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Is there a free web service where I can make that easily? I have made one – just dstasheet that I am a total noob regarding electronics – you’ll probably laugh at my attempt: You should combine them with some sort of logic function eg ‘Or”And’ or similar.

It is not clear under what conditions you want to enable the Micro-Kim expansion port. By clicking “Post Your Answer”, you acknowledge 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. You can use a instead of the Following is the schematic datzsheet TI’s data sheet so you can see what’s going on in there, and what logic function do you want to implement?

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7404 – 7404 Hex Inverter Datasheet

Thanks for mentioning open-collector. If they’re not both high or low at the same time So there won’t be a conflict if one output of the is high and the other is low. Home Questions Tags Users Unanswered. If both outputs are adtasheet 5V wouldn’t they combined still be 5V?


Can you explain to me why it won’t work? Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of servicedatashset policy and cookie policyand that your continued use of the website is subject to these policies. Sounds like what I need.

Post as a guest Name. Sign up or log in Sign up using Google. I’m not doubting your answer – I just don’t understand why: You are right – didn’t think about that combination: The has open-collector outputs.

I will connect two Yx pins to two two separate input pins on the N. I don’t think it’ll fry anything, but since s aren’t open-collector gates, if you connect dattasheet outputs together dtasheet 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 datassheet the signals the latter in this case, because the outputs of the ‘ are active low.

Email Required, but never shown. You are aware that the 74LS’s outputs are active-low aren’t you?

I’m thinking that I can just use a ? The comment was really more for the OP’s benefit to help him work out his logic. Will that fry the N? Thanks so much for the answer. What you are doing with the two outputs is not okay. But I’m too lazy to edit, I’m just dagasheet to consider that last comment as over-completeness: Is it OK for the output pins to be high?


digital logic – N and high output – Electrical Engineering Stack Exchange

I’m a noob here. That is, if one is high and the other is low. Sign up using Email and Password. No that won’t work. Or, better yet, can you complete this truth table?: I had a feeling that this was the case.

Woah – that’s neat! Icy 2, 5 It’s unconventional, but clear what you meant in your question now. datazheet

And thank you for teaching me how to ask questions here: I want to use the N together with a 74LS to do memory address decoding. Since the 74LS has active low outputs, the Y0 and Y7 outputs will never both be low at the same time. 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.

Tut yes, you’re right, forgot the ’06 was inverting.

You should include a truth table. I didn’t know about that concept and will read up on it. Thanks for the correction. Sign up using Facebook.

Will switch to use the ‘ You can’t wire two outputs together like that.