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DaveC[_4_] DaveC[_4_] is offline
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Default Schematics nomenclature

http://imgur.com/KWFIN1H

Pins 12 and 13 have a little triangle next to the pin; pins 1, 2, 15, 16 have
what looks like an n; 3 and 14 have an x.

Whats the meaning of these marks?

Thanks.