A Complex Programmable Logic Device (CPLD) is an integrated circuit that can be programmed to perform specific logic functions. It consists of multiple programmable logic blocks and interconnects, allowing designers to create custom digital circuits. CPLDs are often used in applications where flexibility and quick prototyping are essential. Unlike traditional fixed-function devices, CPLDs can be reconfigured to adapt to changing requirements. They are commonly used in embedded systems, telecommunications, and consumer electronics. Their ability to handle complex logic operations makes them a valuable tool for engineers in various fields of electronics design.