LC4128C-75TN128I

Complex Programmable Logic Devices Overview

The LC4128C-75TN128I is a Complex Programmable Logic Device (CPLD) from the Lattice ispMACH 4000C family. It features 128 macrocells organized into 8 Logic Array Blocks (LABs), providing high-density programmable logic in a single package. The device utilizes non-volatile EEPROM memory technology, allowing for system-in-programmability and repeated reconfiguration without external storage. Key electrical specifications include a maximum operating frequency of 111 MHz and a propagation delay of 7.5 ns. It operates with a supply voltage range of 1.7V to 1.9V and supports JTAG boundary scan testing.

Complex Programmable Logic Devices Feature Summary

• 128 Macrocells with 8 Logic Array Blocks (LABs) for complex logic implementation
• Non-volatile EEPROM memory architecture enabling System-In-Programmability (SIP)
• Maximum operating frequency of 111 MHz with 7.5 ns propagation delay
• Supports JTAG boundary scan (BST) for manufacturing test and debugging

Complex Programmable Logic Devices Applications

• High-density interface bridging between legacy and modern digital systems
• State machine control and protocol conversion in industrial automation
• Address decoding and bus arbitration in embedded computing architectures
• Replacement for discrete logic gates in space-constrained PCB designs

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix 'TN128I' corresponds to the Lead-Free (RoHS compliant) TQFP-128 package variant. Confirm the temperature grade 'I' indicates Industrial range (-40°C to +85°C). Ensure design files account for the 1.8V nominal supply voltage requirements inherent to the ispMACH 4000C family. Cross-reference datasheet DS1020 for accurate pinout and power-down current specifications.

Complex Programmable Logic Devices Selection Notes

Select this component when 128 macrocells are sufficient for the target logic density and a non-volatile solution is required to eliminate external configuration flash memory. Compare against the LC4128ZC series if lower power consumption or higher speed (up to 400 MHz) is critical, noting that the ZC series may require different voltage domains. Verify I/O count requirements, as this package provides up to 92 user I/O pins.

Complex Programmable Logic Devices Part Context

This part belongs to the Lattice ispMACH 4000C family, which succeeded the ispMACH 4000B series. It shares architectural similarities with the LC4128ZC but offers different performance trade-offs. The 'C' designation identifies the specific process node and voltage characteristics within the broader LC4128 product line, distinguishing it from the V, B, and Z variants.

Complex Programmable Logic Devices Replacement Considerations

Direct functional equivalents within the same package include other LC4128C variants with different speed grades or temperature ranges. For pin-compatible upgrades requiring higher performance, the LC4128ZC-75TN128I offers improved speed but requires verification of voltage compatibility and power budget adjustments.