>A quick look at the data sheet for this chip and it
>looks like the usual sort of good PIC resources are
>available.  What is special about this particular PIC?

Its price is about half that of the nearest 8 pin pic, and because it comes
in a 6 pin SOT-23 package it can take up minimal room (at a guess something
like a third to half that of an SO-8). For the price it is possible to have
an item with higher functionality than a 555, in a smaller space, and for a
lesser price.

OK it does have the 12 bit core limitations of the 12C509 series, but
shucks, you cannot have everything - this just pretty close.

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