I am trying to do some design where I need to tie several outputs together, using wired-or technology
I am using ECL hence Open Emiter, and by default all inputs is pulled down to low with resistors.
Now it seems that all output symbols only can have two states High or Low, is it possible to create an output that can have High and High-Z instead.
Wired OR
Re: Wired OR
Hi,
Of course, it’s possible. There are two tristate elements available for you they are between Not and And elements.
Of course, it’s possible. There are two tristate elements available for you they are between Not and And elements.
Re: Wired OR
Well, Tristate is not what I am, looking for, since they require an extra control-signal.
Re: Wired OR
Is it what you are looking for?
The dash in the probe means high impedance.
Please look at the circuit attachedThe dash in the probe means high impedance.
- Attachments
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- High-HighZ.CircuitProject
- (3.22 KiB) Downloaded 492 times
Re: Wired OR
Ok, that might be usable, what happens to the inputs when the connected outputs is HiZ, are they pulled low by default.
Re: Wired OR
It the same as just disconnect the input. For And it treated as 1 for Or as 0.
Re: Wired OR
Ok, so in the ORgate the input is pulled low.