ISPLSI 5256VE-100LT128I

Complex Programmable Logic Devices Overview

The ispLSI 5256VE-100LT128I 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 a 128-pin Thin Quad Flat Package (TQFP). The device operates on a 3.3V supply with user-selectable 3.3V or 2.5V I/O levels. Key electrical specifications include a maximum operating frequency of 165 MHz and a propagation delay of 6.0 ns. It utilizes E2CMOS technology for non-volatile configuration and supports IEEE 1149.1 boundary scan testing.

Complex Programmable Logic Devices Feature Summary

• High Density: 12,000 PLD gates and 256 macrocells organized into Generic Logic Blocks (GLBs).
• In-System Programmability: Supports reprogramming via IEEE 1149.1 JTAG interface without removing the device from the PCB.
• Flexible I/O: User-selectable 3.3V/2.5V I/O levels with independent VCCIO reference; interfaces with standard 5V TTL devices.
• High Performance: Achieves fmax = 165 MHz and tpd = 6.0 ns using SuperWIDE architecture and Global Routing Pool.

Complex Programmable Logic Devices Applications

• Complex state machine implementations requiring fast counters and address decoders.
• System control logic for industrial and communication equipment.
• Interface bridging between different voltage domains (3.3V, 2.5V, and 5V TTL).
• Prototyping and final production designs requiring field reconfigurability.

Complex Programmable Logic Devices Procurement Notes

Verify the package type matches the 'L' suffix (128-pin TQFP) and speed grade '100'. Confirm the temperature range 'I' corresponds to Industrial (-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 model for designs requiring up to 144 I/O pins and 256 registers. Compare against other ispLSI 5000VE members (e.g., 5128VE, 5384VE) based on gate count needs. Note that the 5256VE is not JEDEC compatible with the older 5000VA family due to architectural differences in macrocell optimization and product term sharing.

Complex Programmable Logic Devices Part Context

This component belongs to the ispLSI 5000VE family, which succeeded the ispLSI 5000VA series. The VE family introduces optimized macrocells and enhanced pin-locking capabilities via the Global Routing Pool. It represents Lattice's second-generation SuperWIDE high-density PLD technology, focusing on reducing system costs while maintaining high performance and low power consumption.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-to-pin replacements within the same package are limited due to specific GLB configurations. Consider the ispLSI 5256VA if legacy compatibility is required, though functional equivalence may vary. Other family members like the ispLSI 5384VE offer higher density but different pin counts.