A Thunderbolt system is capable of sourcing USB, DisplayPort, and Thunderbolt data. There is an I²C connection between the TPS65994AD and the Thunderbolt controller. The TPS65994AD will determine the connection on the Type-C port and will generate an interrupt to the Thunderbolt controller to generate the appropriate data output. An external mux for SBU may be needed to mux the LSTX/RX and AUX_P/N signal from the Thunderbolt controller to the Type-C Connector. The TPD6S300 provides additional protection such as short to VBUS on the CC and SBU pins and ESD for the USB2 DN/P. See Figure 9-5 for a block diagram of the system.