LC4256C-3T100C

Complex Programmable Logic Devices Overview

The LC4256C-3T100C is a complex programmable logic device (CPLD) from the Lattice ispMACH 4000ZE family. It features 256 macrocells and supports up to 92 user I/O pins within a TQFP-100 package. The device operates with a single 3.3V supply voltage and offers a maximum operating frequency of 250 MHz, with a typical propagation delay of 3 ns. Designed for industrial applications, it functions reliably across an extended temperature range of -40°C to +85°C. Key architectural features include non-volatile configuration storage, allowing for instant-on operation without external memory, and support for in-system programming via IEEE 1149.1 JTAG boundary scan.

Complex Programmable Logic Devices Feature Summary

• 256 macrocells with 92 user I/Os in a 100-pin TQFP package
• High-speed performance: 250 MHz max frequency, 3 ns propagation delay
• Non-volatile architecture enabling instant-on and reprogrammability
• Industrial temperature range (-40°C to +85°C) and 3.3V operation

Complex Programmable Logic Devices Applications

• Bus bridging and protocol conversion
• Glue logic replacement in high-density designs
• Power-up control and system reset management
• Address decoding and memory interface control

Complex Programmable Logic Devices Procurement Notes

Verify the specific speed grade suffix '3' corresponds to the required 3 ns timing constraints for your design. Confirm that the TQFP-100 package dimensions align with your PCB footprint requirements. Ensure the design toolchain supports the ispMACH 4000ZE family for proper synthesis and place-and-route. Check for any lead-free or RoHS compliance markings if environmental regulations apply to your manufacturing process.

Complex Programmable Logic Devices Selection Notes

Select this component when a non-volatile CPLD with moderate density (256 macrocells) is required. Compare against the LC4512C for higher density needs or the LC4128C for lower cost options. Verify that the 3.3V I/O levels match your system interfaces; level shifting may be necessary for 1.8V or 2.5V domains. Consider the TQFP-100 package availability versus BGA options if board space is constrained.

Complex Programmable Logic Devices Part Context

This part belongs to the Lattice ispMACH 4000ZE series, which combines CPLD flexibility with FPGA-like performance. It is designed to replace discrete logic gates and simpler PLDs in modern systems. The series is known for its low power consumption and robust security features due to its non-volatile nature. It serves as a bridge between simple logic devices and more complex FPGAs.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-to-pin replacements are limited within the same family. The LC4256C-3TQ100C is the standard commercial variant. For industrial grades, verify if the 'I' suffix is required instead of 'C'. Cross-reference with the LC4256V series for potential upgrades, noting differences in speed grades and packaging options.