From: "Christopher R. Carlen"
Subject: Re: Need advice wiring up a CPLD
Date: Thu, 03 Oct 2002 12:02:31 -0700
Organization: Sandia National Laboratories, Albuquerque, NM USA
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> "Christopher R. Carlen" wrote in message
>>Oh, one other important thing! The CPLD runs at 3.3V, so I need level
>>Thanks for your interest.
> If you're using buffers you might want to consider using 74LVC4245A level
> shifting buffers from Philips, that way you can drive from the PLD 3.3V
> logic and be able to select 3.3V or 5V CMOS levels on your outputs.
Hmm, in this case there is zero likelyhood of having to output 3.3V
What is the likelyhood that commercial instruments in the next few years
will have user inputs that are 3.3V level instead of 5V TTL compatible
There are so many logic levels these days, it makes sense to keep the
external world interface standardized on one thing, so all instruments
can talk to each other. 5V works for me. I hope it stays that way.
Thanks for your input!
Christopher R. Carlen
Principal Laser/Optical Technologist
Sandia National Laboratories CA USA