RE: typ, min, max condition specification

Hello Bert --

     To answer your second question first: The 'min' data is taken
under the conditions that cause the slowest ristime/weakest drive
while the 'max' data is taken under the conditions that cause the
fastest risetime/strongest drive.

     Your first question is a good one. According to Don Telian
(one of the originators of IBIS) the original intention was to
start with a typical model and then vary the voltage/temp/process
to get a "reasonable" min/max model. The temperature points of
50, 0 and 100 were convienent and spaned a wide temperature range.
There is nothing in the spec that says you can't do it over a
different temperature range, however, it might be good to include a
note in the file saying what temp range your models min and max
were taken at.

        Best Regards,
        Stephen Peters
        Intel Corp.

--------------- original from Bert ------------

>I have studied the IBIS OVerview, Version 1.0. I have the following
>questions concerning "typ", "min", and "max" conditions:
>
>1) Are the specified temperatures the only ones that are allowable?
>Our parts are spec'd at 10C to 105C, should I then be using these
>numbers? Or, does some multidimensional curve fitting mandate certain
>limits? It looks to me that I should do my extractions at my real
>extremes -- right?
>
>2) Relative to the process limits I assume that I chose my slowest
>process data for the "min" condition and the fastest process data for
>the "max" condition?
>
>Thanks ...
>
Received on Tue Feb 8 12:21:40 1994