LC4256C-75T100C

Complex Programmable Logic Devices Overview

The LC4256C-75T100C is a Complex Programmable Logic Device (CPLD) belonging to the Lattice ispMACH 4000V family. It features 256 macrocells and 16 Logic Array Blocks (LABs), providing 64 I/O pins in a 100-pin TQFP package. The device operates on a 3.0 V to 3.6 V supply voltage with a maximum propagation delay of 7.5 ns and a maximum operating frequency of 322 MHz. Designed for industrial applications, it supports an extended temperature range from -40°C to +105°C and allows for in-system programming.

Complex Programmable Logic Devices Feature Summary

• High-performance architecture with a maximum operating frequency of 322 MHz and 7.5 ns propagation delay.
• Contains 256 macrocells organized into 16 Logic Array Blocks (LABs) with enhanced clock and reset controls.
• Supports In-System Programming (ISP) via JTAG interface for flexible design updates.
• Industrial-grade operation with a wide temperature range of -40°C to +105°C.

Complex Programmable Logic Devices Applications

• High-speed data acquisition systems requiring fast logic processing.
• Address decoding and bus bridging in industrial control equipment.
• State machine implementation for automated manufacturing processes.
• Protocol conversion between different digital communication standards.

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix 'C' against official Lattice documentation to confirm the commercial temperature grade variant, as datasheets often group C and I grades. Ensure the ordering part number matches the exact speed grade (-75) and package type (TQFP-100). Confirm RoHS compliance status directly with the manufacturer or authorized distributors prior to procurement.

Complex Programmable Logic Devices Selection Notes

Select this component when a design requires 256 macrocells and 64 I/Os within a 100-pin footprint. The -75 speed grade is suitable for systems needing up to 322 MHz performance. Compare against the LC4256V series if lower power consumption is critical, noting that the V series may offer different electrical characteristics despite similar logical density.

Complex Programmable Logic Devices Part Context

This CPLD is part of the ispMACH 4000V family, which succeeded earlier ispMACH 4000 devices. The family is characterized by its non-volatile configuration memory, allowing instant-on functionality without external configuration chips. The LC4256C shares architectural similarities with the LC4256V and LC4256Z variants, differing primarily in speed grades and temperature specifications.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-compatible replacements include other members of the LC4256 family such as LC4256V-75T100C or LC4256Z-75T100C, provided the temperature and speed requirements are met. Verify that any substitute maintains the same 100-TQFP package dimensions and electrical parameters.