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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Show us a good image of your wiring. I dn74ls08n was trying to use the IC upside-down, sending power to ground, and ground to power. The 74LS08 circuit issue must be a wiring one. 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.
MarkT Brattain Member Posts: I’ve got some logic gates from Texas Instruments and would like to understand why the left circuit doesn’t work while the right one works well and. I’m not using any of the AND sn74ls088n. The 74LS05 circuit cannot work as that’s datasheft open-collector chip – the outputs can only sink current, not source it. Yes, apparently you did next time I’ll zoom out a bit more when looking at a picture.
SN74LS08N – Texas Instruments – PCB Footprint & Symbol Download
Read times previous topic – next topic. I am only powering the IC.
Now with Unlimited Eagle board sizes! Email Required, but never shown. Here are the datasheets: The chip should not heat up. CrossRoads on Dec 29, Start creating good wiring habits.
Make sure that the inputs are within data sheet spec DVM again, at least for the DC levels- scope is better. CMOS is symmetrical and you can drive loads either way.
Not the wire colour Make sure power’s on pin 14 and ground is on pin 7. Sign up or log in Sign up using Google.
(PDF) SN74LS08N Datasheet download
The last thing you did is where you should start looking. Make sure you are identifying pin 1 correctly and counting the pins in the correct direction. I am not using any resistors. Unconnected inputs are not good news for CMOS logic though, can cause oscillations and higher power consumption.
SN74LS08N and SN74LS05N doesn’t work?
sn74lw08n A complete newbie question here: Terminate dagasheet High or Low as needed. That would tend to let the magic smoke out I meant you could make use of the breadboard bus marked with a blue line. Once you see the outputs from the AND gates acting like they should, hook them up to the next stage. You 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. Sign up using Email and Password.
LarryD on Dec 29, Power it with 5V. The datasheet says that it requires a minimum of 4. I hope this quality is good enough.
Apologies if I am missing something obvious, I am a first year EE student. You would fare better to use modern CMOS families like 74HC, so 74HC08 and gates, 74HC14 not gates everyone uses the ’14 because it has schmitt-trigger inputs which are very useful for signal conditioning. If it does, try a different chip- the original one may have been fried. Home Questions Tags Users Unanswered.