The Altima AC208 is a highly integrated 0.25u CMOS silicon

solution. It combines all the functions of a 10/100 dual-speed

bridged repeater including PHY transceiver, two internal

repeaters, two repeater backplane busses for expansion, a two-

port bridge with 32 KB embedded memory.

The AC208 contains eight 10BASE-T/100BASE-TX Fast

Ethernet transceivers, one of which can be configured into a full-

duplex uplink port. The transceivers perform all of the physical

layer interface functions for 10BASE-T Ethernet on Category 3,

4, or 5 unshielded twisted pair (UTP) cable and 100BASE-TX

Fast Ethernet on Category 5 UTP cable.

The AC208 represents a marked improvement over the previous

generation of the dual-speed bridged repeater family AC108R.

Because the memory is embedded in the silicon, the AC208

offers the obvious advantage of cost savings in the discrete

memory device. Additionally, a 128-pin PQFP package means

savings in manufacturing and testing.

Because the AC208 has the smallest footprint and the lowest

power consumption, on a per-port basis, of any micro-LAN

solution, when all system costs are considered — power, heat,

components and real estate — the AC208 provides the lowest

overall system cost and most reliable design.

The AC208 product family includes the AC208, AC207, AC206,

AC205 and AC205i with the following features and

configurations:

• AC208:

128-pin

PQFP,

eight-port

TX

with

cascadable backplane

• AC207: 128-pin PQFP, eight-port TX with MII or 7-wire

• AC206: 128-pin PQFP, five-port TX with MII or reversed MII

or 7-wire, cascadable repeater backplane

• AC205: 100-pin PQFP, five-port TX with MII or 7-wire

• AC205i: 100-pin PQFP, five-port TX with MII or 7-wire and

single independent TX port for IP phone

AC208

OVER VIEW

. . .

. . .

MUX

R_100

R_10

Bridge

10M

100M

100M RBP

10M RBP

P

H

Y

MII

MII

RBP

32 KB

RAM

P

H

Y

P

H

Y

P

H

Y

P

H

Y

TX4

TX3

TX2

P

H

Y

P

H

Y

P

H

Y

TX7

Up Link

TX6

TX5

TX1

TX0

10M RBP

100M RBP

© 2002 by ALTIMA COMMUNICATIONS, INC.

A Broadcom Company. All rights reserved.

AC208-PB03-R-11.01.02

ALTIMA COMMUNICATIONS, INC.

16215 Alton Parkway, P.O. Box 57013

Irvine, California 92619-7013

ALTIMA COMMUNICATIONS, INC. CONFIDENTIAL

AC208 Block Diagram

• Integrated PHY, Repeater and

Bridge

• Integrated Packet Buffer Memory

• Integrated 1K MAC

• Programmable LEDs via EEPROM

• Backplane for Cascading