Bevan,

My first question would be why do you believe that you need any termination
to begin with?

Is there anything in the datasheet or the specs on the logic family that
ledd you to believe that termination is required?

JaMi


----- Original Message -----
From: "Bevan Weiss" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Thursday, September 26, 2002 9:52 PM
Subject: Re: [PEDA] OT: termination for a multidrop bidirectional bus


> Hi,
> sorry to ask this question to you guys, but I'm more likely to get an
answer
> from the people dealing with the technology so to speak...
>
> What kind of termination is applicable for a multidrop bidirectional bus
> (using LVTTL signals)??  I've thought about series termination, one for
each
> driver on the bus (however that would total 256 resistors for a 32bit wide
> bus).  Thus it's not my preferred method.  I also would prefer to avoid
> parallel termination (or thevenin equilavent or ac termination for that
> matter) just because they would take up more inter-trace spacing.
>
> I'm sure that many of you have had this kind of situation before and have
> some advice.  It's for a student design project and the deadline is
quickly
> approaching.
>
> Thanks,
> Bevan Weiss

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