Connector for PCI

[Mahler Willi <Willi.Mahler@icn.siemens.de>]

Dear experts,
we are designing a PCI motherboard with standard PC components on it and a subboard for this for user application. The two boards are designed for a 19'' Rack connected to the backplane by a 96 pin connctor to provide power and system signals. The spacing between the two boards is about 20 mm. 

Further, the two boards will be connected by a connector direct from board to board, to provide the PCI bus from the motherboard to the subboard.

My question is, does anybody know a suitable connector to provide the PCI bus from the motherboard to the subboard with a stacking height of about 20 mm?

Further, I found a connector from AMP (Centerline Matched Impedance Connector - MICTOR) with the stacking high and amount of pins necessary. The connector is matched to the impedance of about 50 ohms. Is this a problem to use this connector for PCI bus, or is it no problem, because the pcb are in a range of 60-80 ohms of impedance, and so it doesn't matter?

It would helpful to get any suggestions on my problem.

Best regards
 
Willi Mahler
Siemens AG
DC HS
Werner-von-Siemens-Str.2-6
76646 Bruchsal
Tel. +49 7251 73 3330
Fax. +49 7251 73 3720
mailto:willi.mahler@icn.siemens.de