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So there won’t be a conflict if one output of the is high and the other datasheer low. You can use a instead of the Sounds like what I need. If they’re not both high or low at the same time By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Will switch to use the ‘ Woah – that’s neat! If both outputs are 1 5V wouldn’t they combined still be 5V? Is there a free web service 704n I can make that easily? Sign up using Email and Password. Home Questions Tags Users Unanswered.

7404 – 7404 Hex Inverter Datasheet

Can you explain to me why it won’t work? You are aware that the 74LS’s outputs are active-low aren’t you? I will connect two Yx pins to two two separate input pins on the N. You can’t wire two outputs together like that. Email Required, but never shown. Thanks for the correction. Tut yes, you’re right, forgot the ’06 was inverting.

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What you are doing with the two outputs is not okay. It’s unconventional, but clear what you meant in your question now. The has open-collector outputs. You should combine them with some sort of logic function eg ‘Or”And’ or similar.

No that won’t work. I had a feeling that this was the case. Post Your Answer Discard By clicking “Post Your Answer”, you datasneet that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Post as a guest Name.

N. Datasheet, PDF – Alldatasheet

I’m not doubting your answer – I just don’t understand why: The comment was really more for the OP’s benefit to help him work out his logic. I’m a noob here. Thanks so much for the answer. Since the 74LS has 740n4 low outputs, the Y0 and Y7 outputs will never both be low at the same time. It is not clear under what conditions you want to enable the Micro-Kim expansion port. Thanks for mentioning open-collector. I didn’t know about that concept and will read up on it. You are right – didn’t think about that combination: I’m thinking that I can just use a ?

Is it OK for the output pins to be high?

Tying the two outputs together in this fashion is called a ” wired-or ” or ” datasueet ” depending on the polarity of the signals the latter in this case, because the outputs of the ‘ are active low.

Will that fry the N? Or, better yet, can you complete this truth table?: That is, if one is high and the other is low.

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N Datasheet, PDF – Alldatasheet

You should include a truth table. Sign up or log in Sign up using Google. Sign up using Facebook. I have made one – just know that I am a total noob regarding electronics – you’ll probably laugh dafasheet my attempt: I want to use the N together with a 74LS to do memory address decoding. And thank you for teaching me how to ask questions here: 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?

Icy 2, 5 But I’m too lazy to edit, I’m just going to consider that last comment as over-completeness: Basically if one of them wants to be high and the 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.

I don’t think it’ll fry anything, but since s aren’t open-collector gates, if you connect 7404b 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.