LC4256B-3F256AC

Complex Programmable Logic Devices Overview

The LC4256B-3F256AC is a Complex Programmable Logic Device (CPLD) belonging to the ispMACH 4000B family manufactured by Lattice Semiconductor. It features 256 macrocells and 16 logic blocks, providing 128 I/O pins within a 256-pin FineLine BGA package. The device supports System In-Programmability (SIP) for field updates. Electrical specifications include a maximum propagation delay of 3 ns and an internal supply voltage range of 2.3 V to 2.7 V. It operates within a junction temperature range of 0°C to +90°C and complies with RoHS standards.

Complex Programmable Logic Devices Feature Summary

• ispMACH 4000B architecture with 256 macrocells and 16 logic blocks
• System In-Programmability (SIP) capability for flexible updates
• High-speed performance with 3 ns maximum propagation delay
• 128 I/O pins in a 256-pin FineLine BGA package

Complex Programmable Logic Devices Applications

• High-density interface bridging in industrial control systems
• Address decoding and bus buffering in embedded computing
• State machine implementation for automated manufacturing equipment
• Protocol conversion between legacy and modern digital interfaces

Complex Programmable Logic Devices Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability constraints. Confirm that the specific suffix matches the required speed grade (-3) and package type (F256AC). Ensure handling procedures account for Moisture Sensitivity Level 3 (MSL 3), requiring appropriate storage conditions prior to soldering to prevent damage during assembly.

Complex Programmable Logic Devices Selection Notes

Select this model when designs require high pin counts (128 I/Os) and fast switching speeds (3 ns) within a CPLD form factor. Compare against the LC4256B-75 variant if lower speed requirements allow for cost optimization. Ensure the design tool environment supports the ispMACH 4000B family for successful synthesis and programming.

Complex Programmable Logic Devices Part Context

This component is part of the ispMACH 4000B series, designed to replace complex discrete logic gates. It offers non-volatile configuration, retaining programmed data without power. The series provides a balance of density and speed suitable for mid-range programmable logic applications where reprogrammability is essential.

Complex Programmable Logic Devices Replacement Considerations

Direct functional equivalents within the same family include the LC4256B-75FN256AC, though it features a slower 7.5 ns delay. Verify pin compatibility and electrical characteristics before substituting with other CPLD families.