KU80386SXTA40

The KU80386SXTA40 is an Intel i386-series microprocessor implementing the 80386 core architecture. It provides a full 32-bit internal architecture while operating with a 16-bit external data bus and a 24-bit external address bus, making it suitable for entry-level embedded systems that require 32-bit programming model compatibility on cost-effective 16-bit hardware.

Designed for commercial-grade embedded applications, the device includes integrated memory management features, support for an external math coprocessor, on-chip debugging support, and a surface-mount package optimized for system integration and development.

Key Features

• Core & Architecture Full 32-bit internal architecture based on the 80386 core with 8 general-purpose 32-bit registers and support for 8/16/32-bit data types.
• External Bus & Pipelining High-performance 16-bit external data bus and 24-bit external address bus with address pipelining and two-clock bus cycles to allow use of slower memories while maintaining system throughput.
• Memory Management Integrated Memory Management Unit (MMU) with optional on-chip paging, four levels of hardware-enforced protection, virtual memory support and virtual 8086 mode.
• Software Compatibility Object-code compatible with 8086, 80186, 80286 and Intel386 processors and capable of running the same applications and operating systems as Intel386 DX-class processors.
• Coprocessor Support Numerics support via an external 80387 floating-point/math coprocessor.
• On-Chip Debugging Built-in debugging support including breakpoint registers to aid system bring-up and development.
• Package & Mounting Surface-mount 100-pin plastic quad flatpack package for compact PCB implementations and reliable assembly.
• Operating Range & Grade Commercial-grade device rated for an operating temperature range of 0°C to 70°C.
• Environmental Compliance RoHS compliant.

Typical Applications

• Entry-Level Embedded Systems Implement 32-bit software stacks on cost-sensitive, 16-bit hardware platforms while retaining a uniform programming model.
• Legacy System Development Support and migrate existing Intel386-class applications and operating systems in new hardware designs.
• Industrial Control & Instrumentation Use integrated MMU and protection features to build protected, paged systems for control and monitoring tasks.
• System Development & Debugging Leverage on-chip debugging and breakpoint registers during firmware and system bring-up.

Unique Advantages

• 32-Bit Internal Architecture with 16-Bit I/O Delivers the programming benefits of a 32-bit CPU while enabling cost-efficient 16-bit external hardware designs.
• Integrated MMU and Virtual Modes Built-in paging, protection levels and virtual 8086 mode simplify implementation of virtual memory and protected environments.
• Software-Level Compatibility Object-code compatibility across earlier Intel x86 generations reduces software porting effort and preserves legacy investments.
• External Floating-Point Support Support for an external 80387 coprocessor enables hardware-accelerated numeric operations where required.
• Development-Friendly Debugging On-chip breakpoint registers and testability features accelerate system debug and validation.
• RoHS Compliant Commercial Offering Complies with RoHS requirements and is specified for commercial temperature ranges for mainstream embedded applications.

Why Choose KU80386SXTA40?

The KU80386SXTA40 positions itself as a practical solution for designers needing 32-bit software compatibility in cost-sensitive embedded platforms. With an integrated MMU, support for an external math coprocessor, and on-chip debugging, it streamlines development of protected and paged systems while maintaining compatibility with established Intel386 software and toolchains.

This commercial-grade, surface-mount microprocessor suits development teams and OEMs building entry-level embedded controllers, legacy system upgrades, and industrial applications that require a balance of software compatibility, integration, and predictable operating-temperature performance.

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