Re: [SI-LIST] : Bad IBIS models!

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From: Mike LaBonte (mikelabonte@cadence.com)
Date: Thu Mar 16 2000 - 05:54:32 PST


There is an IBIS Support page at http://www.eia.org/EIG/IBIS/support.htm
announcing the FREE Model Review Service:

     IBIS Model Review: If you are developing an IBIS model and would like to
     have your model reviewed, you may send your model to this address. This is a
     confidential and FREE service provided by the IBIS Model Review committee
     comprised of a number of EDA vendors. Feedback about the model will only
     be passed to the requestor of this service. Model Review Service is intended
     for use by IC MANUFACTURERS ONLY !(large or small).

The page has a hotlink for the email address. Hopefully IC vendors are using
repeatable processes to develop IBIS models, so only a small sampling submitted
for review could really pay off.

Mike LaBonte

Stephen Nolan wrote:
>
> SI-List,
>
> What, exactly would be the QC steps that you would like to see component vendors
> ensure that their models pass, prior to release?
>
> What I've gleaned so far:
>
> - Validate to IBISCHK3 and document exceptions to warnings.
>
> - Validate all curves with a visual graphing for discontinuity, or other
> visually obvious errors.
>
> - Validate that the VI curves pass through origin.
>
> - Verify that a full pin map exists and is accurate against datasheet.
>
> - Verify that all models exist.
>
> - Validate accuracy of package parastics.
>
> - Validate accuracy of dV/dt. Use 50 ohm load or datasheet load?
>
> - Include and validate accuracy of C_comp, including min and max.
>
> - Include 4 VT curves minimum. Use 50 ohm load or datasheet load?
>
> - Include accurate Min, Typ, Max data, derived from a setup that has full
> variation across PVT.
>
> What else? Thanks.
>
> --
> Regards,
> Stephen M. Nolan
>
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