Intel FW82801DB

Intel 82801DB consolidates legacy and high-speed peripheral interfaces for compatible computer platforms. The controller connects to a matching memory-controller hub through the hub interface and provides local buses, storage, USB and firmware interfaces. This is a board-level chipset component, not a standalone peripheral or a generic drop-in BGA.

• Six USB ports controlled by three UHCI blocks and one EHCI high-speed USB 2.0 block.
• Independent primary and secondary IDE channels for up to four drives.
• Integrated PCI, LAN, AC'97, LPC and SMBus platform interfaces.
• ACPI 2.0 power-management and legacy system-control functions.
• Compact 31 x 31 mm, 421-ball BGA footprint.

The Intel datasheet specifies a PCI Revision 2.2 bus at 33 MHz with up to 133 MB/s peak transfer and six master devices. The IDE controller supports Ultra ATA/100, /66 and /33 modes. The integrated LAN controller provides the LAN Connect Interface and 10/100 Mbit/s capability with external networking components. The AC-link supports AC'97 2.3 audio and telephony codecs. Additional blocks include interrupt and DMA controllers, firmware-hub and low-pin-count interfaces, SMBus 2.0, GPIO and real-time clock.

Intel specifies a 31 x 31 mm, 421-ball BGA for the 82801DB. The catalog field reads "421-BGA, FCBGA"; the 421-ball count and body size agree with Intel and distributor listings, but the precise FCBGA registry naming and local image mapping need reconciliation. The local 421-BGA JPG and package registry confirmation are missing. Use Intel's controlled mechanical drawing and ball map, not artwork, for layout.

Assembly checks

• Verify the 31 x 31 mm outline and ball pitch against the controlled drawing.
• Check ball orientation, land pattern and solder profile for the board.
• Match the exact stepping and markings to the target motherboard.

The 421-ball map assigns hub interface, PCI, IDE, USB, LAN-connect, AC-link, LPC, SMBus, GPIO, clock, reset and multiple power/ground domains. Intel's datasheet provides the authoritative ball-assignment tables. Do not substitute a similarly named ICH package or transfer positions from another ICH generation.

These are Intel 82801DB family features. Board compatibility and specific electrical limits require the exact stepping, datasheet revision and platform design files.

The catalog also contains FW82801EB, but its listed 460-BBGA package differs from the 421-ball FW82801DB. It is a comparison reference only, not a pin-compatible or approved replacement. Verify stepping, hub compatibility, firmware, power rails, ball map and rework conditions before specifying any alternative.

Intel's 82801DB ICH4 Datasheet is the primary technical source for the interfaces, power architecture, package and ball assignments described here. The exact FW82801DB order-code package is corroborated by current distributor catalog listings. Intel warns that characterized errata may affect device behavior; obtain the applicable specification update for the selected stepping.

• Service and maintenance of compatible ICH4-era motherboards.
• Legacy industrial or embedded PC platform repair.
• Controlled replacement in validated chipset designs.

Confirm original Intel markings, stepping, date code, provenance, ball condition and moisture-sensitive handling. The local catalog currently lists 26,390 units at USD 25.02, minimum quantity 12 and no price tiers. Current third-party exact-code offers vary widely: one listing shows 4,210 units at USD 1.1429, another 15,027 units at USD 3.780 for 12, and another 34,030 units at USD 27.11. These are seller claims, not authenticated stock; the catalog price and availability require procurement reconciliation before publication. Do not silently change inventory or pricing.

Confirm exact stepping and board compatibility, all power wells, Intel errata, BGA rework profile and ball assignments. The package registry/image is incomplete and distributor stock/prices conflict. Retain manual review and noindex status; do not publish until the missing JPG and commercial evidence are resolved.