At 10:01 AM 5/4/2005 -0500, you wrote:

>marginal at best.
>
>232 can run up to +/- 24V, with large transients. The transmission gates 
>won't appreciate that at all.
>
>You're better off to convert to TTL/CMOS levels first, then do your 
>transmission gates, or logic based solution inside the buffers.

He *could* use MOSFET-based SSRs, and it would work reliably, but it would
be more expensive.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com




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