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Symbols Configuration for PCB Libraries Answered

Hi everyone !, I would like to know what kind of symbol configuration most of engineers or pcb designers use or what standards follow to create the symbols.

I found some recommendations and i have two examples of symbol configurations , In the "Image #1" i created the symbol placing inputs and pasive pins on left side and outputs on the right side and in the "Image #2" i followed the symbol configuration of the typical application of the datasheet.

Which of the two configurations is preferred or recommended to use and why?

Thank you.

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seandogue

2 months ago

There are those who are required to use IEEE spec symbols, others who have to use other standards. In general though, unless a company (or school) one works for / attends requires the use a specific set of libraries, it's "use what works." (as long as it's accurate and uses the proper terminations for connecting to other elements.)

I've created many schematic symbols with inputs left, output right, (and visa versa actually, even though yes, you can often rotate 180 deg...not the same), and some with a mix. Personally, when I create a schematic, if it's not a large circuit, I prefer that there are a minimum of crossed lines (easier readability), so that consideration may apply to this or that schematic symbol used.

This generally is for elements in which there isn't already a stock symbol. If there IS a stock symbol I usually use it unless it's use would result in a real mess.

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randofo

2 months ago

I don't know best practices.

My best guess is the layout in the datasheet was chosen for clarity and compactness to minimize overlapping traces (when drawing the circuit). Since the symbol is largely used as a guide for building the circuit and doesn't necessarily have an impact upon manufacturing the PCB, I am not sure that it matters.