RE: [SI-LIST] : Non-standard bus termination (2nd posting)

Ingraham, Andrew (Andrew.Ingraham@compaq.com)
Wed, 22 Sep 1999 13:45:10 -0400

Depending on your choice of drivers, you might not need to add any new
termination components. If the driver's output impedance matches that of
the line, and if it's reasonably point-to-point, then you already have
effective series termination. Even if it's not matched but in the right
ballpark, it might be adequate on its own.

On the receiver end, the clamp diodes that are built into many logic
families can be effective at cleaning up SOME amount of overshoot due to
imperfect termination. But be careful not to exceed the ratings of those
clamps, and take into account what happens when all traces overshoot at the
same time.

Andy

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