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SFP Transceiver

1.25G 20KM BIDI SC

●Supports 1.25Gbps/1.0625Gbps bit rates
●Bi-Directional SC/PC connector
●Hot pluggable SFP footprint
●1310nm FP laser and1550nm PIN photo detector 
●1550nm DFB laser and 1310nm PIN photo detector
●Applicable for 20Km SMF connection
●Low power consumption, < 0.8W
●Digital Diagnostic Monitor Interface
●Compliant with SFP MSA and SFF-8472 
●Very low EMI and excellent ESD protection    
●Operating case temperature: 
Commerical:0 to 70 °C 
   Industrial:-40 to 85 °C 

    Applications

    ●Gigabit Ethernet

    ●Fiber Channel

    ●Switch to Switch interface

    ●Switched backplane applications  

    ●Router/Server interface

    ●Other Optical Links

     

    Product Descriptions

     SFP-BIDI transceivers are high performance, cost effective modules supporting dual data-rate of 1.25Gbps/1.0625Gbps and 20km transmission distance with SMF.The transceiver consists of three sections: a FP/DFB laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements. The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.

     

    Absolute Maximum Ratings

    Parameter

    Symbol

    Min.

    Max.

    Unit

    Note

    Supply Voltage

    Vcc

    -0.5

    4.0

    V

     

    Storage Temperature

    TS

    -40

    85

    °C

     

    Relative Humidity

    RH

    0

    85

    %

     

     

    Note: Stress in excess of the maximum absolute ratings can cause permanent damage to the transceiver.

    General Operating Characteristics

    Parameter

    Symbol

    Min.

    Typ

    Max.

    Unit

    Note

    Data Rate

    DR

    1.0625

    1.25

     

    Gb/s

     

    Supply Voltage

    Vcc

    3.13

    3.3

    3.47

    V

     

    Supply Current

    Icc5

     

     

    220

    mA

     

    Operating Case Temp.

    Tc

    0

     

    70

    °C

     

    TI

    -40

     

    85

     

     

    Electrical Characteristics (TOP(C) = 0 to 70 , TOP(I) =-40 to 85 ,VCC = 3.13 to 3.47 V)

    Parameter

    Symbol

    Min.

    Typ

    Max.

    Unit

    Note

    Transmitter

    Differential data input swing

    VIN,PP

    120

     

    820

    mVpp

    1

    Tx Disable Input-High

    VIH

    2.0

     

    Vcc+0.3

    V

     

    Tx Disable Input-Low

    VIL

    0

     

    0.8

    V

     

    Tx Fault Output-High

    VOH

    2.0

     

    Vcc+0.3

    V

    2

    Tx Fault Output-Low

    VOL

    0

     

    0.8

    V

    2

    Input differential impedance

    Rin

     

    100

     

    Ω

     

    Receiver

    Differential data output swing

    Vout,pp

    340

    650

    800

    mVpp

    3

    Rx LOS Output-High

    VROH

    2.0

     

    Vcc+0.3

    V

    2

    Rx LOS Output-Low

    VROL

    0

     

    0.8

    V

    2

     

    Notes:

    1. TD+/- are internally AC coupled with 100Ω differential termination inside the module.

    2. Tx Fault and Rx LOS are open collector outputs, which should be pulled up with 4.7k to 10kΩ resistors on the host board. Pull up voltage between 2.0V and Vcc+0.3V.

    3.RD+/- outputs are internally AC coupled, and should be terminated with 100Ω (differential) at the user SERDES.

     

    Optical Characteristics (TOP(C) = 0 to 70 , TOP(I) =-40 to 85 ,VCC = 3.13 to 3.47 V)

    Parameter

    Symbol

    Min.

    Typ

    Max.

    Unit

    Note

    Transmitter

    Operating Wavelength

    λ

    1270

    1310

    1360

    nm

     

    1510

    1550

    1570

     

    Ave. output power (Enabled)

    PAVE

    -9

     

    -3

    dBm

    1

    Extinction Ratio

    ER

    9

     

     

    dB

    1

    Side-Mode Suppression Ratio

    SMSR

    30

     

     

    dB

     

    RMS spectral width 1310nm FP

    Δλ

     

     

    3

    nm

     

    RMS spectral width 1550nm DFB

     

     

     

    1

    nm

     

    Rise/Fall time (20%~80%)

    Tr/Tf

     

     

    0.26

    ns

    2

    Dispersion penalty

    TDP

     

     

    3.9

    dB

     

    Output Optical Eye

    Compliant with  IEEE802.3 z (class 1 aser safety)

    Receiver

    Operating Wavelength

    λ

    1510

    1550

    1570

    nm

     

    1270

    1310

    1360

     

    Receiver Sensitivity

    PSEN1

     

     

    -22

    dBm

    3

    Overload

    PAVE

    -3

     

     

    dBm

    3

    LOS Assert

    Pa

    -35

     

     

    dBm

     

    LOS De-assert

    Pd

     

     

    -24

    dBm

     

    LOS Hysteresis

    Pd-Pa

    0.5

     

     

    dB

     

     

    Notes:

    1.Measured at 1250Mb/s with PRBS 2 223 – 1NRZ test pattern.

    2.Unfiltered, measured with a PRBS223 – 1 test pattern @1.25Gbps

    3.Measured at 1250Mb/s with PRBS 223 – 1 NRZ test pattern for BER < 1x10-12

     

    Pin Defintion And Functions

    Pin

    Symbol

    Name/Description

    Notes

    1

    VeeT

    Tx ground

     

    2

    Tx Fault

    Tx fault indication, Open Collector Output, active “H”

    1

    3

    Tx Disable

    LVTTL Input, internal pull-up, Tx disabled on “H”

    2

    4

    MOD-DEF2

    2 wire serial interface data input/output (SDA)

    3

    5

    MOD-DEF1

    2 wire serial interface clock input (SCL)

    3

    6

    MOD-DEF0

    Model present indication

    3

    7

    Rate select

    No connection

     

    8

    LOS

    Rx loss of signal, Open Collector Output, active “H”

    4

    9

    VeeR

    Rx ground

     

    10

    VeeR

    Rx ground

     

    11

    VeeR

    Rx ground

     

    12

    RD-

    Inverse received data out

    5

    13

    RD+

    Received data out

    5

    14

    VeeR

    Rx ground

     

    15

    VccR

    Rx power supply

     

    16

    VccT

    Tx power supply

     

    17

    VeeT

    Tx ground

     

    18

    TD+

    Transmit data in

    6

    19

    TD-

    Inverse transmit data in

    6

    20

    VeeT

    Tx ground

     

     

    Notes:

    1.When high, this output indicates a laser fault of some kind. Low indicates normal operation. And should be pulled up with a 4.7 – 10KΩ resistor on the host board.

    2. TX disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7 – 10KΩ resistor. Its states are:

      Low (0 – 0.8V): Transmitter on               (>0.8, < 2.0V): Undefined

      High (2.0V~Vcc+0.3V): Transmitter Disabled   Open: Transmitter Disabled

     

    3.Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7K – 10KΩ resistor on the host board. The pull-up voltage shall be between 2.0V~Vcc+0.3V.

           Mod-Def 0 has been grounded by the module to indicate that the module is present

           Mod-Def 1 is the clock line of two wire serial interface for serial ID

           Mod-Def 2 is the data line of two wire serial interface for serial ID

     

    4.When high, this output indicates loss of signal (LOS). Low indicates normal operation.

     

    5.RD+/-: These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should be terminated with 100Ω (differential) at the user SERDES. The AC coupling is done inside the module and is thus not required on the host board.

     

    6. TD+/-: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ω differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board.

     

    Digital Diagnostic Specifications

     

    The sfp  transceivers can be used in host systems that require either internally or externally calibrated digital diagnostics.  

    Parameter

    Symbol

    Units

    Min.

    Max.

    Accuracy

    Note

    Transceiver temperature

    DTemp-E

    ºC

    -45

    +90

    ±5ºC

    1

    Transceiver supply voltage

    DVoltage

    V

    2.8

    4.0

    ±3%

     

    Transmitter bias current

    DBias

    mA

    2

    80

    ±10%

    2

    Transmitter output power

    DTx-Power

    dBm

    -12

    0

    ±3dB

     

    Receiver average input power

    DRx-Power

    dBm

    -25

    0

    ±3dB

     

     

    Notes:

    1.When Operating temp.=0~70 ºC,the range will be min=-5,Max=+75

    2. The accuracy of the Tx bias current is 10% of the actual current from the laser driver to the laser

    3. Internal/ External Calibration compatible.

     

    Ordering Information

     

    Description

    SFP BIDI,1.25G ,1310/1550nm ,20Km,0~70℃, with Digital Diagnostic Monitor,SC/PC

    SFP BIDI,1.25G ,1550/1310nm ,20Km,0~70℃, with Digital Diagnostic Monitor,SC/PC

    SFP BIDI,1.25G ,1310/1550nm ,20Km,-40~85℃, with Digital Diagnostic Monitor,SC/PC

    SFP BIDI,1.25G ,1550/1310nm ,20Km,-40~85℃, with Digital Diagnostic Monitor,SC/PC

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