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Which of the following statement is true for Programmable Logic array (PLA) ?

Which of the following statement is true for Programmable Logic array (PLA) ? Correct Answer Fused programmable AND array and Fused Programmable OR array

PLD’s (Programmable Logic Devices) are the circuits that contain an array of AND gates and another array of OR gates. There are three kinds of PLD’s depending upon the type of array, i.e.

  • Programmable Read-Only Memory
  • Programmable Array Logic
  • Programmable Logic Array (PLA)

  • ROM is a memory device that stores the binary information permanently.

Programmable Logic Arrays (PLA’s) implement two-level combination logic in sum-of-products (SOP) form.

PLA’s are Programmable AND array followed by Programmable OR array as shown:

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PAL: Programmable AND array followed by fixed OR array

PROM:

  • It is known as programmable read-only memory
  • It includes both AND array & OR array
  • Out of these two arrays AND array is fixed and OR array is programmable.

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