The main advantage of CP2102 is that no extra external components are required. CP2102 is a cheaper alternative to the costlier ftdi FT232 IC but cp2102 is a bit difficult to solder as it comes in QFN-28 package and is very small (just 5mmx5mm) in size. It is my favourite converter IC and I have been using USB to RS232 module and USB to TLL modules based on CP2102 for couple of years without any issues. Round Shell Connector/Aviation ConnectorĬP2102 is a USB to UART IC from Silicon Labs.