74740-0001 MOLEX

Document overview

  • Manufacturer or author: Provided By digicamel.com
  • PDF pages: 11

Technical content

„1000Base-T compliant, meets IEEE802.3z, ab specifications and is GBIC SFF-8053 Rev 5.5 compliant – For improved intermatability „1.63 Watt power requirement – Low heat output „Hot pluggable – Eliminates need to power down to remove or install transceiver „Zinc back shells – Improved EMI performance „Auto-negotiation – 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 „Link monitor – Detects loss of signal „Serial ID – Allows individual identification of each GBIC transceiver „Auto-Power shutdown – Saves energy

Applications

■ Networking Equipment -S witches -R outers Reference Information Packaging: 1 Mates With: GBIC Cage 73847 series SCA-2 Receptacle 74065 series Electrical Voltage: 5v Current: 350mA Physical Zinc Diecast Backshell PCB Thickness: .062” Operating Temperature: 0 to 70°C The 1000Base-T RJ-45 Gigabit Ethernet GBIC copper transceiver is a high performance integrated duplex data link for bi-directional communication over Cat-5 copper cable. The hot pluggable feature allows changing to or from another GBIC compatible module without having to remove system power. Serial ID is included. 1000Base-T RJ-45 Gigabit Ethernet GBIC Copper Transceiver 74740 FEATURES AND SPECIFICATIONS

ORDERING INFORMATION

74740-0001 RJ-45 1000Base-T GBIC Transceiver With Serial ID, Auto Negotiation On LOS GND 74740-0002 RJ-45 1000Base-T GBIC Transceiver With Serial ID, Auto Negotiation On LOS Toggle 74740-0003 RJ-45 1000Base-T GBIC Transceiver With Serial ID, Auto Negotiation Off LOS Toggle

FEATURES

Figure 1. RJ-45 GBIC 1000Base-T Application

When the internal gigabit Ethernet transceiver (PHY) is configured to GBIC mode, the PHY can interface 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 Auto-Negotiation is supported over both the twisted pair copper link and SERDES interface as defined in the IEEE 802.3 standards and is performed as part of the initial set-up of the link. The copper link is negotiated according to the IEEE 802.3 Clause 28, and Clause 37 is used in the negotiation of the SERDES interface. 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 GBIC application is limited to 1000Base-T wire speed only. Auto-Negotiation on the SERDES link is always restarted when a changei s detected on copper link (see Link Monitor and Loss-of-Signal for further details). Automatic MDI Crossover The 1000Base-T GBIC transceiver performs a MDI crossover during Auto-Negotiation eliminating the need for crossover cables or cross- wired (MDIX) ports. Loss of Signal - Link Monitor Following Auto-Negotiation, the master and slave begin sending data over the twisted pair link. The master and slave continuously monitor the copper link for quality of data. The link status bit is set after one microsecond of quality data. If the quality of copper link drops below factory PHY minimums, the GBIC will drop the SERDES link, and assert the LOS I/O interface (optional) in less than 200 milliseconds. Auto Power Savings Mode When the copper link is lost, the GBIC automatically enters a low power mode reducing the chip power requirements. Full power mode resumes once the copper link is re-established. Not Implemented in GBIC Auto-Negotiation Next page exchange and detection of remote faults are not auto-negotiated. 1000Base-T RJ-45 Gigabit Ethernet GBIC Copper Transceiver 1000BASE-T RJ-45 GBIC FEATURES

Auto-Negotiation Features Supported: General: Š SERDES Auto-Negotiation is restarted when a change is detected on the copper link Š Auto power savings mode when copper link is lost Copper RJ-45 Interface: Š Auto-Negotiation Š Copper GBIC speed is 1000Base-T only Š Full/Half duplex Š Automatic MDI Crossover Š Master/Slave relationships Š Pause flow control (see flow charts) Host SERDES Interface: Š Differential SERDES Interface at 1.25Gpbs Š Master/Slave relationships Š SERDES recovers the clock from the received data stream Š Pause flow control (see flow charts) Not Implemented in GBIC Auto-Negotiation: Š Next page exchange Š Detect remote fault 1000Base-T RJ-45 Gigabit Ethernet GBIC Copper Transceiver AUTO-NEGOTIATION SUMMARY

GBIC OPERATIONAL FLOWCHARTS (74740-0001) Routine Start Get Copper Auto-Neg Information Advertise to SERDES Enable SERDES Interface Get SERDES Auto-Neg Information Advertise to Copper Restart Auto-Neg Return No Yes Wait for SERDES Auto-Neg to Complete No Yes Wait for Copper Auto-Neg to Complete No Yes Wait for Auto-Neg to Complete LOS GND Disable SERDES Interface Auto-Negotiation Link Dropout Main Yes No Good Copper Link Drop SERDES Link Restart Auto-Negotiation

GBIC OPERATIONAL FLOWCHARTS (74740-0002) Routine Start Get SERDES Auto-Neg Information Advertise to Copper Get SERDES Auto-Neg Information Advertise to Copper Restart Auto-Neg Return No Yes Wait for SERDES Auto-Neg to Complete No Yes Wait for Copper Auto-Neg to Complete No Yes Wait for Auto-Neg to Complete LOS HIGH Disable SERDES Interface Link is Good LOS LOW Auto-Negotiation Link Dropout Main Yes No Good Copper Link Drop SERDES Link Restart Auto-Negotiation LOS HIGH

GBIC OPERATIONAL FLOWCHARTS (74740-0003) Auto-Negotiation Link Dropout Routine Start Disable SERDES No Yes Wait for Copper Auto-Neg to Complete LOS HIGH Enable SERDES Return No Yes Good Copper Link Link is Good LOS LOW Get Copper Auto-Neg Information Advertise to SERDES Main Yes No Good Copper Link Restart Auto-Negotiation LOS HIGH

AUTO-NEGOTIATION SOFTWARE SELECTIONS Through random I2C read commands, the host can change the auto-negotiation state of the GBIC. When auto-negotiation in the GBIC is off, the GBIC does not automatically query the host and advertise pause flow control on the copper interface. If the host requires advertisement of pause flow control and auto-negotiation is off, the host can set pause, and asymmetric pause using the defined I2C commands. Serial ID addresses 128-133 are used in the random I2C read commands. The read commands, and GBIC actions are defined in the I2C Command Table. I2C Command Table I2C Read Address Description GBIC Actions 128 ( 0x80 ) GBIC Auto-Negotiation Status • Return Status Byte

  • Turn Auto-Negotiation ON
  • Restart Auto-Negotiation
  • Return Status Byte
  • Turn Auto-Negotiation OFF
  • Restart Auto-Negotiation
  • Return Status Byte
  • Clear Pause Flow Control
  • Clear Asymmetric Pause
  • Return Status Byte SERDES Pause Flow Control Advertisement • Set SERDES Pause Flow Control Bit (auto-negotiation off only) • Return Status Byte SERDES Asymmetric Pause Flow Control Advertisement • Set SERDES Asymmetric Pause Flow Control Bit (auto-negotiation off only) • Return Status Byte 129 ( 0x81 ) Enable Auto-Negotiation 130 ( 0x82 ) Disable Auto-Negotiation 131 ( 0x83 ) Clear SERDES Pause Flow Control Advertisement 132 ( 0x84 ) 133 ( 0x85 ) GBIC Status Byte Bit Description

7 Reserved

6 Reserved

5 Reserved

4 Copper has Advertised Asymmetric Pause

3 Copper has Advertised Pause

2 Host to Advertise Asymmetric Pause on Copper

1 Host to Advertise Pause on Copper

0 GBIC Auto Negotiation Status 1 = On / 0 = Off

Module Specifications – Recommended Operating Conditions 1000Base-T RJ-45 Gigabit Ethernet GBIC Copper Transceiver ACTIVE PERFORMANCE SPECIFICATIONS PARAMETERS SYMBOL MIN TYP MAX UNITS NOTES Storage Temperature Tstg -40 85 ºC Ambient Operating Temperature Ta 0 70 ºC Supply Voltage VDDR, VDDT 4.75 5.25 Vdc Vcc-ground Supply Current Icc 350 mA Surge Current Isurge 55 mA Surge above steady state value GBIC Host Serial Interface (TX/RX) Data Input/Output Type LVDS, AC coupled Impedance (SERDES Interface) 150 ohms Differential Transmitte r (Input to GBIC) Input Voltage 400 2400 mVpp Receiver (Output to SERDES) Output Voltage 875 1525 mVpp Max Off Voltage 170 mVpp Rise Time, 20%–80% 85 350 ps Total Jitter 192 ps Skew 175 ps Link Dropout 74740-0001 100 200 msec From detection of loss of signal to SERDES disable Loss of Signal Timing 74740-0002, 74740-0003 RX_LOS assert delay t_loss_on 100 200 msec From detection of loss of signal to assertion of RX_LOS RX_LOS negate delay t_loss_off 3 3.5 sec From detection of presence of signal to negation of RX_LOS

RELIABILITY PREDICTION REPORT Temperature: 75°C Assembly Name Part Number Failure Rate MTBF 1000Base-T Adapter 74740-xxxx 0.309435 3,231,693 Active Components 0.178609 5,598,828 Passive Components 0.130827 7,643,711 IMPEDANCE MATCHING AND POWER SUPPLY FILTERING Signal inputs/outputs on the GBIC transceiver modules are AC coupled and internally terminated to 75 ohms (TD+, TD-, RD+, RD-). Each leg of the differential pair was equally matched in length. Figure 2 shows the recommended power supply filtering network. Figure 2: Recommended Host Board Supply Filtering Network GBIC Module VccT VccR 0.1µF 1.0µH 0.1µF 1.0µH10µF 0.1µF 10µF

GBIC HOST CONNECTOR PIN DESCRIPTIONS PIN NAME DESCRIPTION PIN 1 RX_LOS Receiver Loss of Signal, logic high, open collector compatible, 4.7 K to 10 K Ohm pull-up to VDDT on host. See part number chart for details. PIN 2 RGND Receiver Ground PIN 3 RGND Receiver Ground PIN 4 MOD_DEF(0) GBIC module definition and presence, 4.7 K to 10 K Ohm pull-up to VDDT on host PIN 5 MOD_DEF(1) Signal SCL (Clock) of the 2-w ire serial ID interface, 4.7 K to 10 K Ohm pull- up to VDDT on host, 100KHz maximum clock rate. PIN 6 MOD_DEF(2) Signal SDA (Data) of the 2-w ire serial ID interface, 4.7 K to 10 K Ohm pull- up to VDDT on host PIN 7 TX_DISABLE TX_DISABLE is not implemented. Transmitter Disable, logic high, open collector compatible, 4.7 K to 10 K Ohm pull-up to VDDT on GBIC. PIN 8 TGND Transmitter Ground PIN 9 TGND Transmitter Ground PIN 10 TX_FAULT Transmitter Fault, logic high, open collector compatible, 4.7 K to 10 K Oh pull-up to VDDT on host. Not implemented on the RJ-45 GBIC PIN 11 RGND Receiver Ground PIN 12 RX_DATA (-) Receive Data, differential AC coupled PIN 13 RX_DATA (+) Receive Data, differential AC coupled PIN 14 RGND Receiver Ground PIN 15 VDDR Receiver Supply +5.0 Volts PIN 16 VDDT Transmitter Supply +5.0 Volts PIN 17 TGND Transmitter Ground PIN 18 TX_DATA (+) Transmit Data, differential AC coupled PIN 19 TX_DATA (-) Transmit Data, differential AC coupled PIN 20 TGND Transmitter Ground

1000BASE-T GBIC DIMENSIONS Corporate Headquarters 2222 Wellington Ct. Lisle, Illinois 60532 USA 630-969-4550 European Headquarters Munich, Germany 49-89-413092-0 eurinfo@molex.com Far East South Headquarters Jurong, Singapore 65-6-268-6868 fesinfo@molex.com Far East North Headquarters Yamato, Kanagawa, Japan 81-462-65-2324 feninfo@molex.com High Performance Adapter Headquarters

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Maumelle, AE 72113 USA 501-851-4850 amerinfo@molex.com Order No. USA-206 Printed in USA/0K/AJ/2003.10 ©2003, Molex