Comment to myself... Took a second look and found at least some 54-series logic under the heading "Military/Aerospace"... Jan-Erik. Jan-Erik wrote: Talking about National, I just checked there site, and was a bit surprised to find a total of 1944 different prod numbers in there product tree. And no 74- or 4xxx- series logic. Wasn't National a "big player" once ? http://www.national.com/catalog/ Jan-Erik. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu