Digital Electronics - Combinational Logic Circuits - Discussion
Discussion Forum : Combinational Logic Circuits - General Questions (Q.No. 5)
5.
For the device shown here, let all D inputs be LOW, both S inputs be HIGH, and the 
input be HIGH. What is the status of the Y output?
Discussion:
28 comments Page 2 of 3.
Vinay said:
8 years ago
As given input not able to enable the mux so it has any previous value either low or high, so according to me, its don't care.
GHC said:
9 years ago
Here, the device is not be enabled and MUX not enabled will give an output of logic 0 (low).
Priyanka singh said:
9 years ago
We know that when enable pin is high then MUX will be operate but when enable pin is low then MUX willn't operate so option is incorrect.
Ujjal said:
9 years ago
When ENABLE input is high, which means to disable the device.
So, Output may go into High Impedance, and the answer is option D.
So, Output may go into High Impedance, and the answer is option D.
A.TEJASWINI said:
9 years ago
Can anyone tell me the correct answer for this question?
Aggression said:
9 years ago
If the device is not enabled, it should go in high impedance state which is denoted by "Z".
Chadrapaul said:
9 years ago
Please say correct answer.
Vikas said:
1 decade ago
An enable input makes the multiplexer operate. When EN = 0, the output is 0. When EN = 1, the multiplexer performs its operation depending on the selection line. In this case it is EN not.
Hagos said:
1 decade ago
Yes, I agree with you @Zion, because if the device is not working means its out put is low. So the answer is LOW.
Zion said:
1 decade ago
The device is "Not enable". NOT ENABLE = 0, 0=low. The answer is LOW.
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