Multisim and Ultiboard

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Testing 74LS75 D latch

Hi All,


I have been trying to run a simulation of 74LS75 D Latch. Here is an image of my simulation:

74LS75 Problem.PNG

For some reason, the simulation does not work correctly (as seen from the current reading of 1.776 uA). What am I missing here?

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Hi Smetho,


Welcome to our forums!


What is the specific problem that you are experiencing?


If you want 1Q1 to follow 1D1 the enable signal must be high. In this case the enable signal is 1LE and not 2LE. The enable 2LE is for the latches 2 and 3.




Is this helpful?



Andres G,


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