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IXP43X Product Line of Network Processors—Hardware Design Guidelines
Intel
®
IXP43X Product Line of Network Processors
HDG April 2007
66 Document Number: 316844; Revision: 001US
• Use at least one decoupling capacitor per power pin and place it as close as
possible to the pin.
• Minimize the number of traces routed across the air gaps between power islands.
— Each crossing introduces signal degradation due to the impedance
discontinuity.
— For traces that must cross air gaps, route them on the side of the board next to
a ground plane to reduce or eliminate signal degradation caused by crossing
the gap.
— When this is not possible, then route the trace to cross the gap at a right angle
(90°).
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