LC4256V-5T176I

Complex Programmable Logic Devices Overview

The LC4256V-5T176I is a Complex Programmable Logic Device (CPLD) from the ispMACH 4000V family, manufactured by Lattice Semiconductor. It features 256 macrocells and supports up to 128 I/O lines within a 176-pin Low-profile Quad Flat Package (LFQFP). The device operates with a maximum clock frequency of 156 MHz and includes JTAG boundary scan capabilities for in-system programming and testing. It is RoHS compliant and lead-free.

Complex Programmable Logic Devices Feature Summary

• High-density CPLD architecture with 256 macrocells
• Supports system-in-programmability via JTAG interface
• Super-fast performance with 156 MHz maximum clock frequency
• 176-pin LFQFP package optimized for space-constrained designs

Complex Programmable Logic Devices Applications

• Industrial control systems requiring reliable logic interfacing
• Communication infrastructure protocol conversion
• Consumer electronics peripheral management
• Automotive display and sensor interface logic

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix '5T176I' against the latest official Lattice datasheet to confirm temperature range and package variant. Ensure compatibility with existing design tools such as Lattice Diamond or Synplify Pro. Confirm that the 176-pin LFQFP footprint matches the target PCB layout specifications before finalizing procurement.

Complex Programmable Logic Devices Selection Notes

Select this component when a moderate density CPLD with high-speed performance is required. The 256-macrocell count suits applications needing complex state machines or bus interfacing without the complexity of an FPGA. Consider the 156 MHz speed grade for timing-critical synchronous designs. Evaluate pin count requirements to ensure the 128 available I/O lines meet system connectivity needs.

Complex Programmable Logic Devices Part Context

This part belongs to the ispMACH 4000V series, designed for low-power, high-performance programmable logic applications. The V-series offers improved power efficiency compared to earlier generations while maintaining backward compatibility with standard CPLD development flows. It serves as a drop-in replacement for legacy GAL devices in many industrial and consumer applications.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements within the same family include other variants of the LC4256V series with different speed grades or package options. Verify that any substitute maintains the same 176-pin LFQFP footprint and electrical characteristics. Cross-reference with Lattice's official obsolescence notices to ensure long-term availability.