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March 2007

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Subject:
From:
Pat Johnson <[log in to unmask]>
Reply To:
(Designers Council Forum)
Date:
Tue, 20 Mar 2007 07:12:59 EDT
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Hi. My two cents worth:  I always use pin 1 as ANODE and 2 as Cathode. If the 
schematic symbol is made this way and is placed in the proper electrical 
direction that the circuit requires, then the footprint (following the same 
convention) with have the cathode's polarizing mark in the correct position.
(My thinking here is plus to minus vs the military thinking of minus to plus)
 
The parts that throw me for loop are the to-92 transistors. EBC or CBE .. 
I've been bitten a few times on this one because of the different manufacturer's 
pinouts (and also watch for the sneaky datasheet that shows the "solder side" 
instead of the view from top.
 
Pat Johnson
Compu-Tier



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