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Home ‣ Digital Electronics ‣ Integrated-Circuit Logic Families Comments
- Question
________ TTL allows three possible output states.
Options- A. Triswitch
- B. Triinput
- C. Tristate
- D. Trident
- Correct Answer
- Tristate
- 1. The 74F-Fast TTL integrated-circuit fabrication technique uses reduced interdevice ________ to achieve reduced propagation delays.
Options- A. noise
- B. resistance
- C. capacitance
- D. inductance Discuss
- 2. The propagation delay of standard TTL gates is approximately ________.
Options- A. 2 µs
- B. 1 µs
- C. 4 ns
- D. 10 ns Discuss
- 3. The ________ is defined as the maximum number of standard logic inputs that an output can drive reliably.
Options- A. fan-drive
- B. fan-out
- C. fan-in
- D. open-collector Discuss
- 4. When the outputs of several open-collector TTL gates are connected together, the gate outputs ________.
Options- A. usually burn out
- B. produce more voltage
- C. are ANDed together
- D. produce more fan-out Discuss
- 5. The minimum input voltage recognized as HIGH by a TTL gate is ________.
Options- A. 2.0 V
- B. 2.4 V
- C. 0.8 V
- D. 5.0 V Discuss
- 6. One advantage that MOSFET transistors have over bipolar transistors is ________.
Options- A. high input impedance
- B. higher switching speed
- C. low input impedance
- D. reduced propagation delay Discuss
- 7. When the output of a standard TTL gate is HIGH, it can ________.
Options- A. sink 16 mA of current from the attached input gates
- B. source 400 µA of current to no more than 10 attached gates
- C. source 16 mA of current to no more than 10 attached gates
- D. sink a maximum of 400 µA from no more than 10 load gates Discuss
- 8. Totem-pole outputs ________ be connected ________ because ________.
Options- A. can, in parallel, sometimes higher output current is required
- B. cannot, together, if the outputs are in opposite states excessively high currents can damage one or both of the devices
- C. should, in series, certain applications may require higher output voltage
- D. can, together, together they can handle larger load currents and higher output voltages Discuss
- 9. A logic probe is placed on the input of a digital circuit and the probe lamp blinks slowly, indicating ________.
Options- A. that an open or bad logic level exists
- B. a high level output
- C. a high-frequency pulse train
- D. that the supply voltage is low Discuss
- 10. The lower transistor of a totem-pole output is saturated when the gate output is ________.
Options- A. overdriven
- B. HIGH
- C. LOW
- D. malfunctioning Discuss
Integrated-Circuit Logic Families problems
Search Results
Correct Answer: capacitance
Correct Answer: 10 ns
Correct Answer: fan-out
Correct Answer: are ANDed together
Correct Answer: 2.0 V
Correct Answer: high input impedance
Correct Answer: source 400 µA of current to no more than 10 attached gates
Correct Answer: cannot, together, if the outputs are in opposite states excessively high currents can damage one or both of the devices
Correct Answer: a high-frequency pulse train
Correct Answer: LOW
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