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Home ‣ Digital Electronics ‣ Integrated-Circuit Logic Families See What Others Are Saying!
  • Question

  • A "floating" TTL input may be defined as:


  • Options
  • A. unused input that is tied to Vcc through a 1 k Ω resistor.
  • B. unused input that is tied to used inputs.
  • C. unused input that is tied to the ground.
  • D. unused input that is not connected.

  • Correct Answer
  • unused input that is not connected. 

    • More questions

    • 1. A J-K flip-flop and associated waveforms are shown below. The circuit is operating properly.


    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Convert the following binary number to decimal.
      010112

    • Options
    • A. 11
    • B. 35
    • C. 15
    • D. 10
      • Discuss
    • 3. Expanders make it possible to increase the number of terms in a programmable SOP operation.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The design concept of using building blocks of circuits in a PLD program is called a(n):

    • Options
    • A. hierarchical design.
    • B. architectural design.
    • C. digital design.
    • D. verilog.
      • Discuss
    • 5. On a master-slave flip-flop, when is the master enabled?

    • Options
    • A. when the gate is LOW
    • B. when the gate is HIGH
    • C. both of the above
    • D. neither of the above
      • Discuss
    • 6. Hexadecimal is used to encode BCD numbers.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. If one input to a 2-input AND gate is HIGH, the output reflects the other input.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. The stack is a data storage area in RAM used by certain microprocessor operations.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. Eight states are in an 8-bit Johnson counter sequence.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Convert BCD 0001 0010 0110 to binary.

    • Options
    • A. 1111110
    • B. 1111101
    • C. 1111000
    • D. 1111111
      • Discuss

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