[PCB_FORUM] Re: same symbol - different number of pins

thanks, but I was just wondering how to avoid this.
Just to warn schematic designers that by choosing LM1117 they can have 
different types.
 
(we have a lot of them taking the first thing that "looks like" what they want.
Then we have to change later for what they purchased....)
 
If there is no other way I will do it as you suggest.
 
    William.
 
 
 
________________________________

From: icu-pcb-forum-bounce@xxxxxxxxxxxxx 
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Ed Caldwell
Sent: 11 October, 2006 1:59 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: same symbol - different number of pins



Make a different schematic symbol for each (part number) with appropriate pin 
counts. 



"William Billereau" <William.Billereau@xxxxxxx> 
Sent by: icu-pcb-forum-bounce@xxxxxxxxxxxxx 

10/11/2006 07:48 AM 
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[PCB_FORUM] same symbol - different number of pins

        




Hello All. 
  
Is there a solution for such component in ConceptHDL: 
LM1117 from National: 
  
DTX type = TO252 3 pins 
MPX type = SOT223 4 pins . the fourth is the tab that has to be connected to 
OUT pin 2. 
  
How to do it to: 
-have only one symbol body 
(I think without any "tab" pin. I tried with 2 versions on with the TAB the 
other without. But Add Part only take version 1 by default.) 
  
-Connect this TAB automatically to pin 2 OUT 
(I tried to add in the parttable to MPX type a PACK_SHORT='(2,4)' but 
unsuccessfully.) 
  
- Select anyone of both different type in a single parttable.. 
  
Thanks in advance. 
  
  
PS. This case seems to be a common problem. By searching "regulator tab" in 
sourcelink, it returns a case for a MC7805CT2 (or 3). 
http://sourcelink.cadence.com/docs/db/kdb/1998/July/1816165.html 
<http://sourcelink.cadence.com/docs/db/kdb/1998/July/1816165.html>  
but the test2_archive.zip contains only a body with the tab, but selecting a 
new one shows a 3 pin JEDEC and the import logic returns a "incorrect pin 
number". 
So this test2 does not work. 
They speak about a multipin.tar available on ftp.cadence.com 
<ftp://ftp.cadence.com/>  but this FTP site is unaccessible. 
Does anybody get it somewhere? 
  
  
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