[SI-LIST] Re: Cin in IBIS models

Bob,

The C_comp capacitance must represent what you see when you look into
the die at the die pad.  This includes the die pad, metal connections
on the die, the driver transistor's capacitance, the receiver (input)
capacitance, everything that is on the die.  Package, pin, ball, and
other stuff is modeled in the package model section of the IBIS model.

Arpad Muranyi
Intel Corporation
======================================================================

-----Original Message-----
From: Bob Patel [mailto:whizplayer@xxxxxxxxx]
Sent: Monday, December 17, 2001 10:27 AM
To: si_list
Subject: [SI-LIST] Cin in IBIS models



Hi! Is the input capacitance for a pin included in the
IBIS models, I know the pad capacitance is by using
C_comp. Also, when using output buffers do I have to
model the output capacitance as an external capacitor
and the input capacitance as an external capacitor.
Thanks in advance
Bob

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