[SI-LIST] PMC connector with no ground returns

  • From: Steve Mercer <SMercer@xxxxxxx>
  • To: si-list@xxxxxxxxxxxxx
  • Date: Mon, 1 Mar 2004 19:03:36 -0500

SI-List Members,
I have an application that requires using all 64 available pins on a PMC
connector for data signals (i.e. no local ground returns). The signals are
3.3V single-ended data lines with a rise time on the order of 1ns. The data
will be sampled at 133MHz. The connector in question will be one of a
grouping of four (in a standard PMC arrangement) and the other three
connectors have plenty of ground pins.
My question is this: What nightmares can I expect with regard to crosstalk,
ground bounce, EMI, and signal integrity in general, and how much will the
available grounds on the adjacent connectors lessen the undesirable effects?
Steve Mercer, P.Eng.
SBS Technologies (Canada), Inc.
101 Randall Dr.                    Phone (519) 880 8228
Waterloo ON                       Fax     (519) 880 8118
N2V 1C5                               smercer@xxxxxxx

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:

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List technical documents are available at:

List archives are viewable at:     
or at our remote archives:
Old (prior to June 6, 2001) list archives are viewable at:

Other related posts: