Part Number: 74LS, Maunfacturer: Motorola, Part Family: 74, File type: PDF, Document: Datasheet – semiconductor. These 8-bit shift registers feature gated serial inputs and an asynchronous clear. A low logic level at either input inhibits entry of the new data, and resets the first. This 8-bit shift register features gated serial inputs and an asynchronous reset. The gated serial inputs (A and B) permit complete control over incoming data as a.

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This seems to contradict any basic understanding of physics I thought I had.

Search field Part name Part description. Low Level Input Voltage. Maximum Ratings are those values beyond which damage to the device may occur.

74LS (SLS) – 8-bit Serial-input/parallel-output Shift Register | eet

Functional operation should be restricted to the Recommended Operating Conditions. High Level Output Current. High Level Output Current. Hold Time, Clock to A1 or A2.

And, if that is the case, then why is it not working? I’m simply poking my multimeter at the pin and the common ground Or am i maybe measuring the voltage in a wrong way? Not more than one output should be shorted at a time, and duration should not exceed one second. I googled around, and most of the internet seems to agree that a pull-up and pull-down resistors are nice and all, but shouldn’t really be an absolute necessity for a simple thing like this and, I don’t quite ‘grok’ them b I was afraid that I somehow fried my ICs, but noone else seems to have a problem connecting them directly to their power supply.

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This doesn’t seem right. Thanks, and sorry that this post got rather lengthy. High Level Input Voltage. I also posted this question over at Electronic Circuits on Discovercircuits. Could I simply buy a handful of the same ones, or does the difference actually make a huge difference, somehow?

Now that that’s cleared up: High Level Output Voltage. Articles Top Articles Search resources.

74LS164 PDF Datasheet浏览和下载

Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at You do not datasgeet a pull down resistor. This 8-bit shift register features gated serial inputs and an. IF the pin is NOT being used for any function, ie: I am using the 5V up to 2Amps cables of an old external hard drive power supply to power this thing. That didn’t nudge the 1. I am a complete beginner, so please excuse any incredibly stupid mistakes i made! If I have a shared clock signal for both the ICs which seems to be a common praticeAs stated when inputs are connected to output pins, NO pull ups.

High Level Input Current.

Low Level Input Current. This 8-bit shift register features gated serial inputs and an. Read the above entry d it seems that the LS type ICs are famous for their floating voltages and sensitivity – is there some other type of IC that might be more forgiving for a beginner? Low Level Output Voltage. Since I am still a bit confused about the whole pull-down and pull-up thing I have read about it, but it still didn’t really sink inI tried the following: In my so-called diagram, I drew what I would have thought to be a pull-up resistor on the signal pins in red.


Datasheet «SN54/74LS164»

In you diagram, you included 3 different capacitators 22nF, nF and uF. You could add 2 or 3, 22nF’s in place of the nF. You need pull downs on both your push buttons. Low Level Output Current. If I understood the datasheet’s diagram correctly, there’s an AND gate on the two input pins, so I think both have to be high – but that doesn’t really matter, since I simply connected the two datssheet.

A high level input 7l4s164 the other input which will then determine the state of the first flip-flop. You must log in or register to reply here.

74LS (SLS) – 8-bit Serial-input/parallel-output Shift Register | eet

Hello, again, 74l164 thank you all very much for your help. The gated serial datashwet A and B permit complete control over incoming data as a low at either or both input s inhibits entry of the new data and resets the first flip flop to the low level at the next clock pulse.

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What is the standard way of doing this? Propagation Delay Time, Clock to Q.