Introduction / Context:
Many packages contain multiple identical elements, such as quad op-amps or quad NAND gates. Presenting each element as its own symbol improves readability and routing logic by placing each function where it is used in the circuit.
Given Data / Assumptions:
- The package comprises multiple identical or related elements.
- Each element can be instantiated as A, B, C, D units.
- Pin numbers and power pins are managed appropriately.
Concept / Approach:
Splitting multi-element parts allows logical locality: each amplifier stage appears alongside its surrounding passives. Power pins may be shown once in a separate power symbol to reduce clutter. CAD tools maintain the package linkage to ensure the PCB uses a single physical part.
Step-by-Step Solution:
Instantiate separate unit symbols (e.g., U1A, U1B, U1C, U1D).Place each unit near its associated circuitry for clarity.Show power pins either on each unit or in a dedicated power unit per library conventions.Validate the netlist ensures all units map to the same footprint.
Verification / Alternative check:
Run an electrical rules check to confirm all units in the package are used and correctly powered.
Why Other Options Are Wrong:
Incorrect: Keeping the entire multi-element package in one block often reduces clarity.Allowed only for digital ICs / Valid only on single-sheet: The practice is common across analog and digital, single- or multi-sheet projects.
Common Pitfalls:
Forgetting to connect power pins when shown separately.Reusing the same unit designator twice, causing netlist conflicts.
Final Answer:
Correct
Discussion & Comments