Re: [SI-LIST] : IBIS models

Scott McMorrow (scott@vasthorizons.com)
Thu, 26 Aug 1999 15:44:40 -0700

This is a multi-part message in MIME format.
--------------F9EAE6AD0467996A95CF3001
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Dan,

Unfortunately for commodity parts, we signal integrity engineers
often have little leverage. And ... for the same device family, different
vendors often have vastly different input and output characteristics.
Sometimes we just have to design for the worst of the worst
cases, since purchasing managers will often switch vendors due to
cost and availability in mid product life.

regards,

scott

--
Scott McMorrow
Principal Engineer
SiQual, Signal Quality Engineering
18735 SW Boones Ferry Road
Tualatin, OR  97062-3090
(503) 885-1231
http://www.siqual.com

Dan Bostan wrote:

> I even go one step further : if I have an alternative, I do not design > around a component that can not be satisfactorily simulated ( for the lack > of a good model, for example...). > So, in other words, I use the power of the $ leverage. > > Dan Bostan > Engineer > Corvia Networks e-mail: dan@corvia.com > 212 Gibraltar Dr. ph: 408.752.0550/x111 > Sunnyvale, CA 94089 fax: 408.752.0551 > > ----- Original Message ----- > From: Kim Helliwell <khelliwe@acuson.com> > To: <si-list@silab.eng.sun.com> > Sent: Thursday, August 26, 1999 3:10 PM > Subject: Re: [SI-LIST] : IBIS models > > > Yep! TI's the one, but I wasn't going to say so! > > > > At least, TI gives you a model for each type of pin; > > some vendors don't even do that much. I recently saw > > a model that only gave the output buffer model, but > > no input buffer model (even though there were input > > pins). > > > > But you're right: we should gripe the manufacturers about > > these bad modeling practices. > > > > > > > > Mike Mayer wrote: > > > > > > Thanks for the replies to the IBIS [Pin] question. The manufacturer in > > > question is TI. I have let them know that the IBIS spec requires them > > > to specify every pin. Although I am grateful for the fact that there > > > is a model available at all, I also feel that unless I speak up about > > > the shortcomings of models the situation will never improve. > > > > > > -- > > > > ============================================================================ > = > > > Mike Mayer Artesyn Communication Products, > Inc > > > Madison, WI > > > http://www.artesyn.com/cp > > > > ============================================================================ > = > > > > > > **** To unsubscribe from si-list: send e-mail to > majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE > si-list, for more help, put HELP. si-list archives are accessible at > http://www.qsl.net/wb6tpu/si-list **** > > > > -- > > Kim Helliwell > > Senior CAE Engineer > > Acuson Corporation > > Phone: 650 694 5030 FAX: 650 943 7260 > > > > **** To unsubscribe from si-list: send e-mail to > majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE > si-list, for more help, put HELP. si-list archives are accessible at > http://www.qsl.net/wb6tpu/si-list **** > > > > > > **** To unsubscribe from si-list: send e-mail to majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list ****

--------------F9EAE6AD0467996A95CF3001 Content-Type: text/x-vcard; charset=us-ascii; name="scott.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Scott McMorrow Content-Disposition: attachment; filename="scott.vcf"

begin:vcard n:McMorrow;Scott tel;work:503-708-4320 x-mozilla-html:FALSE url:www.siqual.com org:SiQual, Signal Quality Engineering adr:;;18735 SW Boones Ferry Road;Tualatin ;OR;97062-3090;USA version:2.1 email;internet:scott@vasthorizons.com title:Principal Engineer note:asdfsdaf fn:Scott McMorrow end:vcard

--------------F9EAE6AD0467996A95CF3001--

**** To unsubscribe from si-list: send e-mail to majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list ****