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Home ‣ Digital Electronics ‣ Logic Gates See What Others Are Saying!
  • Question

  • A logic probe is again applied to the pins of a 7421 IC with the following results. Is there a problem with the circuit and if so, what is the problem?

    A logic probe is again applied to the pins of a 7421 IC with the following results. Is there a probl


  • Options
  • A. Pin 6 should be ON.
  • B. Pin 8 should be ON.
  • C. Pin 8 should be pulsing.
  • D. no problem

  • Correct Answer
  • no problem 

    • More questions

    • 1. The decimal number system consists of the digits 0?10.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A crystal demonstrates the ________ effect when a mechanical force across the crystal causes a small voltage to be generated.

    • Options
    • A. photoelectric
    • B. Co-pitts
    • C. piezoelectric
    • D. flywheel
      • Discuss
    • 3. The Ex-NOR is sometimes called the ________.

    • Options
    • A. parity gate
    • B. equality gate
    • C. inverted OR
    • D. parity gate or the equality gate
      • Discuss
    • 4. Linearity error is the maximum deviation in step size from the ideal step size.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. In odd parity, 100011010 would pass the parity check.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. ASCII stands for American Standard Code for Information Interchange.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. A seven-segment, common-anode LED display is designed for:

    • Options
    • A. all cathodes to be wired together
    • B. one common LED
    • C. a HIGH to turn off each segment
    • D. disorientation of segment modules
      • Discuss
    • 8. Ten TTL loads per TTL driver is known as:

    • Options
    • A. noise immunity
    • B. fan-out
    • C. power dissipation
    • D. propagation delay
      • Discuss
    • 9. The GAL chip uses an EEPROM array that is erasable and reprogrammable at least 1000 times.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. The major structures of the MAX7000S are the logic array block (LAB) and the programmable intermediate array (PIA).

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

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