Question

Schottky TTL logic family does not have which of the following features?

(a) Good fan-in

(b) Good fan-out

(c) High speed capability

(d) High propagation delay

This question was addressed to me in an online interview.

The origin of the question is Logic Families topic in section Digital Circuits of Analytical Instrumentation

Answer 1

The correct answer is (d) High propagation delay

The explanation is: Schottky TTL circuits have reduced propagation delay than normal TTL circuits. The propagation delay of 10ns is very high for some applications.