Hi! Related to this question, is it good enough to represent the on-chip parasitics with just a C_comp ? How about R and L ? I had a case with one vendor about their receiver model: for some of the pins, the on-chip parasitics are even bigger compared with packaging RLCs. I was told that these on-chip parastics represent routing parasitics from C4 pads to the actual receiver; Wondering how IBIS model take these into account ? Thanks Perry "Muranyi, Arpad" wrote: > 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 > > __________________________________________________ > Do You Yahoo!? > Check out Yahoo! Shopping and Yahoo! Auctions for all of > your unique holiday gifts! Buy at http://shopping.yahoo.com > or bid at http://auctions.yahoo.com > ------------------------------------------------------------------ > 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 > > ------------------------------------------------------------------ > 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 > -- Perry Qu Product Integrity | 600 March Road Alcatel Canada | Ottawa, ON K2K 2E6, Canada DID: (613) 7846720 | FAX: (613) 5993642 ------------------------------------------------------------------ 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