GAL20V8B-25QJN

Product Overview

Category

The GAL20V8B-25QJN belongs to the category of programmable logic devices (PLDs).

Use

It is commonly used in digital circuit design and implementation, providing flexibility and reconfigurability.

Characteristics

• Programmable: The GAL20V8B-25QJN can be programmed to perform specific logic functions.
• High-speed operation: It operates at a maximum frequency of 25 MHz.
• Low power consumption: It is designed to minimize power usage.
• Small form factor: The GAL20V8B-25QJN comes in a compact package, making it suitable for space-constrained applications.

Package

The GAL20V8B-25QJN is available in a 24-pin plastic J-leaded chip carrier (PLCC) package.

Essence

The essence of GAL20V8B-25QJN lies in its ability to provide configurable logic functions, enabling designers to implement custom digital circuits without the need for dedicated hardware.

Packaging/Quantity

The GAL20V8B-25QJN is typically sold in reels or tubes, with each reel/tube containing a specified quantity of devices. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Maximum Operating Frequency: 25 MHz
• Number of Inputs: 20
• Number of Outputs: 8
• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The GAL20V8B-25QJN has a total of 24 pins, each serving a specific purpose. The pin configuration is as follows:

1. GND (Ground)
2. I/O0 (Input/Output 0)
3. I/O1 (Input/Output 1)
4. I/O2 (Input/Output 2)
5. I/O3 (Input/Output 3)
6. I/O4 (Input/Output 4)
7. I/O5 (Input/Output 5)
8. I/O6 (Input/Output 6)
9. I/O7 (Input/Output 7)
10. VCC (Supply Voltage)
11. CE1 (Chip Enable 1)
12. CE2 (Chip Enable 2)
13. OE (Output Enable)
14. I/O8 (Input/Output 8)
15. I/O9 (Input/Output 9)
16. I/O10 (Input/Output 10)
17. I/O11 (Input/Output 11)
18. I/O12 (Input/Output 12)
19. I/O13 (Input/Output 13)
20. I/O14 (Input/Output 14)
21. I/O15 (Input/Output 15)
22. I/O16 (Input/Output 16)
23. I/O17 (Input/Output 17)
24. GND (Ground)

Functional Features

The GAL20V8B-25QJN offers the following functional features:

• Programmable Logic: It can be configured to perform various logic functions, such as AND, OR, XOR, and more.
• Macrocell Architecture: The device consists of multiple macrocells that can be individually programmed, providing flexibility in circuit design.
• Output Enable Control: The output enable pin allows for enabling or disabling the outputs as needed.
• High-Speed Operation: With a maximum operating frequency of 25 MHz, it can handle time-critical applications.

Advantages and Disadvantages

Advantages

• Flexibility: The GAL20V8B-25QJN allows designers to create custom logic functions, eliminating the need for dedicated hardware.
• Reconfigurability: The device can be reprogrammed multiple times, enabling iterative design improvements.
• Compact Size: Its small form factor makes it suitable for space-constrained applications.

Disadvantages

• Limited Complexity: The GAL20V8B-25QJN has a limited number of inputs and outputs, which may restrict its use in complex designs.
• Programming Required: Designers need to program the device before use, which adds an extra step to the design process.

Working Principles

The GAL20V8B-25QJN operates based on the principles of programmable logic. It consists of a matrix of configurable logic cells that can be programmed to implement specific logic functions. These logic cells are interconnected through programmable interconnects, allowing designers to create custom digital circuits.

During operation, the device receives input signals, processes them according to the programmed logic, and produces the desired output signals. The programming of the GAL20V8B-25QJN is typically done using specialized software tools that generate the necessary configuration file.

Detailed Application Field Plans