16 Nov
2004
16 Nov
'04
7:04 a.m.
William Maddox wrote:
I thought that 74F series parts were generally
replacements for 74S
parts. Is this incorrect? A more serious concern is that the parts
that have been recently produced seem to be simpler glue logic, bus
transceivers, etc. Many of the nice functional blocks used for building
CPUs were dropped from manufacturers catalogs years ago, and many were
never even offered in the more recent logic families. Take, for
instance, the 74172, an 8x2 dual-ported register file used in the Data
General Nova 2.
You can still GET that at http://www.unicornelectronics.com/ but just what
is stock on hand is all that is left. They have some 74S and 74H too.
Ben.