Desirable and/or Required Logic Family Characteristics1.High and low logic levels must be uniquely distinguishable (even in a long cascade)2.Capable of driving many loads (good fanout)3.Fast transition times (but in some cases, not too fast)4.Good noise margins (low error probabilities)5.Small die area6.Low power consumption7.Economical process requirementsReview from Last Time
Desirable and/or Required Logic Family Characteristics8.Minimal noise injection to substrate9.Low leakage currents10.No oscillations during transitions11.Compatible with synthesis tools12.Characteristics do not degrade too much with temperature13.Characteristics do not vary too much with process variationsAre some of these more important than others?Yes ! – must have well-defined logic levels for circuits to even function as logicReview from Last Time
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