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Original question:

TUSB501: Wiring schematic for USB 3.0 redriver

TUSB501: PCB layout for USB 3.0 redriver

Gang Feng
Prodigy 30 points
Part Number: TUSB501

In a project I am working on I need to use a USB 3.0 redriver TUSB501.  In a PCB layout guideline given by TI ( http://www.ti.com/lit/an/spraar7g/spraar7g.pdf 

wondering if we should  void the reference plane below the pads of TUSB501 as well.  I have seen on a reference design that people did this for AC coupling capacitors and EMI chokes, but not for the redriver.   I am wondering if I am overthinking. Thanks!

  • 0
    Prodigy 30 points
    Sorry, my original post missed a few sentences. Here is what I wanted to ask.

    In a project I am working on I need to use a USB 3.0 redriver TUSB501. The PCB layout guideline given by TI ( www.ti.com/.../spraar7g.pdf ) suggested voiding the reference plane right below any surface mounted pads (see Figure 20 in the document). The document mentioned specifically for AC coupling capacitors. Since TUSB501 is also a surface mounted part, I am
    wondering if we should void the reference plane below the pads of TUSB501 as well. I have seen on a reference design that people did this for AC coupling capacitors and EMI chokes, but not for the redriver. Please let me know if I am overthinking. Thanks!
  • 0 in reply to Gang Feng
    TI__Guru**** 176186 points
    Gang

    You don't have to void the TUSB501. Please make sure you follow the GND pad recommendation in the datasheet.

    Thanks
    David