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Mr. Dubey • 51.43K Points
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Q.) What should be done to unused inputs on TTL gates?

(A) they should be left disconnected so as not to produce a load on any of the other circuits and to minimize power loading on the voltage source.
(B) all unused gates should be connected together and tied to v through a 1 k resistor.
(C) all unused inputs should be connected to an unused output; this will ensure compatible loading on both the unused inputs and unused outputs.
(D) unused and and nand inputs should be tied to vcc through a 1 k resistor; unused or and nor inputs should be grounded.
Correct answer : Option (D) - unused and and nand inputs should be tied to vcc through a 1 k resistor; unused or and nor inputs should be grounded.

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