Programmable Logic Array

Programmable Logic Array (PLA) is a programmable logic device that implements Boolean functions using programmable AND gates and OR gates. It allows any Boolean function in Sum of Products form to be realized. A PLA has three main components: input buffers, a programmable AND gate matrix, and a programmable OR gate matrix. The input buffers reduce loading on input sources. The AND matrix generates product terms from inputs. The number of AND gates equals the number of minterms. The OR matrix performs addition to produce the output functions. The number of OR gates equals the number of functions. PLAs are easier to design and modify than logic gate networks but are slower and use more chip area.