GAL16V8QS-20LVI

Programmable Logic Device Pld Overview

The GAL16V8QS-20LVI is a Complex Programmable Logic Device (CPLD) based on Generic Array Logic (GAL) architecture, manufactured by National Semiconductor. It features a PAL-type structure with 16 input pins and 8 output pins, providing 8 macrocells for logic implementation. The device operates at a maximum propagation delay of 20 ns and supports a maximum clock frequency of 50 MHz. It utilizes CMOS technology and is housed in a 28-pin Plastic Leaded Chip Carrier (PLCC) package. The component includes shared input/clock capabilities and register preload functionality, designed for high-speed digital logic applications requiring reprogrammability.

Programmable Logic Device Pld Feature Summary

• PAL-type architecture with 8 macrocells and 16 inputs/8 outputs
• CMOS technology ensuring low power consumption
• 20 ns maximum propagation delay for high-speed operation
• 28-pin PLCC plastic package for surface mount integration

Programmable Logic Device Pld Applications

• Digital signal processing control logic
• Address decoding and memory interfacing
• State machine implementation in industrial controllers
• Replacement for fixed-function gate arrays in legacy systems

Programmable Logic Device Pld Procurement Notes

Verify the manufacturer origin, as National Semiconductor's logic assets were acquired by Texas Instruments. Confirm the specific suffix 'QS' indicates qualified temperature range or commercial grade variants per official datasheets. Ensure the PLCC-28 package matches the target PCB footprint. Check for RoHS compliance status if required for modern manufacturing standards, as older GAL devices may not meet current environmental directives.

Programmable Logic Device Pld Selection Notes

Select this component when a GAL16V8 equivalent is needed with a 20 ns speed grade and PLCC packaging. Compare against GAL16V8A or GAL16V8B variants for speed and voltage differences. Ensure the design tool supports the specific GAL architecture and fuse map. Verify voltage supply requirements, typically 5V for standard GAL devices, against the system power rails.

Programmable Logic Device Pld Part Context

This part belongs to the GAL16V8 family, a widely used programmable logic device series introduced by Lattice Semiconductor and later produced by National Semiconductor and Texas Instruments. The GAL16V8 series replaced earlier PAL devices like the PAL16L8, offering reprogrammability via UV erasure or electrical erasure depending on the variant. The 'QS' suffix often denotes a qualified or specific temperature range version within the product line.

Programmable Logic Device Pld Replacement Considerations

Direct pin-to-pin replacements include GAL16V8-20LVC or GAL16V8A-20LVC from compatible manufacturers. Cross-reference with Lattice GAL16V8Q-20P4C for similar performance. Verify logical equivalence and timing constraints before substitution. Note that programming tools and fuse maps may differ between original Lattice and subsequent National/TI productions.