LC4256V-75F256AC

Complex Programmable Logic Devices Overview

The LC4256V-75F256AC is a Complex Programmable Logic Device (CPLD) belonging to the ispMACH 4000V family. It features 256 macrocells organized within 16 Logic Array Blocks (LABs). The device supports In-System Programmability (ISP) via IEEE 1149.1 JTAG and offers a maximum propagation delay of 7.5 ns with a peak operating frequency of 322 MHz. It operates on a single 3.3 V supply voltage, providing up to 128 I/O pins in a 256-pin FineLine BGA package.

Complex Programmable Logic Devices Feature Summary

• ispMACH 4000V architecture with 256 macrocells and 16 LABs
• In-System Programmability (ISP) support via JTAG interface
• High-speed performance: 7.5 ns max delay and 322 MHz max frequency
• Single 3.3 V power supply operation

Complex Programmable Logic Devices Applications

• High-density logic replacement for legacy PLDs
• Interface bridging between different voltage domains
• State machine implementation in industrial control systems
• Address decoding and bus arbitration logic

Complex Programmable Logic Devices Procurement Notes

Verify component authenticity through authorized Lattice Semiconductor distributors or certified agents. Confirm that the specific suffix 'AC' corresponds to the commercial temperature range and packaging variant listed in official datasheets. Request RoHS compliance documentation and check for any Product Change Notifications (PCNs) regarding manufacturing updates or material substitutions before procurement.

Complex Programmable Logic Devices Selection Notes

Select this model when a design requires 256 macrocells with high-speed switching capabilities under a 3.3 V supply. Ensure the application fits within the 128 I/O pin limit and the thermal constraints of the FineLine BGA package. Compare against the LC4256B series if lower voltage operation (2.5 V) is required instead of the standard 3.3 V configuration.

Complex Programmable Logic Devices Part Context

This component is part of the Lattice ispMACH 4000V family, designed as a drop-in replacement for older GAL and PAL devices. It utilizes EEPROM technology for non-volatile storage, allowing for unlimited reprogramming cycles without external erasure equipment. The family emphasizes low power consumption and high density for compact embedded applications.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-compatible replacements may include other variants within the LC4256V series with different speed grades or package options. Verify electrical characteristics and pin assignments against the original design requirements before substituting.