Usually an A indicates a die shrink and general revision (fix minor
bugs, perhaps enhance data retention, etc).

Once in awhile the changes are more substantial (change in programming
sequence)

You can usually find out exactly what changed in the back of the data sheet.

-Adam

Chris Loiacono wrote:

>What's the difference between a 16F628 & 16F628A?
>
>TIA,
>CL
>
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