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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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? Sign up using Email and Password.

However, there is one clear datsheet Search form Search this site.

IC Datasheet: 74LS20 : Free Download, Borrow, and Streaming : Internet Archive

Hopefully the OP can explain why they did this. Product Group Product Description. 74ps20 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.

Sign up or log in Sign up using Google. I’ve tried to pair the inputs together as I want it to function as a dual input gate. Peter – Absolutely agreed.


74LS20 datasheet, 74LS20 datasheets, manuals for 74LS20 electornic semiconductor part

If you have any amazing things you want to discuss with Tinkbox, don’t hesitate to contact us:. Our office is open: FYI connecting anything to an “NC” pin is risky. Some functions may be missing or not functioning. Contact Infomation If you have any amazing things you want to discuss with Dxtasheet, don’t hesitate to contact us: The administrators are still migrating contents to our new home.

Have I wired this wrong? You can also call us at or send us a message through our Facebook page. As already commented by John Da real schematic would definitely help readers. I’ve tried the same circuit with a couple of IC’s in case one was faulty, but the same behavior is exhibited.

For all your product inquiries, send us a message on our Contact Page with the Product Inquiry subject. This device contains two independent gates each of which performs the logic NAND function. Order Information Free shipping. Therefore if you see a 74sl20 labelled “NC”, the least risky option is not to connect anything to it.


How to Make Learning More Fun? I have this circuit: Your LED will be drawing more than 0.


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?

Uno R3 Dattasheet Comp 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.

Powered by Rethink Tech Inc. You can place your order any day and time. 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.

I wonder if there is a rogue datasheet somewhere which has mixed that unusual “W” package pinout, with the “N” package pinout?

Arduino basics with Tinker Danica. I’m using a quad input due to lack of components. Other Services Custom Projects. However it seems that you have connected IC pin 11 to Gnd. Datashee Questions Tags Users Unanswered.