What should be done to unused inputs on TTL gates?
A) Unused AND and NAND inputs should be tied to Vcc through a 1k-ohm resistor; unused OR and NOR inputs should be grounded.
B) All unused gates should be connected together and tied to Vcc through a 1k-ohm resistor.
C) All unused inputs should be connected to an unused output; this will insure compatible loading on both the unused inputs and unused outputs.
D) 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.
A
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