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    10Gbps 1310nm 10km LC SFP+ Transceiver

    10G SFP+ 1310nm 10km LC Compatible Transceiver

    This 1310nm DFB 10Gigabit SFP+ transceiver is designed to transmit and receive optical data over single mode optical fiber for link length 10km/20km, fully tested compatible for over 100 vendors.

    Features

    *Optical interface compliant to IEEE 802.3ae 10GBASE-LR

    *Electrical interface compliant to SFF-8431

    *Hot Pluggable

    *1310nm DFB transmitter, PIN photo-detector

    *Operating case temperature: 0 to 70 °C and -40~85°C 

    *Low power consumption

    *Applicable for 10km/20km SMF connection

    *All-metal housing for superior EMI performance

    *Advanced firmware allow customer system encryption information to be stored in transceiver

    *Cost effective SFP+ solution, enables higher port densities and greater bandwidth

    Applications

    *10GBASE-LR at 10.3125Gbps

    *10GBASE-LW at 9.953Gbps

    *Other optical links

     

    Product description

      This 1310nm DFB 10Gigabit SFP+ transceiver is designed to transmit and receive optical data over single mode optical fiber for link length 10km/20km.  

      The SFP+ LR module electrical interface is compliant to SFI electrical specifications.  The transmitter input and receiver output impedance is 100 Ohms differential.  Data lines are internally AC coupled.  The module provides differential termination and reduce differential to common mode conversion for quality signal termination and low EMI.  SFI typically operates over 200 mm of improved FR4 material or up to about 150mmof standard FR4 with one connector.

      In the transmit direction, the SFP+ transceiver module receives a 10.3125 Gb/s electrical signal (signaling rate) from the host board Asic/SerDes and converts the data to an optical signal via the Laser Driver that controls the Laser diode in the Transmitter Optical Sub-Assembly (TOSA).  An open collector compatible Transmit Disable (Tx_Dis) is provided. A logic “1,” or no connection on this pin will disable the laser from transmitting.  A logic “0” on this pin provides normal operation. The transmitter has an internal automatic power control loop (APC) to ensure constant optical power output across supply voltage and temperature variations.  An open collector compatible Transmit Fault (TFault) is provided.  TX_Fault is a module output contact that when high, indicates that the module transmitter has detected a fault condition related to laser operation or safety.  The TX_Fault output contact is an open drain/collector and shall be pulled up to the Vcc_Host in the host with a resistor in the range 4.7-10 kΩ.   TX_Disable is a module input contact. When TX_Disable is asserted high or left open, the SFP+ module transmitter output shall be turned off. This contact shall be pulled up to VccT with a 4.7 kΩ to 10 kΩ resistor

    The receiver converts 10Gbit/s serial optical data into serial PECL/CML electrical data.  An open collector compatible Loss of Signal is provided.  Rx_LOS when high indicates an optical signal level below that specified in the relevant standard.  The Rx_LOS contact is an open drain/collector output and shall be pulled up to Vcc_Host in the host with a resistor in the range 4.7-10 kΩ, or with an active termination.  Power supply filtering is recommended for both the transmitter and receiver.   The Rx_LOS signal is intended as a preliminary indication to the system in which the SFP+ is installed that the received signal strength is below the specified range. Such an indication typically points to non-installed cables, broken cables, or a disabled, failing or a powered off transmitter at the far end of the cable.

    The 3rd functional capability of the SFP+ module is the 2 wire serial, I2C, interface.  I2C is used for serial ID, digital diagnostics, and module control functions. The enhanced digital diagnostics monitoring interface allows real time access to the device allowing monitor of received optical power, laser bias current, laser optical output power, etc.

     

     

    Figure 1: Interface to Host

     

     

     

     

     

     

    Pin definition 

    The SFP+ modules are hot-pluggable.  Hot pluggable refers to plugging in or unplugging a module while the host board is powered.  The SFP+ host connector is a 0.8 mm pitch 20 position right angle improved connector specified by SFF-8083, or stacked connector with equivalent with equivalent electrical performance.   Host PCB contact assignment is shown in Figure 2 and contact definitions are given in Table 2.   SFP+ module contacts mates with the host in the order of ground, power, followed by signal as illustrated by Figure 3 and the contact sequence order listed in Table 2.

     

    Figure 2: Interface to Host PCB

     

     

     

    Figure 3: Module Contact Assignment

     

    Table 2: SFP+ Module PIN Definition

     

    Absolute maximum rating 

    These values represent the damage threshold of the module.  Stress in excess of any of the individual Absolute Maximum Ratings can cause immediate catastrophic damage to the module even if all other parameters are within Recommended Operating Conditions.

     

    Parameters

    Symbol

    Min.

    Max.

    Unit

    Power Supply Voltage

    VCC

    0

    +3.6

    V

    Storage Temperature

    Tc

    -40

    +85

    °C

    Operating Case Temperature

    Tc

    0

    +70

    °C

    Relative Humidity

    RH

    5

    95

    %

    RX Input Average Power

    Pmax

    -

    0

    dBm

    Table 3: Absolute Maximum Rating

     

     

    Recommended operating environment 

    Recommended Operating Environment specifies parameters for which the electrical and optical characteristics hold unless otherwise noted.

     

    Parameter

    Symbol

    Min.

    Typical

    Max

    Unit

    Power Supply Voltage

    VCC

    3.135

    3.300

    3.465

    V

    Operating Case Temperature

    TC

    0

    25

    70

    °C

    Table 4: Recommended Operating Environment

     

    Optical characteristics

    The following optical characteristics are defined over the Recommended Operating Environment unless otherwise specified.

     

    Unit

    Values

    Operating Reach

    m

    10K

    Transmit

    Center wavelength (range)

    nm

    1260 -1355

    Side Mode Suppression Ratio (min)

    dB

    30

       Launched power

    – maximum

    dBm

    +0.5

    – minimum

    dBm

                  -8.2      Notes1

    - OMA

    dBm

    -5.2

    - OMA-TDP (min)

    dBm

    -6.2

    Transmitter and dispersion penalty

    dB

                   0        Notes4

    Average launch power of OFF transmitter (max)

    dBm

    -30

      Extinction ratio (min)

    dB

                 3.5     Notes2

    RIN12 OMA (max)

    dB/Hz

    -128

    Optical Return Loss Tolerance (min)

    dB

    12

    Receiver

    Center wavelength (range)

    nm

    1260-1355

    Receive overload (max) in average power1

    dBm

    0.5

    Receive sensitivity (min) in average power1

    dBm

     -14.4    Notes3 (10km)

    dBm

     -13.4    Notes3 (20km)

    Receiver sensitivity (max) in OMA (footnote 2)

    dBm

      -12.6    Notes3 (10km)

    dBm

     -11.6    Notes3 (20km)

    Receiver Reflectance (max)

    dB

    -12

    Stressed receiver sensitivity (max) in OMA2 

    dBm

    -10.3

    Vertical eye closure penalty (min)3

    dB

    2.2

    Stressed eye jitter (min)2

    UIp-p

    0.7

    Receive electrical 3dB upper cutoff frequency (max)

    GHz

    12.3

    Receiver power (damage, Max)

    dBm

    1.5

    Notes:

    1. The optical power is launched into SMF

    2. Measured with a PRBS 231-1 test pattern@10.3125Gbps

    3. Measured with a PRBS 231-1 test pattern@10.3125Gbps BER≤10-12

    4.   In G.652 and G.655(NDSF)

    Table 5: Optical Characteristics

     

    Electrical characteristics

    The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified.

     

    Parameter

    Symbol

    Min.

    Typical

    Max

    Unit

    Notes

    Data Rate

     

    -

    10.3125

    -

    Gbps

     

    Power Consumption

     

    -

    1200

    1500

    mW

     

    Transmitter

    Single Ended Output Voltage Tolerance

     

    -0.3

    -

    4.0

    V

     

    C common mode voltage tolerance

     

    15

    -

    -

    mV

     

    Tx Input Diff Voltage

    VI

    400

     

    1600

    mV

     

    Tx Fault

    VoL

    -0.3

     

    0.4

    V

    At 0.7mA

    Data Dependent Input Jitter

    DDJ

     

     

    0.10

    UI

     

    Data Input Total Jitter

    TJ

     

     

    0.28

    UI

     

    Receiver

    Single Ended Output Voltage Tolerance

     

    -0.3

    -

    4.0

    V

     

    Rx Output Diff Voltage

    Vo

    300

     

    850

    mV

     

    Rx Output Rise and Fall Time

    Tr/Tf

    30

     

     

    ps

    20% to 80%

    Total Jitter

    TJ

     

     

    0.70

    UI

     

    Deterministic Jitter

    DJ

     

     

    0.42

    UI

     

    Table 6: Electrical Characteristics

     

     

     


    Conrtol and status I/O timing characteristics

    Timing characteristics of control and status I/O are included in Table 7, which is also defined in SFF-8431.

     

     

    Table 7: Timing Characteristics

     

     

     

     

    Mechanical

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

    Table 8: Key Mechanical Dimensions

     

     

     

     

     

    Ordering information

    Part Number

    Product Description

    ST-SFP+-LR

    10Gbps 1310nm 10km LC SFP+ Transceiver

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