RE: [SI-LIST] : CRIETERIA FOR CHOOSING VALUE OF Z0

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From: ruston, matt (ruston_matt@emc.com)
Date: Tue May 22 2001 - 13:45:49 PDT


Chandan:

 Hi. Check out http://www.ednmag.com/ednmag/reg/2000/09142000/19john.htm
It may help a bit.

Matt

-----Original Message-----
From: Chandan [mailto:chandan_career@yahoo.com]
Sent: Tuesday, May 22, 2001 1:05 PM
To: SI FORUM
Subject: [SI-LIST] : CRIETERIA FOR CHOOSING VALUE OF Z0

Hi Everybody,

On all the motherboards that I have designed, the
chipset vendors specify the characteristic impedance
of the traces of the various signals involved. For
example, Intel specifies a value of 60 ohms for their
440BX chipset.
In the absence of such recommendations, on what basis
do I choose the value of characteristic impedance for
my traces?

Thanks,
Chandan

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