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I don’t think it’ll fry anything, but since s aren’t open-collector gates, if you connect two outputs together and they’re not both high or low at the same time, the output logic level will be undefined and can’t be guaranteed to be either a 1 or a zero. Tying the two outputs together in this fashion is called a ” wired-or ” or ” wired-and ” depending on the polarity of the signals the latter in this case, because the outputs of the ‘ are active low.
N, BG-ELECTRONICS NA,N, , Hex Inverter, Hex, Inverter
It’s unconventional, but clear what you meant in your question now. I didn’t know about that concept and will read up on it. Icy 2, 5 I had a feeling that this was the case. I’m a noob here.
N Datasheet, PDF – Alldatasheet
And thank you for teaching me how to ask questions here: Basically if one of them wants to be high and datasjeet other wants to be low, they will compete and force limiting currents through each other, very likely damaging them, because you cannot guarantee in any case that they will go high or low at the same time, since then you’d have to tie both inputs together as well. Thanks for the correction. Sounds like what I need. It is not clear under what conditions you want to enable the Micro-Kim expansion port.
No that won’t work. Sign up using Email and Datqsheet.
7404 – 7404 Hex Inverter Datasheet
You can’t wire two outputs together like that. Woah – that’s neat! That is, if one is high and the other is low. Thanks so much for the answer. If they’re not both high or low at the same time You should combine them with some sort of dayasheet function eg ‘Or”And’ or similar.
You are aware that the 74LS’s outputs are active-low aren’t you? Is there a free web service where I can make that easily? Sign up using Facebook. I want to use the N together with a 74LS to do memory address decoding. Thanks for mentioning open-collector. The has open-collector outputs. Post as a guest Name.
But I’m too lazy to edit, I’m catasheet going to consider that last comment as over-completeness: So there won’t be a conflict if one output of the is high and the other is low. Home Questions Tags Users Unanswered. Is it OK for the output pins to be high?
You can use a instead of the I’m not doubting your answer – I just don’t understand why: Sign up or log in Sign up using Google. Will switch to use the ‘ I’m thinking datazheet I can just use a ?
Following is the schematic from TI’s data sheet so you can see what’s going on in there, and what logic function do you want to implement?