LC4256C-75TN100C

Complex Programmable Logic Devices Overview

The LC4256C-75TN100C is a Complex Programmable Logic Device (CPLD) belonging to the ispMACH 4000C family, manufactured by Lattice Semiconductor Corporation. It features 256 macrocells organized into 16 Logic Array Blocks (LABs) and provides 64 I/O pins. The device operates within a supply voltage range of 3V to 3.6V and supports System In-Programmability (ISP). It utilizes a non-volatile configuration memory, allowing immediate execution upon power-up without external boot ROM. The component is housed in a 100-LQFP package and is rated for commercial temperature operation from 0°C to 90°C TJ.

Complex Programmable Logic Devices Feature Summary

• ispMACH 4000C architecture with 256 macrocells and 16 LABs
• System In-Programmability (ISP) capability via JTAG
• Non-volatile configuration memory for instant power-on operation
• Maximum propagation delay of 7.5 ns

Complex Programmable Logic Devices Applications

• High-density logic replacement
• Address decoding and data routing
• Interface bridging between different voltage domains
• State machine implementation

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix 'C' against official Lattice documentation to confirm it denotes the commercial temperature grade (0°C to 90°C) rather than an industrial variant. Ensure compatibility with standard JTAG programming interfaces for ISP functionality. Confirm RoHS compliance status as per the latest manufacturer datasheet revision.

Complex Programmable Logic Devices Selection Notes

Select this model when 256 macrocells are sufficient for the design complexity. Compare against the LC4256V series if lower voltage operation (1.8V) or higher speed (5ns) is required. Verify that the 100-LQFP package fits the PCB footprint constraints. Check if the 7.5 ns delay meets the timing requirements of the target application.

Complex Programmable Logic Devices Part Context

This part belongs to the Lattice ispMACH 4000C family, which bridges the gap between simple PLDs and high-density FPGAs. It offers a cost-effective solution for medium-complexity digital designs requiring non-volatile logic. The family includes variants like LC4064C and LC4128C with fewer macrocells, and LC4384C with more.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-to-pin replacements within the same package include other members of the ispMACH 4000C family such as LC4256C-75TN100I (if industrial temp is acceptable) or LC4128C-75TN100C (for reduced capacity). Cross-family migration to ispMACH 4000V requires re-evaluation of voltage levels and timing.