LC5128B-5T128C

Complex Programmable Logic Devices Overview

The LC5128B-5T128C is a Complex Programmable Logic Device (CPLD) belonging to the ispLSI 5000 family, manufactured by Lattice Semiconductor. It features 128 macrocells and supports up to 96 I/O lines within a 128-pin TQFP package. The device utilizes EEPROM technology for non-volatile configuration, enabling in-system programmability. Key electrical specifications include a maximum operating frequency of 200 MHz and a propagation delay of 5 ns. It operates with a supply voltage range of 3.0 V to 3.6 V and is rated for commercial temperature applications from 0°C to +70°C.

Complex Programmable Logic Devices Feature Summary

• High-performance architecture with 200 MHz maximum frequency and 5 ns propagation delay
• EEPROM-based non-volatile memory allowing instant power-up operation without external configuration devices
• Supports in-system programming via JTAG interface for flexible design updates
• 128 macrocells organized into logic array blocks with high-density I/O capabilities

Complex Programmable Logic Devices Applications

• High-speed interface bridging between different protocol standards
• Address decoding and bus buffering in embedded systems
• State machine implementation for control logic
• Replacement for legacy GAL and PAL devices in existing designs

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix '5T128C' against official Lattice documentation to confirm the speed grade (5 ns), temperature range (Commercial), and package type (128-pin TQFP). Ensure compatibility with standard JTAG programming tools such as the ispDOWNLOAD cable. Check for RoHS compliance status if required by current manufacturing standards, as older production runs may vary.

Complex Programmable Logic Devices Selection Notes

Select this component when a moderate density CPLD with fast propagation delays is required for glue logic or interface adaptation. The 128 macrocell count suits applications needing complex combinational and sequential logic without the overhead of an FPGA. Consider the 128-pin TQFP package constraints regarding PCB space and thermal dissipation. Compare against the LC4000 series if lower power consumption is prioritized over raw speed.

Complex Programmable Logic Devices Part Context

This part belongs to the ispLSI 5000 family, which succeeded the earlier ispLSI 2000/3000 series. It represents a high-density solution for its time, offering significant logic capacity compared to standard PLDs. The family is known for its robust in-system programming capabilities and ease of use with Lattice's ispDesign EXPERT software suite.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-to-pin replacements are limited due to the specific macrocell count and I/O distribution. The LC5128A series offers similar functionality but with potentially different timing characteristics. For modern equivalents, consider the Lattice MACH XO or ispMACH 4000V families, though these require schematic redesign and do not offer direct footprint compatibility.