Difficulty: Easy
Correct Answer: 3, 6, 8, and 11
Explanation:
Introduction / Context:
Recognizing standard TTL/CMOS logic IC pinouts is practical for wiring, testing, and debugging. The 7432 contains four independent 2-input OR gates. Each gate has two input pins and one output pin. Correctly identifying outputs avoids wiring errors and simplifies troubleshooting with a logic probe.
Given Data / Assumptions:
Concept / Approach:
In many 74xx quad-gate devices, outputs are located at positions 3, 6, 8, and 11 (mirrored across the package centerline), while inputs are adjacent pins. This consistency helps memorization across related parts like 7408 (AND), 7432 (OR), and 7400 (NAND) with similar output placements.
Step-by-Step Solution:
Verification / Alternative check:
Cross-compare with 7408 and 7400 families: these often share output positions 3, 6, 8, 11, reinforcing the memory pattern for quad logic ICs in DIP-14 packages.
Why Other Options Are Wrong:
Common Pitfalls:
Swapping inputs and outputs, or confusing pinouts across different packages or manufacturers. Always confirm with the specific datasheet when in doubt.
Final Answer:
3, 6, 8, and 11
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