Subject: RE: [IBIS-Users] Temperature Range:
From: Peters, Stephen (stephen.peters@intel.com)
Date: Wed Mar 27 2002 - 16:43:07 PST
Hi Bill, Louis:
Actually, IBIS models with a 'min' temperature higher than the 'max'
temperature are perfectly correct, assuming the part being modeled is CMOS.
As explained on pg. 57 of the IBIS spec, the 'min' value of [Temperature
Range] is the value that causes or amplifies the slow/weak condition, while
the 'max' value is the value that causes or amplifies the fastest/strongest
condition. With CMOS, cold is fast & hot is slow. TTL logic is just the
opposite.
Hope this helps.
Regards,
Stephen Peters
Intel Corp.
-----Original Message-----
From: Bill Hargin [mailto:billh@cognitionconsulting.com]
Sent: Wednesday, March 27, 2002 4:28 PM
To: Sanchez, Louis; 'ibis-users@server.eda.org'
Subject: RE: [IBIS-Users] Temperature Range:
Hi Louis:
The spec and your initial example are correct. Mistakes in IBIS models are
a dime a dozen, unfortunately. As a recent thread discussed, many models do
not appear to be validated in simulators before they're released, and a lot
of models have obvious syntactical errors.
Best Regards,
Bill Hargin
Direct: 425-702-0744
Fax: 425-702-0305
Cognition Consulting
Electronic Design Software and Consulting
http://www.CognitionConsulting.com
> -----Original Message-----
> From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org]On
> Behalf Of Sanchez, Louis
> 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
> |------------------------------------------------------------------
> |For help or to subscribe/unsubscribe, email majordomo@eda.org
> |with just the appropriate command message(s) in the body:
> |
> | help
> | subscribe ibis <optional e-mail address, if different>
> | subscribe ibis-users <optional e-mail address, if different>
> | unsubscribe ibis <optional e-mail address, if different>
> | unsubscribe ibis-users <optional e-mail address, if different>
> |
> |or email a written request to ibis-request@eda.org.
> |
> |IBIS reflector archives exist under:
> |
> | http://www.eda.org/pub/ibis/email_archive/ Recent
> | http://www.eda.org/pub/ibis/users_archive/ Recent
> | http://www.eda.org/pub/ibis/email/ E-mail since 1993
>
|------------------------------------------------------------------
|For help or to subscribe/unsubscribe, email majordomo@eda.org
|with just the appropriate command message(s) in the body:
|
| help
| subscribe ibis <optional e-mail address, if different>
| subscribe ibis-users <optional e-mail address, if different>
| unsubscribe ibis <optional e-mail address, if different>
| unsubscribe ibis-users <optional e-mail address, if different>
|
|or email a written request to ibis-request@eda.org.
|
|IBIS reflector archives exist under:
|
| http://www.eda.org/pub/ibis/email_archive/ Recent
| http://www.eda.org/pub/ibis/users_archive/ Recent
| http://www.eda.org/pub/ibis/email/ E-mail since 1993
|------------------------------------------------------------------
|For help or to subscribe/unsubscribe, email majordomo@eda.org
|with just the appropriate command message(s) in the body:
|
| help
| subscribe ibis <optional e-mail address, if different>
| subscribe ibis-users <optional e-mail address, if different>
| unsubscribe ibis <optional e-mail address, if different>
| unsubscribe ibis-users <optional e-mail address, if different>
|
|or email a written request to ibis-request@eda.org.
|
|IBIS reflector archives exist under:
|
| http://www.eda.org/pub/ibis/email_archive/ Recent
| http://www.eda.org/pub/ibis/users_archive/ Recent
| http://www.eda.org/pub/ibis/email/ E-mail since 1993
This archive was generated by hypermail 2b28 : Wed Mar 27 2002 - 17:02:30 PST