Lattice Semiconductor Corporation LC4256B-75T100I

Mfr. Part

LC4256B-75T100I

Manufacturer

Lattice Semiconductor. Y-IC is a quality distributor of Lattice Semiconductor. We focus on delivering genuine parts, fast service, and the best support to help you build with confidence.

Detailed Description

256‑macrocell CPLD from the ispMACH 4000B series. In‑system programmable via JTAG. 7.5 ns max propagation delay. 100‑pin TQFP (14 x 14 mm) package. Industrial temperature range −40°C to 105°C (TJ). Surface‑mount. Internal core supply 2.3 V to 2.7 V. 64 user I/O pins and 16 logic blocks. RoHS non‑compliant variant. Base product number LC4256. Package type Tray. Category: Integrated Circuits (ICs) → Embedded CPLDs (Complex Programmable Logic Devices). Available quantity: 2672.

Key Features

In‑system programmable (ISP) using standard JTAG (IEEE 1149.1)

Non‑volatile technology for instant‑on and configuration retention

256 macrocells organized into 16 logic blocks

7.5 ns max tpd for fast, predictable timing

64 flexible I/O pins with support for common 2.5 V/3.3 V logic standards

Multiple global clocks and control nets for clean design timing

Industrial temperature rating (−40°C to 105°C TJ)

2.3 V to 2.7 V internal core supply for lower power

100‑pin TQFP footprint, easy SMT assembly

Supported by Lattice design tools and standard JTAG programmers

Key Advantages

Fast time‑to‑market with easy in‑system reprogramming

Stable, deterministic timing simplifies design closure

Non‑volatile, instant‑on behavior removes need for external configuration memory

Broad I/O standard support reduces glue logic and BOM

Industrial temp range improves reliability in harsh environments

Pin‑compatible options within the ispMACH 4000B family enable easy speed/temperature/package changes

Proven Lattice ecosystem and tools for development and test

Packaging

Type: 100‑pin TQFP (also referenced as 100‑LQFP); body size 14 x 14 mm; packaged in Tray

Material: Molded epoxy plastic package with copper‑based leadframe and tin lead finish (typical for TQFP)

Pin pitch: 0.5 mm (typical for 100‑pin TQFP)

Pin configuration: 64 programmable I/O pins; dedicated JTAG pins (TDI, TDO, TMS, TCK); multiple global clock/control pins; power and ground pins distributed for signal integrity

Thermal characteristics: Junction temperature −40°C to 105°C (TJ); thermal performance depends on PCB layout and airflow (use the datasheet for θJA guidance and derating)

Electrical properties: Internal core supply 2.3 V to 2.7 V; tpd max 7.5 ns; ISP via JTAG; I/O supports common 2.5 V/3.3 V standards; RoHS status: non‑compliant

Lifecycle

Status: This is a mature device family. RoHS non‑compliant variants can have limited availability and may be approaching last‑time‑buy in some regions. Availability can change; check with us for current stock and lead times.

Equivalent or alternative models (same family, verify exact pinout, voltage, and temperature):

- LC4256B‑5T100I (faster speed grade)

- LC4256B‑10T100I (lower speed grade)

- LC4256B‑75T100C (commercial temperature)

- LC4256B in alternate 100‑pin LQFP/TQFP options (package code variations)

- Lower/higher density, same series (for pin‑compatible options in some designs): LC4128B, LC4032B (check I/O count and pin mapping)

If you need RoHS‑compliant or low‑power alternatives, or exact cross‑references, please contact our sales team through our website and we will match the best drop‑in or near‑equivalent option for your design.

Key Application Areas

Glue logic consolidation and bus interfacing (PCI‑like, memory, and peripheral buses)

Finite state machines, address decoding, and control sequencing

I/O expansion, LED/keypad control, and panel/interface control

Protocol bridging and custom serial interfaces (SPI, I2C, UART)

Industrial controls, instrumentation, and sensor hubs

Power‑up sequencing and system management logic

FPGA companion logic for offloading simple fixed functions

Datasheet

Our website hosts the most authoritative datasheet and technical resources for LC4256B‑75T100I. For the latest specifications, pinouts, timing, and design guidelines, download the datasheet directly from this page.

Request for Quotation Now

Get a Quote today on our website. Learn More and secure inventory while supplies last. Limited Time Offer—act now to lock in pricing and delivery.