Q1. Which of the following will not normally be found on a data sheet?.
A. Minimum HIGH level output voltage.
B. Maximum LOW level output voltage.
C. Minimum LOW level output voltage.
D. Maximum HIGH level input current.
Answer= Minimum LOW level output voltage
Q2. Which of the following logic families has the shortest propagation delay?.
A. S-TTL.
B. AS-TTL.
C. HS-TTL.
D. HCMOS.
Answer= AS-TTL
Q3. Which of the following summarizes the important features of ECL?.
A. Low noise margin, low output voltage swing, negative voltage operation, fast, and high power consumption.
B. Good noise immunity, negative logic, high freQncy capability, low power dissipation, and short propagation time.
C. Slow propagation time, high freQncy response, low power consumption, and high output voltage swings.
D. Poor noise immunity, positive supply voltage operation, good low freQncy operation, and low power.
Answer= Low noise margin, low output voltage swing, negative voltage operation, fast, and high power consumption
Q4. What causes low-power Schottky TTL to use less power than the 74XX series TTL?.
A. The Schottky-clamped transistor.
B. Nothing. The 74XX series uses less power..
C. A larger value resistor.
D. Using NAND gates.
Answer= A larger value resistor
Q5. What are the major differences between the 5400 and 7400 series of ICs?.
A. The 5400 series are military grade and require tighter supply voltages and temperatures..
B. The 5400 series are military grade and allow for a wider range of supply voltages and temperatures..
C. The 7400 series are an improvement over the original 5400s..
D. The 7400 series was originally developed by Texas Instruments. The 5400 series was brought out by National Semiconductors after TI's patents expired, as a second supply source..
Answer= The 5400 series are military grade and allow for a wider range of supply voltages and temperatures.
Q6. Which of the following statements apply to CMOS devices?.
A. The devices should not be inserted into circuits with the power on..
B. All tools, test equipment, and metal workbenches should be tied to earth ground..
C. The devices should be stored and shipped in antistatic tubes or conductive foam..
D. All of the above..
Answer= All of the above.
Q7. What is the static charge that can be stored by your body as you walk across a carpet?.
A. 300 volts.
B. 3,000 volts.
C. 30,000 volts.
D. Over 30,000 volts.
Answer= Over 30,000 volts
Q8. Which of the following logic families has the highest noise margin?.
A. TTL.
B. LS TTL.
C. CMOS.
D. HCMOS.
Answer= HCMOS
Q9. A "floating" TTL input may be defined as:.
A. unused input that is tied to Vcc through a 1 k resistor..
B. unused input that is tied to used inputs..
C. unused input that is tied to the ground..
D. unused input that is not connected..
Answer= unused input that is not connected.
Q10. Which of the logic families listed below allows the highest operating freQncy?.
A. 74AS.
B. ECL.
C. HCMOS.
D. 54S.
Answer= ECL
Q11. What is the increase in switching speed between 74LS series TTL and 74HC/HCT (High-Speed CMOS)?.
A. 5.
B. 10.
C. 50.
D. 100.
Answer= 10
Q12. Generally, the voltage measured at an unused TTL input would typically be measured between:.
A. 1.4 to 1.8 V..
B. 0 to 5 V..
C. 0 to 1.8 V..
D. 0.8 to 5 V..
Answer= 1.4 to 1.8 V.
Q13. The IEEE/ANSI notation of an internal underlined diamond denotes:.
A. totem-pole outputs..
B. open-collector outputs..
C. quadrature amplifiers..
D. tristate buffers..
Answer= open-collector outputs.
Q14. The bipolar TTL logic family that was developed to increase switching speed by preventing transistor saturation is:.
A. emitter-coupled logic (ECL)..
B. current-mode logic (CML)..
C. transistor-transistor logic (TTL)..
D. emitter-coupled logic (ECL) and transistor-transistor logic (TTL)..
Answer= emitter-coupled logic (ECL) and transistor-transistor logic (TTL).
Q15. Which statement below best describes the function of a decoder?.
A. A decoder will convert a decimal number into the proper binary equivalent..
B. A decoder will convert a binary number into a specific output representing a particular character or digit..
C. Decoders are used to prevent improper operation of digital systems..
D. Decoders are special ICs that are used to make it possible for one brand of computer to talk to another..
Answer= A decoder will convert a binary number into a specific output representing a particular character or digit.
Q16. One can safely state that the output lines for a demultiplexer are under the direct control of the:.
A. input data select lines..
B. the internal AND gates..
C. the internal OR gate..
D. Input data line..
Answer= input data select lines.