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SFP Transceiver

1.25G 40KM BIDI LC

●Dual data-rate of 1.25Gbps/1.063Gbps operation 
●1550nm DFB laser and PIN photo detector for 40km transmission
●1310nm DFB laser and PIN photo detector for 40km transmission
●BIDI LC/UPC type pluggable optical interface
●Compliant with SFP MSA and SFF-8472 with simplex LC receptacle
●RoHS compliant and lead-free 
●Single +3.3V power supply 
●Support Digital Diagnostic Monitoring interface
●Case operating temperature Commercial: 0°C to +70°C
Extended: -10°C to +80°C
Industrial: -40°C to +85°C

    APPLICATIONS

    ●Gigabit Ethernet

    ●Fiber Channel●Switch to Switch interface

    ●Switched backplane applications ●Router/Server interface

    Other Optical Links

     

    PRODUCT DESCRIPTIONS

    The SFP-BIDI transceivers are high performance, cost effective modules supporting dual data-rate of 1.25Gbps/1.0625Gbps and 40km transmission distance with SMF.

    The transceiver consists of three sections: a 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.  

    Ordering information

    Data Rate

    (Mbps)

    Media

    Wavelength

    (nm)

    Transmission

    Distance(km)

    Temperature Range

    Tcase)(℃)

    1250

    Single mode

    fiber

    1310/1550(1550/1310)

    40

    0~70

    commercial

    1250

    Single mode

    fiber

    1310/1550(1550/1310)

    40

    -10~80

    extended

    1250

    Single mode

    fiber

    1310/1550(1550/1310)

    40

    -45~85

    industrial

     

    ABSOLUTE MAXIMUM RATINGS

    Parameter

    Symbol

    Min.

    Max.

    Unit

    Note

    Supply Voltage

    Vcc

    -0.5

    4.0

    V

     

    Storage Temperature

     

    -40

    85

    °C

     

    Relative Humidity

     

          5

    85

    %

     

     

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

    GERERAL OPERATING CHARACTERISTICS

    Parameter

    Symbol

    Min.

    Typ

    Max.

    Unit

    Note

    Data Rate

     

     

     

    1250

     

    Mb/s

     

    Supply Voltage

    Vcc

    3.13

    3.3

    3.47

    V

     

    Supply Current

    Icc5

     

     

    220

    mA

     

    Operating Case Temp.

    Tc

    0

     

    70

    °C

     

    -10

     

    80

    °C

     

    -40

     

    85

    °C

     

     

    ELECTRICAL INPUT/OUTPUT CHARACTERISTICS

    Transmitter

    Parameter

    Symbol

    Min.

    Typ

    Max.

    Unit

    Note

    Diff. input voltage swing

     

    120

     

    820

    mVpp

    1

    Tx Disable input

    H

    VIH

    2.0

     

    Vcc+0.3

    V

     

    L

    VIL

    0

     

    0.8

    Tx Fault output

    H

    VOH

    2.0

     

    Vcc+0.3

    V

    2

    L

    VOL

    0

     

    0.8

    Input Diff. Impedance

    Zin

     

    100

     

    Ω

     

     

     

     

    Receiver

    Parameter

    Symbol

    Min.

    Typ

    Max.

    Unit

    Note

    Diff. output voltage swing

     

    340

    650

    800

    mVpp

    3

    Rx LOS Output

    H

    VOH

    2.0

     

    Vcc+0.3

    V

    2

    L

    VOL

    0

     

    0.8

     

     

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

    Note 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.

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

    .OPTICAL CHARACTERISTICS

     

    Transmitter

     

    arameter

    Symbol

    Min.

    Typ

    Max.

    Unit

    Note

    Operating Wavelength

    λC

    1270

    1310

    1360

    nm

     

    1500

    1550

    1570

    Ave. output power (Enabled)

    Po

    -5

     

    0

    dBm

    1

    Extinction Ratio

    ER

    9

     

     

    dB

    1

    RMS   spectral width

    Δλ

     

     

    4

    nm

     

    Rise/Fall time (20%~80%)

    Tr/Tf

     

     

    0.26

    ps

    2

    Output Eye Mask

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

    Note (1): Measure at 2^23-1 NRZ PRBS pattern

    Note (2): Transmitter eye mask definition

     

    Receiver

     

    Parameter

    Symbol

    Min.

    Typ

    Max.

    Unit

    Note

    Operating Wavelength

     

    1530

    1550

    1570

    nm

     

    1270

    1310

    1360

    Sensitivity

    Psen

     

     

    -22

    dBm

    1

    Min. overload

    Pimax

    -3

     

     

    dBm

     

    LOS Assert

    Pa

    -35

     

     

    dBm

     

    LOS De-assert

    Pd

     

     

    -23

    dBm

      2

    LOS Hysteresis

    Pd-Pa

    0.5

     

    6

    dB

     

     

    Note (1): Measured with Light source 1550nm(1310nm), ER=9dB; BER =<10^-12 @PRBS=2^23-1 NRZ.

    Note (2): When LOS de-asserted, the RX data+/- output is signal output.

    Pin Definitions and Functions

      

     

    PIN#

    Name

    Function

    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

     

     

     

     

    Note 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.

     

    Note 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

    Note 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 VccT or VccR.  

            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

     

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

     

    Note 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.

     

    Note 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.

    Diagnostics

    Diagnostics Specification

    Parameter

    Range

    Unit

    Accuracy

    Calibration

    Temperature

    0 to +70  -40 to +85

     

     

     

    °C

    ±3°C

    Internal/ External

    Voltage

    3.0 to 3.6

     

    V

    ±3%

    Internal/ External

    Bias Current

     

    2 to 80

    mA

    ±10%

    Internal/ External

    TX Power

    -8 to 3

    dBm

    ±3dB

    Internal/ External

    RX Power

    -25 to 0

    dBm

    ±3dB

    Internal/ External

    Ordering Information & Related Products

    SFP BIDI,LC,Tx1310/Rx1550nm 1.25Gbps, 40km, with DDM

    SFP BIDI,LC,Tx1550/Rx1310nm 1.25Gbps, 40km, with DDM

    SFP BIDI,LC,Tx1310/Rx1550nm 1.25Gbps, 40km, without DDM

    SFP BIDI,LC,Tx1550/Rx1310nm 1.25Gbps, 40km, without DDM

     

     

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