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SparkFun (PID 13830 USB UART Serial Breakout -
The USB to UART serial breakout is designed to provide users with a means to access all available I/O pins on the IC, and to provide a 6-pin UART header that is compatible with other SparkFun breakout boards. This breakout has a microUSB connector and other support circuitry to get the IC quickly up and running. The breakout is equipped with a micro-B USB port, USB signal lines, a VIO selection jumper, a low-voltage selection jumper, and a multitude of pins that allow you to utilize the board to its fullest potential. The breakout is capable of operating at both 3V and 5V based on what the VIO selection jumper is set to. Additionally this breakout can operate at 2V and

Price is $21.00
Price: $20.95