Digital Electronics - Logic Families and Their Characteristics - Discussion

Discussion :: Logic Families and Their Characteristics - General Questions (Q.No.2)


Which of the following logic families has the shortest propagation delay?

[C]. ECL
[D]. 74SXX

Answer: Option C


No answer description available for this question.

Ramki said: (Nov 21, 2011)  
ECL is the Unsaturated logic family and fastest of all the logic families.

Jagmeet said: (Nov 22, 2011)  
ECL has shortest propagation delay because it is the fastest logic as compared to all others.

B V M Prasad said: (Jun 12, 2014)  
Because ecl does not enter into saturation. It always operates in linear region. Hence it takes less time to do transition from one state to anouther state. (ie. , from high to low or viceversa).

Irfan Ali said: (May 20, 2015)  
ECL, mostly Transistors operated in saturation mode, due to this transition delay from one logic state to another is easy (i.e high to low or low to high).

Athira Dileep said: (Jul 21, 2015)  
ECL doesn't go to saturation. So, it has the shortest delay.

Shanmukha said: (Apr 11, 2021)  
Why not 74S? Schottky also not enter into the saturation region.

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