Better use 74HC or 74HCT parts, the 74F should be TTL FAST parts that require high input current to be driven correctly.
On Sun, Dec 11, 2011 at 9:04 PM, Chris Albertson <[email protected]>wrote: > 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 > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
