RTL Logic

[Dwight K. Elvey]

Hi
 Both right but it really depends on usage.
Dwight


>From: "der Mouse" <mouse at rodents.montreal.qc.ca>
>
>>>> Wired-OR will work fine for open-collector output TTL.
>>> Well, except you generally get wired-AND, because the open
>>> collectors are generally NPN collectors with emitters to ground, not
>>> PNP collectors with emitters to Vcc.
>> That is twice you've tried to make this point.  If a signal is viewed
>> as active low, then what is going on is logically wired-or.
>
>Yes...but would you call (¼ of) a 7408 an OR gate if it happens to be
>manipulating such signals?  That's the sense in which I say it's
>wired-AND: the resulting signal is what you'd get from feeding the same
>logic levels (except with pullups, or non-OC outputs) into the gate
>usually called an AND gate.
>
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