Whence the CMOS 4004 / was Re: Bought a 4GB USB stick today, and guess what...

[Brent Hilpert]

Tony Duell wrote:
> 
> > >> >And of course a 4040 from Intel is a 4-bit microprocessor, from RCA it's
> > >> >a 12 bit CMOS counter. I can never rememebr what the 4004 is in the
> > >> >4000-eries CMOS, it's sufficiently rare that none of the data books I
> > >> >have to hand list it.
> > >>
> > >>
> > >> ur kiddin.  Just prefix 74{c, hc, hct} and the 4xxx number and you
> > >> get it's function and pinout.
> > >
> > >None of my data books list a 74HC4004 either. Does it even exist?
> >
> > I have data but in 1973 it was already replaced by 4024 a 7 stage
> > binary counter.
> 
> YEs, the 4004 exited, but I susepct the 74HC(T)4004 never did. So trying
> to look it up doesn't help...

FWIW, the 1972 RCA COS/MOS databook, which is pretty early for the 4000 CMOS
series, does not present data pages for a 4004 (nor a 4003 or 4005), nor are
they listed in the numerical index.

However, there is an application note "COS/MOS MSI Counter and Register Design
and Applications" (no date) which discusses the 4004 (CD4004A) "7-stage
ripple-carry binary counter" extensively.