A typical application of the TUSB1104 device is shown in Figure 2-1. The device can be configure either through its GPIO pins or through its I2C interface. In the following example, a Type-C PD controller or microcontroller is used to configure the device through the I2C interface. In I2C mode, the equalization settings for each receiver can be independently controlled through I2C registers.

For pre-channel A to B PCB trace length Xab, a good rule for FR4 trace insertion loss at 5 GHz is ≈-1 dB per inch. If Xab is 8 inches, the TUSB1104 SSEQ should be programmed to -8 dB. For post-channel C to D PCB trace length Xcd, TUSB1104 will determine the best settings regardless if the channel is short, long or somewhere in between with fully Adaptive EQ setting.