[time-nuts] Subs for obsolete chips in pictic

Chris Albertson albertson.chris at gmail.com
Sun Dec 11 15:04:35 EST 2011

Looking at the picric II schematic.  Trying to decide on the bet
substitute parts for some obsolete parts.

It uses a few 74ACxxx locic family parts that are no longer made.   I
think the "74H" or "74F" series should work  What do you think?  I may
have to adapt an SMD part.     They have to work on 5V supply and the
clock is 10MHz.   There is also a discontinued op amp but they are
easy to sub.


Chris Albertson
Redondo Beach, California

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