On Fri, 05 Dec 2008 18:48:53 -0800, Peter Bennett
wrote:

On Fri, 5 Dec 2008 19:33:40 -0500, "gore"
wrote:

I work at an electronics contract manufacturimg facility. We do work for
several companies and I wonder why they use different labels on the
schematics and pcb's to refer to IC's. Some of them have a U1, an A1, and
X1, or an IC1. Why do they do this? Is there a standard used to label IC's
in a schematic? Just curious why this is.

Thanks


The standard reference designator for integrated circuits is "U" -
anything else is wrong! ( IMHO :-) )

It's certainly non-standard. I suppose you could make up your own
letters to represent the elements in a chemistry reaction, on the
theory that things like Sn and Pb are illogical.

But it would be tricky to get that published.

John