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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Search Results for 74LS20 : 2 documents found

The administrators are still migrating contents to our new home. I’ve tried the same circuit with a couple of IC’s in case one was faulty, but the same behavior is exhibited. Post as a guest Name. I wonder if there is a rogue datasheet somewhere which has mixed that datasehet “W” package pinout, with the “N” package pinout?

That would dstasheet correct for an unusual package military temperature version of in a ceramic flat-pack but is not correct for ddatasheet standard 74LS20 in “N” package plastic DIP like yours. This won’t be doing the IC any good, although I hope that permanent damage won’t happen. For all your product inquiries, send us a message on our Contact Page with the Product Inquiry subject.


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Pin 11 is a no-connect on the normal DIP package, so grounding that pin has no effect. Product Group Product Description. Post Your Answer Discard 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.

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I’m using a quad input due to lack of components. You can also call us at or send us a message through our Facebook page.

PeterBennett – Yes, agreed.

74LS20 Dual 4-input NAND Gate

If you’re having trouble, please go to Support or click on the Feedback button found at the bottom. Our office is open: Peter – Absolutely agreed. Skip to main content. 74ls220, there is vatasheet clear bug: The problem I see is not so much that pin 11 is connected to Gnd; but that pin 7 is not connected to Gnd. Engineered in the Philippines. Powered by Rethink Tech Inc. Order Information Free shipping. I wonder if you have misinterpreted whatever IC datasheet you have been looking at, if it contains that unusual pinout, with Gnd on pin 11?


74LS20 Datasheet PDF / TI –

This device contains two independent gates each of which performs the logic NAND function. Hopefully the OP can explain why they did this. Mega R3 Arduin As already commented by John Da real schematic would definitely help readers. Home Questions Tags Users Unanswered. Sign up using Facebook.

Search form Search this site. Tinkbox is currently in beta mode. A real schematic rather than a photo of your datasheft might help you get an answer to your question. Whereas in a “W” ceramic flat-pack package, the uses pin 11 as Gnd: FYI connecting anything to an “NC” pin is risky.