LC4128B-75T128I

Complex Programmable Logic Devices Overview

The LC4128B-75T128I is a Complex Programmable Logic Device (CPLD) from the Lattice ispMACH 4000B family. It features 128 macrocells organized into 8 Logic Array Blocks (LABs) and provides 92 I/O pins within a TQFP-128 package. The device operates at a supply voltage of 2.5 V, with a maximum operating frequency of 333 MHz and a typical propagation delay of 7.5 ns. It supports industrial temperature ranges from -40°C to +105°C and utilizes EEPROM technology for non-volatile configuration.

Complex Programmable Logic Devices Feature Summary

• High-performance architecture with fMAX up to 333 MHz and 7.5 ns propagation delay
• 128 macrocells distributed across 8 LABs with 80 product terms per output
• Industrial temperature range support (-40°C to +105°C)
• In-system programmability via JTAG interface

Complex Programmable Logic Devices Applications

• High-speed digital logic interfacing
• Protocol conversion in industrial control systems
• Address decoding and bus bridging
• State machine implementation in embedded controllers

Complex Programmable Logic Devices Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and moisture sensitivity level (MSL 3) handling requirements during storage and assembly. Check for obsolescence notices as this specific variant may have limited availability compared to newer family members.

Complex Programmable Logic Devices Selection Notes

Select this model when 128 macrocells and 92 I/Os are required in a TQFP-128 footprint. Ensure the design operates within the 2.3 V to 2.7 V supply voltage range. Consider the 7.5 ns delay specification for timing closure in high-frequency applications requiring industrial temperature stability.

Complex Programmable Logic Devices Part Context

This part belongs to the ispMACH 4000B series, designed for high-density PLD applications. It serves as a successor to earlier GAL devices while offering reprogrammability. The 'B' suffix denotes the 2.5V core voltage variant, distinguishing it from 3.3V (V) or 1.8V (Z/C) families.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-compatible replacements include other variants within the LC4128 family such as LC4128V-75TN128I (3.3V) or LC4128ZC-75TN128I (1.8V), provided voltage levels match the system design. Verify electrical characteristics and I/O drive strengths before substitution.