge IC.