Difference between PLA and PAL
PLA and PAL are two types of Programmable Logic Devices (PLD) that are utilized to design combination logic and sequential logic. The main difference between these methods is that the PLA has a programmable array of OR and AND gates, whereas the PAL consists of a programmable array of AND gates but a fixed array of OR gates. PLDs also offer a simple and flexible approach to creating logic circuits, with the ability to increase the number of functions. These all methods are also used in IC.
In this article, you will learn about the difference between the PLA and PAL. But before discussing the differences, you must know about the PLA and PAL.
What is PLA?
PLA is an abbreviation for "Programmable Logic Array". It displays the boolean function in the SOP (Sum of Products) format. The PLA includes NOT, AND, and OR gates that are built into the chip. Each and every input is passed through a NOT gate, which makes every input and its complement available to each AND gate. Each AND gate's output is given to every OR gate. Finally, the OR gate output generates chip output.
PLA allows you to program the connections to AND and OR gates, and PLA is thought to be more expensive and difficult than PAL. The two production methods may be utilized for PLA to boost programming ease. In this method, each connection is created via a fuse at each junction point, where the undesirable links may be eliminated by blowing the fuses. In the latter method, connections are made during the fabrication process with the aid of a suitable mask made for a particular interconnection pattern.
Applications of PLA
There are various applications of PLA. Some main applications of PLA are as follows:
What is PAL?
PAL is an abbreviation for "Programmable Array Logic". It is a PLD (Programmable Logic Device) circuit that functions likewise to the PLA. Unlike PLA, PAL utilizes programmable AND gates but fixed OR gates. It uses two straightforward functions, where the amount of linked AND gates to each OR gate determines the maximum number of product terms that may be formed in the SOP representation of the function. Even though the AND gates are always linked to the OR gates, the resulting product term is not shared with the output functions.
PLDs are designed to incorporate complex boolean logic into a single chip. As a result, unreliable wiring is eliminated, logic design is avoided, and power consumption is minimized.
Benefits of the PAL
There are various benefits of the PAL. Some main benefits of the PAL are as follows:
Key Differences between PLA and PAL
There are various key differences between PLA and PAL. Some of the key differences between PLA and PAL are as follows:
Head-to-head comparison between PLA and PAL
Here, you will learn the head-to-head comparisons between PLA and PAL. The main differences between PLA and PAL are as follows:
PLA and PAL are both the PLD (Programmable Logic Devices), where PLA is more versatile and flexible than PAL. However, programmable array logic may easily create a combinational logic circuit.