PALCE20V8Q-25JI/4

Overview

The PALCE20V8Q-25JI/4 is an electrically erasable programmable logic device (EE PLD) manufactured by Lattice Semiconductor. It features a universal macrocell architecture with 14 dedicated inputs and 8 I/O lines, housed in a 28-pin plastic quad flat pack (PQCC) package. The device operates at a maximum frequency of 71.4 MHz with a typical propagation delay of 10 ns. Designed for commercial temperature ranges (0°C to +70°C), it utilizes CMOS technology and supports 5 V supply voltage. This component serves as a direct pin-compatible replacement for legacy GAL20V8 devices.

Feature Summary

• Electrically erasable CMOS technology enabling reconfigurable logic
• Universal macrocell architecture with 14 inputs and 8 I/Os
• Pin and function compatible with standard PAL20V8 devices
• Commercial temperature range operation up to 70°C

Applications

• Direct replacement for GAL20V8 and PAL20R8 series devices
• Combinatorial logic implementation in industrial control systems
• Address decoding and bus interface logic
• State machine design in embedded applications

Procurement Notes

Verify the specific suffix /4 indicates the commercial temperature grade and lead form when sourcing. Confirm manufacturer lineage as Cypress/Vantis products may share this part number structure. Ensure programming equipment supports EE PLD architectures rather than traditional OTP PALs. Check for RoHS compliance status if required for modern assembly processes.

Selection Notes

Select this component when a non-volatile, reprogrammable alternative to standard GAL20V8 is required. The 25 ns speed grade offers adequate performance for moderate-speed digital logic. Consider the 28-pin PLCC package constraints for PCB layout. Verify that the design toolchain supports the specific macrocell configuration of the PALCE20V8 family.

Part Context

This device belongs to the PALCE20V8 family, which bridges the gap between traditional PALs and complex PLDs. Originally developed by Vantis Corporation and later acquired by Cypress, these parts are now managed under Lattice Semiconductor's portfolio. They provide a cost-effective solution for upgrading obsolete GAL designs without changing the physical footprint or pinout.

Replacement Considerations

The PALCE20V8Q-25JI/4 is designed as a drop-in replacement for GAL20V8 variants. Ensure the original design does not rely on specific timing characteristics unique to bipolar GALs that differ from CMOS EE PLDs. Verify that the programming voltage levels match the capabilities of the available programmer.