Question
Download Solution PDFWhich of the following statements is incorrect?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe most important parameters for evaluating and comparing logic families are:
- Power dissipation
- Propagation delay
- Noise margin
- Fan-out (loading)
General comparison of three commonly available logic families is explained in the following table:
|
Logic Family |
Advantages |
Disadvantages |
|
CMOS |
Lowest power consumption Used in all microcomputer chips today. Most common logic family. |
Easily damaged by static discharge and voltage spikes. |
|
TTL |
Earliest developed. Most rugged. Least susceptible to electrical damage. |
Consumes more power than CMOS – not suitable for battery-operated devices. |
|
ECL |
Fastest available logic family |
Consumes more power than CMOS. It requires extreme care in the wiring. |
∴ Option 1 is incorrect because the power dissipation in TTL is high and hence CMOS having less waste power as compared to NMOS logic and TTL can be used in highly integrated circuits.
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