Lattice Semiconductor Corporation LC4256B-5TN176I

Mfr. Part

LC4256B-5TN176I

Manufacturer

Lattice Semiconductor

Y-IC is a quality distributor for Lattice Semiconductor products. We focus on genuine parts, fast delivery, and expert support to give you the best products and services

Detailed Description

256-macrocell CPLD from the ispMACH 4000B series

5 ns typical pin-to-pin delay for fast logic paths

176-pin TQFP or LQFP package with 24 mm x 24 mm body size

Industrial temperature range, TJ -40°C to +105°C

In-System Programmable via standard JTAG

Core supply 2.3 V to 2.7 V

128 user I/O pins and 16 logic blocks

Surface-mount, tray packaging

Base product number LC4256

Key Features

256 macrocells for medium-complexity glue logic, control, and interfacing

128 I/O for wide external connectivity

5 ns max tpd for low-latency signal paths

In-System Programmable through JTAG for quick updates and field reconfiguration

ispMACH 4000B architecture with predictable timing and robust design tools

Industrial temperature operation for harsh environments

Surface-mount 176-TQFP or LQFP footprint

Core voltage 2.3 V to 2.7 V with typical 3.3 V I/O support

Stable, mature toolchain and documentation

Key Advantages

Fast timing and consistent performance for control and interface logic

Simple to program and reprogram in-system, reducing maintenance time

Wide I/O count simplifies complex board-level interconnects

Industrial-grade reliability and temperature capability

Proven Lattice architecture with broad ecosystem and long production history

Lower power core supply compared to older-generation CPLDs

Easy assembly with standard QFP processes and common pitch

Cost-effective replacement for older CPLDs in legacy systems

Packaging

Type: 176-pin TQFP or LQFP, surface mount

Material: Molded epoxy body with copper leadframe, lead-free finishes available per datasheet

Size: 24 mm x 24 mm body footprint, low-profile QFP form factor

Pin configuration: 176 total pins with 128 user I/O; remaining pins for VCCINT, VCCIO, GND, JTAG (TDI, TDO, TCK, TMS), configuration, and dedicated control pins

Typical lead pitch: industry-standard fine-pitch QFP (check datasheet for exact pitch)

Thermal characteristics: TJ -40°C to +105°C; thermal performance depends on PCB design, copper area, and airflow; follow datasheet and application notes for θJA guidance

Electrical properties: core supply 2.3 V to 2.7 V; max pin-to-pin delay 5 ns; in-system programmable JTAG; I/O voltage support per datasheet; ESD and latch-up ratings per Lattice specifications

Lifecycle

Status: Active based on latest available information for ispMACH 4000B devices

Not currently flagged as nearing discontinuation; confirm latest status on our website or with Y-IC sales

Equivalent and alternative models

- Same family and similar function

- LC4256B-7TN176I slower speed grade, same package and temperature range

- LC4256B-10TN176I slower speed grade, same package and temperature range

- LC4256B-5TN176C commercial temperature variant of this part

- LC4256B devices in other pin counts or packages may fit some designs but are not pin-compatible

- Lattice next-generation migration options

- MachXO2 family, example densities MachXO2-640, MachXO2-1200 (different architectures and packages; verify voltage and pinout)

- MachXO3 family, example densities MachXO3L-690, MachXO3L-940 (different architectures and packages; verify voltage and pinout)

- Cross-vendor alternatives for comparable CPLD functionality

- AMD Xilinx CoolRunner-II XC2C256 (available in QFP packages; check voltage, I/O, and timing differences)

- Intel Altera MAX V 5M240 or 5M570 (different architecture and packages; check compatibility)

- Microchip Atmel ATF1508 family for medium-density CPLD needs (different pinout and voltage; check suitability)

If you need exact pin-compatible replacements or lifecycle confirmation, please contact our sales team via the Y-IC website for the latest guidance and vetted substitutions

Key Application Areas

Industrial control and automation, motor control, sensor interfacing

Communication interfaces and protocol bridging

Glue logic, bus interfacing, and timing control between subsystems

Power management sequencing and system reset control

Consumer and professional electronics needing fast, deterministic logic

Legacy CPLD replacement in maintenance and extended-life programs

Embedded systems state machines, arbitration, and address decoding

Datasheet

Y-IC provides the most authoritative datasheet and documentation for LC4256B-5TN176I on our product page

Download the datasheet directly from this page for precise pinout, electrical limits, timing, programming, and mechanical drawings

Request for Quotation Now

In stock and ready to ship, quantity available 2616 units

Get a Quote on our website now for best pricing and lead time

Learn More and download the datasheet to speed up your design

Limited Time Offer for bulk orders and preferred customers

Visit Y-IC and request your quote today to secure supply and support