1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver FEATURES AND SPECIFICATIONS The 1000Base-T RJ-45 Gigabit Ethernet SFP copper transceiver module is a high-performance integrated duplex data link for bi-directional communication over Category 5 copper cable. The hot-pluggable feature allows changing to and from another SFP-compatible module without having to remove system power. Serial ID is included. 74741 Molex’s RJ-45 SFP module provides multiple customerfriendly features. A link monitor detects loss of signals. The Serial ID allows individual identification of each SFP transceiver. An auto-power saving mode conserves energy. The centered RJ-45 modular jack conforms to a 1U rack for ease of installation, and its design allows side-by-side stacking for increased density. Features and Benefits ■ 1000Base-T compliant module meets IEEE802.3z, ab, u specifications and is SFP MSA compliant ■ Less than 1 Watt power requirement provides low heat output ■ Zinc backshells provide improved EMI performance ■ Auto-negotiation feature allows networking equipment to automatically determine and adjust to the required settings ■ Automatic MDI crossover eliminates the need for crossover cables or cross-wired (MDIX) ports ■ Bail latch provides ease of extraction Specifications Reference Information Packaging: Box Mates with: SFP Cage 73927 SFP Connector 74441 Applications ■ Networking ■ Switches ■ Routers Electrical Voltage: 3.3V Current: 285mA Power: 1 W max. Physical Diecast Backshell: Zinc PCB Thickness: .099mm (.039”) Operating Temperature: 0 to +70°C OVERVIEW MAC SFP Adapter SFP Host Interface SERDES TBI Serial Interface 1000Base-T Transceiver Serial Interface RJ-45 SFP 1000Base-T Application Transformer Switch Board RJ-45 FEATURES SFP Mode When the internal Gigabit Ethernet transceiver (PHY) is configured to SFP mode, the PHY interfaces directly with the host serial/deserial (SerDes) interface. The host interface transmits and receives serial data differentially at 1.25 Gbps. The copper interface is full featured and advertises full/half duplex, and 1000Base-T wire speed. Auto-Negotiation The Category 5 copper link negotiates according to the IEEE 802.3 Clause 28, and the SerDes interface negotiates using Clause 37. The two interfaces advertise 1000Base-T full-duplex, and master/slave relationships. The master establishes the time control from its local clock source. The slave, however, recovers the clock from the received data stream. The SFP application is limited to 1000Base-T wire speed only. Auto-negotiation on the SerDes link is always restarted when a change is detected on copper link. The SFP 1000Base-T features a Serial Interface (SerDes) Auto-Negotiation Bypass mode. This mode disables auto-negotiation after 200ms of unsuccessful attempts with the host, without the need for manually configuring the auto-negotiation parameters. The Molex SFP 1000Base-T module will transmit data with auto-negotiation disabled. Automatic MDI Crossover The SFP 1000Base-T transceiver performs a MDI crossover during auto-negotiation, eliminating the need for crossover cables or cross-wired (MDIX) ports. 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver 74741 Automatic Polarity Correction Should the polarity of receive signals inadvertently become reversed, the SFP 1000Base-T will automatically correct them based on the sequence of idle signals received. Auto Power Savings Mode When the copper link is lost, the SFP automatically enters a low power mode, reducing the chip power requirements. Full power mode resumes once the copper link is re-established. Serial ID Serial identification is implemented on the SFP 1000Base-T transceiver. The serial protocol uses a two-wire I2C interface. Software Reconfigurable The SFP 1000Base-T is hardware configured on powerup. The configuration can be changed by a register write via a two-wire bus (I2C) at any time. For further details, refer to the Molex SFP 1000Base-T software configuration application note. AUTO-NEGOTIATION SUMMARY Auto-Negotiation Features Implemented General: ■ SerDes auto-negotiation is restarted when a change is detected on the copper link ■ Auto power savings mode when copper link is lost Copper RJ-45 Interface: ■ Auto-negotiation ■ Copper SFP speed 1000Base-T ■ Full duplex ■ Automatic MDI crossover ■ Master/slave relationships ■ Pause flow control ■ Software reconfigurable Americas Headquarters Lisle, Illinois 60532 U.S.A. 1-800-78MOLEX [email protected] Order No. USA-345 Host SerDes Interface: ■ Differential SerDes interface at 1.25 Gpbs ■ Master/slave relationships ■ SerDes recovers the clock from the received data stream ■ Pause flow control Far East North Headquarters Yamato, Kanagawa, Japan 81-462-65-2324 [email protected] Far East South Headquarters Jurong, Singapore 65-6-268-6868 [email protected] Visit our Web site at http://www.molex.com Printed in USA/1.5K/JI/JI/2006.04 European Headquarters Munich, Germany 49-89-413092-0 [email protected] Corporate Headquarters 2222 Wellington Ct. Lisle, IL 60532 U.S.A. 630-969-4550 Fax:630-969-1352 ©2006, Molex