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.
Answer» 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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