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MDS108AL
MDS108 Unmanaged 9-Port 10/100 Mbps Ethernet Switch Data Sheet Features November 2003 • 8 10/100 Mbps auto-negotiating RMII ports • 1 10/100 Mbps auto-negotiating MII/serial port (port 8) that can be used as a WAN uplink or as a 9th port • 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 - XLink expansion MII port (port 8) - Input ports are defined to be high or low priority - Operates at 100/200/300/400 Mbps - Allows explicit identification of IP phone ports External I2C EEPROM for power-up configuration • Supports both full and half duplex ports - • • 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 • - Auto address learning Auto address aging 256 KB or 512 KB (1 chip) - Provides back-pressure for half duplex - 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 - Packet scheduling based on Weighted Round Robin (WRR) and Weighted Random Early Detection/Drop (WRED) • Special power-saving mode for inactive ports • Ability to support WinSock 2.0 and Windows2000 smart applications - With flow control disabled, can drop packets during congestion using WRED • Transmit delay control capabilities • 2 queues per output port - 2 levels of packet drop provided - 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 Zarlink Semiconductor Inc. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 2003, Zarlink Semiconductor Inc. All Rights Reserved.
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