[sdiy] So what's the difference between these IC's?

[Scott Stites]

Hi list,

I've been sorting through my warehouse of goodies, and, as usual, the same
questions pop up about why there are two different CMOS chips that perform
the same function.  So, I thought I'd drop everything and bug the list. =0)

Specifically:

CD4030 versus CD4070 - both are quad 2 input XOR gates

And the same applies to the CD4016 versus the CD4066 they're both quad
bilateral switches.  So - what's the difference, if any?

Hopefully somebody can answer this nagging question I've never gotten around
to asking until now....

Cheers,
Scott