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AC207-DS04-405-R Datasheet(PDF) 1 Page - Broadcom Corporation. |
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AC207-DS04-405-R Datasheet(HTML) 1 Page - Broadcom Corporation. |
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1 / 60 page  ADVANCE DATA SHEET AC207 2.5V 10/100-TX 8-Port Repeater with Integrated Bridge AC207-DS04-405-R 16215 Alton Parkway • P.O. Box 57013 • Irvine, California 92619-7013 • Phone: 949-450-8700 • Fax: 949-450-8710 07/08/02 GENERAL DESCRIP T ION The AC207 is an unmanaged 8-port 10/100-Mbps repeater with an integrated bridge. The AC207 provides a low-cost and integr ated solut i on fo r unmanage d repe ater applications. The AC207 is a Class II Repeater. The device provides eight 10/100-Mbps copper media ports. The AC207 also provides one selectable MII/7-wire interface. The MII/7-wire interface can be connected to a MAC. The AC207 provides 10/100-Mbps auto-negotiation and parallel detection for all ports. However, the option to configure each transceiver port via EEPROM interface is available. The AC207 provides two internal repeater state machines, one operating at 10 Mbps and the other at 100 Mbps. Once the technology is set, the device automatically connects each port to the appropriate repeater segment. The AC207 integrates repeater and bridge technologies with store-and-forward forwarding mechanisms. FE A T U R E S • Low power (<1A total current consumption when used with 1.25;1 transfor mer) eight por t 10/100-Mbps repeater with built-in bridge function. • MDC/MDIO for control/status of transceiver compo- nents. • Eight integrated 10/100-Mbps IEEE 802.3u compliant transceivers. • Fully integrated adaptive equalizer provides phase/ amplitude compensation for various cable lengths up to 30dB @ 100 MHz. • Patent-pending DC restoration technique reduces off- set/baseline wander. • IEEE 802.3u-compliant auto-negotiation. • Unique scrambler seed for all port for better EMI. • Supports in the 9th ports for media independent inter- face (MII) or 7-wire interface to connect to MAC. • Non-blocking 10/100M bridge with MAC. One segment of a bridge is fixed to 100 Mbps while the other seg- ment can be configured for 10 or 100 Mbps. • Bridge functions include: - Embedded 32K bytes 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, par- tition, utilization, and collision rate. • Advanced power management includes: - Each transceiver port can be turned off indepen- dently. - 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 Figure 1: Functional Block Diagram MU X P H Y R _100 R _10 B r i dge 10 M 10 0M . . . . . . P H Y P H Y P H Y 7W i r e MI I MI I RB P M U X MI I / 7- W i r e 256K b i t s RAM MI I T X 0 T X1 T X 2 T X7 P H Y TX 3 P H Y TX 4 P H Y TX 5 P H Y TX 6 100 M R B P 10 M R B P |
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