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AC206-DS02-R 数据表(PDF) 1 Page - Broadcom Corporation. |
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AC206-DS02-R 数据表(HTML) 1 Page - Broadcom Corporation. |
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1 / 70 page  PRELIMINARY DATA SHEET AC206 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 2.5V 10/100-TX 5-Port Repeater with Integrated Bridge Figure 1: Functional Block Diagram GENERAL DESCRIP T ION FE 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. 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. 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. 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. The AC206 integrates repeater and bridge technologies with store-and-forward forwarding mechanisms. FE A T U R E S • 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. • MDC/MDIO for control/status of transceiver components. • Five integrated 10/100 Mbps IEEE 802.3u compliant transceivers. • Fully integrated adaptive equalizer provides phase/ amplitude compensation for various cable lengths up to 30 dB at 100 MHz. • Patent-pending DC restoration technique reduces offset/ baseline wander. • IEEE 802.3u-compliant auto-negotiation. • Unique scrambler seed for all port for better EMI. • 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. • Bridge functions include: - Embedded 32 KB memory for address table and packet buffer. - Local MAC address filtering. - XOR hashing scheme. - Short routing decision time. - Forwarding schemes: store-and-forward. - Address table up to 1K entries. • Programmable LED display for activity, link, speed, partition, utilization, and collision rate. • Advanced power management includes: - Each transceiver port can be turned off independently. - Standby mode, which reduces power when the port is not connected. • Low-power 2.5V 0.25 µm CMOS implementation with 128-pin QFP package. • Input tolerance to 3.3V. MU X R _10 0 R _10 Br id g e 10 M 10 0M . . . . . . P H Y 7W ir e MII MII RB P M U X M II/ 7- W ir e / Rv - M I I 25 6K b i t s RAM MII P H Y P H Y P H Y P H Y (T X 4 ) U p Li nk (T X 3 ) (T X 2 ) (T X 1 ) (T X 0 ) Rv - M I I To R v - M I I 1 00M R B P 10 0M R B P 10M R B P 10 M R B P |
类似零件编号 - AC206-DS02-R |
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类似说明 - AC206-DS02-R |
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