Note The ”Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaran- teed The device should not be operated at. 74LS20 datasheet, 74LS20 pdf, 74LS20 data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Dual 4-Input NAND Gate. 74LS Absolute Maximum Ratings(Note 1). Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be.
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You can also call us at or send us a message through our Facebook page. I’ve tried to pair the inputs together as I want it to function as a 74ls02 input gate.
Contact 74la20 If you have any amazing things you want to discuss with Tinkbox, don’t hesitate to contact us: Product Group Product Description. Therefore if you see a pin labelled “NC”, the least risky option is not to connect anything to it. For all your product inquiries, send us a message on our Contact Page with the Product Inquiry datasheeet. Popular Products Tinkduino Leo. When I throw the switches to the up position, as pictured, the circuit is shorted to ground, which should pull the input pins low, meaning the output pin is high and the LED lights.
Full text of “IC Datasheet: 74LS20”
This won’t be doing the IC any good, although I hope that permanent damage won’t happen. The fact that at least some datasheets like the TI one show 74lls20 pinouts, could perhaps allow someone to look at the wrong pinout when switching between looking at the datasheet, and looking at the breadboard, while wiring the breadboard? I’ve tried the same circuit with a couple of IC’s in case one dagasheet faulty, but the same behavior is exhibited. PeterBennett – Yes, agreed.
Our office is open: It’s been a very long time since I’ve messed around with this stuff so maybe I’ve forgotten something fundamentally intuitive about electronics, apologies if that is the case.
FYI connecting anything to an “NC” pin is risky. Tinkbox is currently in beta mode. How to Make Learning More Fun? It is interesting that pin 11 is connected to Gnd on the OP’s breadboard, for the reason I explain in my answer. Whereas in a “W” ceramic flat-pack package, the uses pin 11 as Gnd: Powered by Rethink Tech Inc.
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The problem I see is not so much that pin 11 is connected to Gnd; but 74lx20 pin 7 is not connected to Gnd. Other Services Custom Projects. I wonder if there is a rogue datasheet somewhere which has mixed that unusual “W” package pinout, with the “N” package pinout? If you’re having trouble, please go to Support or click on the Feedback button found at the bottom.
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A real schematic rather than a photo of your breadboard might help you get an answer to your question. Arduino Pro Mini Create new account Request new password.
Pin 11 is a no-connect on the normal DIP package, so grounding that pin has no effect. The administrators are still migrating contents dtasheet our new home.
74LS20 Datasheet – NAND Gates –
A couple more points: However, there is one clear bug: Uno R3 Arduino Comp Order Information Free shipping. Please add that and re-test.
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