PALCE22V10Q-25PC/4

Overview

The PALCE22V10Q-25PC/4 is a high-performance Complex Programmable Logic Device (CPLD) from Lattice Semiconductor's Mach family. It features 22 General Input/Output pins and supports up to 10 macrocells. The device operates with a maximum propagation delay of 25 ns, ensuring fast logic switching speeds. It utilizes CMOS technology for low power consumption and offers in-system programmability via JTAG interfaces. The component is housed in a 28-pin Plastic Dual In-line Package (PDIP), suitable for through-hole mounting on printed circuit boards.

Feature Summary

• 22 I/O pins with 10 macrocells for flexible logic implementation
• 25 ns maximum propagation delay for high-speed applications
• In-system programmability using IEEE 1149.1 JTAG interface
• CMOS technology providing low static and dynamic power consumption

Applications

• Address decoding and bus interfacing in embedded systems
• Replacement for legacy GAL devices in existing designs
• State machine implementation for control logic
• Parallel I/O expansion for microcontrollers

Procurement Notes

Verify the specific suffix 'Q' indicates commercial temperature range and 'PC/4' denotes the PDIP package variant. Confirm that the device requires an external programming cable compatible with Lattice's ispVMS software. Ensure voltage supply levels match the datasheet specifications before integration into the target system.

Selection Notes

Select this component when a moderate number of I/Os and macrocells are required without the complexity of FPGA architectures. The 25 ns speed grade is suitable for general-purpose digital logic where timing constraints are not extremely tight. Consider the PDIP package only if prototyping or through-hole manufacturing processes are mandated by the design requirements.

Part Context

This part belongs to the Lattice Mach CPLD family, designed to bridge the gap between simple PLDs and complex FPGAs. It offers deterministic timing and non-volatile configuration memory, allowing it to retain program data without external storage. The Mach architecture provides a cost-effective solution for logic consolidation in industrial and consumer electronics.

Replacement Considerations

Direct pin-to-pin replacements may include other PALCE22V10 variants with different speed grades or package options. Verify compatibility with existing programming tools and ensure that any substitute maintains the same I/O count and macrocell structure to avoid schematic modifications.