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Home Digital Electronics Integrated-Circuit Logic Families Comments

  • Question
  • The data sheet for the 74 series of TTL ICs shows that Vcc has a range of 4.5 V to 5.5 V.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 


  • Integrated-Circuit Logic Families problems


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    • 1. The noise margin for TTL is 0.8 V.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. A common means for measuring and comparing the overall performance of an IC family is the speed-power product.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. The time it takes for a square wave to go from 10% to 90% of its voltage level is called propagation delay.

    • Options
    • A. True
    • B. False
    • Discuss
    • 4. Usually P-MOS and N-MOS circuits are identical with the exception of the voltage polarities.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. The TTL HIGH level source current is higher than the LOW level sinking current.

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. The dc noise margins calculated using the proper values from a standard TTL data sheet are the worst-case margins. The typical dc noise margins are usually somewhat higher.

    • Options
    • A. True
    • B. False
    • Discuss
    • 7. The logic family with the highest maximum clock frequency is HS-TTL.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. ECL gates are noted for their high frequency capability and small output voltage swing.

    • Options
    • A. True
    • B. False
    • Discuss
    • 9. The upper transistor of a totem-pole output is OFF when the gate output is low.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. The major advantage of TTL logic circuits over CMOS is lower propagation delay.

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


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