Subject: RE: [IBIS-Users] Temperature Range:
From: Lynne Green (lgreen@cadence.com)
Date: Wed Mar 27 2002 - 16:12:16 PST
Hello, Louis,
This is described in the IBIS 3.2 spec:
| The optional [Temperature Range] keyword will contain the temperature which
| causes or amplifies the slow, weak conditions in the "min" column and the
| temperature which causes or amplifies the fast, strong conditions in the
| "max" column. Therefore, the "min" column for [Temperature Range] will
| contain the lowest value for bipolar models (TTL and ECL) and the highest
| value for CMOS models.
You are probably seeing some CMOS models and some bipolar models.
- Lynne
-----Original Message-----
From: Sanchez, Louis [mailto:louis.sanchez@intel.com]
Sent: Wednesday, March 27, 2002 3:41 PM
To: 'ibis-users@server.eda.org'
Subject: [IBIS-Users] Temperature Range:
Hello..............
I have a question regarding the proper format to use for the IBIS model
keyword:[Temperature Range]. According to version 3.2 of the EIA IBIS
Standard, the format is: typ, min, and max. The example given on page 29 of
the referenced standard is: typ: 27.0, min: -50, max: 130.0. Yet, I have
seen IBIS models from various sources that specify the min temperature as
high, in this case 130; and the max temperature as low, in this case -50.
Can someone comment on what the proper entry should be? I tend to believe
the standard, but I have seen so many IBIS files with the min and max
entries reversed that I just had to ask.
Thank You,
Louis A. Sanchez
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