COMPUTER SCIENCE AND ENGINEERING
DIGITAL LOGIC
Question
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An AND gate has 7 inputs.How many input words are in its truth table?
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16
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32
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64
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128
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Explanation:
Detailed explanation-1: -Because it is an AND gate, the output will be 0 for 127 of the 128 input combinations, and 1 only if all inputs are 1 (last row).
Detailed explanation-2: -Most logic gates have two inputs and one output.
Detailed explanation-3: -This number grows exponentially at 2n, where n is the number of inputs. So, a 4-input AND gate has 16 possible combinations, 5 inputs would be 32 outputs, and so on.
Detailed explanation-4: -General Description. This device contains three independent gates each of which performs the logic AND function. Ordering Code: Devices also available in Tape and Reel.
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