PCB layout rules for PCIE, SATA, LAN, LVDS, USB, SDVO, …

robertferanec Hardware design May 27, 2011

Here is a helpful design guide document which describes recommended electrical circuits and PCB layout rules for:

A page example (from the document):

PCI Express routing rules

Don’t get confused. It’s a design guide for COM Express carrier board. Just ignore mechanical and power chapters in the document.

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Published by robertferanec

Published May 27, 2011

Fergulus says:

August 12, 2015 at 9:41 am

Sadly the links are no longer active.

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1. Robert Feranec says:
  
  August 14, 2015 at 9:11 am
  
  Fergulus thank you for pointing this out. I have updated the links, now the links are active again.
  
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Tobias says:

November 24, 2016 at 3:47 pm

Hey Robert,

Iam actually want to design a board which includes SATA, Ethernet und USB3.0. So I want to ask you if the given impedance values in the PICMG COM pdf (https://www.picmg.org/wp-content/uploads/PICMG_COMDG_2.0-RELEASED-2013-12-061.pdf) the right one for these application.

Best regards,
Tobi

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1. Tobi says:
  
  November 24, 2016 at 3:50 pm
  
  I have to add that i have made a short examination to find the right impedance values and I have found always different values e.g. for SATA (100, 90 or 85).
  
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  1. Robert Feranec says:
    
    November 25, 2016 at 4:52 pm
    
    The best is to check your specific chip. Some interfaces may have different impedance values which may depend for example on current version of the interface.
    
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  2. Tobi says:
    
    November 29, 2016 at 8:07 am
    
    Hello Robert,
    
    thank you for your fast replay. I will check my chip in more detail. Maybe I can find the rigth values for the used interfaces.
    
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