GAL20V8B-15LJ

Product Overview

Category

The GAL20V8B-15LJ 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

• The GAL20V8B-15LJ offers high-speed performance with a maximum propagation delay of 15 nanoseconds.
• It has a low power consumption, making it suitable for battery-powered devices.
• This device supports both combinatorial and sequential logic designs.
• It provides non-volatile memory, allowing for reprogramming as needed.

Package

The GAL20V8B-15LJ is available in a PLCC-32 package, which stands for Plastic Leaded Chip Carrier. This package offers good thermal dissipation and ease of handling during assembly.

Essence

The essence of GAL20V8B-15LJ lies in its ability to provide flexible and customizable logic functions through programming, eliminating the need for custom-designed integrated circuits.

Packaging/Quantity

The GAL20V8B-15LJ is typically packaged in reels or tubes, with a quantity of 100 units per reel/tube.

Specifications

• Maximum Propagation Delay: 15 ns
• Operating Voltage: 5V
• Number of Inputs: 20
• Number of Outputs: 8
• Programmable Logic Cells: 8

Detailed Pin Configuration

The GAL20V8B-15LJ has a total of 32 pins, each serving a specific purpose. Here is a detailed pin configuration:

1. VCC - Power supply voltage input
2. GND - Ground reference
3. I/O0 - Input/output pin 0
4. I/O1 - Input/output pin 1
5. I/O2 - Input/output pin 2
6. I/O3 - Input/output pin 3
7. I/O4 - Input/output pin 4
8. I/O5 - Input/output pin 5
9. I/O6 - Input/output pin 6
10. I/O7 - Input/output pin 7
11. CE1 - Chip enable input 1
12. CE2 - Chip enable input 2
13. OE - Output enable input
14. CLK - Clock input
15. TCK - Test clock input
16. TMS - Test mode select input
17. TDI - Test data input
18. TDO - Test data output
19. GND - Ground reference
20. I/O8 - Input/output pin 8
21. I/O9 - Input/output pin 9
22. I/O10 - Input/output pin 10
23. I/O11 - Input/output pin 11
24. I/O12 - Input/output pin 12
25. I/O13 - Input/output pin 13
26. I/O14 - Input/output pin 14
27. I/O15 - Input/output pin 15
28. I/O16 - Input/output pin 16
29. I/O17 - Input/output pin 17
30. I/O18 - Input/output pin 18
31. I/O19 - Input/output pin 19
32. VCC - Power supply voltage input

Functional Features

The GAL20V8B-15LJ offers the following functional features:

1. Programmability: It can be programmed to implement various logic functions, allowing for customization and flexibility in circuit design.
2. Non-volatile Memory: The programmed configuration remains even after power is removed, eliminating the need for reprogramming on every power-up.
3. High-Speed Performance: With a maximum propagation delay of 15 ns, it can handle time-critical applications efficiently.
4. Low Power Consumption: The GAL20V8B-15LJ is designed to consume minimal power, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages

• Flexibility in circuit design due to programmability
• Non-volatile memory ensures configuration persistence
• High-speed performance for time-critical applications
• Low power consumption for energy-efficient designs

Disadvantages

• Limited number of inputs and outputs (20 inputs, 8 outputs)
• Programming process requires specialized tools and knowledge
• Not suitable for complex logic designs that require a large number of inputs/outputs

Working Principles

The GAL20V8B-15LJ operates based on the principles of programmable logic. It consists of configurable logic cells that can be programmed to implement specific logic functions. These logic cells are interconnected through a network of programmable interconnects, allowing for the creation of custom logic circuits.

During programming, the desired logic function is defined using a Hardware Description Language (HDL) or a schematic editor