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Fan-out for a typical TTL gate is ________
Which of the following logic families has the shortest propagation delay
Generally, the voltage measured at an unused TTL input would typically be measured between
0 to 1.8 V.
1.4 to 1.8 V.
0.8 to 5 V.
0 to 5 V.
Refer the givenfigure.
Which of the following describes the operation of the circuit
A HIGH input turns Q1, Q2, and Q4 on; Q3 is off.
A LOW input turns Q1 and Q3 on; Q2 and Q4 are off.
A HIGH input turns Q1, Q2, and Q3 off, and Q4 is on.
A LOW input turns Q1 and Q4 off; Q2 and Q3 are on.
The 74F-Fast TTL integrated-circuit fabrication technique uses reduced interdevice ________ to achieve reduced propagation delays
Logic circuits that are designated as buffers, drivers, or buffer/drivers are designed to have
greater input current/voltage capability than an ordinary logic circuit.
a smaller output current/voltage capability than an ordinary logic.
greater input and output current/voltage capability than an ordinary logic circuit.
a greater current/voltage capability than an ordinary logic circuit.
A logic signal experiences a delay in going through acircuit.
The two propagation delay times are defined as
tPLH and tPHL.
tDLH and tDHL.
tHPL and tlph.
tLDH and tHDL.
The proliferation of small handheld consumer equipment such as digital video cameras, cellular phones, handheld computers (________), portable audio systems, and other devices has created a need for logic circuits in very small packages
What are the major differences between the 5400 and 7400 series of ICs
The 7400 series are an improvement over the original 5400s.
The 5400 series are military grade and require tighter supply voltages and temperatures.
The 5400 series are military grade and allow for a wider range of supply voltages and temperatures.
Which of the following will not normally be found on a data sheet
Minimum LOW level output voltage
Maximum LOW level output voltage
Minimum HIGH level output voltage
Maximum HIGH level input current
The propagation delay of standard TTL gates is approximately ________
Propagation delay is important because ________
it limits the maximum operating frequency of a gate
all the gates in a system must have the same propagation times in order to be compatible
the logic gates must be given a short break during each clock cycle or else they will overheat
When the output of a standard TTL gate is HIGH, it can ________
sink a maximum of 400 A from no more than 10 load gates
sink 16 mA of current from the attached input gates
source 400 A of current to no more than 10 attached gates
source 16 mA of current to no more than 10 attached gates
A ________ is a testing and troubleshooting tool that generates a short-duration pulse when manually activated, usually by depressing a push button
What is the increase in switching speed between 74LS series TTL and 74HC/HCT (High-Speed CMOS)
The output stage of a TTL gate is a special design called ________
________ output levels would not be a valid LOW for a TTL gate
All of the above.
The lower transistor of a totem-pole output is saturated when the gate output is ________
The HIGH logic level for a standard TTL output must be at least ________
When VGS = 0 on an N-channel MOSFET switch, there is no ________ between the source and the drain
The number of gates that can be connected to a single output without exceeding the current ratings of the gate is called ________
What is the static charge that can be stored by your body as you walk across a carpet
Over 30,000 volts
What type of circuit is shown below and which statement best describes its operation
It is a two-input CMOS buffer with tristate output.
It is a two-input CMOS AND gate with open drain.
It is a hybrid TTL-CMOS inverter with FET totem-pole output.
It is a CMOS inverter with tristate output.
A logic probe is placed on the input of a digital circuit and the probe lamp blinks slowly, indicating ________
that an open or bad logic level exists
a high level output
a high-frequency pulse train
that the supply voltage is low
When the outputs of several open-collector TTL gates are connected together, the gate outputs ________
usually burn out
produce more voltage
are ANDed together
produce more fan-out
Which of the following logic families has the highest maximum clock frequency
One advantage that MOSFET transistors have over bipolar transistors is ________
low input impedance
reduced propagation delay
high input impedance
higher switching speed
In a DIP the spacing between pins is typically ________
The power dissipation of a CMOS IC will ________
decrease with gate size
increase with gate size
decrease with frequency
increase with frequency
Which of the following statements apply to CMOS devices
All of the above.
All tools, test equipment, and metal workbenches should be tied to earth ground.
The devices should be stored and shipped in antistatic tubes or conductive foam.
The devices should not be inserted into circuits with the power on.