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Figure 16.
Trace Segment Length
5.4.4
Trace Mismatch and Compensation
The following rules describe how to handle trace mismatch (see
Figure 20
• If the trace segment between the bend corners is greater than 600 mils, adjust the
mismatch to be less than 1 mil. See
• Match the overall length of a differential pair within 5 mils.
• Match the overall length between two adjacent differential pairs within 1000 mils.
• All trace segments must be matched within 2 mils.
• Adjust the trace length near the mismatch. See
• The length compensation must be performed by working on a unified direction (a
north to south or south to north, but not both).
Figure 17.
Trace Mismatch
®
Intel
EP80579 Integrated Processor Product Line
Platform Design Guide
46
®
Intel
EP80579 Integrated Processor Product Line—High-Speed Design Concerns
Equalization Length of
Segments
for additional examples):
Escape Routing
M aintain the Lateral Symmetry
for Traces
Figure
18.
Figure
17.
* Watch out for
the length reporting issues in
Allegro and other routing tools.
Trace Length Adjusted Near Mismatch
Order Number: 320068-005US
Figure 19
and
May 2010
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