PALCE20V8H-25JC/4

Overview

The PALCE20V8H-25JC/4 is an electrically erasable CMOS programmable array logic device manufactured by Lattice Semiconductor. It features a universal macrocell architecture with 20 input/output pins and 8 registered outputs, housed in a 28-pin PLCC package. The device operates at a maximum propagation delay of 25 ns and supports a supply voltage range typical for 5V CMOS logic. It includes features such as individually programmable output polarity, preloadable output registers for testability, and automatic register reset on power-up.

Feature Summary

• Electrically erasable CMOS technology enabling reconfigurable logic
• Universal macrocell architecture compatible with GAL20V8 standards
• 28-pin PLCC package with 20 I/O lines
• Programmable enable/disable control and output polarity

Applications

• Direct replacement for legacy 24-pin combinatorial PAL devices
• PCI compliant interface logic implementation
• General-purpose digital logic prototyping

Part Context

This component belongs to the PALCE20V8 family of advanced PAL devices. It is designed to be pin-and-function compatible with all PAL 20V8 devices, allowing for direct plug-in replacement in existing designs while offering the benefits of electrical erasability and full testability through its CMOS technology.

Replacement Considerations

The PALCE20V8H-25JC/4 is fully compatible with GAL20V8 devices and can directly replace PAL20R8 series devices. Designers should verify that the target application utilizes standard 5V logic levels and does not require higher speed performance than the 25 ns specification allows.