1.
Introduction
2.
What is PLA?
2.1.
Example
3.
Real-world uses of PLA
4.
What is PAL?
4.1.
Example
5.
Real-world Application of PAL
6.
Difference between PLA and PAL
7.
7.1.
What are the advantages of PAL over PLA?
7.2.
What are the disadvantages of PAL over PLA?
7.3.
What is a Programmable Logic Device?
7.4.
Explain the applications of PLA.
8.
Conclusion
Last Updated: Mar 27, 2024

# Difference between Programmable Logic Array and Programming Array Logic

Gaurav Gandhi
0 upvote
Master Python: Predicting weather forecasts
Speaker
Ashwin Goyal
Product Manager @

## Introduction

Hello Ninja, Are you confused about selecting between PAL and PLA? Well, Coding Ninjas got your back. PAL and PLA are both Programmable Logic Devices (PLDs) used in digital circuit design.

This article will discuss the key difference between PLA and PAL, including their architecture, programming methodology, and other aspects.

## What is PLA?

PLA, or Programmable logic array, is a programmable logic device to design digital circuits. It consists of an array of AND gates and an array of OR gates with programmable connections between them. Since both arrays are programmable, it is called a programmable logic array.

PLAs are used in embedded systems, digital signal processing, computer architecture, etc.

### Example

Given the below truth table:

We have 3 inputs as A, B, C and 2 functions as X and Y

Next we find the minimal Sum of Product form for the above truth table.

X=ABâ€™+AC

Y=BC+AC

Therefore, number of programmable AND gates = number of min terms =3

Number of programmable OR gates = number of functions = 2

Hence the PAL diagram for the above two functions are:

Get the tech career you deserve, faster!
Connect with our expert counsellors to understand how to hack your way to success
User rating 4.7/5
1:1 doubt support
95% placement record
Akash Pal
Senior Software Engineer
326% Hike After Job Bootcamp
Himanshu Gusain
Programmer Analyst
32 LPA After Job Bootcamp
After Job
Bootcamp

## Real-world uses of PLA

PLAs are utilized in many real-world applications. They are:

• PLAs are used in digital signal processing to perform filtering, modulation, and demodulation tasks.

• PLAs are used in audio and video processing.

• PLAs are used in computer arithmetic operations like addition, subtraction, multiplication, and division, which are used in microprocessors, digital calculators, etc.

• PLAs are used to implement control logic in microcontrollers, digital controllers, etc.

• PLAs are also used in automotive electronics for engine management, vehicle control, and safety systems. They are typically used in sensor data processing, actuator control, and fault detection.

## What is PAL?

PAL, or Programmable Array Logic, is a type of programmable logic device used to design digital logic circuits. It consists of an array of programmable AND gates followed by fixed OR gates.

PALs are programmed using fuse or anti-fuse technology, where the logic functions are designed by burning and blowing fuses. They are capable of creating a wide range of boolean logic functions.

### Example

Giver functions:

X= AB+AC

Y=Aâ€™B+AC

Z=ABâ€™+BC

Hence the PAL diagram for the above functions are:

## Real-world Application of PAL

Some of the key uses of PAL are as follows:

• PALs are used in embedded systems to implement custom logic functions like decoding, data processing, etc., which find application in automotive electronics, medical devices, industrial automation, etc.

• PALs are used in the telecommunications industry for data routing and signal processing in routers and base stations.

• PALs are also used in aerospace and defence industries to design complex logic functions in radars, missiles, and flight controls.

• PALs are used in test devices to perform tasks like signal conditioning, data acquisition, and instrument control.

## Difference between PLA and PAL

The key differences between PLA and PAL are:

### What are the advantages of PAL over PLA?

Some of the advantages of PAL over PLA consist of lower cost, simpler implementation, and faster operation. PALs are efficient for simple combinatorial logic functions.

### What are the disadvantages of PAL over PLA?

Some of the disadvantages of PAL over PLA are reduced flexibility and the inability to implement complex sequential logic. PALs are also less suitable for intricate logic structures.

### What is a Programmable Logic Device?

A PLD or a Programmable logic device is a digital logic device used to create and design custom digital circuits. They consist of programmable logic elements that can be used to implement logic functions like AND gate, OR gate, and other digital building blocks.

### Explain the applications of PLA.

PLAs are used in digital signal processing to perform filtering, modulation, and demodulation tasks. PLAs are used in audio and video processing. They are used in microprocessors, digital calculators, etc.

## Conclusion

Kudos, Ninja, on making it to the finish line of this article! PAL and PLA are different programmable logic devices used to design digital circuits. This article has covered all the major differences between PLA and PAL.

We hope this blog was useful to you in understanding the key difference between Pla and Pal. Do not stop learning! We recommend you read some of our other Unix articles:

Refer to our Guided Path to upskill yourself in DSACompetitive ProgrammingJavaScriptSystem Design, and many more! If you want to test your competency in coding, you may check out the mock test series and participate in the contests hosted on Coding Ninjas Studio!

But suppose you have just started your learning process and are looking for questions from tech giants like Amazon, Microsoft, Uber, etc. You must look at the problemsinterview experiences, and interview bundles for placement preparations.

We are rooting for you!

Happy Learning!

Live masterclass