This is the third and final galvanic insulator in my little series. It provides an insulated UART with TTL levels. It was tested up to 256K baud. It is built up with a FT232R for the UART and an ADum5241 does the insulation. The datasheet states that it can do up to 2Mbit. The LED is supplied by the ADuM5241s insulated power supply that can provide up to 10mA at 5V. Simple pinout. R=RxD, T=TxD, G=GND.