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- Question
What must be done to interface TTL to CMOS?
Options- A. A dropping resistor must be used on the CMOS 12 V supply to reduce it to 5 V for the TTL.
- B. As long as the CMOS supply voltage is 5 V, they can be interfaced; however, the fan-out of the TTL is limited to five CMOS gates.
- C. A 5 V Zener diode must be placed across the inputs of the TTL gates in order to protect them from the higher output voltages of the CMOS gates.
- D. A pull-up resistor must be used between the TTL output-CMOS input node and Vcc; the value of RP will depend on the number of CMOS gates connected to the node.
- Correct Answer
- A pull-up resistor must be used between the TTL output-CMOS input node and Vcc; the value of RP will depend on the number of CMOS gates connected to the node.
- 1. The problem of interfacing IC logic families that have different supply voltages (VCC's) can be solved by using a:
Options- A. level-shifter
- B. tristate shifter
- C. decoupling capacitor
- D. pull-down resistor Discuss
- 2. Hexadecimal 12 is ________in binary.
Options- A. 00010111
- B. 00010100
- C. 00010010
- D. 00100001 Discuss
- 3. A NAND gate has:
Options- A. active-LOW inputs and an active-HIGH output.
- B. active-LOW inputs and an active-LOW output.
- C. active-HIGH inputs and an active-HIGH output.
- D. active-HIGH inputs and an active-LOW output. Discuss
- 4. The 8051 is a 40-pin IC. Twenty-two pins are needed for the four I/O ports.
Options- A. True
- B. False Discuss
- 5. What gives a GAL its flexibility?
Options- A. Its speed
- B. Its reprogrammable EPROM
- C. Its large logic arrays
- D. Its programmable OLMCs Discuss
- 6. FPGA is the acronym for ________.
Options- A. Flexible Programming [of] Generic Assemblies
- B. Field Programmable Generic Array
- C. Field Programmable Gate Array
- D. Field Programmer's Gate Assembly Discuss
- 7. The binary adder circuit is designed to add ________ binary numbers at the same time.
Options- A. 2
- B. 4
- C. 6
- D. 8 Discuss
- 8. When using edge-triggered flip-flops, the data is entered into the flip-flop on the leading edge of the clock, but the output does not change until the trailing edge of the clock.
Options- A. True
- B. False Discuss
- 9. The 74LS382 ALU is a 24-pin arithmetic/logic unit.
Options- A. True
- B. False Discuss
- 10. A look-up table is simply a truth table with all the possible output connections listed with their desired input response.
Options- A. True
- B. False Discuss
More questions
Correct Answer: level-shifter
Correct Answer: 00010010
Correct Answer: active-HIGH inputs and an active-LOW output.
Correct Answer: False
Correct Answer: Its programmable OLMCs
Correct Answer: Field Programmable Gate Array
Correct Answer: 2
Correct Answer: False
Correct Answer: False
Correct Answer: False
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