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  1. #1
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    SATA PCB layouts in GERBER, PDF or any CAD software

    Hi there,

    I need SATA PCB layouts in GERBER, PDF or any CAD software. I am intending to add SATA HDD support to my OMAP via USB 2.0 interface. I am planning to use JM20339, but the manufacturer lacks of the PCB guidelines.
    I would be thankful if you send/point to me any source of information about the specifics of the SATA design.

    Thank you in advance
    Drago

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  2. #2
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    Re: SATA Layouts needed

    I was going to list a few but please use these terms and type into google

    sata layout design guide
    There are ones from intel and also some from Xilinx and Altera in those results.

    All are based on specific stackups and your most critical choices will be materials for your substrates and choice of widths and spacings for your pairs and do keep inter pair skew to a minimum.

    :F



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  3. #3
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    SATA Layouts needed

    I do agree that the stackup is the most important, since the dielectric thickness is directly related to the differential impedance of the pair!
    Why the substrate is so critical? Aren't they all using FR4?



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  4. #4
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    Re: SATA Layouts needed

    Quote Originally Posted by Drago
    I do agree that the stackup is the most important, since the dielectric thickness is directly related to the differential impedance of the pair!
    Why the substrate is so critical? Aren't they all using FR4?
    Depending on the substrate used, the surface is not always even, so choice of pre-preg can be quite important especially if you are using very thin distances between the trace and ref plane and also chane on Er and V depends on length of tracks you route also.

    :F.



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