PALCE20V8Q-20JI/4

Overview

The PALCE20V8Q-20JI/4 is a Programmable Logic Device (PLD) IC manufactured by Lattice Semiconductor Corporation. It features 8 macrocells and utilizes electrically erasable CMOS technology for reconfigurable logic. The device is housed in a 28-pin PLCC package with dimensions of 11.51x11.51 mm. It offers high-speed performance with a propagation delay of 20 ns, ensuring efficient signal processing. The architecture is fully compatible with GAL20V8 standards and directly replaces PAL20R8 series devices. Outputs are individually programmable as registered or combinatorial, supporting PCI compliance and automatic register reset on power-up.

Feature Summary

• Electrically erasable CMOS technology enables full reconfigurability and testability
• Pin and function compatibility with standard PAL 20V8 devices allows direct replacement
• Outputs are individually configurable as registered or combinatorial logic
• Supports automatic register reset on power-up for reliable initialization

Applications

• Direct replacement for GAL20V8 and PAL20R8 series components
• PCI compliant logic interface designs
• Combinatorial and registered logic implementation
• General-purpose programmable array logic applications

Procurement Notes

Verify the specific suffix codes to ensure correct package type and speed grade alignment with design requirements. Confirm that the electrically erasable nature matches the programming infrastructure available. Check for obsolescence notifications regarding devices fabricated in older AMD fab processes, as this may impact long-term availability. Ensure the 28-pin PLCC footprint matches the PCB layout constraints before finalizing procurement decisions.

Selection Notes

Select this component when a drop-in replacement for legacy GAL20V8 or PAL20R8 devices is required without redesigning the hardware. The electrically erasable feature supports iterative design changes during development. Consider the 20 ns speed grade if timing constraints allow for slower switching than the -5 or -7 variants. The 28-pin PLCC package is suitable for through-hole or surface-mount applications requiring a compact form factor compared to DIP options.

Part Context

This part belongs to the PALCE20V8 family, which represents advanced PAL devices built on low-power, high-speed CMOS technology. The family provides universal device architecture with macrocells that support both registered and combinatorial outputs. These devices are designed to bridge the gap between fixed logic and complex programmable logic, offering cost-effective solutions for moderate complexity logic functions in industrial and consumer electronics.

Replacement Considerations

PALCE20V8Q-15JC/4

FAQ

Is the PALCE20V8Q-20JI/4 compatible with GAL20V8?

Yes, the device is pin and function compatible with all PAL 20V8 devices, including GAL20V8, allowing for direct plug-in replacement.

What technology does the PALCE20V8Q-20JI/4 use?

It uses electrically erasable CMOS technology, which provides reconfigurable logic capabilities and full testability.