GAL20V8QS-25LVC

Programmable Logic Device Pld Overview

The National Semiconductor GAL20V8QS-25LVC is a Complex Programmable Logic Device (CPLD) based on CMOS technology, belonging to the GAL20 family. It features a PAL-type architecture with 20 input lines and 8 output lines, organized into 8 macrocells. The device supports a maximum clock frequency of 37 MHz with a 25 ns propagation delay. It utilizes a 28-pin Plastic Leaded Chip Carrier (PLCC) package. Key capabilities include shared input/clock functionality and register preload options for flexible logic implementation.

Programmable Logic Device Pld Feature Summary

• CMOS GAL20 architecture with 20 inputs and 8 outputs
• 25 ns propagation delay supporting up to 37 MHz operation
• 8 macrocells with shared input/clock and register preload
• 28-pin PLCC plastic package

Programmable Logic Device Pld Applications

• Digital logic replacement in industrial control systems
• Address decoding and memory interface logic
• State machine implementation in embedded controllers

Programmable Logic Device Pld Procurement Notes

Verify the manufacturer origin as National Semiconductor or Texas Instruments, noting that TI acquired NS's logic business. Confirm the specific suffix 'LVC' corresponds to the correct voltage range and package variant against official datasheets. Ensure RoHS compliance status matches project requirements, as older NS stock may not be compliant.

Programmable Logic Device Pld Selection Notes

Select this component when a 20-input, 8-output PAL-compatible solution is required with 25 ns speed. Compare against GAL20V8-25 variants if leaded chip carrier packaging is mandatory. Verify voltage supply compatibility and ensure the 8-macrocell density meets the design complexity without requiring higher-density CPLDs.

Programmable Logic Device Pld Part Context

This part belongs to the GAL20 series of programmable logic devices originally developed by National Semiconductor. These devices were widely used for replacing discrete logic gates. Following the acquisition of National Semiconductor's logic division by Texas Instruments, production and documentation responsibilities transitioned to TI.

Programmable Logic Device Pld Replacement Considerations

Direct pin-compatible replacements include the GAL20V8-25LVC from Texas Instruments. Other compatible parts within the same family offer similar I/O counts but may vary in speed grades or package types.