DS04

GENERAL DESCRIPTION

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/sevenwire interface can be connected to a MAC.

FEATURES

• 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 sevenwire 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.