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TM4C129XNCZAD Internal vs. External PHY

Akash Patel
Expert 6245 points
Other Parts Discussed in Thread: TM4C129XNCZAD

Hello,

I see that we have several TM4C devices that have integrated PHY and also several that require an external PHY. A few questions that I had:

  1. What are the benefits of using an external vs. an internal PHY?
  2. What are the benefits of having both as options such as there are in the TM4C129XNCZAD?
    1. In which use cases would it be good to have both?

Regards,

Akash Patel

  • 0
    TI__Guru**** 244400 points
    Hello Akash,

    Internal PHY gives a lower BOM cost as other components like decaps, board space and crystal may not be required. As newer lower power PHY are available, having an external PHY would give the advantage of lowering system cost in terms of power and features.

    I know of a few generic use cases for having multiple PHY, but none that has come up on the forum.

    Regards
    Amit