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Which of the following IC logic families has minimum value of fan-out? 
  • a)
    ECL
  • b)
    CMOS
  • c)
    Low power Schottky TTL
  • d)
    Standard TTL 
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Which of the following IC logic families has minimum value of fan-out?...

Standard TTL logic family has the minimum value of fan-out compared to other options.

Standard TTL Logic Family:
- Standard TTL (Transistor-Transistor Logic) is a popular bipolar logic family known for its high speed and reliability.
- It has a fan-out value of around 10, which means that a single output can drive up to 10 inputs without affecting the performance.
- However, due to its higher power consumption and slower speed compared to other logic families like CMOS, it is less commonly used in modern applications.

ECL Logic Family:
- ECL (Emitter-Coupled Logic) is another high-speed logic family known for its superior performance in terms of speed and noise immunity.
- It typically has a higher fan-out value compared to standard TTL, making it suitable for high-speed applications where speed is critical.

CMOS Logic Family:
- CMOS (Complementary Metal-Oxide-Semiconductor) is a widely used logic family known for its low power consumption and high noise immunity.
- It has a higher fan-out value compared to standard TTL, making it suitable for applications where power efficiency is important.

Low Power Schottky TTL Logic Family:
- Low Power Schottky TTL is a variation of the TTL logic family designed to reduce power consumption while maintaining compatibility with standard TTL.
- It has a higher fan-out value compared to standard TTL but lower than CMOS, making it a good choice for applications that require a balance between power efficiency and speed.
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Community Answer
Which of the following IC logic families has minimum value of fan-out?...
​Fan-out:
  • Fan-out is defined as the maximum number of inputs of the same IC family that a gate can drive without falling outside the specified output voltage limits.
  • Higher the fan-out, the higher the current supplying capacity of a gate.
  • For example, a fan-out of 5 indicates that the gate can drive (supply current to) at the most 5 inputs of the same IC family.
  • CMOS has the highest fan out.
  • Standard TTL has the lowest fan out.
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