RE: [IBIS-Users] Re: How and where Alternate Package Models of IBIS Version 4.x gets used?

Siva,
 
In your comments, you imply that you are including the package when
extracting the [Model] I-V and transient waveform information for your
buffers.  I would hope that this is not the case.  
 
The IBIS structure assumes that the buffer information is extracted
separately from the package.  Multiple package model sets, through the
[Alternate Package Model] keyword, therefore enable users of the IBIS
file for the component to use one set of buffer models with multiple
package designs.
 
- Michael Mirmak
  Intel Corp.
  Chair, EIA IBIS Open Forum

________________________________

From: Siva Nageswara Rao Borra [mailto:siva@india.nsc.com] 
Sent: Thursday, September 07, 2006 01:32
To: Mirmak, Michael
Cc: Siva Borra; ibis-users@eda.org; deepti@india.nsc.com
Subject: Re: [IBIS-Users] Re: How and where Alternate Package Models of
IBIS Version 4.x gets used?


Hi Michael,

                 Thank you very much.
While obtaining data for Pullup,Pulldown and waveform data,
we can consider only one package,  the how would be the  extra package
information is useful to the user?

Regards,
Siva Borra. 

Mirmak, Michael wrote:


	Siva,
	
	The alternate package keywords simply enable model authors to
reference
	different package electrical descriptions for components that
feature
	identical buffer designs.  For example, a component that is
available in
	both DIP and surface-mount packages could be represented using
one IBIS
	file.  This file would contain the buffer information in the
appropriate
	[Model] keywords and include one set of package information
under the
	[Package Model] keyword.  Electrical data for any other
available
	package designs could be referenced under the [Alternate Package
Model]
	keyword.
	
	- Michael Mirmak
	  Intel Corp.
	  Chair, EIA IBIS Open Forum 
	
	-----Original Message-----
	From: owner-ibis-users@server.eda.org
	[mailto:owner-ibis-users@server.eda.org] On Behalf Of Siva
Nageswara Rao
	Borra
	Sent: Tuesday, September 05, 2006 00:20
	To: ibis-users@server.eda.org
	Cc: Siva Nageswara Rao Borra; deepti@india.nsc.com
	Subject: [IBIS-Users] Re: How and where Alternate Package Models
of IBIS
	Version 4.x gets used?
	
	Hi Expert,
	
	  

		               Can anybody give a clarity on how the 
		additional/alternate package models are helpful
		and also how they can be supplied?
		This is regarding the [Alternate Package]/[End
Alternate] Package 
		models, available on IBIS version 4.x.
		
		Thanks in advance for your support.
		
		With best regards,
		Siva Borra.
		
		
		    

	
	
	
	
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