74741-0002

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. 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 crosswired (MDIX) ports ■ Bail latch provides ease of extraction ■ 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver 74741 Applications ■ Networking ■ Switches ■ Routers 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 ORDERING INFORMATION O rder No. 7 4741-0001 74741-0002 Description 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver, LOS Toggle 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver, LOS GND SFP 1000BASE-T RJ-45 OVERVIEW Switch Board SFP Adapter Transformer MAC TBI SERDES Serial Interface SFP Host Interface Serial Interface 1000Base-T Transceiver RJ-45 Figure 1. RJ-45 SFP 1000Base-T Application SFP 1000BASE-T RJ-45 FEATURES SFP Mode Automatic MDI Crossover 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 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 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver 74741 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 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. AUTO-NEGOTIATION SUMMARY Auto-Negotiation Features Implemented: General: ■ ■ 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 detail, refer to the Molex SFP 1000Base-T software configuration application note. Host SERDES Interface: ■ ■ ■ ■ SERDES Auto-Negotiation is restarted when a change is detected on the copper link Auto power savings mode when copper link is lost Auto-Negotiation Copper SFP speed 1000Base-T Full duplex Automatic MDI Crossover Master/slave relationships Pause flow control Software reconfigurable Copper RJ-45 Interface: ■ ■ ■ ■ ■ ■ ■ Differential SERDES interface at 1.25Gpbs Master/slave relationships SERDES recovers the clock from the received data stream Pause flow control ACTIVE PERFORMANCE SPECIFICATIONS 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver 74741 MIN -40 0 3.13 TYP MAX 85 70 3.47 300 TBD UNITS °C °C Vdc mA mA NOTES SYMBOL Tstg Ta V DDR , V DDT Icc Isurge Module Specifications - Recommended Operating Conditions PARAMETERS S torage Temperature A mbient Operating Temperature S upply Voltage Supply Current Surge Current S FP Host Serial Interface (TX/RX) Data Input/Output Type Impedance (SERDES Interface) T ransmitter (Input to SFP) I nput Voltage Receiver (Output to SERDES) O utput Voltage Max Off Voltage Rise Time, 20%–80% Total Jitter Skew 3.3 285 Vcc-ground Surge above steady state value 100 ohms LVDS, AC coupled Differential 400 2400 mVpp 875 100 80 15 1525 170 200 120 30 mVpp mVpp ps ps ps IMPEDANCE MATCHING AND POWER SUPPLY FILTERING The SFP transceiver module’s signal inputs/outputs are AC coupled and internally terminated to 100 ohms (TD+, TD-, RD+, RD-). Each leg of the differential pair is equally matched in length to reduce signal skew. VccT 0.1µF 1.0µH VccR 0.1µF 10µF 1.0µH 0.1µF 10µF 3.3V SFP Module 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 P IN P IN 1 PIN 2 PIN 3 PIN 4 PIN 5 PIN 6 PIN 7 PIN 8 PIN 9 PIN 10 PIN 11 PIN 12 PIN 13 PIN 14 PIN 15 PIN 16 PIN 17 PIN 18 PIN 19 PIN 20 P art No. ■ NAME GND TX_FAULT TX_DISABLE MOD_DEF(2) MOD_DEF(1) MOD_DEF(0) Rate select LOS GND GND GND RDRD+ GND VCC VCC GND TD+ TDGND DESCRIPTION Ground This pin is internally tied to transmit ground. TX_Fault is not implemented. Low for normal operation. Active high input which disables the transmitter output. 5.1K pull-up on module. Signal SDA (Data) of the two-wire serial ID interface. Signal SCL (Clock) of the two-wire serial ID interface. This pin is internally tied to transmit ground. This pin is floating. Rate select is not implemented. See part description for details (below) Ground Ground Ground Differential receiver outputs. User to terminate to 100 ohms differential at host. (AC coupled) Differential receiver outputs. User to terminate to 100 ohms differential at host. (AC coupled) Ground 3.3V Power 3.3V Power Ground Differential transmitter inputs. Internally terminated to 100 ohms differential at host. (AC coupled) Differential transmitter inputs. Internally terminated to 100 ohms differential at host. (AC coupled) Ground Options Part No. ■ Options ■ ■ 7 4741-0001 ■ ■ 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 V isit o u r W e b sit e at www.mo l e x .co m/ pro du ct / i o / sfp1000.h t ml Order No. USA-209 Printed in USA/JI/2004.03 © 2004, Molex