First we were using the square pad as the reference of the cathode of axial
diode because the painted bar (identification) was on the cathode. And by
the same way this is why we are using the square pad to identify the cathode
of an LED.
GF

> -----Original Message-----
> From: Jean-Francois Bissonnette [SMTP:[log in to unmask]]
> Sent: Thursday, September 14, 2000 3:19 PM
> To:   [log in to unmask]
> Subject:      [TN] LED orientation on layout.
>
> Hi All,
>
> Is there a conventional way for identifying LEDs' anode on a layout?
> When we design our layout, we always put the anode (+) on pin 1 of the
> footprint, the square pad.  I've just been told that some other company
> are
> putting the anode on the pin 2 the round pad.  I can't tell if they did
> it by mistake or because they use this as a standard but I always assumed
> that the anode was on the square pad (if not identified by a "+" on the
> layout).
>
> Thank you in advance!
>
> JF
>
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