Bob, the power pins are for logic and I/O. There is no separate analog
ground. All pins should be connected.

   - Tom

At 07:28 PM 9/4/97 -0700, Bob Blick wrote:
>Hi,
>
>Does anyone know the difference between the multiple power and ground pins
>on the 16C74? It has two grounds and two power pins, but there isn't
>continuity between pairs. I've always connected all of them and not really
>paid much attention to the specific layout, but I'm curious if one set is
>for the analog portion of the chip and the other set digital, or whatever.
>
>Cheerful regards,
>
>Bob