I looked at the 74HC and 74HCT variants on the Phillips www site. They
make some similar chips with slightly varying part numbers, but I
checked them all.

These chips are intended to run as high as 19 Mhz, and they all draw
way to much quiescent power too. There might be a chance of one
working if there was a slower speed part, but I don't see anything
like that. I'm not sure why they draw so much current when they aren't
switching, but they do.

Thanks,

A


You could make a VCO with an op-amp and a comparator, but how about
the VCO portion of a 4046?



Best regards,
Spehro Pefhany