Integrated-Circuit Logic Families Questions and Answers
Integrated-Circuit Logic Families questions with answers form a vital segment in digital electronics and programming interview preparation. This topic focuses on TTL, CMOS, and ECL families — the foundation of modern logic circuits. These questions are commonly asked in GATE, DRDO, and ECE placement interviews to test understanding of circuit performance, power consumption, and speed. By studying IC logic family MCQs with explanations, students can master logic gate compatibility and voltage levels effectively. Download digital electronics PDFs and practice IC logic questions to enhance exam readiness and technical accuracy.
Integrated-Circuit Logic Families
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49 questions
21. Generally, the voltage measured at an unused TTL input would typically be measured between:
- 1.4 to 1.8 V.
- 0 to 5 V.
- 0 to 1.8 V.
- 0.8 to 5 V.
22. The IEEE/ANSI notation of an internal underlined diamond denotes:
- totem-pole outputs.
- open-collector outputs.
- quadrature amplifiers.
- tristate buffers.
23. The bipolar TTL logic family that was developed to increase switching speed by preventing transistor saturation is:
- emitter-coupled logic (ECL).
- current-mode logic (CML).
- transistor-transistor logic (TTL).
- emitter-coupled logic (ECL) and transistor-transistor logic (TTL).
24. The major advantage of TTL logic circuits over CMOS is lower propagation delay.
- TRUE
- FALSE
25. The data sheet for the 74 series of TTL ICs shows that Vcc has a range of 4.5 V to 5.5 V.
- TRUE
- FALSE
26. The major advantage of CMOS logic circuits over TTL is very low power consumption.
- TRUE
- FALSE
27. The dc noise margins calculated using the proper values from a standard TTL data sheet are the worst-case margins. The typical dc noise margins are usually somewhat higher.
- TRUE
- FALSE
28. The principal advantage of MOS ICs over TTL ICs is their fast operating speed.
- TRUE
- FALSE
29. The CMOS series that is pin-compatible with the TTL family is the 4000 series.
- TRUE
- FALSE
30. The TTL HIGH level source current is higher than the LOW level sinking current.
- TRUE
- FALSE