[SI-LIST] : routing problems

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From: niels_frommann@hp.com
Date: Thu Apr 06 2000 - 16:42:37 PDT


     Hello list,
     
     I'm routing a Ethernet/PCI board and I'm running out of space. I'm
     facing two alternatives:
     
     - routing PCI signals with targeted impedance of 60 to 100 Ohm on
     Ethernet layers with 50 Ohm impedance. Does anyone know how PCI's
     reflective waveform switching behaves at 50 Ohm?
     
     - adding two layers to my stackup. If I end up adding two layers, can
     anyone recommend a stackup for PCI and Ethernet signals?
     
     Thanks,
     
     Niels.

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