|
|
Pin1 Cathode |
Post Reply 
|
| Author | |
ArtGon007 
New User 
Joined: 26 Jul 2022 Status: Offline Points: 2 |
 Post Options
 Thanks(0)
 Quote Reply
 Topic: Pin1 CathodePosted: 26 Jul 2022 at 10:31am |
|
Is there a specification that specifies pin 1 is cathode for diodes? Or is it just industry standard?Diode issues strike again...
|
|
 |
|
|
|
|
Tom H
Admin Group 
Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5716 |
Post Options
Thanks(0)
Quote Reply
Posted: 26 Jul 2022 at 12:49pm |
|
Pin 1 for Cathode was started back in the 1990's with OrCAD Layout (which was taken offline in 2007 after Cadence bought it).
I created the CADPRO library and sold a copy to OrCAD as their default library before Cadence acquisitioned them. All the diodes had pin 1 as the Cathode so OrCAD Capture symbols put pin 1 on the Cathode. It is a DeFacto standard because OrCAD Capture was the number one most used schematic tool for many years. We now use C and A for the pin assignments to avoid mistakes and confusion. |
|
|
|
|
Post Reply
|
|
| Tweet |
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Topic Options