LC4256B-75F256AI

Complex Programmable Logic Devices Overview

The LC4256B-75F256AI 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 and supports up to 128 I/O pins. The device operates with an internal supply voltage range of 2.3V to 2.7V and achieves a maximum propagation delay of 7.5ns. It utilizes In-System Programmability (ISP) for configuration and is housed in a 256-pin FineLine BGA package. The component is rated for industrial operating temperatures ranging from 0°C to +90°C junction temperature.

Complex Programmable Logic Devices Feature Summary

• 256 Macrocells across 16 logic blocks
• Up to 128 user-accessible I/O pins
• 7.5ns maximum propagation delay
• In-System Programmability (ISP) support

Complex Programmable Logic Devices Applications

• High-density logic replacement
• Bus protocol bridging
• Address decoding and control logic

Complex Programmable Logic Devices Part Context

This part belongs to the ispMACH 4000B family, which succeeded the original ispMACH 4000 series. The 'B' suffix indicates the second generation of this architecture, offering improved performance and density compared to predecessors like the LC4256V. The specific suffix 'F256A' denotes the 256-pin FineLine BGA package variant.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-to-pin replacements within the same package are limited due to the obsolescence status. Designers may consider migrating to newer Lattice families such as CrossLink-N or CertusPro-NX, though these require schematic and layout redesigns rather than simple substitution.