Hi Todd, Thanks for your reply. What do you mean "tool specific" extensions? Are you saying using an Spice like engine with IBIS files? Mike DeVita Staff Engineer, Application Engineering & Characterization VM 480 821-2408 ext 5021 FAX 480 821-1713 EM mike.devita@xxxxxxxxx Todd Westerhoff <twesterh@xxxxxxxxxx> 11/11/2009 11:06 AM Please respond to twesterh@xxxxxxxxxx To Mike DeVita/CHAZ/AAWW@Amkor cc IBIS-ATM <ibis-macro@xxxxxxxxxxxxx>, ibis-macro-bounce@xxxxxxxxxxxxx Subject Re: [ibis-macro] Question on package models Mike, You're correct; the existing IBIS spec for package modeling falls short in the multi-gigabit realm. While there are proposals being discussed to address this; they aren't part of the current spec. In current practice, people are either instantiating package models (usually as S-parameters) in their simulation schematics explicitly, or using tool-specific extensions to IBIS to include a more robust package model. Todd. Todd Westerhoff VP, Software Products SiSoft 6 Clock Tower Place, Suite 250 Maynard, MA 01754 (978) 461-0449 x24 twesterh@xxxxxxxxxx www.sisoft.com Mike DeVita wrote: Hi, How does the IBIS package model (either embedded or stand alone) work with a AMI based link? Is it still expected to provide RLC data coupled and/or uncoupled? I do not think this is sufficient to correctly model the package portion of the channel for use with an AMI block/high speed SERDES. Mike DeVita Staff Engineer, Application Engineering & Characterization VM 480 821-2408 ext 5021 FAX 480 821-1713 EM mike.devita@xxxxxxxxx