Re: [SI-LIST] : Trace Impedance Selection

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From: DORIN OPREA (doprea@newbridge.com)
Date: Thu May 04 2000 - 06:39:40 PDT


XTK simulation shows indeed almost the same signal at the receiver pin, but a
different situation at the driver pin. A higher value of the trace impedance
determines higher overshoot at the driver pin.
This overshoot will generate crosstalk and EMI problems. Note that close to the
driver pin is always a via to get the high speed signal on the internal layers.
This via will amply the effect.

Have fun,



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