CMOS package types in practice Which packaging options are commonly available for CMOS logic ICs in standard product lines?

Difficulty: Easy

Correct Answer: DIP and SOIC configurations

Explanation:


Introduction / Context:
Integrated circuit packaging affects assembly method, prototyping approach, and thermal behavior. CMOS logic families have been produced for decades in both through-hole and surface-mount forms to suit diverse manufacturing flows.


Given Data / Assumptions:

  • DIP (Dual In-line Package) is through-hole; SOIC (Small-Outline IC) is surface-mount.
  • We are considering common catalog offerings for CMOS logic.
  • Specialized packages (TSSOP, QFN) also exist but are outside this question.


Concept / Approach:
Standard CMOS logic devices (e.g., 74HC/74HCT, CD4000 series) are widely available in DIP for breadboarding and education, and in SOIC for modern automated assembly. Thus, both packaging styles are typical and expected in inventory.


Step-by-Step Reasoning:
Check historical availability: CD4000 and 74HC families offered in DIP.Check SMD prevalence: SOIC versions of the same logic functions are mainstream.Therefore, the correct choice is “DIP and SOIC configurations.”


Verification / Alternative check:
Vendor parametric searches routinely list both DIP and SOIC variants for common logic gates and flip-flops, confirming dual availability.


Why Other Options Are Wrong:

  • DIP-only or SOIC-only artificially restricts what is widely available.
  • “Neither” contradicts decades of CMOS packaging practice.


Common Pitfalls:

  • Assuming through-hole is obsolete; while less common in mass production, DIP remains common in labs and education.
  • Ignoring that many pin-compatible parts exist across multiple packages.


Final Answer:
DIP and SOIC configurations

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