Agreed, I think point was not that logic design is obsolete, rather certain logic families are.
hi Mike,
The word 'obsolete' in my understanding is, no longer in production, not that they will no longer do the job for which they were originally designed.
Like many other members I have lots of these 'obsolete' devices in stock and if they meet the project specification, I will use them.
As we are lucky enough to live in countries which have all the latest technology available, we tend to forget others are still having to use 8051, 741, TTL555's and the old 74xx ic's.
Also there is still a lot of operational equipment in the field using this old technology.
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