Intel FW82801DBSell Excess Inventory

Part No.:: FW82801DB

Manufacturer:: Intel

Category:: Specialized ICs

Package:: 421-BGA, FCBGA

Datasheet:: FW82801DB.pdf

Description:: IC CONTROLLER 421-MICROBGA

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FW82801DB: Intel® ICH4 Southbridge for Desktop & Embedded Platforms

The Intel® FW82801DB, often referred to as the ICH4 I/O Controller Hub, is a Southbridge chipset designed for Pentium® 4 class desktop and embedded systems. It aggregates storage, USB, audio, networking and legacy I/O into a single device, providing a stable and cost-effective backbone for motherboards built in the early 2000s and for today's long-life and repair markets.

Product Introduction

The FW82801DB is part of Intel's ICH4 family of Southbridge chips used together with Pentium® 4 processors and companion Northbridge controllers. Acting as the system I/O hub, it manages connections to USB ports, IDE storage, PCI slots, onboard audio and networking devices, allowing motherboard designers to implement a full desktop feature set with a single, well-proven chipset solution.

Compared with earlier generations, the FW82801DB introduced support for USB 2.0, enhanced integrated audio and improved power-management capabilities. These enhancements enabled higher-bandwidth peripherals, more responsive multimedia experiences and better overall system efficiency while maintaining compatibility with existing operating systems and software ecosystems.

Although the FW82801DB has been discontinued and superseded by newer platform controllers, it remains important for the maintenance of legacy PC systems, industrial computers and specialized equipment that still depend on Intel® 845/865-era architectures. For repair centers, refurbishers and long-lifecycle OEM products, sourcing genuine FW82801DB devices is essential to keep installed systems operating reliably.

Key Benefits

Proven Desktop Platform Foundation

The FW82801DB was a cornerstone of many mainstream Pentium® 4 motherboard designs. Its long field history and broad OS support make it a dependable choice for maintaining or extending existing desktop and embedded platforms based on early-2000s Intel® architectures.

Rich I/O & Connectivity

By integrating USB, IDE, PCI, audio, LAN and legacy interfaces, the chipset reduces the number of external controllers required on the board. This high level of integration simplifies PCB layout, lowers component count and helps keep overall system cost under control.

USB 2.0 & Multimedia Support

Support for USB 2.0 significantly increases peripheral bandwidth compared to USB 1.1, enabling faster external storage and modern human-interface devices. Combined with integrated AC'97 audio, the FW82801DB delivers a capable multimedia feature set for mainstream PCs and embedded systems of its generation.

Long-Term Availability for Legacy Systems

Many industrial and specialized installations still rely on motherboards built around the FW82801DB. Continued sourcing of this chipset allows repair centers and OEMs to extend the service life of deployed equipment without redesigning the entire platform, saving time and engineering effort.

Technical Features

I/O Controller Hub Architecture

The FW82801DB operates as the ICH4 Southbridge, connecting to the Northbridge via Intel's hub interface. It consolidates control of storage, PCI expansion, USB, audio and legacy devices, reducing latency and improving data throughput between the CPU, memory and peripheral subsystems.

Integrated Controllers

The chipset supports up to six USB ports with USB 2.0 compliance, a 10/100 Ethernet MAC (when paired with the appropriate PHY), AC'97 audio, and multiple PCI devices. This mix of controllers provides all the essential functions required for desktop-class motherboards and many embedded designs.

Storage & Expansion Interfaces

The FW82801DB includes two IDE channels for PATA hard drives and optical drives, along with support for up to six PCI slots (32-bit/33 MHz). Although native SATA support is not provided, many platforms combine the chipset with discrete SATA controllers to add modern storage options while preserving compatibility with legacy IDE devices.

Technical Specifications

Parameter	Value / Condition
Product Collection	Intel® 840 Series / ICH4-based Chipsets
Code Name	Products formerly ICH4
Marketing Status	Discontinued
Launch Timeframe	Circa 2002–2003 (Pentium® 4 era)
TDP	Approx. 2.2 W typical
Embedded Options Available	Yes, used in desktop and embedded boards
PCI Support	Up to 6 slots (32-bit / 33 MHz)
USB Revision & Ports	USB 2.0, up to 6 USB ports
Integrated LAN	10/100 Ethernet MAC (with external PHY)
Integrated IDE	2 IDE channels (PATA); no native SATA ports
Audio Technology	AC'97 audio controller; no Intel® HD Audio support
Maximum Case Temperature (T_CASE)	Up to approximately 110 °C (per Intel guidelines)

Equivalent & Manufacturer Information

Equivalent / Related Chipsets

The FW82801DB is part of a broader family of Intel® ICH Southbridge devices. Depending on the target platform and feature requirements, designers and repair engineers may also consider:

82801DBM – mobile variant of the ICH4
82801EB / 82801ER – ICH5 generation with SATA support
82801FB / 82801FR – later ICH6 series used with newer chipsets

When selecting an alternative, it is important to verify compatibility at the chipset and motherboard level; in many cases, drop-in replacement is not possible without redesigning both the Northbridge and board layout.

About the Manufacturer – Intel

Intel Corporation is one of the world's leading semiconductor companies, known for its microprocessors, chipsets, graphics and a wide portfolio of computing solutions. Intel platforms have powered a large share of desktop PCs, notebooks, servers and embedded systems over several decades.

The FW82801DB reflects Intel's long experience in platform-level design, combining performance, compatibility and integration in a single Southbridge device that has been deployed in millions of systems worldwide.

Application Field

Mainstream Desktop Motherboards

Originally used with Pentium® 4 processors and AGP graphics, the FW82801DB served as the I/O hub for consumer and business PCs requiring USB 2.0, IDE storage, integrated audio and PCI expansion slots.

Embedded & Industrial PCs

Many embedded PC boards and industrial controllers leveraged the FW82801DB for long-lifecycle applications, thanks to its combination of legacy interfaces, PCI expansion and robust operating behavior in demanding environments.

Legacy System Maintenance

OEMs and repair centers continue to use FW82801DB devices to service existing equipment, including test instruments, production machinery and specialized IT systems that still rely on Intel® 845/865-class platforms.

Education & Laboratory Platforms

Older PC architectures based on the FW82801DB are still found in training labs and educational environments, where they provide a practical platform for learning about classical PC chipset design, bus architectures and legacy operating systems.

Disclaimer

The technical information and application guidance provided for the FW82801DB are based on publicly available Intel® documentation and typical industry practice. Actual system behavior depends on motherboard design, component selection, BIOS implementation and operating conditions. Engineers should always consult the original Intel datasheets and design guides and validate performance in their own hardware before using this chipset in production or repair work.

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