E
eromlignod
- Jan 1, 1970
- 0
Hi guys:
Here's just a simple, silly question from a non-EE that probably has a
simple answer.
If I have several TTL logic outputs that I want to "OR" together, so
that any of these will drive the output of the OR gate, why can't I
just connect the output wires together physically, merging them into
one wire, without using the gate?
One reason I can think of is that it avoids the case where two
connected wires are high at the same time. But if I ensure that this
cannot happen due to my upstream design (like a decoder), do I still
have to use the OR, or can I merge the outputs?
Don
Here's just a simple, silly question from a non-EE that probably has a
simple answer.
If I have several TTL logic outputs that I want to "OR" together, so
that any of these will drive the output of the OR gate, why can't I
just connect the output wires together physically, merging them into
one wire, without using the gate?
One reason I can think of is that it avoids the case where two
connected wires are high at the same time. But if I ensure that this
cannot happen due to my upstream design (like a decoder), do I still
have to use the OR, or can I merge the outputs?
Don