LC4256B-75TN176I

Complex Programmable Logic Devices Overview

The LC4256B-75TN176I is a Complex Programmable Logic Device (CPLD) belonging to the ispMACH 4000B family, manufactured by Lattice Semiconductor. It features 256 macrocells organized into 16 Logic Array Blocks (LABs). The device supports System In-Programmability (ISP) and offers a maximum propagation delay of 7.5 ns with a top frequency of 133 MHz. It operates on a single 2.3V to 2.7V power supply and includes 128 I/O pins. The component is housed in a 176-pin Thin Quad Flat Package (TQFP) and is rated for an industrial operating temperature range of -40°C to +85°C.

Complex Programmable Logic Devices Feature Summary

• High-density architecture with 256 macrocells and 16 LABs
• System In-Programmability (ISP) via JTAG interface
• Fast switching speed with 7.5 ns max propagation delay
• Industrial temperature grade (-40°C to +85°C)

Complex Programmable Logic Devices Applications

• Protocol conversion and bridging between different bus standards
• Address decoding and memory mapping in embedded systems
• State machine implementation for industrial control logic

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature rating (-40°C to +85°C) as opposed to commercial variants. Confirm package integrity for the 176-pin TQFP form factor. Check for RoHS compliance status relative to manufacturing date codes. Ensure design files match the exact LC4256B revision.

Complex Programmable Logic Devices Selection Notes

Select this model when 256 macrocells are required for complex logic functions. The 7.5 ns speed grade suits high-frequency digital interfaces. Verify that the 176-pin TQFP footprint fits the PCB layout constraints. Ensure the system provides a stable 2.5V core voltage supply within the specified tolerance.

Complex Programmable Logic Devices Part Context

This part belongs to the ispMACH 4000B family, which succeeded the original ispMACH 4000 series. It shares architectural similarities with the LC4256V but utilizes a lower voltage core (2.5V vs 3.3V). The 'B' designation indicates the second generation of this density class, offering improved performance over earlier iterations.

Complex Programmable Logic Devices Replacement Considerations

The LC4256B-75TN176C is a commercial grade equivalent with identical electrical specifications but a limited temperature range (0°C to +70°C). Cross-compatibility requires verifying thermal requirements.