TTL logic families comparison What functional difference distinguishes the 7400 and 7411 TTL integrated circuits?
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A7400 has two four-input NAND gates; 7411 has three three-input AND gates
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B7400 has four two-input NAND gates; 7411 has three three-input AND gates
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C7400 has two four-input AND gates; 7411 has three three-input NAND gates
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D7400 has four two-input AND gates; 7411 has three three-input NAND gates
Answer
Correct Answer: 7400 has four two-input NAND gates; 7411 has three three-input AND gates
Explanation
Introduction / Context:Classic 74xx TTL parts are often identified by function numbers. Remembering core devices like 7400 and 7411 speeds up schematic reading and parts selection.
Given Data / Assumptions:
- Series: 74xx TTL.
- Part 7400: standard building block.
- Part 7411: three-input gate device.
Concept / Approach:The 7400 contains four independent 2-input NAND gates in one package. The 7411 contains three independent 3-input AND gates. This difference affects logic design density and required gate count.
Step-by-Step Solution:Identify 7400: quad 2-input NAND.Identify 7411: triple 3-input AND.Choose the option that matches both facts.
Verification / Alternative check:Standard pinout tables and TTL datasheets list these functions; many educational kits label them accordingly.
Why Other Options Are Wrong:Options with four-input NANDs or ANDs do not match 7400/7411 datasheet specs.Options that swap AND/NAND are incorrect functions.
Common Pitfalls:Confusing 7411 (3-input AND) with 7410 (3-input NAND). The final digit matters.
Final Answer:7400 has four two-input NAND gates; 7411 has three three-input AND gates