Chip operating temperatures

[Jeff Benagh]

To paraphrase Stephen Dubovsky's comment:

>   In a nutshell:  If you derate the comercial parts they often work well
> outside their spec temp range.  

The chips (usually) are physically the same.  If there is are several
sets of parameters in the databook (comm, ind/auto, military) you can
usually just use the other set of numbers.

The commercial parts were not sample tested in the other temp range
though.  And the packaging might be slightly different.  It's often
quite a challenge to effectively remove heat from parts, especially
when the ambient is 50C or so.  In general, the cooler you run them
the longer they will last, which isn't usually a factor for hobbyist
types.

Jeff