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A C 2 0 5 F E A T U R E S
AC205
MII
7-wire
CPU
...5...
AC205 Application with AC208 System Block Diagram
AC205 is a member of the AC208 product family, with
the same architecture and fabrication technology.
Other members in the product family include AC208,
AC207, AC206 and AC205i.
Provides easy product migration.
Provides seamless integration for WAN connections
and system expansion.
Provides lowest overall cost and form factor for 10/100
repeater hub design and SOHO gateway and router
design.
Utilizes field-proven, industry-standard 10BASE-T/
100BASE-TX Fast Ethernet transceivers to lower
overall system interoperability and reliability risks.
Integrated memory reduces component cost and
manufacturing and testing costs.
Low power consumption and low heat dissipation
allow high design density and low system cost.
EEPROM-configured system parameter enables cost-
sensitive architecture.
Configurable MII or 7-wire interface allows versatile
application with WAN connectivity.
S U M M A R Y O F B E N E F I T S
5-PORT ULTRA LOW POWER 10/100 ETHERNET BRIDGED REPEATER
PRODUCT
PRODUCT
Brief
Brief
A C 2 0 5
The highest level of silicon integration achieved for a
five-port 10/100 bridged repeater
The AC205 integrates:
Five transceivers of 10BASE-T/100BASE-TX
10M repeater
100M repeater
Two-port bridge including:
- 32 KB memory for address table and packet buffer
- Local MAC address filter
- Address table up to 1K entries
MII or 7-wire port
Fully compliant auto-negotiation
Very small package 100-pin PQFP
280 sq. mm footprint
Very low power typical < 1.2W
Selectable TX drivers for 1:1 or 1.25:1 transformers to enable
additional power reduction
Cable detect mode typical < .20W
Power down mode typical < .05W
ALTIMA COMMUNICATIONS, INC. CONFIDENTIAL
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
A C 2 0 5 O V E R V I E W
. . .
. . .
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