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Old 12th Jan 2017, 12:55 am   #15
Argus25
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Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,679
Default Re: 2N3819 Mosfet

I think with the pin number assignments for transistors & fets they are merely to reference the pin numbered in the individual diagram to a list on the same diagram and have no other meaning? Possibly this was due to the wide range of transistor packages. So the actual pin numbering could be quite different depending on the particular data sheet & manufacturer.

In the case of IC's though it was more regular with say the top view being standard, the notch on the IC on the left hand side and pin 1 always being the lower left terminal on the diagram and often a dot/indent near pin 1 on the package.
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