GAL20V8B-25LJ

Product Overview

Category

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

Use

It is commonly used in digital circuit design and implementation.

Characteristics

• Programmable: The GAL20V8B-25LJ can be programmed to perform specific logic functions.
• Versatile: It can be used in a wide range of applications due to its programmability.
• High-speed operation: The device operates at a speed of 25 nanoseconds (ns).
• Low power consumption: It consumes minimal power during operation.

Package

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

Essence

The essence of GAL20V8B-25LJ lies in its ability to provide flexible and customizable logic functions for various digital circuit designs.

Packaging/Quantity

The device is typically packaged in reels or tubes, with each containing a specified quantity of GAL20V8B-25LJ chips.

Specifications

• Operating Voltage: 5V
• Maximum Operating Frequency: 40 MHz
• Number of Inputs: 20
• Number of Outputs: 8
• Logic Cells: 20
• I/O Pins: 16
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. VCC
2. GND
3. I/O0
4. I/O1
5. I/O2
6. I/O3
7. I/O4
8. I/O5
9. I/O6
10. I/O7
11. I/O8
12. I/O9
13. I/O10
14. I/O11
15. I/O12
16. I/O13
17. I/O14
18. I/O15
19. OE (Output Enable)
20. CE (Chip Enable)

Functional Features

• Programmable Logic: The GAL20V8B-25LJ can be programmed to implement various logic functions, such as AND, OR, XOR, and more.
• Output Enable Control: The OE pin allows the user to enable or disable the outputs of the device.
• Chip Enable Control: The CE pin enables or disables the entire chip, conserving power when not in use.

Advantages and Disadvantages

Advantages

• Flexibility: The GAL20V8B-25LJ offers flexibility in designing custom logic functions.
• Cost-effective: It eliminates the need for multiple discrete logic components, reducing overall system cost.
• Time-saving: Programming the device saves time compared to designing and fabricating custom logic circuits.

Disadvantages

• Limited Complexity: The GAL20V8B-25LJ has a limited number of logic cells, which restricts the complexity of designs it can accommodate.
• Non-volatile: The device is not non-volatile, meaning that the programmed logic configuration is lost when power is removed.

Working Principles

The GAL20V8B-25LJ utilizes a combination of programmable AND and OR gates to implement custom logic functions. The device is programmed using specialized software that generates a binary file containing the desired logic configuration. This file is then loaded onto the GAL20V8B-25LJ using a programming tool, which sets the internal connections of the device according to the specified logic function.

Detailed Application Field Plans

The GAL20V8B-25LJ finds applications in various fields, including: 1. Digital circuit design and prototyping 2. Embedded systems 3. Industrial automation 4. Communication systems 5. Automotive electronics

Detailed and Complete Alternative Models

1. GAL16V8B-25LJ: Similar to GAL20V8B-25LJ but with 16 logic cells instead of 20.
2. GAL22V10B-15LJ: Offers higher logic capacity with 22 logic cells and operates at a slower speed of 15 ns.
3. GAL18V10B-15LJ: Combines intermediate logic capacity (18 cells) with a moderate operating speed of 15 ns.

These alternative models provide varying levels of logic capacity and performance, allowing designers to choose the most suitable option for their specific requirements.

In conclusion, the GAL20V8B-25LJ is a versatile programmable logic device that offers flexibility, cost-effectiveness, and time-saving benefits in digital circuit design. Its ability to implement custom logic functions makes it a valuable component in various applications across different industries.