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HD3SS460: why the polarity is reversed? CRX2N - CRX2P

Part Number: HD3SS460


We want to achieve this function, we are implementing DP and USB3.0, as shown below:

I found HD3SS460, please help to determine if it can be realized? Or it have a better solution.

In addition, I found HD3SS460EVM, and found such a connection in the schematic diagram of the user manual, as shown in the figure below, but why the polarity is reversed? CRX2N - CRX2P


Elsa Duan

  • Elsa

    The differential pairs were inverted on the Type-C side of the HD3SS460 (this practice is just an example and depends on the implementation, for a better layout design if it is needed.), and thus in order to compensate such inversion, the differential pairs were inverted again on the DP side. Meanwhile USB specification allows polarity inversion, that’s why there is no need to invert the SSTX & SSRX differential pairs.