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Home Digital Electronics Integrated-Circuit Logic Families Comments

  • Question
  • The maximum current for a LOW output on a standard TTL gate is 100 µA.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 


  • Integrated-Circuit Logic Families problems


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    • 1. The 74XX series TTL operates using saturated switching in which many of the transistors, when conducting, will be in the saturated condition.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. The fan-out of CMOS gates is frequency dependent.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. The CMOS series that is pin-compatible with the TTL family is the 4000 series.

    • Options
    • A. True
    • B. False
    • Discuss
    • 4. Power-supply decoupling uses a radio-frequency capacitor to short out high frequency spikes.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. A typical fan-out for most TTL is 9.

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. A major drawback in using ECL logic circuits in conjunction with TTL and MOS circuits is its negative supply voltages and logic levels.

    • Options
    • A. True
    • B. False
    • Discuss
    • 7. Integrated injection logic offers high component density and is easier to fabricate than TTL.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. The noise immunity of a logic circuit refers to the circuit's ability to tolerate noise by causing spurious charges in the output voltage.

    • Options
    • A. True
    • B. False
    • Discuss
    • 9. A current-sourcing transistor may also be referred to as a pull-down transistor.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. An unused input of a NAND gate can be left unconnected, pulled high by a pull-up resistor and tied together with another input and not change the logic output.

    • Options
    • A. True
    • B. False
    • Discuss


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