Re: [SI-LIST] : IBIS for SSTL_2

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From: Scott McMorrow (scott@vasthorizons.com)
Date: Mon Apr 17 2000 - 10:36:31 PDT


DC and Ronnen,

Within the JEDEC DDR committee there is a standard IBIS SSTL I and II
driver model available. It was prepared by IBM, but a number of the
memory vendors also can provide it to their customers. Contact your
favorite memory vendor and see if it is available.

regards,

scott

"D. C. Sessions" wrote:

> Ronnen Lovinger wrote:
> >
> > HI guys,
> > I am looking for IBIS models for SSTL_2 buffers.
> > I am looking in to simulations to decide on the required type of
> > SSTL_2 buffers (Class I or Class II) for my point to point application.
> >
> > Can anyone point out where I can find such models?
> >
> > thanks in advance
>
> As usual, That Depends. If you're looking for IBIS models
> for specific SSTL-2 devices then you'll have to check with
> the vendors. If you mean a generic SSTL-II driver model,
> then at present there aren't any published although the
> EDA companies may have some for use by their customers.
>
> At present the way that the SSTL-2 spec is written there is
> no maximum driver strength, so unterminated SI sims will be
> a bit pessimistic. For most point-to-point applications
> Class I is adequate, but you're right to be careful.
>
> Note: if anyone DOES have an IBIS driver model for SSTL-II,
> the JEDEC committee responsible for SSTL-2 has an action item
> to standardize such a beast. You, too, can be a part of
> industry history.
>
> --
> D. C. Sessions
> dc.sessions@vlsi.com
>
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--
Scott McMorrow
Principal Engineer
SiQual, Signal Quality Engineering
18735 SW Boones Ferry Road
Tualatin, OR  97062-3090
(503) 885-1231
http://www.siqual.com

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