ISPLSI 5256VE-100LT100I

Complex Programmable Logic Devices Overview

The ispLSI 5256VE-100LT100I is a high-density, in-system programmable logic device from Lattice Semiconductor's ispLSI 5000VE family. It features 12,000 PLD gates and 256 macrocells within four Generic Logic Blocks (GLBs). The device operates on a 3.3V supply with user-selectable 3.3V or 2.5V I/O levels. It supports up to 144 I/O pins and includes 256 registers. Key electrical specifications include a maximum operating frequency of 165 MHz and a propagation delay of 6.0 ns. The component utilizes E2CMOS technology for non-volatile storage and offers 10,000 erase/reprogram cycles.

Complex Programmable Logic Devices Feature Summary

• High-performance architecture with fmax = 165 MHz and tpd = 6.0 ns using E2CMOS technology.
• In-system programmability via IEEE 1149.1 Boundary Scan interface for manufacturing yield improvement and debugging.
• Flexible I/O configuration supporting 3.3V/2.5V levels with TTL compatibility and programmable slew rates.
• Enhanced pin-locking architecture with SuperWIDE Generic Logic Blocks and Global Routing Pool.

Complex Programmable Logic Devices Applications

• Complex state machine implementations requiring fast counters and address decoders.
• System control logic in industrial and communication equipment.
• Interface bridging between standard 5V TTL devices and 3.3V/2.5V systems.
• Prototyping and final production designs requiring reprogrammability.

Complex Programmable Logic Devices Procurement Notes

Verify the package type corresponds to the 'L' suffix in the model number, which indicates a 100-pin TQFP. Confirm the temperature grade 'I' matches industrial requirements (-40°C to +85°C). Ensure programming tools support the ispLSI 5000VE family and IEEE 1149.1 standards for in-system programming.

Complex Programmable Logic Devices Selection Notes

Select this device when designs require 256 macrocells and high-speed performance up to 165 MHz. The 100-pin TQFP package is suitable for applications needing 144 I/Os with moderate pin count constraints. Consider the 5256VE over the VA variant if JEDEC compatibility is not required, as it offers optimized macrocell features and simplified product term reset logic.

Complex Programmable Logic Devices Part Context

The ispLSI 5256VE belongs to the second-generation SuperWIDE high-density PLD family. It succeeds earlier ispLSI models by integrating a single-level Global Routing Pool and enhanced pin-locking capabilities. This family bridges the gap between low-density CPLDs and complex FPGAs, offering non-volatile reconfigurability with deterministic timing characteristics.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements must match the 256 macrocell density and 100-pin TQFP footprint. Note that the ispLSI 5000VA series is not JEDEC compatible with the VE series; pinouts may differ despite similar power/ground configurations. Verify that any substitute supports in-system programming via JTAG.