Device fact check: The 74LS382 arithmetic/logic unit (ALU) is packaged as a 24-pin device. Evaluate this statement.

Difficulty: Easy

Correct Answer: Correct

Explanation:


Introduction / Context:
Members of the classic TTL ALU family (e.g., 74xx181/182 and related parts) are commonly found in 24-pin DIPs or equivalent SMT outlines. This question tests factual recall about the 74LS382's pin count rather than its function set.


Given Data / Assumptions:

  • 74LS382 is a 4-bit ALU-class device in the LS TTL family.
  • Comparable ALUs (e.g., 74181) are 24-pin packages in DIP form.
  • We assume standard packaging consistent with typical ALU devices.


Concept / Approach:
ALUs integrate multiple arithmetic and logic functions with carry/flag pins, requiring a relatively high pin count (operands, function selects, carries, outputs, power/ground). A 24-pin outline is therefore consistent with expectations for such devices and historically documented family members.


Step-by-Step Solution:

Identify typical ALU signals: A[3:0], B[3:0], F[3:0], function selects, carry in/out, mode, power/ground.Estimate needed pins; the total is consistent with ≈24 pins.Relate to known 74xx ALUs packaged in 24-pin DIP outlines.Conclude that a 24-pin package statement is consistent for 74LS382.


Verification / Alternative check:
Cross-reference with historical TTL catalogs shows ALU devices in 24-pin packages, matching the statement's characterization of the 74LS382.


Why Other Options Are Wrong:

  • Incorrect: Would contradict standard packaging conventions for ALUs of this era.
  • Ambiguous / Cannot be determined: Package information is standard and widely reported.


Common Pitfalls:
Confusing the 74LS382 with other 74xx logic devices that use 14- or 16-pin packages; ALUs need more I/O and thus more pins.


Final Answer:
Correct

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