LC4256B-75T100C

Complex Programmable Logic Devices Overview

The LC4256B-75T100C is a Complex Programmable Logic Device (CPLD) belonging to the ispMACH 4000B family, manufactured by Lattice Semiconductor. It features 256 macrocells and 16 Logic Array Blocks (LABs), providing high-density logic capabilities within a compact form factor. The device supports In-System Programming (ISP) for flexible design updates. It operates with a supply voltage range of 3V to 3.6V and offers a maximum propagation delay of 7.5 ns. The component is housed in a 100-TQFP package with 64 I/O pins, suitable for surface-mount applications.

Complex Programmable Logic Devices Feature Summary

• 256 Macrocells and 16 LABs for high-density logic implementation
• In-System Programmability (ISP) via JTAG interface
• Maximum propagation delay of 7.5 ns
• Operating temperature range of 0°C to 90°C (Commercial grade)

Complex Programmable Logic Devices Applications

• High-speed data bus interfacing
• Address decoding and control logic
• State machine implementation
• Protocol conversion

Complex Programmable Logic Devices Part Context

This part is part of the ispMACH 4000B family, which succeeded earlier generations like the 4000A. The 'B' suffix denotes this specific generation, while '75' indicates the 7.5 ns speed grade. The 'T100' specifies the 100-pin TQFP package. This family is designed for cost-sensitive applications requiring moderate logic density and non-volatile configuration retention.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-to-pin replacements within the same package include other speed grades of the LC4256B series, such as LC4256B-10T100C or LC4256B-15T100C, if timing requirements allow. Upgrades to the LC4256V series may require verification of electrical characteristics and software compatibility.