Russell,

> A 16LC76 based design: 32 kHz tuning-fork rock, 5 V power supply/
...
> That's an >>>LC<<< 76, mind you, and you can get lower on on other parts.
...

Oh, yeah, I forgot to say: that's with LP oscillator of course,
and with Watchdog ON, but Brownout detect OFF.

Brownout detect is obviously intended for AC fail and not for low
battery, because the BOR itself draws 400 uA!

------------
Barry King, KA1NLH
Engineering Manager
NRG Systems "Measuring the Wind's Energy"
Hinesburg, Vermont, USA
www.nrgsystems.com