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Motorola has offered MECL circuits in ______ logic families.(a) 3(b) 4(c) 5(d) 6This question was addressed to me during an interview for a job.The above asked question is from Compatibility or Interfacing in division Logic Families of Digital Circuits

Answer»

Correct answer is (c) 5

To explain I would SAY: Motorola has offered MECL circuits in five logic FAMILIES: MECL I, MECL II, MECL III, MECL 10000 (MECL 10K) and MECL 10H000 (MECL 10KH). The full form of MECL is Motorola emitter coupled logic. ECL is a high speed BJT. It USES BJT differential amplifier with single INPUT and restricted current to avoid the transistor going into saturation and thus turning off operation.



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