/diy/ - Do It Yourself

>>2036834
>Then why not use dedicated logic chips instead
CPUs were still being built out of discrete transistors when the CD4000 series came to market. the need filled by this particular chip was a semi-committed transistor array, out of which more complex CMOS logic and signal processing functions could be built semi-discretely, without incurring the speed penalties of unnecessary transistors or multiple stages of gates, right side of pic related. compare the CD4007's connections to a schematic of a CMOS gate and you should see a correspondence right away
you younguns and your demands that everything be cooked to order, baka
>They surely had them back in the Apollo days
>Apollo
>made entirely of 3-input NOR gates
conveniently...
I could imagine the semi-discrete version might have had better properties than a fully monolithic logic gate wrt transient abuse and cosmic ray upsets, but I am just speculating

>>2036915
convenience is in the eye of the beholder. it's also situational

>>2036849
those look pretty old, to put it nicely