[SI-LIST] : which layers should I use for routing my high speed traces

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From: Saeen Malik (saeens@hotmail.com)
Date: Mon May 07 2001 - 11:37:40 PDT


I have the following stackup. I need to route 644 MHz. PECL signals. Which
layers should I use

------------------ gnd
      ---- route layer 1
------------------ gnd
      ---- route layer 2
      ---- route layer 3
------------------ peclpower
      ---- route layer 4
      ---- route layer 5
------------------ gnd
      ---- route layer 6
------------------ gnd

My inclination is to use layers 2,3 and 4,5 because it would provide return
path for
both cases - switching high and low. On the other hand if I use the single
stripline layers,
the return current when the device switched high would have to go through a
cap to enter the power
pin.

What do you people think???

Saeen
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