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    2.488Gbps SFP Optical Transceiver, 80km Reach

    2.5Gbps Compatible SFP Optical Transceiver, 1550nm,80km LC

    2.488Gbps SFP Optical Transceiver, 80km Reach, Up to 2.488Gb/s bi-directional data links, 1550nm DFB laser and APD photodetector for 80km transmission, Compliant with SFP MSA and SFF-8472 with duplex LC receptacle, fully tested compatible for over 100 vendors.

    Features

    * Up to 2.488Gb/s bi-directional data links

    1550nm DFB laser and APD photodetector for 80km transmission

    * Compliant with SFP MSA and SFF-8472 with duplex LC receptacle

    * Digital Diagnostic Monitoring:

      Internal Calibration or External Calibration

    * Compatible with RoHS

    * +3.3V single power supply

    * Operating case temperature:

    Standard :  0 to +70°C

    Extended : -20 to +85°C

    Applications

    * SDH STM-16 and SONET OC-48 system

    * 2X Fiber Channel

    * Switch to Switch interface

    * Switched backplane applications

    * Router/Server interface

    * Other optical transmission systems

    Description

    The SFP transceivers are high performance, cost effective modules supporting dual data-rate of  2.488Gbps and 80km transmission distance with SMF.

    The transceiver consists of three sections: a DFB laser transmitter, a APD photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.

    Absolute Maximum Ratings

    Table 1 - Absolute Maximum Ratings

    Parameter

    Symbol

    Min

    Max

    Unit

    Supply Voltage

    Vcc

    -0.5

    4.5

    V

    Storage Temperature

    Ts

    -40

    +85

    °C

    Operating Humidity

    -

    5

    85

    %

     

     

    Recommended Operating Conditions

    Table 2 - Recommended Operating Conditions

    Parameter

    Symbol

    Min

    Typical

    Max

    Unit

    Operating Case Temperature

    Standard

    Tc

    0

     

    +70

    °C

    Extended

    -20

     

    +85

    °C

    Power Supply Voltage

    Vcc

    3.13

    3.3

    3.47

    V

    Power Supply Current

    Icc

     

     

    300

    mA

    Data Rate

     

     

    2.488

     

    Gbps

     

     

     

     

     

     

    Optical and Electrical Characteristics

    BT-OC48-80:  (DFB and APD, 1550nm, 80km Reach)

    Table 3 - Optical and Electrical Characteristics

    Parameter

    Symbol

    Min

    Typical

    Max

    Unit

    Notes

    Transmitter

    Centre Wavelength

    λc

    1520

    1550

    1580

    nm

     

    Spectral Width (-20dB)

    σ

     

     

    1

    nm

     

    Side Mode Suppression Ratio

    SMSR

    30

     

     

    dB

     

    Average Output Power

    Pout

    0

     

    +5

    dBm

    1

    Extinction Ratio

    ER

    9

     

     

    dB

     

    Optical Rise/Fall Time (20%~80%)

    tr/tf

     

     

    0.16

    ns

     

    Data Input Swing Differential

    VIN

    400

     

    1800

    mV

    2

    Input Differential Impedance

    ZIN

    90

    100

    110

    Ω

     

    TX Disable

    Disable

     

    2.0

     

    Vcc

    V

     

    Enable

     

    0

     

    0.8

    V

     

    TX Fault

    Fault

     

    2.0

     

    Vcc

    V

     

    Normal

     

    0

     

    0.8

    V

     

    Receiver

    Centre Wavelength

    λc

    1260

     

    1580

    nm

     

    Receiver Sensitivity

     

     

     

    -28

    dBm

    3

    Receiver Overload

     

    -9

     

     

    dBm

    3

    LOS De-Assert

    LOSD

     

     

    -30

    dBm

     

    LOS Assert

    LOSA

    -40

     

     

    dBm

     

    LOS Hysteresis

     

    1

     

    4

    dB

     

    Data Output Swing Differential

    Vout

    370

     

    1800

    mV

    4

    LOS

    High

    2.0

     

    Vcc

    V

     

    Low

     

     

    0.8

    V

     

    Notes:

    1. The optical power is launched into SMF.
    2. PECL input, internally AC-coupled and terminated.
    3. Measured with a PRBS 223-1 test pattern @2488Mbps, BER ≤1×10-12.
    4. Internally AC-coupled.

     

     

     

     

     

    Timing and Electrical

    Table 4 - Timing and Electrical

    Parameter

    Symbol

    Min

    Typical

    Max

    Unit

    Tx Disable Negate Time

    t_on

     

     

    1

    ms

    Tx Disable Assert Time

    t_off

     

     

    10

    µs

    Time To Initialize, including Reset of Tx Fault

    t_init

     

     

    300

    ms

    Tx Fault Assert Time

    t_fault

     

     

    100

    µs

    Tx Disable To Reset

    t_reset

    10

     

     

    µs

    LOS Assert Time

    t_loss_on

     

     

    100

    µs

    LOS De-assert Time

    t_loss_off

     

     

    100

    µs

    Serial ID Clock Rate

    f_serial_clock

     

     

    400

    KHz

    MOD_DEF (0:2)-High

    VH

    2

     

    Vcc

    V

    MOD_DEF (0:2)-Low

    VL

     

     

    0.8

    V

     

     

    Diagnostics

    Table 5 – Diagnostics Specification

    Parameter

    Range

    Unit

    Accuracy

    Calibration

    Temperature

    0 to +70

    °C

    ±3°C

    Internal / External

    -20 to +85

    Voltage

    3.0 to 3.6

    V

    ±3%

    Internal / External

    Bias Current

    0 to 100

    mA

    ±10%

    Internal / External

    TX Power

    0 to +5

    dBm

    ±3dB

    Internal / External

    RX Power

    -30 to -9

    dBm

    ±3dB

    Internal / External

     

     

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