The Altima AC205 is a highly integrated 0.25u CMOS silicon

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

bridged repeater, including PHY transceivers, an MII or 7-wire

hard-wire configurable interface, two internal repeaters, and a

two-port bridge with 32 KB embedded memory.

The AC205 contains five 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 MII and 7-wire compatible MAC interface allows the

AC205 to be designed into many different applications, reducing

the number of separate devices necessary to meet multiple design

requirements.

The AC205 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 AC205

offers the obvious advantage of cost savings in the discrete

memory device. Additionally, a 100-pin PQFP package means

savings in manufacturing and testing.

Because the AC205 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 AC205 provides the lowest

overall system cost and most reliable design.

The AC205 is a member of the AC208 Product Family. The

AC208 Product Family includes the AC208, AC207, AC206,

AC205 and AC205-I 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

AC205

OVER VIEW

. . .

. . .

MUX

R_100

R_10

Bridge

10M/1b

100M/5b

100M/5b

10M/1b

P

H

Y

7 Wire

MII

MII

RBP

M

U

X

MII/

7-Wire

32 KB

RAM

MII

P

H

Y

P

H

Y

P

H

Y

P

H

Y

(TX4)

(TX3)

(TX2)

(TX1)

(TX0)

© 2002 by ALTIMA COMMUNICATIONS, INC.

A Broadcom Company. All rights reserved.

AC205-PB03-R-11.01.02

ALTIMA COMMUNICATIONS, INC.

16215 Alton Parkway, P.O. Box 57013

Irvine, California 92619-7013

ALTIMA COMMUNICATIONS, INC. CONFIDENTIAL

AC205 Block Diagram

• Integrated PHY, Repeater and Bridge

• Integrated Packet Buffer Memory

• Integrated 1K MAC

• Programmable LEDs via EEPROM

• MII or Reversed MII or 7-wire Interface