>
> Production volume?

10k-100k/yr

> Allowable cost range ? (Stipulate fuzzy constraints as necessary where
> information is lacking)

Very fuzzy, if it fails early because it's too cold or hot outside, or
because of stress cracking or whatever, than whatever the price is,
it's too cheap.  We spec a 10 year operational life.

> How often must / might it be "activated"?

Any time the AC power fails.

> Storage time?

>=3D 600mS

> I'm wondering if any sort of electromechanical store might work?

Hard to imagine that, I'm also space constrained.

> Vague as necessary limits on allowable cost and frequency of use are liab=
le
> to be useful as there may be an acceptably low cost battery solution
> depending on these constraints. .
> What is the minimum holdup voltage that you can tolerate?

VCC is 3.3V and the regulator needs a little headroom, so I'd say 3.6
would be a practial minimum. I might be able to push that, but the reg
also need to tolerate at least 16V on the input, also under full
temperature and voltage range.


Thanks
--=20
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