Re: min typ & max, explained (I hope)

Hi Matt,

At 10:46 AM 3/23/00 -0600, Matt Callicoat wrote:
>I'm a little confused about the definitions of min, typ, and max in the
>ibis specifications. In some cases, it seems to simply mean the
>smallest, middle, and greatest numerical values, respectively. But in
>other cases it seems to refer to slow, typical, and fast, respectively.
>For a CMOS circuit, I believe the convention is as follows:

Min typ and max are used consistently in IBIS as refering to the
parameter they describe. For example: C_comp min,typ,max are the
min,typ,max manufacturing tolerance values that describe C_comp.

For the purposes of choosing a SLOW or FAST process the choice of
which min's and max's to use together is not specified by IBIS. It is
the responsibility of the user together with the simulator to select
the choice of combinations that would say describe the slowest or fastest
output edge rate.

There have been a few discussions in the past about specifying which
combinations are to be used for some of the corners but we could not
agree about how many corners there should be or what parameters they
should be. We ultimately decided to leave this to the simulators and
end users.

best wishes..
Kellee

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Have a great day....
Kellee Crisafulli
HyperLynx, a division of Pads Software Inc.
SI,EMC,X-talk and IBIS tools for the Windows platform
E-mail: <mailto:kellee@hyperlynx.com>
web:   <http://www.hyperlynx.com>
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Received on Thu Mar 23 09:49:25 2000