RE: [IBIS-Users] IBIS Question

Abbey,
 
The IBIS specification is generally trying to not require
things as much as possible.  For example, note that none
of the I-V tables are ***required***, even though it would
make sense to say that a pulldown and pullup I-V table is
required for driver buffers.
 
Similarly, the capability is there for describing the package
parasitics for supply pins.  Whether model makers choose to
provide it or simulation vendors choose to use it is really
not supposed to be a concern of the specification.
 
Arpad
-------------------------------------------------------------

________________________________

From: Abdulrahman Rafiq [mailto:arafiq786@gmail.com] 
Sent: Friday, July 29, 2005 6:03 PM
To: Muranyi, Arpad; ibis-users@eda.org
Subject: RE: [IBIS-Users] IBIS Question



Arpad, 

 

I would tend to agree with you, as pkg parasitic should also be included for POWER and GND pins. Couldn't this be included as a requirement in the IBIS Spec?

 

-Abbey 

 

Abdulrahman Rafiq

arafiq@ucsbalum.net 

________________________________

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Muranyi, Arpad
Sent: Wednesday, July 27, 2005 8:38 AM
To: ibis-users@eda.org
Subject: RE: [IBIS-Users] IBIS Question

 

Andy,

 

The problem is that the IBIS spec doesn't spell out that

the package parameters are also to be applied to power

and GND pins.  In my opinion they should be used for those

too, but it doesn't mean that all tool vendors do it.

 

Arpad

===========================================================

 

________________________________

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Andy Joe
Sent: Wednesday, July 27, 2005 4:18 AM
To: ibis-users@eda.org
Subject: [IBIS-Users] IBIS Question

Hi,

 

I have a question regarding the [Package] keyword in an IBIS file. As far as I am concerned, the RLC values in this section applied to all the I/O pins, my question is if these RLC values also applied to power and ground pins as well? If they are not applied to power and ground pins, how can we address the effects of different packages to the power and ground pins in an IBIS model? (If R_pin, L_pin and C_pin for every single pin are not available, only package min, typ and max RLC are available)

Thanks.

 

-Andy

________________________________

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