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Integrated Circuit Technologies problems

  • 1. A certain gate draws 1.8 µA when its output is HIGH and 3.3 µA when its output is LOW. VCC is 5 V and the gate is operated on a 50% duty cycle. What is the average power dissipation (PD)?

  • Options
  • A. 2.55 µW
  • B. 1.27 µW
  • C. 12.75 µW
  • D. 5 µW
    • Discuss
  • 2. One output structure of a TTL gate is often referred to as a ________.

  • Options
  • A. totem-pole arrangement
  • B. diode arrangement
  • C. JBT arrangement
  • D. base, emitter, collector arrangement
    • Discuss
  • 3. The nominal value of the dc supply voltage for TTL and CMOS is ________.

  • Options
  • A. +3 V
  • B. +5 V
  • C. +9 V
  • D. +12 V
    • Discuss
  • 4. If ICCH is specified as 1.1 mA when VCC is 5 V and if the gate is in a static (noncharging) HIGH output state, the power dissipation (PD) of the gate is ________.

  • Options
  • A. 5.5 mW
  • B. 5.5 W
  • C. 5 mW
  • D. 1.1 mW
    • Discuss
  • 5. Which is not a precaution for handling CMOS?

  • Options
  • A. Devices should be placed with pins down on a grounded surface, such as a metal plate.
  • B. All tools, test equipment, and metal workbenches should be earth grounded.
  • C. CMOS devices should not be inserted into sockets or PC boards with the power on.
  • D. Wear wool clothes at all times.
    • Discuss
  • 6. Unused TTL inputs should be tied LOW.

  • Options
  • A. True
  • B. False
    • Discuss
  • 7. There are four different logic level ranges for TTL and CMOS: VIL, VIH, VOL, and VOH.

  • Options
  • A. True
  • B. False
    • Discuss
  • 8. ECL IC technology is faster than TTL technology.

  • Options
  • A. True
  • B. False
    • Discuss
  • 9. The speed-power product provides a basis for the comparison of logic circuits when power dissipation and propagation delay are important considerations in the selection of the type of logic to be used.

  • Options
  • A. True
  • B. False
    • Discuss
  • 10. A pull-down resistor must be used with open-collector TTL circuits.

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

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