74741_04 MOLEX

Document overview

  • Manufacturer or author: Provided By digicamel.com
  • PDF pages: 4

Technical content

FEATURES AND SPECIFICATIONS 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver 74741 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. Molex's RJ-45 SFP module provides multiple customer friendly 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. Design allows stacking side by side 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 back shells 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

Applications

Specifications Reference Information Packaging: Box Mates With: SFP Cage 73927 series SFP Connector 74441 series Electrical Voltage: 3.3V Current: 285mA Power: 1 W max. Physical Diecast Backshell: Zinc PCB Thickness: .039” Operating Temperature: 0 to +70°C SFP 1000BASE-T RJ-45 OVERVIEW Switch Board SFP Adapter MAC TBI Serial Interface Serial Interface SERDES RJ-45SFP Host Interface 1000Base-T Transceiver Transformer

ORDERING INFORMATION

Order No. Description 74741-0001 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver, LOS Toggle 74741-0002 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver, LOS GND Figure 1. RJ-45 SFP 1000Base-T Application

SFP 1000BASE-T 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 1.25Gbps. The copper interface is full featured and advertises full/half duplex, and 1000Base-T wire speed. Auto-Negotiation The CAT-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. 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 power- up. The configuration can be changed by a register write via a two-wire bus (I2C) at any time. For further detail, refer to the Molex SFP 1000Base-T software configuration application note. 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver 74741 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 Host SERDES Interface: Differential SERDES interface at 1.25Gpbs Master/slave relationships SERDES recovers the clock from the received data stream Pause flow control

matched in length to reduce signal skew. Figure 2. Recommended Host Board Supply Filtering Network

SFP HOST CONNECTOR PIN DESCRIPTIONS 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver 74741 SFP Host Connect Electrical Interface, Pin Descriptions PIN NAME DESCRIPTION PIN 1 GND Ground PIN 2 TX_FAULT This pin is internally tied to transmit ground. TX_Fault is not implemented. PIN 3 TX_DISABLE Low for normal operation. Active high input which disables the transmitter output. 5.1K pull-up on module. PIN 4 MOD_DEF(2) Signal SDA (Data) of the two-wire serial ID interface. PIN 5 MOD_DEF(1) Signal SCL (Clock) of the two-wire serial ID interface. PIN 6 MOD_DEF(0) This pin is internally tied to transmit ground. PIN 7 Rate select This pin is floating. Rate select is not implemented. PIN 8 LOS See part description for details (below) PIN 9 GND Ground PIN 10 GND Ground PIN 11 GND Ground PIN 12 RD- Differential receiver outputs. User to terminate to 100 ohms differential at host. (AC coupled) PIN 13 RD+ Differential receiver outputs. User to terminate to 100 ohms differential at host. (AC coupled) PIN 14 GND Ground PIN 15 VCC 3.3V Power PIN 16 VCC 3.3V Power PIN 17 GND Ground PIN 18 TD+ Differential transmitter inputs. Internally terminated to 100 ohms differential at host. (AC coupled) PIN 19 TD- Differential transmitter inputs. Internally terminated to 100 ohms differential at host. (AC coupled) PIN 20 GND Ground Part No. Options Part No. Options 74741-0001 Auto Negotiation On Auto Negotiation Bypass LOS Toggle 74741-0002 Auto Negotiation On Auto Negotiation Bypass LOS GND SFP 1000BASE-T DIMENSIONS Americas Headquarters Lisle, Illinois 60532 U.S.A. 1-800-78MOLEX amerinfo@molex.com Far East North Headquarters Yamato, Kanagawa, Japan 81-462-65-2324 feninfo@molex.com Far East South Headquarters Jurong, Singapore 65-6-268-6868 fesinfo@molex.com European Headquarters Munich, Germany 49-89-413092-0 eurinfo@molex.com Corporate Headquarters 2222 Wellington Ct. Lisle, IL 60532 U.S.A. 630-969-4550 Fax:630-969-1352 Visit our Web site at www.molex.com/product/io/sfp1000.html Order No. USA-209 Printed in USA/JI/2004.03 2004, Molex