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AC206KQM

更新时间： 2024-01-10 02:49:54
品牌 Logo 应用领域
博通 - BOARDCOM 局域网（LAN）标准
页数 文件大小 规格书
70页 798K
描述
2.5V 10/100-TX 5-Port Repeater with Integrated Bridge

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AC206KQM 数据手册

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PRELIMINARY DATA SHEET  
AC206  
2.5V 10/100-TX 5-Port Repeater with Integrated Bridge  
G E N E R A L D E S C R I P T I O N  
F E A T U R E S  
The AC206 is an unmanaged five-port 10/100 Mbps  
repeater with an integrated bridge. The AC206 provides a  
low-cost, integrated solution for unmanaged repeater  
applications.  
• Patent-pending DC restoration technique reduces offset/  
baseline wander.  
• IEEE 802.3u-compliant auto-negotiation.  
• Unique scrambler seed for all port for better EMI.  
The AC206 is a Class II Repeater. The device provides five  
10/100 Mbps copper media ports. The AC206 also provides  
one selectable MII/seven-wire interface. The MII/seven-  
wire interface can be connected to a MAC.  
• Supports Media Independent Interface (MII) or seven-  
wire interface to connect to MAC.  
• Cascadable backplane compatible with AC208.  
• Non-blocking 10/100M bridge with MAC controller and  
switching engine. One segment of a bridge is fixed to  
100 Mbps, while the other can be configured for 10 or  
100 Mbps.  
The AC206 provides 10/100 Mbps auto-negotiation and  
parallel detection for all ports. The option to configure the  
device for each port via EEPROM interface is available. The  
AC206 provides two internal repeater state machines, one  
operates at 10 Mbps and the other at 100 Mbps. When the  
technology is set, the device automatically connects each  
port to the appropriate repeater segment.  
• Bridge functions include:  
- Embedded 32 KB memory for address table and  
packet buffer.  
The AC206 provides two backplanes for expansion, one  
operates at 10 Mbps and the other at 100 Mbps. Up to 20  
ports can be connected into one repeater using backplane  
buses.  
- Local MAC address filtering.  
- XOR hashing scheme.  
- Short routing decision time.  
- Forwarding schemes: store-and-forward.  
- Address table up to 1K entries.  
The AC206 integrates repeater and bridge technologies  
with store-and-forward forwarding mechanisms.  
• Programmable LED display for activity, link, speed,  
F E A T U R E S  
partition, utilization, and collision rate.  
• Advanced power management includes:  
• Low-power (less than 1A total current consumption when  
used with 1.25:1 transformer) five-port 10/100 Mbps  
repeater with built-in bridge function.  
- Each transceiver port can be turned off  
independently.  
- Standby mode, which reduces power when the port  
is not connected.  
• MDC/MDIO for control/status of transceiver components.  
• Five integrated 10/100 Mbps IEEE 802.3u compliant  
• Low-power 2.5V 0.25 µm CMOS implementation with  
transceivers.  
128-pin QFP package.  
• Fully integrated adaptive equalizer provides phase/  
amplitude compensation for various cable lengths up to  
30 dB at 100 MHz.  
• Input tolerance to 3.3V.  
T o R v -M II  
2 5 6 K b its  
R A M  
B rid g e  
M II  
M II  
1 0 M R B P  
1 0 0 M R B P  
R _ 1 0 0  
R _ 1 0  
. . .  
. . .  
1 0 M  
1 0 0 M  
M II  
1 0 M R B P  
R B P  
1 0 0 M R B P  
M U X  
M II/  
7 -W ire /  
R v -M II  
M
U
X
7 W ire  
P
H
Y
P
H
Y
P
H
Y
P
H
Y
P
H
Y
R v -M II  
(T X 0 )  
(T X 1 )  
(T X 2 )  
(T X 3 )  
(T X 4 )  
U p L in k  
Figure 1: Functional Block Diagram  
AC206-DS05-405-R  
16215 Alton Parkway • P.O. Box 57013 • Irvine, California 92619-7013 • Phone: 949-450-8700 • Fax: 949-450-8710 07/08/02  
1234567...70

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