LC4256C-3FT256AC

Complex Programmable Logic Devices Overview

The LC4256C-3FT256AC is a complex programmable logic device (CPLD) from Lattice Semiconductor’s ispMACH 4000CM family. It features 256 macrocells with a maximum system clock frequency of 333 MHz and supports up to 218 I/O pins. The device utilizes a non-volatile Flash memory architecture for instant-on configuration, eliminating the need for external configuration components. Key electrical parameters include a 2.5V–3.3V VCC core voltage range and support for 5V-tolerant I/O interfaces. It is housed in a 256-pin FineLine BGA package, designed for high-density applications requiring low power consumption and robust performance.

Complex Programmable Logic Devices Feature Summary

• 256 Macrocells with 333 MHz max system clock speed
• Non-volatile Flash technology for instant-on operation
• Up to 218 user-accessible I/Os with 5V tolerance
• 2.5V to 3.3V core voltage operation

Complex Programmable Logic Devices Applications

• High-density interface bridging and protocol conversion
• System control and monitoring in industrial equipment
• Address decoding and bus buffering in embedded systems
• Replacement for legacy GAL and PAL devices

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix codes against the official datasheet to confirm temperature grade and package variant. Ensure the ordering part number matches the required speed grade (-3) and package type (FTBGA-256). Confirm supply chain authenticity through authorized distributors to avoid counterfeit components.

Complex Programmable Logic Devices Selection Notes

Select this model when design requirements exceed the capacity of smaller CPLDs but do not necessitate an FPGA. The 256-macrocell count and 218 I/O limit define the maximum complexity. Consider the FT256 package dimensions and pin pitch if board space is constrained. Verify that the 5V I/O tolerance meets the interfacing voltage levels of the target system.

Complex Programmable Logic Devices Part Context

This component belongs to the ispMACH 4000CM family, which bridges the gap between simple logic gates and complex FPGAs. It offers deterministic timing and low static power consumption, making it suitable for cost-sensitive, high-volume applications where instant-on functionality is critical.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements are limited within the same ispMACH 4000CM family. Higher density options include the LC4512V or LC4256V variants. Legacy GAL devices may be replaced by lower-density members of this family if pin counts align.