[PCB_FORUM] Re: cathode pin 1 or 2

Which becomes interesting in the case of radial electrolytics where it's the
cathode that is identified, not the anode (as would be the case with
axials)!
 
Ho hum, so much for rules...
 
Best Regards
 
David Greig
_________________________________________
Director
GigaDyne Ltd
Buchan House
Carnegie Campus
Dunfermline KY11 8PL
United Kingdom
Tel. +44 (0) 1383 62 49 75
_________________________________________

  _____  

From: Ritter, Alan [mailto:Alan.Ritter@xxxxxxxxxx] 
Sent: 25 October 2004 19:55
To: 'icu-pcb-forum@xxxxxxxxxxxxx'
Subject: [PCB_FORUM] Re: cathode pin 1 or 2


Our usual diodes also use pin 1 for the cathode.  (Cadence,
ConceptHDL/Allegro)
 
Basically, our nomenclature is that pin 1 is the "identified" end of a
polarized component.  Since the band on traditional diodes is the cathode
end, that becomes pin 1.
 
Polarized caps have the '+' pin as pin 1.
 
/s/jar (alan.ritter@xxxxxxxxxx)





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