Acronym expansion in programmable logic — “GAL” stands for what? In the context of PAL/GAL devices used for glue logic and small combinational designs, expand the acronym “GAL”.

Difficulty: Easy

Correct Answer: Generic Array Logic

Explanation:


Introduction / Context:
PALs (Programmable Array Logic) and GALs (Generic Array Logic) are classic small programmable logic devices used to replace multiple fixed SSI/MSI gates. Knowing the correct expansion of common acronyms prevents confusion when reading datasheets, app notes, and historical documentation in digital design courses and labs.


Given Data / Assumptions:

  • The term GAL is specific to reprogrammable PAL-like devices.
  • Vendors produced GALs as pin-compatible upgrades to older PALs.
  • “Generic” refers to their general-purpose applicability across many logic functions.


Concept / Approach:
Manufacturers introduced GALs as a more flexible, electrically erasable alternative to one-time programmable PALs. Hence the naming emphasizes “Generic” capability rather than “Programmable” in the acronym itself. GAL devices keep the same basic AND-OR product-term architecture while allowing multiple reprogramming cycles.


Step-by-Step Clarification:

Break down letters: G → Generic, A → Array, L → Logic.Relate to function: a generic programmable array implementing logic via product terms.Confirm usage: textbooks and datasheets consistently define GAL as “Generic Array Logic.”


Verification / Alternative check:
Device markings and family names (e.g., GAL16V8, GAL22V10) in vendor literature explicitly expand to Generic Array Logic. The architectural descriptions match PAL-like devices with reprogrammable technology (e.g., EEPROM/flash) instead of fuse-only arrays.


Why Other Options Are Wrong:

  • General/Giant/Generic Analysis: these phrases are not used in industry nomenclature for GAL devices.
  • Global Arithmetic Logic: conflates with ALU terminology, irrelevant here.


Common Pitfalls:

  • Confusing GAL with FPGA “LUT” terminology; they are different device classes and eras.


Final Answer:
Generic Array Logic

More Questions from Programmable Logic Device

Discussion & Comments

No comments yet. Be the first to comment!
Join Discussion