GAL20V8B-15LPN

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Embedded - CPLDs (Complex Programmable Logic Devices) are a type of digital integrated circuit that provides compile-time programmability of most of the logic, interconnection and memory options within the device. GAL20V8B-15LPN, part of the 20V8 device family, is a Complex Programmable Logic Device (CPLD) commonly used in embedded applications. In this article, we will look at GAL20V8B’s application fields and working principle.

Application Fields

GAL20V8B-15LPN CPLDs are used in a variety of embedded application fields. It’s designed specifically for telecom and networking applications, providing telecommunications-grade system reliability in a low pin-count, high-density PLD. It’s ideal for applications such as network cards, bridges, routers, firewalls and set-top boxes.

This device is also reliable in consumer and industrial applications, such as printer controllers, consumer electronics and power supplies. With its 40 macro-cells and a high number of logic functions, the GAL20V8B also excels in service-oriented applications, including process control, motor control, avionics, automotive and safety applications.

Working Principle

GAL20V8B’s primary purpose is to provide the necessary computing power to coordinate the operation of the application it is embedded in. It is a CMOS device based on a 0.6μm process and dissipates ultra-low static power. The device acts as a bridge between the system hardware and the application-specific logic required for the application.

The GAL20V8B’s working principle is based on a two-level static latch-based logic. It features a 5V-tolerant TTL-compatible I/O structure, which allows for level shifting from higher voltage levels to 5V levels. It has a large number of input and output pins, with up to 150 usable inputs and outputs. The device also includes a ROM that stores user-defined code sequences. This code sequences can be loaded into the user\'s device to control its behavior.

The GAL20V8B CPLD fulfills the requirements of the high-density embedded applications by providing an array of logic functions, including logic functions such as AND, OR, NAND, NOR and XOR, which are linked together using static latches. It also supports various timing functions and clock-related operations. Moreover, its programming flexibility allows users to select and apply optimal solutions, depending on their requirements.

The GAL20V8B is designed to offer reliable operation in worse-case conditions and is hence very suitable for critical applications requiring high accuracy and superior stability.

Conclusion

GAL20V8B-15LPN is a Complex Programmable Logic Device (CPLD) commonly used in embedded applications. It’s primarily used in telecom and networking applications, but can also be used in consumer and industrial applications, such as printer controllers, consumer electronics and power supplies. Its operation is based on a two-level static latch-based logic, with up to 150 input and output pins and a user-defined code sequence stored in a ROM. This device is suitable for applications requiring high accuracy and superior stability.

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