Standard Logic Devices (SLD) Questions

• Why CMOS logic is favored in modern digital design Which option best captures the primary advantages that make CMOS logic a strong all-around choice?
• CMOS low-power mechanism CMOS logic achieves low static power consumption primarily because its gates are built from:
• Definition of fanout in TTL logic In TTL logic families, the specification “ten TTL loads per TTL driver” refers to which parameter?
• IC packaging and PCB space efficiency Which integrated-circuit package style generally makes the most efficient use of printed circuit board (PCB) area?
• Key characteristics of emitter-coupled logic (ECL) Which statement best summarizes the typical features of ECL logic families?
• Standard TTL noise margin For standard TTL logic operating at 5 V, what is the typical dc noise margin (per level)?
• Interfacing logic families with different supply voltages To connect ICs that operate at different VCC levels, which solution is appropriate?
• Package identification by pin rows An integrated circuit package that has two parallel rows of connection pins is commonly called a:
• TTL output stage design – totem-pole configuration: In transistor–transistor logic (TTL) with a totem-pole output stage, how are the two output transistors intentionally operated to prevent shoot-through and minimize power dissipation while delivering fast edges to the load?
• Interfacing digital logic families: Which electrical quantities must be mutually compatible when connecting the output of one logic family to the input of another (e.g., TTL to CMOS)?
• Digital buffer characteristics: For a device used purely as a buffer/driver between logic stages, which input/output impedance combination is most desirable to avoid loading the source while strongly driving the next stage?
• Logic input thresholds (TTL example): For standard 5 V TTL-compatible inputs, what is the guaranteed range for a valid logic LOW level (VIL)?
• Digital timing parameter: The interval required for a logic gate's output to settle to a new logic level after an input change is called what?
• Logic family characteristics — ECL: Evaluate the statement: “Emitter-Coupled Logic (ECL) gates are known for very high frequency capability and small output voltage swing.”
• Series identification — 5400 vs. 7400 TTL families: Judge the claim: “The 5400 TTL series logic chips are manufactured to military specifications.”
• Power consumption comparison — CMOS vs. TTL: Evaluate the statement: “CMOS logic circuits generally consume less power than TTL circuits.” Consider quiescent conditions and typical operating regimes.
• CMOS–TTL interconnection limits: Because CMOS logic has extremely low static power consumption, can an arbitrary number of CMOS and TTL gates be interconnected without any fan-out limits or special interface considerations?
• Schottky TTL behavior: Do Schottky TTL logic gates reduce saturation delay by preventing the transistors from entering deep saturation (thereby speeding up turn-off)?
• Output stage comparison: Do TTL totem-pole output stages typically switch faster than open-collector outputs that rely on external pull-up resistors?
• Buffer/driver meaning: Does the term “buffer/driver” imply the ability to deliver relatively high output current to heavier loads (rather than only low current to light loads)?