John Payson wrote:

> Many 4066 variants are rated for over 5 volts, and indeed they
> are quite commonly used for general-purpose switching of signals
> up to about 12 volts.

  Of course the "original" 4066 was rated for 15 or 18V.  I was
referring to the "HC" variants which I had hitherto assumed used the
standard "HC" voltage range of 2 to 6V.  Even the 74HC4024 (Reference:
http://www.st.com/stonline/books/pdf/docs/1963.pdf ) has this voltage
range.  SGS-Thompson at least has made the (54)74HC4066 an exception.
--
  Cheers,
        Paul B.