Re: In search of a better line driver

From: Nico Coesel (nico_at_puntnl.niks)
Date: 06/05/04 

Date: Sat, 05 Jun 2004 23:41:10 GMT

Chris Carlen <crobc@BOGUS_FIELD.earthlink.net> wrote:

>Hi:
>
>Here are some of the ways I have driven 50 ohm coax cables with TTL
>level logic signals:
>
>1. I have used 74HC14, 74AC14, and 74ACTQ14 devices to drive 50ohm
>cables, with reasonably good results. I have tended to use one gate in
>the package to drive several others in parallel, with a back terminating

You could take a look into RS485 drivers. These can drive 50 Ohm loads
(2 times 100 Ohms in parallel on the bus = 50Ohm load) and these are
also available in several slew rate limited editions... ehmmm versions
that is. 

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