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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Home Questions Tags Users Unanswered. The 74LS08 circuit issue must be a wiring one.
I’m not using any of the AND gates. Once you have a nicely quiescent, powered up chip that doesn’t try to immolate itself you can start adding logic inputs and looking at the outputs. I hope this quality is good enough. MarkT Brattain Member Posts: 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.
The last thing you did is where you should sn74ls008n looking. I’ve dwtasheet 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. The 74LS05 circuit cannot work as that’s an open-collector chip – the outputs can only sink current, not source it. The datasheet says that it requires a minimum of 4. Power it with 5V.
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. Email Required, but never shown.
Make sure power’s on pin 14 and ground is on pin 7. LarryD on Dec 29, I am not using any resistors. You would fare better to use modern CMOS families like 74HC, so 74HC08 and gates, 74HC14 not gates datasueet uses the ’14 because it has schmitt-trigger inputs which are very useful for signal conditioning.
Note that I OL is 8mA, which is the recommended sink current. All logic circuits need decoupling as a matter of course, right next to each chip. Make sure that the inputs are within data sheet spec DVM again, at least for the DC levels- scope is better. That would tend to let the magic smoke out CMOS is symmetrical and you can drive loads either way.
Now with Unlimited Eagle board sizes! Look for I OH. This is the recommended operating current that can be sourced. Once you see the outputs from the AND gates acting like they should, hook them up to the next stage. Sign up using Email and Password. Glad things are working now. A complete newbie question here: Check with a DVM to make sure you have things hooked up correctly and that the voltage is correct.
Sign up using Facebook. I am only powering the IC.
SN74LS08N Datasheet pdf – QUAD 2-INPUT AND GATE – Motorola
Post as a guest Name. BobT 5 7.
Sign up or log in Sign up using Google. Start creating good wiring habits. The chip should not heat up.
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Not the wire colour Disconnect everything but power and ground. See my previous post for output driving currents and suggestion.