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HD3SS3212: TIDA-01243 INTENTIONALLY SWAPPED

Jinwook Baek
Prodigy 50 points

Part Number: HD3SS3212
Other Parts Discussed in Thread: TIDA-01243,

Tool/software:

Hi, I have a question in the reference schematic of TIDA-01243.

Why is the +/- in the HD3SS3212 mux output on sheet 9 reversed? --> intentionally swapped

Plz, let me know about this.

  • +1
    TI__Guru**** 189201 points

    Hi,

    The polarity swap is done to ease the PCB signal routing. It is OK to swap the polarity as the HD3SS3212 is a passive switch so the inversion does not affect its functionality and USB3 spec allows the polarity inversion, it detects and compensates the swapping during the link training. 

    Thanks

    David