Compactrons (at least none that I know of) are not
integrated - each
function is pinned out individually. Something like the 6N6G is true
integration - one triode feeds another (they can not be used
individually).
Well, is a transistor array -- something like a CA3046 -- an integrated
circuit? That's 5 transistors, essentially pinned out separately (IIRC, 2
of them have the emitters commoned). It's always listed as an IC in parts
lists, data books, etc, but I guess you don't consider it to be one (if
it is, then why is the ECC83 / 12AX7 not?)
-tony