Input-level abbreviations in logic families: The standard abbreviation for the required HIGH input voltage level is VIH. Assess the correctness of this notation.

Introduction / Context:
Datasheets use standardized abbreviations to define logic thresholds and drive levels. Recognizing these acronyms is essential for interfacing different logic families safely and for computing noise margins.

Given Data / Assumptions:

• VIH denotes the minimum input voltage guaranteed to be recognized as a logic HIGH.
• VIL denotes the maximum input voltage guaranteed to be recognized as a logic LOW.
• VOH and VOL are the guaranteed output HIGH and LOW levels at specified load currents.

Concept / Approach:
These four parameters—VIH, VIL, VOH, VOL—form the basis of noise margin calculations. Identifying VIH correctly ensures that the driving stage’s VOH meets or exceeds the receiving stage’s VIH under worst-case conditions.

Step-by-Step Solution:

Verification / Alternative check:
Any standard logic family datasheet glossary confirms the VIH/VIL conventions alongside VOH/VOL.

Why Other Options Are Wrong:

Common Pitfalls:
Confusing input thresholds with output levels; forgetting to include temperature and load conditions when checking compliance.

Final Answer:
Correct