GAL20V8B-25LJI

Product Overview

Category

The GAL20V8B-25LJI 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 complex logic functions.

Characteristics

• Programmable: The GAL20V8B-25LJI can be programmed to perform various logic functions.
• High-speed operation: It operates at a speed of 25 nanoseconds, making it suitable for time-critical applications.
• Low power consumption: The device is designed to consume minimal power during operation.
• Versatile: It supports a wide range of applications due to its programmability.

Package

The GAL20V8B-25LJI is available in a LCC (Leadless Chip Carrier) package. This package provides a compact and reliable housing for the device.

Essence

The essence of GAL20V8B-25LJI lies in its ability to provide flexible and customizable logic functions in a compact form factor.

Packaging/Quantity

The device is typically packaged in reels or tubes, with each reel or tube containing a specific quantity of GAL20V8B-25LJI chips.

Specifications

• Operating Voltage: 5V
• Speed: 25 nanoseconds
• Logic Cells: 20
• I/O Pins: 8
• Maximum Frequency: 40 MHz
• Programming Technology: Electrically Erasable Programmable Logic Device (EEPROM)

Detailed Pin Configuration

The GAL20V8B-25LJI has a total of 20 pins, which are assigned specific functions as follows:

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. PTG: Product term global input
15. CLK1: Clock input 1
16. CLK2: Clock input 2
17. GND: Ground reference
18. I/O8: Input/output pin 8
19. I/O9: Input/output pin 9
20. VCC: Power supply voltage input

Functional Features

The GAL20V8B-25LJI offers the following functional features:

• Programmable Logic: The device can be programmed to implement various logic functions, including combinational and sequential circuits.
• Macrocell Architecture: It consists of multiple macrocells that can be individually configured to perform specific logic operations.
• Flexible Inputs: The GAL20V8B-25LJI supports a wide range of input options, allowing for versatile circuit design.
• Output Enable Control: The output enable input (OE) allows for easy control of the device's output signals.

Advantages and Disadvantages

Advantages

• Flexibility: The programmability of GAL20V8B-25LJI enables designers to adapt it to different applications easily.
• Compact Size: The LCC package ensures a small footprint, making it suitable for space-constrained designs.
• High-Speed Operation: With a speed of 25 nanoseconds, it can handle time-critical tasks efficiently.

Disadvantages

• Limited Logic Capacity: The GAL20V8B-25LJI has a maximum of 20 logic cells, which may restrict the complexity of designs.
• Lack of In-System Reprogramming: Once programmed, the device cannot be reprogrammed in-system and requires external programming equipment.

Working Principles

The GAL20V8B-25LJI operates based on the principles of programmable logic. It consists of an array of configurable logic cells that can be interconnected to implement desired logic functions. These logic cells are programmed using specific software tools, which generate a configuration file. This file is then used to program the device using an external programmer. Once programmed, the GAL20V8B-25LJI executes the defined logic functions based on the input signals received.

Detailed Application Field Plans

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

1. Digital Circuit Design: It is widely used in the design and implementation of digital circuits, such as multiplexers, decoders, counters, and state machines.
2. Embedded Systems: The device can be utilized in embedded systems for controlling and managing different