Aaron, That depends completely on the model provider. I would be very suspicious however, if one is giving out models with L+M and C+CM added together. One more thing to watch out for is whether the inductance reported is partial or loop inductance - in places where mutuals are absolutely not provided, using loop inductance might be a better idea that partial inductance, though. A general caution: if you think ground bounce and crosstalk in the package is significant, then using the IBIS models could be very inaccurate to say the least. I suggest you obtain a SPICE model of the package from your vendor, attach it to a driver IBIS model with the RLC zeroed out, and perform the simulation. Good luck, Neeraj -- National Semiconductor Corporation 2900 Semiconductor Drive, M/S 19-100 Santa Clara, California 95051 http://www.national.com/, NYSE: NSM > Aaron Frank wrote: > > Hello IBIS Experts, > > Can somebody tell me whether mutual and self L and C are summed for lumped > RLC parameters in IBIS models (under [Pins]) or are just the self L & C > reported? > > thnx > AAron > > ************************************* > Aaron Frank, P.Eng. > SiberCore Technologies > email: aaron@xxxxxxxxxxxxx > ************************************* ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu