Device identification in the 74xx family: The 7476 and 74LS76 are both dual J–K flip-flop integrated circuits (same function, different subfamily). Evaluate the statement.
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ACorrect
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BIncorrect
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COnly 7476 is dual; 74LS76 is single
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DOnly 74LS76 is dual; 7476 is monostable
Answer
Correct Answer: Correct
Explanation
Introduction / Context:The 74xx TTL family includes many functionally similar parts across subfamilies (standard, LS, HC, etc.). Recognizing part numbers and functions avoids selection errors and simplifies substitutions.
Given Data / Assumptions:
- 7476: dual J–K flip-flop (master–slave or edge-triggered depending on variant), TTL.
- 74LS76: low-power Schottky (LS) TTL variant of the 7476 with similar pinout/function.
- “Dual” indicates two flip-flops per package.
Concept / Approach:In the 74xx family, base numbers denote function while prefixes/suffixes denote logic subfamily and performance differences. Thus 7476 and 74LS76 share the same logic function: two J–K flip-flops in one IC, but differ in electrical characteristics like speed and power.
Step-by-Step Solution:
Identify base function 76 = dual J–K flip-flops.Confirm LS indicates low-power Schottky implementation.Hence both 7476 and 74LS76 are dual J–K flip-flops.Therefore, the statement is correct.Verification / Alternative check:Pin-compatible datasheets show near-identical logic diagrams and truth tables; only electrical parameters differ.
Why Other Options Are Wrong:
Incorrect / “only one is dual” / “monostable”: These contradict established part catalogs and datasheets.Common Pitfalls:Confusing LS/HC/HCT subfamilies with different functions; overlooking that timing and voltage specs change across subfamilies even when logic function is the same.
Final Answer:Correct