Subject: RE: [IBIS-Users] Temperature Range:
From: Sanchez, Louis (louis.sanchez@intel.com)
Date: Wed Mar 27 2002 - 16:14:38 PST
Hi..............
I want to thank all who responded. These inputs cleared up my confusion.
Thanks,
Lou A. Sanchez
-----Original Message-----
From: Mirmak, Michael
Sent: Wednesday, March 27, 2002 4:03 PM
To: Sanchez, Louis; 'ibis-users@server.eda.org'
Subject: RE: [IBIS-Users] Temperature Range:
Louis,
The {Temperature Range] keyword values are ordered depending on conditions,
not on numerical value (unlike C_comp). In other words, your "min"
temperature value corresponds to the temperature used to get the "min" data,
not the smallest numerical temperature in your range.
Section 9 of the specification details Data Derivation methods and points
out that, for CMOS processes, "min" corner usually corresponds to high
temeratures, while the "max" corner corresponds to low temperatures.
Bipolar technologies, on the other hand, typically show association between
"min" corner and low temperature, etc.
While not so noted, I believe the spec example refers to a bipolar buffer.
I hope this helps!
- Michael Mirmak, Intel Corp.
-----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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