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74LS10 3-input NAND gate not working!

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eagle1109

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I was working on my project with logic, sequential and combinational ICs.

And, wanted to test the 74LS10 3-input NAND gate and it wasn't working!!

All other ICs are working, NOR, 2-input NAND, counter, 555 timer.

I've other 74LS10, if they all not working then I'd combine 2-input NAND and one AND gates to get 3-input NAND gate.

I just want to know why it's not working?
 

Wrong pin mapping?

It should run on default, and provide 5V on every output pin.

As the 2-input NAND gate, it have 5V default on output pins.

And the inverter is the same principle.
 

HI,

* schematic?
* input signals?
* output signals?

Klaus
 

Try with another IC? Perhaps this one has gone bad?
 

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