LC4128B-75TN128I

Complex Programmable Logic Devices Overview

The LC4128B-75TN128I 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 surface-mount 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 in-system programming via EEPROM technology and functions across an industrial temperature range of -40°C to +105°C.

Complex Programmable Logic Devices Feature Summary

• High-performance architecture with 333 MHz maximum operating frequency and 7.5 ns propagation delay
• 128 macrocells distributed across 8 Logic Array Blocks for flexible logic implementation
• Supports in-system programming using non-volatile EEPROM memory technology
• Industrial temperature rating spanning -40°C to +105°C

Complex Programmable Logic Devices Applications

• High-speed interface bridging between disparate system components
• Address decoding and control logic generation
• State machine implementation for sequential control applications
• Replacement for legacy GAL devices in existing designs

Complex Programmable Logic Devices Procurement Notes

This component is listed as obsolete or end-of-life by the manufacturer. Verification of current availability requires checking authorized distributors for remaining stock or surplus channels. Designers should confirm lifecycle status before finalizing specifications for new production runs.

Complex Programmable Logic Devices Selection Notes

Select this part when a high-density CPLD with fast switching speeds is required in a TQFP-128 package. Ensure the design utilizes a 2.5V power domain compatible with the specified voltage range of 2.3V to 2.7V. Verify that the 92 available I/O pins meet the interface requirements of the target application.

Complex Programmable Logic Devices Part Context

The LC4128B belongs to the ispMACH 4000B series, designed to replace complex discrete logic gates. It offers higher density than previous GAL-based solutions while maintaining low power consumption. This specific variant targets industrial applications requiring reliable performance under varying thermal conditions.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-to-pin replacements may be limited due to the obsolete status. Consider evaluating the LC4128C variant for updated manufacturing processes or the LC4128Z series for lower voltage operation, provided pin compatibility and feature sets align with the original design constraints.