GAL20V8B-25LJN

Product Overview

Category

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

Use

It is commonly used in digital circuit design and implementation, specifically for applications that require programmable logic functions.

Characteristics

• High-speed operation
• Low power consumption
• Small form factor
• Easy programmability
• Wide operating voltage range

Package

The GAL20V8B-25LJN is available in a 24-pin PLCC (Plastic Leaded Chip Carrier) package.

Essence

This device is an advanced programmable logic device that allows users to implement custom logic functions using a combination of AND, OR, and XOR gates.

Packaging/Quantity

The GAL20V8B-25LJN is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Operating Voltage: 4.5V to 5.5V
• Speed Grade: 25 ns
• Number of Inputs: 20
• Number of Outputs: 8
• Maximum Operating Frequency: 40 MHz
• Programmable Macrocell: Yes
• JTAG Boundary Scan: Yes

Detailed Pin Configuration

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 - Power Supply
11. I/O8 - Input/Output 8
12. I/O9 - Input/Output 9
13. I/O10 - Input/Output 10
14. I/O11 - Input/Output 11
15. I/O12 - Input/Output 12
16. I/O13 - Input/Output 13
17. I/O14 - Input/Output 14
18. I/O15 - Input/Output 15
19. I/O16 - Input/Output 16
20. I/O17 - Input/Output 17
21. I/O18 - Input/Output 18
22. I/O19 - Input/Output 19
23. OE - Output Enable
24. CE - Chip Enable

Functional Features

• Programmable AND/OR array for implementing custom logic functions
• Programmable macrocell for additional functionality
• JTAG boundary scan for testing and debugging purposes
• High-speed operation allows for efficient data processing
• Low power consumption makes it suitable for battery-powered devices

Advantages and Disadvantages

Advantages

• Flexibility: The GAL20V8B-25LJN can be programmed to perform a wide range of logic functions, making it highly versatile.
• Cost-effective: By using a programmable logic device, designers can avoid the need for custom-designed integrated circuits, reducing development costs.
• Time-saving: The GAL20V8B-25LJN eliminates the need for manual wiring and soldering of discrete components, saving time during circuit design and assembly.

Disadvantages

• Limited complexity: While the GAL20V8B-25LJN is capable of implementing various logic functions, its capacity is limited compared to more advanced programmable logic devices.
• Programming required: Users need to program the device before use, which may require additional tools and expertise.

Working Principles

The GAL20V8B-25LJN operates based on the principles of programmable logic. It consists of an array of programmable AND/OR gates that can be configured to implement custom logic functions. The device is programmed using specialized software, which generates a binary file containing the desired logic configuration. This file is then loaded into the GAL20V8B-25LJN using a programming tool, enabling it to perform the specified logic operations.

Detailed Application Field Plans

The GAL20V8B-25LJN finds applications in various fields, including:

1. Digital circuit design: It is widely used in the development of digital systems, such as microcontrollers, FPGAs, and embedded systems.
2. Communication systems: The GAL20V8B-25LJN can be utilized in the design of communication protocols, data encoding/decoding, and signal processing.
3. Industrial automation: It plays a crucial role in controlling and monitoring industrial processes, including robotics, motor control, and sensor interfacing.
4. Automotive electronics: The GAL20V8B-25LJN is