LC4256C-3FN256AC

Complex Programmable Logic Devices Overview

The LC4256C-3FN256AC is a high-density, in-system programmable Complex Programmable Logic Device (CPLD) from the Lattice CPLD4000V family. It features 256 macrocells and operates with supply voltages of 3.3V, 2.5V, or 1.8V. The device utilizes SuperFAST technology to achieve fast propagation delays, specified as 3ns for this speed grade. It is housed in a 256-pin FineLine BGA package, providing extensive I/O capabilities for complex digital logic applications requiring non-volatile configuration and low power consumption.

Complex Programmable Logic Devices Feature Summary

• 256 Macrocells with non-volatile Flash memory architecture
• SuperFAST technology ensuring 3ns maximum propagation delay
• Multi-voltage support: 3.3V, 2.5V, and 1.8V I/O standards
• In-System Programmability (ISP) via JTAG interface

Complex Programmable Logic Devices Applications

• High-speed bus bridging and protocol conversion
• Address decoding and control logic in embedded systems
• State machine implementation for industrial automation
• Interface adaptation between different voltage domains

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix codes against the manufacturer's current datasheet to confirm package type, temperature range, and lead-free status. Ensure compatibility with existing PCB footprints for the 256-pin FineLine BGA. Confirm that the design toolchain supports the CPLD4000V family for programming and verification.

Complex Programmable Logic Devices Selection Notes

Select this component when a non-volatile solution with deterministic timing is required. The 256 macrocell count suits moderate complexity logic designs. Compare against the LC4256V series if lower power consumption is critical, noting potential differences in switching characteristics and operating voltage ranges between the C and V variants.

Complex Programmable Logic Devices Part Context

This part belongs to the Lattice CPLD4000V family, which succeeded earlier ISPLSI and MachXO lines in the high-density PLD market. It competes with similar density devices from Altera (MAX 7000S/9000S legacy) and Xilinx (CoolRunner-II). The family is characterized by its Flash-based technology, eliminating the need for external configuration memory.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-to-pin replacements are limited due to proprietary architectures. Potential functional equivalents include the Lattice LC4256V series (verify voltage/power specs) or Microchip MAX II/MAX V families (requires logic restructuring). Cross-vendor migration requires significant schematic and code changes.