Which of the following is the fastest logic family?
2016
Which of the following is the fastest logic family?
- A.
Emitter-Coupled Logic (ECL)
- B.
Transistor-Transistor Logic (TTL)
- C.
Diode-Transistor Logic (DTL)
- D.
Resistor-Transistor Logic (RTL)
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Correct answer: A
Emitter-Coupled Logic (ECL) is the fastest among the given logic families. In ECL, transistors are kept out of saturation, so storage-time delay is avoided and propagation delay is reduced. TTL, DTL, and RTL are slower in comparison. Therefore, the correct answer is Emitter-Coupled Logic (ECL).
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