ISPLSI5128VE-100LT128I

Overview

The ispLSI 5128VE-100LT128I is a high-density Complex Programmable Logic Device (CPLD) from Lattice Semiconductor's ispLSI 2000VE family. It features 512 macrocells, 64 logic array blocks (LABs), and supports up to 96 I/O pins within a 128-pin Thin Quad Flat Package (TQFP). The device operates at a maximum frequency of 100 MHz with a typical propagation delay of 5 ns. It utilizes non-volatile EEPROM technology for configuration storage, allowing in-system programmability without external memory components.

Feature Summary

• High Density: Contains 512 macrocells and 64 LABs for complex logic implementation.
• In-System Programmability: Supports ISP via JTAG or dedicated pins using on-chip EEPROM.
• Performance: Achieves 100 MHz operation with 5 ns typical propagation delay.
• Package: Available in a 128-pin TQFP suitable for surface mount applications.

Applications

• High-speed interface bridging between legacy and modern system components.
• Complex glue logic replacement in industrial control systems.
• Address decoding and bus arbitration in embedded computing architectures.

Procurement Notes

Verify the specific suffix 'I' indicates industrial temperature range (-40°C to +85°C). Confirm package integrity for the LT128 designation. Check current availability status as older CPLD families may have limited stock or end-of-life implications compared to newer FPGA alternatives.

Selection Notes

Select this component when non-volatile configuration is required without external boot ROMs. Ensure the design fits within the 512 macrocell limit and that the 100 MHz speed grade meets timing constraints. Compare against the ispLSI 5128V series if commercial temperature range suffices to potentially reduce cost.

Part Context

This part belongs to the ispLSI 2000VE series, an evolution of Lattice's earlier ispLSI 2000 line. It offers higher density than the 2128VE while maintaining compatibility with the same development tools and programming interfaces. It serves as a bridge between low-density GAL replacements and larger FPGA solutions.

Replacement Considerations

Direct pin-to-pin replacements are limited within the same family. Consider the ispLSI 5128VE-100LT128C for commercial temperature needs. For modern equivalents, evaluate Lattice's MachXO3 or iCE40 UltraPlus families, though these require schematic and layout modifications due to different architecture and pinouts.