LC4128C-5T128I

Complex Programmable Logic Devices Overview

The LC4128C-5T128I is a Complex Programmable Logic Device (CPLD) from the Lattice ispMACH 4000C family. It features 128 macrocells and supports up to 92 I/O lines within a 128-pin Thin Quad Flat Package (TQFP). The device operates with a maximum frequency of 156 MHz and includes system-in-programmability capabilities alongside JTAG boundary scan support. Designed for industrial applications, it functions across a temperature range of -40°C to +105°C.

Complex Programmable Logic Devices Feature Summary

• 128 Macrocells with 92 available I/O pins
• Maximum operating frequency of 156 MHz
• Industrial temperature range (-40°C to +105°C)
• System-in-programmability and JTAG support

Complex Programmable Logic Devices Applications

• Industrial control systems requiring high-density logic
• Interface bridging in communication equipment
• General-purpose programmable logic in embedded designs

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature rating (-40°C to +105°C) and the '5' indicates the 5 ns speed grade. Confirm the package type matches the 128-pin TQFP footprint required by the design. Ensure RoHS compliance status aligns with project requirements, as older manufacturing runs may vary.

Complex Programmable Logic Devices Selection Notes

Select this component when 128 macrocells are sufficient for the logic density needs. The 156 MHz performance suits moderate-speed synchronous designs. Compare against the LC4128V or LC4128Z variants if different voltage levels (3.3V vs 1.8V) or higher speeds are required. Verify pin compatibility with existing PCB layouts using the 128-TQFP dimensions.

Complex Programmable Logic Devices Part Context

This part belongs to the Lattice ispMACH 4000C series, which provides non-volatile configuration and high-density logic resources. It serves as a successor to earlier GAL devices, offering reprogrammability and complex state machine implementation capabilities in a compact form factor suitable for space-constrained industrial boards.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements include other members of the LC4128 family such as LC4128V-5T128I or LC4128Z-5T128I, provided voltage and temperature specifications match. Cross-family migration to newer Lattice CPLDs requires schematic and code verification due to architectural differences.