LC4256B-75FTN256AI

Complex Programmable Logic Devices Overview

The LC4256B-75FTN256AI is a complex programmable logic device (CPLD) belonging to the ispMACH 4000B family manufactured by Lattice Semiconductor. It features 256 macrocells organized within 16 logic blocks, providing 192 available input/output pins. The component operates with an internal supply voltage range of 2.3V to 2.7V and exhibits a maximum propagation delay of 7.5ns. It supports system-in-programmability via JTAG and is housed in a 256-pin FineLine BGA package. The device is rated for industrial operating temperatures ranging from 0°C to +85°C.

Complex Programmable Logic Devices Feature Summary

• ispMACH 4000B architecture with 256 macrocells and 16 logic blocks
• System-in-programmable capability supporting JTAG interface
• High-speed performance with 7.5ns maximum propagation delay
• Industrial temperature range operation (0°C to +85°C)

Complex Programmable Logic Devices Applications

• Complex glue logic replacement in digital systems
• Address decoding and bus bridging applications
• State machine implementation for control logic
• Interface translation between different voltage domains

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix 'FTN256A' against official Lattice documentation to confirm pinout compatibility and electrical characteristics relative to standard FTN256 variants. Confirm RoHS compliance status and moisture sensitivity level (MSL) ratings prior to assembly planning. Check for obsolescence notices as older CPLD families may have limited long-term availability.

Complex Programmable Logic Devices Selection Notes

Select this component when designs require moderate logic density with high I/O counts in a compact BGA footprint. The 7.5ns speed grade suits applications requiring fast combinatorial logic response. Ensure the design toolchain supports the ispMACH 4000B family for programming and verification. Compare against higher-density LC4512V models if additional macrocells are required.

Complex Programmable Logic Devices Part Context

This part belongs to the Lattice ispMACH 4000B series, which succeeded the original ispMACH 4000 family. The series is characterized by non-volatile Flash technology, allowing instant-on functionality without external configuration memory. The LC4256B variant specifically targets applications needing a balance of logic capacity and pin count in space-constrained environments.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-compatible replacements within the same package include other speed grades of the LC4256B series, such as the LC4256B-75FN256AC or LC4256B-10FN256AC, provided timing requirements allow for slower speeds. Cross-family migration to LC4512V devices requires schematic and layout modifications due to architectural differences.