GAL20V8QS-25QNI: National Semiconductor's Advanced 25ns Programmable Logic Device (PLD)

Product Overview

The GAL20V8QS-25QNI from National Semiconductor represents a cutting-edge solution in the realm of high-speed programmable logic devices. As part of the renowned GAL family, this 25ns PLD offers engineers unparalleled flexibility in digital system design, combining the speed of traditional PAL devices with the configurability of modern CPLDs.

Technical Specifications

Core Features

• Architecture: PAL-type electrically erasable (EE) programmable logic
• Speed Grade: 25ns maximum propagation delay
• Technology: Advanced CMOS process for low-power operation
• Programmability: In-system programmable (ISP) capability

Performance Characteristics

• Operating Frequency: Up to 40MHz system clock
• Power Consumption: Optimized for low-power applications
• Temperature Range: Industrial-grade operation (-40 C to +85 C)

Detailed Functional Description

The GAL20V8QS-25QNI features a sophisticated architecture that includes:

• 20 inputs with programmable polarity control
• 8 output logic macrocells with configurable feedback
• Programmable AND/OR logic array
• Output enable control for each macrocell
• Security fuse to prevent unauthorized copying

Design Advantages

System Integration Benefits

This PLD offers significant advantages for system designers:

• Space Efficiency: Replaces multiple standard logic ICs
• Design Flexibility: Allows late-stage design changes
• Time-to-Market: Faster prototyping compared to ASICs
• Cost Reduction: Eliminates need for custom silicon

Application Scenarios

Industrial Applications

• Machine control logic implementation
• Process monitoring interfaces
• Equipment status decoding

Telecommunications Uses

• Protocol conversion logic
• Signal conditioning circuits
• Interface bridging functions

Consumer Electronics

• Appliance control systems
• Display interface logic
• Input signal processing

Development Support

National Semiconductor provides comprehensive development tools for the GAL20V8QS-25QNI:

• Advanced programming software
• Hardware programmers and debuggers
• Reference designs and application notes
• Simulation models for major EDA tools

Purchasing Information

The GAL20V8QS-25QNI is available through authorized distributors worldwide. Package options include:

• 28-pin PLCC (Plastic Leaded Chip Carrier)
• 28-pin DIP (Dual In-line Package)
• 28-pin SOIC (Small Outline IC)

Why Choose This PLD?

The GAL20V8QS-25QNI stands out for its:

• Proven reliability in demanding applications
• Backward compatibility with previous GAL devices
• Excellent technical support from National Semiconductor
• Cost-effective solution for medium-complexity designs

Technical Support Resources

National Semiconductor offers:

• 24/7 online documentation access
• Application engineering support
• Design review services
• Failure analysis for quality assurance

Future-Proof Your Designs

With its robust architecture and National Semiconductor's commitment to long-term product support, the GAL20V8QS-25QNI ensures your designs remain viable for years to come. The device's reprogrammability allows for field updates and feature enhancements without hardware changes.

For detailed datasheets, application notes, or to request samples, visit our product page or contact our sales team today.