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  • Question

  • Refer to the figure given below. What type of device is shown and what input levels are required to turn the LED off?

    Refer to the figure given below. What type of device is shown and what input levels are required to


  • Options
  • A. The device is an open-collector AND gate and requires both inputs to be HIGH in order to turn the LED off.
  • B. The device is a Schottky AND gate and requires only one low input to turn the LED off.
  • C. The device is an open-collector AND gate and requires only one low input to turn the LED off.
  • D. The device is a Schottky open-collector AND gate and requires a low on both inputs to turn the LED off.

  • Correct Answer
  • The device is an open-collector AND gate and requires both inputs to be HIGH in order to turn the LED off. 

    • More questions

    • 1. The JTAG signals are named TDI, TDO, TMS, and TCK.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. The exclusive-OR provides a LOW input if one input or the other input is HIGH.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. A burst refresh and a normal memory operation of a DRAM can be interspersed.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. When extremely critical timing is required, a quartz crystal can be used.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. How many 2K × 8 ROM chips would be required to build a 16K × 8 memory system?

    • Options
    • A. 2
    • B. 4
    • C. 8
    • D. 16
      • Discuss
    • 6. Which of the following memories uses a MOS capacitor as its memory cell?

    • Options
    • A. SRAM
    • B. DRAM
    • C. ROM
    • D. FIFO
      • Discuss
    • 7. The checksum method is used to test ________.

    • Options
    • A. ROM
    • B. EEPROM
    • C. FPLA
    • D. RAM
      • Discuss
    • 8. In a register stack, data moves up but not down.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. The decimal number for octal 748 is ________.

    • Options
    • A. 74
    • B. 60
    • C. 22
    • D. 62
      • Discuss
    • 10. What is the resultant binary of the decimal problem 49 + 01 =?

    • Options
    • A. 01010101
    • B. 00110101
    • C. 00110010
    • D. 00110001
      • Discuss

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