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LC4256V-75TN176I

LC4256V-75TN176I

Lattice Semiconductor Corporation
CPLD - Complex Programmable Logic Devices PROGRAMMABLE SUPER FAST HI DENSITY PLD
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Overview

The LC4256V-75TN176I is a high-density Complex Programmable Logic Device (CPLD) from Lattice Semiconductor's ispMACH 4000V series. It features 256 macrocells and 128 I/O pins in a 176-TQFP package, offering 7.5 ns propagation delay for high-speed logic integration. This device operates at 3.3V and is designed for industrial applications requiring 5V-tolerant inputs and low static power consumption.

Why Choose This Part

This CPLD combines high-speed performance with a low typical standby current of 128uA, making it suitable for power-sensitive designs. Its 5.5V tolerant inputs allow for easy interfacing in mixed-voltage environments without external level shifters. The In-System Programmable nature via JTAG ensures fast prototyping and simplified field updates.

Applications

I/O Expansion
Providing additional 5V-tolerant digital I/O for microcontrollers in industrial control systems.
Bus Bridging
Translating signals between different logic levels or interfacing asynchronous bus protocols.
Glue Logic
Consolidating multiple discrete logic gates, flip-flops, and counters into a single high-density package to save PCB space.
Power-Up Sequencing
Managing complex power-on reset and sequencing requirements for multi-rail FPGA or SoC boards.

Key Specifications

Mounting Type Surface Mount
Number of I/O 128
Package / Case 176-LQFP
Programmable Type In System Programmable
Number of Macrocells 256
Delay Time tpd(1) Max 7.5 ns
Operating Temperature -40degC ~ 105degC (TJ)
Supplier Device Package 176-TQFP (24x24)
Voltage Supply - Internal 3V ~ 3.6V
Number of Logic Elements/Blocks 16

Getting Started

Design entry is typically performed using Lattice Diamond or ispLEVER Classic software, supporting VHDL and Verilog synthesis. Hardware programming is achieved via a standard JTAG interface using a Lattice USB programming cable. For evaluation, look for ispMACH 4000V family development kits or reference designs that target the 176-pin TQFP footprint.

Also Consider

EPM240T100I5N Intel / Altera - A MAX II CPLD with a non-volatile architecture that provides comparable logic density in a smaller 100-pin TQFP package.
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