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Is this correct? Is it good?

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  • Is this correct? Is it good?

    hi

    Is this routing appropriate? Click image for larger version

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  • #2
    For power pins (including GND) I always try to have 1 through hole via per pin. Only if not possible (e.g. no space on bottom for components), only then I can connect more than 1 power pin to 1 via. So, personally, I would not route it that way.

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    • M. Namvar
      M. Namvar commented
      Editing a comment
      thank you
      another question: can I connect the power pins to a power plane with uVia? I mean why do you use through-hole via and go to the bottom layer?

  • #3
    robertferanec do you still have access to that simulation tool from Keysight?
    What is the effect of multiple pads per single via (like this BGA and with multiple capacitors).
    Or a structure like in the picture below...
    Click image for larger version

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    • #4
      What is the effect of multiple pads per single via (like this BGA and with multiple capacitors).
      - it is a lot about inductance

      I would recommend you to watch my Decoupling capacitor youtube video series to understand how important it is to keep connections of capacitors short:
      https://www.youtube.com/playlist?lis...uvkR_TjpnF1Z7f

      Very simply to say, if you have a capacitor which is connected by a long track, it is not going to do good. Therefore you would like to have as short connections from pads to vias as possible.

      I know this doesn't answer you question directly, but, there is no really reason to simulate it as I would not recommend to use it for the reasons above.

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      • #5
        can I connect the power pins to a power plane with uVia?
        - occasionally I do that (if there is no other way), but through hole via connection is better for powers.See my answer below ..

        I mean why do you use through-hole via and go to the bottom layer?
        - through hole via provides better connection (lower inductance, higher currents possible, ....) comparing to the uVIAs which I use.

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        • M. Namvar
          M. Namvar commented
          Editing a comment
          thank you very much
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