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74LS20 DATASHEET PDF

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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Pin 11 is a no-connect on the normal DIP package, so grounding that pin has no effect. Therefore if you see a pin labelled “NC”, the least risky option is not to connect anything to it. Post as a guest Name.

I just couldn’t think of another reason why there is a Gnd connection on pin 11 – that was the only hypothesis I could think of. Contact Datahseet If you have any amazing things you want to discuss with Tinkbox, don’t hesitate to contact us: 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.

Skip to main content. Search form Search this site. However, there is one clear bug: This device contains two independent gates each of which performs the logic NAND function. 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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Sign up or log 74lls20 Sign up using Google. Product Group Product Description. This won’t be doing the IC any good, although I hope that permanent damage won’t happen.

There is no connection from IC pin 7 to Gnd 0V. Have I wired this wrong? Our office is open: Tinkbox is currently in beta mode. The fact that at least some datasheets like the TI one show both 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? It is interesting that pin 11 is connected to Gnd on the OP’s breadboard, for dxtasheet reason I explain in my answer.

Order Information Free shipping. That would be correct for an unusual package military temperature version of in a ceramic flat-pack but is not correct for a standard 74LS20 in “N” package plastic DIP like yours. I wonder if you have misinterpreted whatever Vatasheet datasheet you have been looking at, if it contains that unusual pinout, with Gnd on pin 11?

Datasheeet tried to pair the inputs together as I want it to function as a dual input gate. Whereas in a “W” ceramic flat-pack package, the uses pin 11 as Gnd: I have this circuit: The administrators are still migrating contents to our new home.

Peter – Absolutely agreed. Powered by Rethink Tech Inc. Some functions may be missing or not functioning. If you have any amazing things you want to discuss with Tinkbox, don’t hesitate to contact us:.

Full text of “IC Datasheet: 74LS20”

How to Make Learning More Fun? As already commented by John Da real schematic would definitely help readers. I’m using a quad input due to lack of components. Popular Products Tinkduino Leo. You can place your order any day and time. Mega R3 Arduin Hopefully the OP can explain why they did this. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Dataeheet.

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FYI connecting anything to an “NC” pin is risky. You can also call us at or send us a message through our Facebook page. PeterBennett – Yes, agreed. I’ve tried the same circuit with a couple of IC’s in case one was faulty, but the same behavior is exhibited. Please add that and re-test. For all your product inquiries, ratasheet us a message datashete our Contact Page with the Product Inquiry subject. Home Questions Tags Users Unanswered.

74LS20 Datasheet

Email Required, but never shown. Arduino Pro Mini Create new account Request new password. However it seems that you have connected IC pin 11 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? A couple more points: 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.