USB hub can be used to expand the functionality of a USB-C port, adding ports to your laptop, PC, or gaming system so users can connect other devices or peripherals. Figure 3-1 shows three typical Type-C port expansions with TUSB8044A hub. In this application, the hub upstream port is connected to the USB host. Downstream ports can be used either as a Type-A port or configured as a Type-C DFP port.

1: HD3SS3212 USB3 mux + CC controller:

HD3SS3212 is USB 3.1 SS MUX with 2:1 switching required to handle cable flips. The CC controller determines the orientation of the cable and controls the MUX selection.

2: HD3SS3220

HD3SS3220 has integrated USB 3.1 SS MUX HD3SS3212 and CC controller TUSB322. The device also provides this orientation signal as a GPIO signal DIR that can be used in the system for increased flexibility and features.

3: USB3 redriver mux + PD controller

USB Type-C ports can also be configured to support other data protocols using alternate modes. In theory, a cable maker can create a wire that transmits DisplayPort or HDMI data using the USB-C port. To support Alt mode or power deliver, PD controller is needed together with USB 3.1 redriver mux to achieve full Type-C features.