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RE: 2 layers or more



ÿþ<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=unicode" http-equiv=Content-Type> <META content="MSHTML 5.00.2314.1000" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT size=2>Someone has wrote that in a two layers PCI board the trace with must be, at least, 0,75mm (30mil) because "the unloaded characteristic impedance of the shared PCI signal traces on the expansion card shall to be in the 60 to 100 Ohm range". If it is right&nbsp;and I keep the PCI trace length specifications (max 1.5 inches for PCI Signals and 0.25 inches for decoupling capacitors) and I run a ground trace all the way along next to&nbsp;every 2 signal traces, ¿really do you think that is posible to route this board?</FONT></DIV> <DIV>&nbsp;</DIV> <DIV>&nbsp;</DIV> <DIV><FONT size=2>Iñigo Alvarez Ximenez de Embun<BR>e-mail: <A href="mailto:patxipatxi@jazzfree.com">patxipatxi@jazzfree.com</A></FONT></DIV></BODY></HTML>