[SI-LIST] Re: Terminating a branched clock line
- From: "Ravinder Ajmani" <ajmani@xxxxxxxxxx>
- To: kevinlfitzgerald@xxxxxxxx
- Date: Fri, 12 Apr 2002 10:10:24 -0700
Kevin,
You should place one source termination near the clock source, before the
branch. The impedance of the trace from source up to branch point should
be 25 ohms. The source termination should match the clock driver output to
25 ohms line.
Regards, Ravinder
PCB Development and Design Department
IBM Corporation
Email: ajmani@xxxxxxxxxx
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"kevinlfitzgerald
" To: si-list@xxxxxxxxxxxxx
<kevinlfitzgerald cc:
@yahoo.ca> Subject: [SI-LIST] Terminating
a branched clock line
Sent by:
si-list-bounce@fr
eelists.org
04/12/2002 08:11
AM
Please respond to
kevinlfitzgerald
Hi,
I have a clock signal with a 1ns rise time which is distributed to 2
parts. The 50 Ohm lines are matched length within +/-50 thou after
the branch. Our concern lies with the source termination. Should the
source termination be before the branch, or immediately after the
branch ?
Any thoughts,
Thanks,
Kevin
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