Question 1

Which of the following MOST accurately lists the advantages of MOS ICs over TTL ICs?

Accepted Answer

A)   Occupy more space, are less expensive to manufacture, are bipolar devices, and normally do not use IC resistor elements
B)   Occupy less space, operate faster, are less expensive to manufacture, and consume less power
C)   Occupy less space, operate faster, and are easier to fabricate
D)   Occupy less space, require fewer external connections, are unipolar devices, and normally do not use IC resistor elementsE) A) and D)
F) A) and C)

Question 2

Suppose the data sheet for a standard TTL four NOR gate IC lists values of: Icch = 6 ma, Iccl = 16 ma, and Vcc = 5 v. What is the average power dissipated by each gate?

Accepted Answer

A)   50 mw
B)   55 mw
C)   13.75 mw
D)   12.50 mwE) A) and D)
F) A) and B)

Question 3

For conduction, a P- channel MOSFET switch would require a____ VDD and a ____ VGS.

Accepted Answer

A)   negative, positive
B)   positive, positive
C)   negative, negative
D)   positive, negativeE) None of the above
F) A) and D)

Question 4

The DC high- state noise margin is the difference between the:

Accepted Answer

A)   highest possible HIGH output and the minimum input voltage required for a HIGH.
B)   lowest possible HIGH output and the maximum input voltage required for a HIGH.
C)   highest possible HIGH output and the maximum input voltage required for a HIGH.
D)   lowest possible HIGH output and the minimum input voltage required for a HIGH.E) C) and D)
F) None of the above

Question 5

Determine the output state for a TTL NOR gate that has all of its inputs floating.

Accepted Answer

A)   HIGH
B)   LOW
C)   IndeterminateD) All of the above
E) B) and C)

Question 6

A certain TTL series has a fan- out of 20. This means the series is capable of driving a total of 20 input devices of any series.

Accepted Answer

A) True 
 B)False

Question 7

An IC is rated IOH(max)  = 600 µA and IOL(max)  = 60 mA. Express the IC's fan- out in terms of standard TTL unit loads (UL) .

Accepted Answer

A)   HIGH state = 8 UL, LOW state = 10 UL
B)   HIGH state = 12 UL, LOW state = 18 UL
C)   HIGH state = 2.5 UL, LOW state = 1.5 UL
D)   HIGH state = 15 UL, LOW state = 37.5 ULE) All of the above
F) B) and C)

Question 8

When interfacing components in a circuit, "transmission line" issues can be avoided if the components are placed no more than ______from each other.

Accepted Answer

A)   1.51 feet
B)   9 inches
C)   4 feet
D)   4 inchesE) A) and D)
F) B) and D)

Question 9

Integrated circuits are best suited for information processing applications.

Accepted Answer

A) True 
 B)False

Question 10

The primary advantage of ECL over TTL is that ECL circuits have:

Accepted Answer

A)   very short propagation delay times.
B)   low noise margins.
C)   constant current drain.
D)   Both A and CE) None of the above
F) A) and B)

Question 11

The main difference between an SN7402 and an SN5402 would be:

Accepted Answer

A)   the SN7402 contains NOR gates where the SN5402 contains NAND gates.
B)   the SN5402 contains NOR gates where the SN7402 contains NAND gates.
C)   the SN5402 is able to operate over a wider range of temperatures and power supply voltages.
D)   the SN7402 is able to operate over a wider range of temperatures and power supply voltages.E) All of the above
F) B) and C)

Question 12

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.

Accepted Answer

A) True 
 B)False

Question 13

A device used to compare an analog voltage to a reference value, for the purpose of generating a digital signal is called a(n) :

Accepted Answer

A)   analog limiter.
B)   step inverter.
C)   digital converter.
D)   comparator.E) B) and C)
F) A) and B)

Question 14

The voltage measured at an unused TTL input typically falls in the range of:

Accepted Answer

A)   0.8 to 5 V
B)   1.4 to 1.8 V
C)   0 to 5 V
D)   0 to 1.8 VE) A) and B)
F) A) and C)

Question 15

The maximum number of inputs an output can drive reliably is called fan- out.

Accepted Answer

A) True 
 B)False

Question 16

P- MOS and N- MOS circuits are usually identical with the exception of the voltage polarities.

Accepted Answer

A) True 
 B)False

Question 17

A TTL data sheet lists the following values for the 74LS190 synchronous counter: IOH(max)  = - 0.4 mA, IOL(max)  = 8 mA, IIH(max)  = 60 µA, and IIL(max)  = - 1.2 mA. Determine the same series

Accepted Answer

A)   2
B)   4
C)   6
D)   5E) None of the above
F) B) and C)

Question 18

Tri- state outputs include ______state in which logic low is at ground potential.

Accepted Answer

The answer of Tri- state outputs include ______state in which...

Question 19

Devices using single- ended interfaces have better noise immunity than those using differential signaling.

Accepted Answer

A) True 
 B)False

Question 20

-Refer to Table 8- 1. Which of the series listed would be best suited for operating in a portable battery powered circuit at 100 MHz?

Accepted Answer

A)   74S
B)   74F
C)   74AS
D)   74ALSE) A) and B)
F) A) and C)

Exam 8: Integrated-Circuit Logic Families

Determine the output state for a TTL NOR gate that has all of its inputs floating.

Correct AnswerverifiedShow Answer

An IC is rated IOH(max) = 600 µA and IOL(max) = 60 mA. Express the IC's fan- out in terms of standard TTL unit loads (UL) .

Correct AnswerverifiedShow Answer

For conduction, a P- channel MOSFET switch would require a____ VDD and a ____ VGS.

Correct AnswerverifiedShow Answer

The main difference between an SN7402 and an SN5402 would be:

Correct AnswerverifiedShow Answer

Suppose the data sheet for a standard TTL four NOR gate IC lists values of: Icch = 6 ma, Iccl = 16 ma, and Vcc = 5 v. What is the average power dissipated by each gate?

Correct AnswerverifiedShow Answer

The maximum number of inputs an output can drive reliably is called fan- out.

Correct AnswerverifiedShow Answer

A certain TTL series has a fan- out of 20. This means the series is capable of driving a total of 20 input devices of any series.

Correct AnswerverifiedShow Answer

When interfacing components in a circuit, "transmission line" issues can be avoided if the components are placed no more than ______from each other.

Correct AnswerverifiedShow Answer

A TTL data sheet lists the following values for the 74LS190 synchronous counter: IOH(max) = - 0.4 mA, IOL(max) = 8 mA, IIH(max) = 60 µA, and IIL(max) = - 1.2 mA. Determine the same series

Correct AnswerverifiedShow Answer

Tri- state outputs include ______state in which logic low is at ground potential.

Correct AnswerverifiedShow Answer

The DC high- state noise margin is the difference between the:

Correct AnswerverifiedShow Answer

Which of the following MOST accurately lists the advantages of MOS ICs over TTL ICs?

Correct AnswerverifiedShow Answer

Integrated circuits are best suited for information processing applications.

Correct AnswerverifiedShow Answer

P- MOS and N- MOS circuits are usually identical with the exception of the voltage polarities.

Correct AnswerverifiedShow Answer

Devices using single- ended interfaces have better noise immunity than those using differential signaling.

Correct AnswerverifiedShow Answer

A device used to compare an analog voltage to a reference value, for the purpose of generating a digital signal is called a(n) :

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

The primary advantage of ECL over TTL is that ECL circuits have:

Correct AnswerverifiedShow Answer

The voltage measured at an unused TTL input typically falls in the range of:

Correct AnswerverifiedShow Answer

-Refer to Table 8- 1. Which of the series listed would be best suited for operating in a portable battery powered circuit at 100 MHz?

Correct AnswerverifiedShow Answer

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An IC is rated I_OH(max)= 600 µA and I_OL(max)= 60 mA. Express the IC's fan- out in terms of standard TTL unit loads (UL) .

Correct Answer
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For conduction, a P- channel MOSFET switch would require a____ V_DDand a ____ V_GS.

Correct Answer
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Suppose the data sheet for a standard TTL four NOR gate IC lists values of: I_cch= 6 ma, I_ccl= 16 ma, and V_cc= 5 v. What is the average power dissipated by each gate?

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A TTL data sheet lists the following values for the 74LS190 synchronous counter: I_OH(max)= - 0.4 mA, I_OL(max)= 8 mA, I_IH(max)= 60 µA, and I_IL(max)= - 1.2 mA. Determine the same series

Correct Answer
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