David C Brown wrote:

> My problem is that i cannot remember what CMOS chips were available 40
> years ago.  I am fairly sure that the CD4000 series was established by th=
en
> but cannot remember if the Texax HC74 series had been released.
>=20
> Anybody got a really good memory or, even better, old data books?

Texas TTL databook (Second European Edition) 1977 only list 74, 74L and=20
74LS.  In the 1980 (fourth edition) supplement I can see some 74H and=20
74S but no HC.

George Smith
--=20
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