Digital Electronics - Integrated Circuit Technologies

Exercise :: Integrated Circuit Technologies - General Questions

16. 

It is best not to leave unused TTL inputs unconnected (open) because of TTL's ________.

A. noise sensitivity
B. low-current requirement
C. open-collector outputs
D. tristate construction

Answer: Option A

Explanation:

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17. 

Which is not an output state for tristate logic?

A. HIGH
B. LOW
C. High-Z
D. Low-Z

Answer: Option D

Explanation:

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18. 

TTL is alive and well, particularly in ________.

A. industrial applications
B. educational applications
C. military applications
D. commercial applications

Answer: Option B

Explanation:

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19. 

A TTL NAND gate with IIH(max) of 40 A per input drives ten TTL inputs. How much current does the drive output source?

A. 40 A
B. 200 A
C. 400 A
D. 800 A

Answer: Option C

Explanation:

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20. 

A certain gate draws 1.8 A when its output is HIGH and 3.3 µA when its output is LOW. VCC is 5 V and the gate is operated on a 50% duty cycle. What is the average power dissipation (PD)?

A. 2.55 W
B. 1.27 W
C. 12.75 W
D. 5 W

Answer: Option C

Explanation:

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