
Advanced 11/5/98
xDSL WAN Ethernet Bridge
Controller
MB86976
Description
The Fujitsu MB86976 xDSL WAN Ethernet Bridge
Controller is a CMOS VLSI device designed for LAN-WAN
bridging applications. It offers a high level of integration that
provides flexibility and seamless integration of 10 Mbps
Ethernet over xDSL for Small Office Home Office (SOHO)
access. The MB86976 is a multi-protocol data
communications controller that supports two channels. It
accepts LAN packets directly through its on-chip 10 Mbps
Ethernet Media Access Controller (MAC) and it accepts a
WAN serial bit stream (PPP, PPP-LEX or HDLC) with a bit
rate of up to 8.2 Mbps. It provides LAN-to-WAN and WAN-
to-LAN translation between LAN packets and the WAN serial
bit stream. The MB86976 includes a hardware-based
advanced MAC address filter and programmable features to
accept or reject packets meeting user-defined data patterns,
thus accelerating complex, bridging, routing, and firewall
capabilities to wire speed. The MB86976 is ideally suited for
building xDSL-ready Ethernet remote routers and modem
equipment.
The highly integrated MB86976 device also supports system
designs with standard interfaces. The processor interface
supports 8- and 16-bit, multiplexed and non-multiplexed bus,
microcontrollers from Intel, Philips, and Siemens. The
MB86976 also interfaces to industry-standard 70 ns fast page
mode 256Kx16 DRAMs, standard 10 Mbps Ethernet
Transceivers (such as Fujitsu's MB86961A Universal Interface
for 10Base-T or AUI for10Base-2 networks) and standard
DMT (Discrete Multitone) or CAP (Carrierless Amplitude
and Phase) xDSL modem chip sets.
To further ease integration of the MB86976 into a board-level
product, designer kits are available.
Package
144-pin, plastic QFP
FPT-144P-M03