LC4256C-75FT256BC

Complex Programmable Logic Devices Overview

The LC4256C-75FT256BC is a Complex Programmable Logic Device (CPLD) belonging to the ispMACH 4000B family manufactured by Lattice Semiconductor. It features an architecture with 16 Logic Array Blocks (LABs) and 256 macrocells, providing 128 I/O pins. The device operates within an internal supply voltage range of 2.3V to 2.7V and supports System In-Programmability (ISP). It is housed in a 256-pin FineLine BGA package and guarantees a maximum propagation delay of 7.5ns. The component is designed for surface mount installation and complies with RoHS standards.

Complex Programmable Logic Devices Feature Summary

• ispMACH 4000B architecture with 256 macrocells and 16 LABs
• System In-Programmability (ISP) support via JTAG
• Maximum propagation delay of 7.5ns
• RoHS compliant and lead-free construction

Complex Programmable Logic Devices Applications

• High-density logic replacement
• Bus bridging and protocol conversion
• Address decoding and control logic

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix 'BC' against official Lattice documentation to confirm temperature grade and packaging details. Confirm current lifecycle status as older CPLD families may have limited availability or obsolescence notices. Ensure design files match the exact pinout for the FT256 package variant.

Complex Programmable Logic Devices Selection Notes

Select this model when 256 macrocells are required with a 7.5ns speed grade. Compare against the LC4256ZE series if lower power consumption at 1.8V is prioritized over the standard 2.5V operation. Verify that the 128 I/O count fits the board layout constraints for the 256-pin BGA footprint.

Complex Programmable Logic Devices Part Context

This part belongs to the Lattice ispMACH 4000B family, which succeeded the original ispMACH 4000 series. The 'C' designation typically indicates a commercial temperature range variant within the product line. It serves as a high-density solution for legacy system upgrades where ISP capability is essential.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-compatible replacements within the same family include other LC4256B variants with different speed grades or packages. Cross-family migration to newer Lattice CPLDs requires schematic and timing analysis.