SN74LS08N .. Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied. SN74LS08N datasheet, SN74LS08N pdf, SN74LS08N data sheet, datasheet, data sheet, pdf, Motorola, QUAD 2-INPUT AND GATE. SN74LS08N from Texas Instruments High-Performance Analog. Find the PDF Datasheet, Specifications and Distributor Information.

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Make sure power’s on pin 14 and ground is on pin 7. Now with Unlimited Eagle board sizes!

The chip should not heat up. 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.

The datasheet says that it requires a minimum of 4.


Once you see the outputs from the AND gates acting like they should, hook them up to the next stage. You would fare better to use modern CMOS families like 74HC, so sn4ls08n and gates, 74HC14 not gates everyone uses the ’14 because it has schmitt-trigger inputs which are very useful for signal conditioning. Read times previous topic – next topic. CrossRoads on Dec 29, I don’t understand, why OUT green cable still “high” and the LED on even if both inputs yellow cables are off here both are on.


I apparently was trying to use the IC upside-down, sending power to ground, and ground to power. The 74LS05 circuit cannot work as that’s an open-collector chip – the outputs can only sink current, not source it.

I’m not using any of the AND gates.

LarryD on Dec 29, The key to troubleshooting these kind of problems is to break them down to their essentials and add stages only after what you start with datashet working properly. Post as a guest Name.

I hope this quality is good enough. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

SN74LS08N from Texas Instruments

Start creating good wiring habits. Show us a good image of your wiring. MarkT Brattain Member Posts: Sign up using Email and Password. Apologies if I am missing something obvious, I am a first year EE student.

Terminate to High or Low as needed. Disconnect everything but power and ground. Home Questions Tags Users Unanswered.

Dafasheet are lacking decoupling caps on your chips BTW – don’t get into that bad habit, nF ceramic for each chip is a good starting point. Yes, apparently you did next time I’ll zoom out a bit more when looking at a sn74lss08n. The last thing you did is where you should start looking. If it does, try a different chip- the original one may have been fried. See my previous post for output driving currents and suggestion. Look for I OH.


(PDF) SN74LS08N Datasheet download

The 74LS08 circuit issue must be a wiring one. Not the wire colour I am not using any resistors. Check with a DVM to make sure you have things hooked up correctly and that the voltage is correct. Note that I OL is 8mA, which is the recommended sink current. Power it with 5V. I am only powering the IC. Thanks for sn74,s08n advice.

SN74LS08N Datasheet

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 datasehet subject to these policies. Sign up or log in Sign up using Google. Make sure you are identifying pin 1 correctly and counting the pins in the correct direction. Email Required, but never shown.

CMOS is symmetrical and you can drive loads either way.