> What he did do, however, was to challenge me to find
> _anywhere_ in the data book that said the JW was
> spec'ed to 125.  He said that you have to go to an
> E-suffix part for that.

  Ahhh, now this is an interesting question...

  Take a datasheet at random.  Say PIC16C71x.  And
  look at section 11.0 'Absolute Maximum Ratings'.

  Note the first line:

  "Ambient termperature under bias .... -55 to +125C"

  This section does _not_ distinguish between
  different versions of the chips; neither oscillator
  type nor package type.  Therefore, any 16C71x is
  "spec'd" to operate up to +125C, including a JW
  packaged chip.

  The following sections then give extensive DC and
  AC characteristics.  These sections _do_ distinguish
  between different versions of the chip; specifically
  between commercial, industrial, and extended temp-
  erature ranges.  Therefore, the characteristics of
  a JW packaged chip at +125C are only "spec'd" if
  that JW packaged chip is an extended temperature
  type.

  So (for example):

  1.  A 16C710/JW is spec'd to operate at +125C.
  2.  A 16C710E/JW is spec'd to have certain DC
      and AC characteristics at +125C.

  So I believe the answer to your Microchip FAE is
  that the datasheet DOES spec a JW packaged part
  to operate at +125C (but with undefined charac-
  teristics unless it is ALSO an extended temp-
  erature version).

___Bob