Complex Programmable Logic Devices (CPLDs) combine the features of programmable logic devices (PLDs) and programmable interconnects to implement complex digital logic functions. CPLDs consist of an array of logic blocks, input/output pins, and programmable routing resources, allowing designers to create custom digital circuits by programming the logic functions and interconnections. They are used in a wide range of applications such as embedded systems, telecommunications equipment, industrial automation, and consumer electronics. The pricing of CPLDs varies based on factors such as the number of logic cells or macrocells, the amount of programmable routing resources, speed grade, package type and brand. Higher-density CPLDs with more logic resources, faster operating speeds, and advanced features such as on-chip memory or analog interfaces tend to have higher price points. When purchasing CPLDs, consider the specific requirements of your digital logic design. Determine the number of logic elements or macrocells needed to implement your desired logic functions and consider the available programmable routing resources for interconnecting logic blocks. Evaluate factors such as operating speed, power consumption, voltage requirements, and temperature range to ensure compatibility with your system requirements. Choose a CPLD with sufficient I/O pins and interface options for connecting to other components in your design.