GAL architecture knowledge check The GAL16V8 programmable logic device is claimed to have 32 input variables available to its logic. Judge this statement with respect to actual GAL16V8 capabilities.

Introduction / Context:
Generic Array Logic (GAL) devices like the GAL16V8 are classic SPLDs used to implement sum-of-products logic with configurable I/O macrocells. Knowing the approximate number of available inputs, macrocells, and product-term structures helps you quickly spot exaggerated or incorrect specifications.

Given Data / Assumptions:

• Device: GAL16V8 (16 inputs, 8 macrocells conceptually).
• Claim: It has 32 input variables.
• We evaluate the claim against typical architectural limits.

Concept / Approach:
The “16V8” naming indicates a 20-pin device with an AND array that can accept up to 16 inputs (after accounting for pins used as inputs or feedback from macrocells) and 8 output macrocells. Although each macrocell can draw from a rich set of product terms and can use feedback (including output feedback), the raw number of independent external input variables is not 32. Datasheets show limits closer to 16 primary inputs plus macrocell feedback—still far short of 32 independent variables.

Step-by-Step Solution:
Recall the device family naming convention: 16 inputs, 8 outputs (configurations vary).Recognize that macrocell feedback adds usable signals but not 32 distinct external inputs.Conclude the statement exaggerates the input capacity; mark it incorrect.

Verification / Alternative check:
Review a GAL16V8 datasheet to see pinout and the programmable AND array structure. The total user-accessible input variables do not reach 32.

Why Other Options Are Wrong:
“Correct” contradicts datasheet constraints. Mode (registered vs. combinational) and speed grade do not suddenly double the input variable count, so the conditional options are misleading.

Common Pitfalls:
Confusing the number of input pins with the number of signals that can feed the AND array through feedback; interpreting “variables” as “product terms.”

Final Answer:
Incorrect