LC4512B-35TN176C

Complex Programmable Logic Devices Overview

The LC4512B-35TN176C is a Complex Programmable Logic Device (CPLD) belonging to the ispMACH 4000B family, manufactured by Lattice Semiconductor. It features 512 macrocells and supports in-system programmability via JTAG. The device operates with a maximum frequency of 322 MHz and offers propagation delays of 3.5 ns. It accommodates 128 I/O lines within a 176-pin Thin Quad Flat Package (TQFP). The architecture utilizes CMOS technology and supports multiple voltage standards including LVCMOS 3.3, LVCMOS 2.5, and LVCMOS 1.8.

Complex Programmable Logic Devices Feature Summary

• 512 Macrocells with SuperFast architecture for high-density logic implementation
• Maximum operating frequency (fMAX) of 322 MHz
• In-System Programmability (ISP) support via JTAG interface
• 176-pin TQFP package with 128 accessible I/O pins

Complex Programmable Logic Devices Applications

• High-speed data bus bridging and protocol conversion
• Complex glue logic replacement in embedded systems
• Address decoding and control logic for memory interfaces

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix 'B' indicates the 3.3V/2.5V/1.8V variant when sourcing. Confirm the temperature grade corresponding to the 'C' suffix (Commercial) against project environmental requirements. Ensure programming tools support the ispMACH 4000B family architecture for successful configuration.

Complex Programmable Logic Devices Selection Notes

Select this model for designs requiring moderate density with predictable timing characteristics. The 3.5 ns delay suits applications needing faster switching than standard PLDs but lower complexity than FPGAs. Verify that the 176-pin footprint fits the PCB layout constraints compared to smaller packages like the 144-pin variant.

Complex Programmable Logic Devices Part Context

This component is part of the ispMACH 4000B series, which bridges the gap between traditional PALs/GALs and modern FPGAs. It retains the ease of use of older PLDs while offering significantly higher capacity through its macrocell-based architecture and non-volatile configuration storage.

Complex Programmable Logic Devices Replacement Considerations

Direct functional replacements include other members of the ispMACH 4000 family such as the LC4512V or LC4512Z, provided pin compatibility and speed grades are verified. Cross-family migration may require schematic adjustments due to differences in I/O bank structures and power supply requirements.