Memory claims 4000-series CMOS ICs have been around

for about 50 years - Wikipedia thinks so too...

https://en.wikipedia.org/wiki/4000-series_integrated_circuits

Memory also claims the "A" series were pretty fragile;  "B"s

noticeably less so.  74HC came along much later,  IIRC -

Perhaps 35 years ago?

https://en.wikipedia.org/wiki/HCMOS

On 10/20/18, David C Brown <dcb.home@gmail.com> wrote:
> I am building a digital clock with Nixie tube display for a friend and we
> have decided that we will not use any components which were not available
> in 1978 (the year we started work together, me as a hardware designer, he=
r
> as a software engineer)
>
> 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.
>
> Anybody got a really good memory or, even better, old data books?
> __________________________________________
> David C Brown
> 43 Bings Road
> Whaley Bridge
> High Peak                           Phone: 01663 733236
> Derbyshire                eMail: dcb.home@gmail.com
> SK23 7ND          web: www.bings-knowle.co.uk/dcb
> <http://www.jb.man.ac.uk/~dcb>
>
>
>
> *Sent from my etch-a-sketch*
> --
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