MDS108
Unmanaged 9-Port 10/100 Mbps
Ethernet Switch
Data Sheet
Features
November 2003
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8 10/100 Mbps auto-negotiating RMII ports
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1 10/100 Mbps auto-negotiating MII/serial port
(port 8) that can be used as a WAN uplink or as a
9th port
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Ordering Information
MDS108AL
Operates stand-alone or can be cascaded with a
second MDS108 to reach 16 ports
208 Pin PQFP
-40°C to +85°C
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XLink expansion MII port (port 8)
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Input ports are defined to be high or low priority
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Operates at 100/200/300/400 Mbps
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Allows explicit identification of IP phone ports
External I2C EEPROM for power-up configuration
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Supports both full and half duplex ports
-
•
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Ports 0 & 1 can be trunked to provide a 200 Mbps
link to another switch or server
Default mode allows operation without external
EEPROM
•
Up to 8 port-based VLANs
•
•
Full wirespeed layer 2 switching on all ports (up to
2.679 M packets per second)
Port 7 can be used to mirror traffic from the other 7
ports (0-6)
•
•
Internal 1 K MAC address table
Utilizes a single low-cost external pipelined,
SyncBurst SRAM (SBRAM) for buffer memory
•
Flow control capabilities
•
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Auto address learning
Auto address aging
256 KB or 512 KB (1 chip)
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Provides back-pressure for half duplex
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Leading-edge Quality of Service (QoS)
capabilities provided based on 802.1 p and IP
TOS/DS field
802.3x flow control for full duplex
•
Supports external parallel port for configuration
updates
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Packet scheduling based on Weighted Round
Robin (WRR) and Weighted Random Early
Detection/Drop (WRED)
•
Special power-saving mode for inactive ports
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Ability to support WinSock 2.0 and Windows2000
smart applications
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With flow control disabled, can drop packets
during congestion using WRED
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Transmit delay control capabilities
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2 queues per output port
-
2 levels of packet drop provided
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Provides port-based prioritization of packets on
up to 4 ports
•
Assures maximum delay (< 1 ms)
Supports mixed voice/data networks
Optimized pin-out for easy board layout
Figure 1 - System Block Diagram
1
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Copyright 2003, Zarlink Semiconductor Inc. All Rights Reserved.
