We use PICs running on 3.7V lithium cells at 32KHz for long battery life.
Typically our circuits operate between 12 and 18uA. We have used a number of
processors 16LC58A, 16LC558, 923, 924 etc. Always LC versions for 32KHz and
Industrial temperature range.

The 58A and the 558 are products which Microchip are superseding with newer
parts: 58B, 622A (like a 558 but with comparators thrown in). However our
experience on Microchip's latest die shrinks is that the power consumption
at 32KHz has gone through the roof - typically x2 or x3.

Has anyone else come across this problem?
Has anyone got any ideas?

James Wilson