# DATASHEET 74151 PDF

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Discussion in ‘ General Electronics Chat ‘ started by atrumbloodMay 13, May 13, 1.

May 13, 59 2. Hello everyone, I am new to the allaboutcircuits forums.

### Datasheet(PDF) – National Semiconductor (TI)

I am here in hopes that I can gain some better understanding on how to use multiplexors. After trying to teach my self how to use one of them. I get that high and low refer to the voltage, but I feel I am missing something. For your reference Datashet have included a link to the datasheet.

May 13, 2.

Oct 2, 17, 5, Firstly, you have to begin with basic digital logic and boolean algebra. How much of this do you understand?

## Datasheets search archive of electronic components datasheets

In series digital logic, a 0 is represented by a voltage between 0V and 0. Digital inputs usually are fed from another digital output. Sometimes GND and Vcc are substituted for digital logic levels.

The is an 8-line to 1-line data selector.

### Hoja de datos ( Datasheet PDF ) – Data Selectors/Multiplexers

In order to specify which one of eight channels to select, a 3-bit select code is required. A 3-bit code can have 8 possible values, 0 to 7. This is called a 3-bit binary coded decimal. This is where knowing the binary number sequence is important.

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There are only 10 types of people in the world, those who understand binary and those who don’t. May 13, datashret. Apr 24, 7, 1, Actually this chip on page 4 lists a zero as 0.

May 13, 4. Shucks, I knew the spec sheet said 0. I should have realized that someone on AAC will be looking over my shoulder and checking up on me. Sorry, I’ll stick to the facts next time. May 13, 5. May 13, 6. Apr 14, 7, May 14, 7. G with a line over the G. Sorry, I don’t datasheft how to apply overstrike so I datasheeet use G’.

Y will follow the selected input only when G’ is LOW. May 14, 8. I’m in trouble now. May 14, 9. May 14, So if I understand the active low thing correctly with the strobe. Do I have this right.

In other words becomes ? Or to put it another way it inverts the datashedt Sorry if these questions are a little annoying. I have to put things into a way that I can make sense of them before I can say I have understood something.

Here is how I have the hooked up on my breadboard see attachment to try and test out the functionality. I am having an issue getting any signal to come through. Unless I am completely wrong in my understanding. Shouldn’t the way I have that hooked up light up the LED? Can you post a well focused photo of your breadboard? Here is the pic you requested. The led on the far left top of the photo is just there to show that the power is on.

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May 16, Sorry about the late response. So I made some changes to my bread board configuration. My power supply was not exactly 5 volts it was more like 12V! Ya that was a face palm moment. So I hooked up an LM to my bread board and dropped the voltage down to 5v. This is why I had the resistors. I must have been very tired when I tried to throw this project together. Any way, here is a pick of the new set up.

This time I have the ground connected to the right rail.