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Re: Schematics nomenclature

Cross-posted to 5 groups.

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On 7/4/2016 8:26 AM, DaveC wrote:
> 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”.
>
> What’s the meaning of these marks?

The little triangle (sort of like half an arrowhead?) denotes active low
(what used to be indicated by a "bubble").  The tip of the arrow indicates
the direction of signal flow.  Can appear on a gazinta or a cumzouta.

A (real!) triangle inside the device outline denotes a dynamic/clock input
(edge)

The "n" (actually, more like an upside down U) denotes an analog signal
(look at the device and you can see why this is so!) when encountered on
a digital signal; a '#' indicates a digital signal when encountered on
an analog signal.

The 'x' indicates a "non-logic" signal (in yor case, the reference gnd)

There are other markings that indicate postponed outputs, tristate outputs,
open-collector, open-emitter, hysteresis, etc.

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Schematics nomenclature DaveC <not@home.cow> - 2016-07-04 08:26 -0700
  Re: Schematics nomenclature "Tom Del Rosso" <fizzbintuesday@that-google-mail-domain.com> - 2016-07-04 12:49 -0400
    Re: Schematics nomenclature N_Cook <diverse@tcp.co.uk> - 2016-07-04 18:49 +0100
  Re: Schematics nomenclature Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2016-07-04 21:11 +0300
  Re: Schematics nomenclature Don Y <blockedofcourse@foo.invalid> - 2016-07-04 11:22 -0700
    Re: Schematics nomenclature DaveC <not@home.cow> - 2016-07-04 12:45 -0700

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