[sdiy] CMOS & CD4007 Questions?

[Scott Gravenhorst]

FWIW, I can relate a 4069 experience.  I was building a René Schmitz VCO that
uses all 6 inverters.  I put the schematic together and had a strange
problem.  Turns out that René had used different inverters than I had for the
different functions of the circuit.  When I repinned mine, it worked
properly.  René was also able to duplicate my problem by repinning his.  6
inverters.  I'm not sure if the chips we used were of the same maker, I
believe not.  At least for us, the inverters within that same chip did not
behave identically.  Ever since then, I've started to note pin numbers on my
schematics, at least for CMOS.

"Jay Schwichtenberg" <jays at aracnet.com> wrote:
>I have some questions about some of the CMOS chips and the CD4007 that we
>use. A number of the 'logic' chips we use in oscillators (inverters), cmos
>in the analog domain and as switchs/muxs (4016, 4066, 4051) have a number of
>little quirks that vary between manufactures. I read and hear: only use so
>and so's chip here, don't use XXXX's chip, have to select chips......
>
>Then there is the CD4007 which falls between the analog and digital realm,
>more than most the other chips. A number of manufactures spec it and
>application notes use it in the analog domain. So my main question is how
>consistant is the CD4007? Are there issues with different manufactures chips
>working different?
>
>Thanks for the info.
>Jay
>
>

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