D. C. Sessions wrote:
> Kim Helliwell wrote:
> > D. C. Sessions wrote:
> > >
> > > chenlanbing wrote:
> > > >
> > > > HI,
> > > > I'm working on SI.I like to simulate the transmiter line by HSPICE.Now I need the hspice I/O buffer model,such as AMCC 2064.Who can help me?
> > >
> > > The reason that IBIS was developed in the first place is that
> > > semiconductor companies like (to pick one at random) VLSI
> > > Technology keep their process models and to a lesser extent
> > > their circuit architectures very confidential.
> > >
> > > IOW, don't get your hopes up.
> > >
> > On the other hand, I've had reasonable luck getting
> > such models from vendors under an NDA agreement. The
> > ability to do this probably depends on your company's
> > relationship with the vendor; if you buy a lot of
> > their parts, they'll be more willing to accommodate
> > you.
> One thing for sure: it's spotty. A contact at IBM gets
> absolutely EVERYTHING and was amazed that we had a hard
> time getting IBIS models; another contact at a small
> company was impressed at our ability to get anything at all.
> > My feeling is: a vendor should either give you an
> > IBIS model or a SPICE model (subject to an NDA). If
> > they are unwilling to do either, you have to wonder
> > how they expect you to design their parts in.
> Violent agreement.
> > By the way: If you *DO* have an IBIS model, the latest
> > version of HSPICE will read it directly, so you don't
> > have to have an HSPICE model to use HSPICE in that
> > event. You should see the manual for the new version
> > for details. I make no representations as to accuracy,
> > ease of use, etc. I've used it, and I think it's
> > worth a look, anyway.
> Assuming you have access to 98.4, it's reported to be
> massively bug-infested. Many of us *don't* have access to
> 98.4, though -- thanks to Avant's brain-dead support
> groutp, it's all we can do to get new license files for
> the dozen or so copies we have before they expire.
> Asking for license files for upgrades is beyond reason.
> D. C. Sessions
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