🚀 go-pugleaf

     If your input signals are low frequency I have just the
thing.  AMD (Advanced Micro Devices) has the ZPal, Z for zero
power.  When none of the inputs swich for a period of time,
usualy around 50ns, the device goes into its power down mode.
It will remain in this mode until an input transition occures.
While in this mode the outputs are held at the same state as
before the power down.

     While in standby mode the current is <15ua.  As the input
frequency increases so does the current.  The supply voltage can
range from 3.84V to 7V.

          Input freq.(Hz)          Icc(ma)
          ---------------          -------
               1K                  0.09
               10K                 0.3
               100K                1.3
               1M                  15
               10M                 50
                .                   .
                .                   .
                .                   .


                                                Bill o'Donnell
                                                (concerned citizen)