kicad-developers team mailing list archive

[Chris Pavlina <pavlina.chris@xxxxxxxxx>]

Thank you for saying this - op amps are the perfect example of why 
relying on standard pinouts is a *terrible* idea!

Let's look at a few eight-pin DIP/SOIC/TSSOP dual op amps, shall we?

TL072?      out in- in+ v- in+ in- out v+
LM358?      out in- in+ v- in+ in- out v+
MC33078?    out in- in+ v- in+ in- out v+
NE5532?     out in- in+ v- in+ in- out v+
MCP6002?    out in- in+ v- in+ in- out v+
AD8552?     out in- in+ v- in+ in- out v+
LF353?      out in- in+ v- in+ in- out v+
LT1013*N?   out in- in+ v- in+ in- out v+
LT1013*S?   in+ v- in+ in- out v+ out in-

See the problem?

On Fri, Jun 05, 2015 at 08:46:26PM +0200, Lorenzo Marcantonio wrote:
> On Fri, Jun 05, 2015 at 11:08:19AM -0700, Andy Peters wrote:
> > I realize that there’s an argument that goes, “Well, the library will be super big if we want to support all of the possible transistors out there.” And that argument is silly. Does anyone use a generic op-amp symbol instead of placing a TL072ACD (there it is again, symbol name calling out footprint!) on the schematic? No, of course not. So why is that OK for transistors? 
> 
> I do that actually before chosing the op amp:D industry standard pinouts
> are useful, and the dual amp is the perfect example!
> 
> -- 
> Lorenzo Marcantonio
> Logos Srl
> 
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