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    1.25Gbps Tx1490/Rx1310nm 20km SFP Bi-Directional Transceiver

    1.25Gbps Tx1490/Rx1310nm 20km Compatible SFP Bi-Directional Transceiver

    1.25Gbps SFP Bi-Directional Transceiver, 20KM Reach, LC Connector SMF Tx1490nm/Rx1310nm, fully tested compatible for over 100 vendors.

    Features

    • Single Mode bi-directional Transmission
    • SFP Multi-source Package with LC Receptacle
    • Up to 1.25Gb/s Data Links
    • Hot-Pluggable Capability
    • Up to 20km on 9/125μm SMF
    • Single +3.3V Power Supply
    • Built-in WDM
    • Isolation > 30dB, Cross Talk < -45dB
    • Monitoring Interface Compliant with SFF-8472
    • Metal Enclosure, Excellent EMI & ESD Protection
    • Compliant with Specifications for IEEE802.3Z
    • Compliant with Bellcore TA-NWT-000983
    • Eye Safety Designed to Meet Laser Class1, Compliant with IEC60825-1
    • RoHS Compliant

     

     

    Applications

    • Gigabit Ethernet
    • Fiber Channel
    • WDM Application

     

     

    Description

      The Bi-Directional transceiver is a high performance, cost effective module ,which is compliant with LC Optics interface with built in WDM for Bi-Directional serial optical data communication applications. This module is designed for Single-Mode single fiber, operates at the normal wavelength of 1490/1310nm.

    Standard AC coupled CML for high speed signal and LVTTL control and monitor signals.

    The transmitter section incorporates FP and driver IC with temperature compensation and automatic power control circuit, which make the transmitter section output power and Extinction ration stabled in operation temperature.

    The receiver section incorporates an efficient InGaAs photodiode and transimpedance with AGC for wide dynamic range.

    • Absolute Maximum Ratings

    Parameter

    Symbol

    Min.

    Typical

    Max.

    Unit

    Storage Temperature

    TS

    -40

     

    +85

    °C

    Supply Voltage

    VCCT, R

    -0.5

     

    4

    V

    Relative Humidity

    RH

    0

     

    85

    %

    Case Operating Temperature

    Industrial

    Top

    -40

     

    85

    C

    Extended

    -5

     

    85

    Commercial

    0

     

    70

     

     

    • Recommended Operating Environment:

    Parameter

    Symbol

    Min.

    Typical

    Max.

    Unit

    Case operating Temperature

    Industrial

    TC

     

     

     

     

    Extended

     

     

     

     

    Commercial

    0

     

    +70

    °C

    Supply Voltage

    VCCT, R

    3.0

     

    3.6

    V

    Power Supply Rejection

     

    100

     

     

    mVP-P

     

     

    • Electrical Characteristics(TOP = 0 to 70 °C, VCC = 3.0 to 3.60 Volts)

    Parameter

    Symbol

    Min.

    Typical

    Max.

    Unit

    Note

    Supply Voltage

    Vcc

    3.0

    3.30

    3.60

    V

     

    Supply Current

    Icc

     

    160

    280

    mA

     

    Inrush Current

    Isurge

     

     

    Icc+30

    mA

     

    Maximum Power

    Pmax

     

     

    1.0

    W

     

    Transmitter Section:

     

    Input differential impedance

    Rin

    90

    100

    110

    Single ended data input swing

    Vin PP

    200

     

    1200

    mVp-p

     

    Transmit Disable Voltage

    VD

    Vcc – 1.3

     

    Vcc

    V

    2

    Transmit Enable Voltage

    VEN

    Vee

     

    Vee+ 0.8

    V

     

    Transmit Disable Assert Time

    Tdessert

     

     

    10

    us

     

    Receiver Section:

     

    Single ended data output swing

    Vout,pp

    300

     

    1000

    mv

    3

    Data output rise time

    tr

     

     

    150

    ps

    4

    Data output fall time

    tf

     

     

    150

    ps

    4

    LOS Fault

    Vlosfault

    Vcc – 0.5

     

    VCC_host

    V

    5

    LOS Normal

    Vlos norm

    Vee

     

    Vee+0.5

    V

    5

    Power Supply Rejection

    PSR

    100

     

     

    mVpp

    6

    Deterministic Jitter Contribution

    RXΔDJ

     

     

    51.7

    ps

    7

    Total Jitter Contribution

    RXΔTJ

     

     

    122.4

    ps

     

     

    Note:

    1. AC coupled.
    2. Or open circuit.
    3. Into 100 ohm differential termination.
    4. 20 – 80 %
    5. LOS is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
    6. All transceiver specifications are compliant with a power supply sinusoidal modulation of 20 Hz to 1.5MHz up to specified value applied through the power supply filtering network shown on page 23 of the Small Form-factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA), September 14, 2000.
    7. Measured with DJ-free data input signal. In actual application, output DJ will be the sum of input DJ and . DJ.

     

     

    • Optical Parameters(TOP = 0 to 70 °C, VCC = 3.0 to 3.60 Volts)

    Parameter

    Symbol

    Min.

    Typical

    Max.

    Unit

    Note

    Transmitter Section:

    Center Wavelength

    λc

    1480

    1490

    1500

    nm

    1

    Spectral Width

    σ

     

     

    1

    nm

     

    Optical Output Power

    Pout

    -9

     

    -3

    dBm

    2

    Optical Rise/Fall Time

    tr / tf

     

     

    160

    ps

    3

    Extinction Ratio

    ER

    9

     

     

    dB

     

    Deterministic Jitter Contribution

    TXΔDJ

     

     

    56.5

    ps

    4

    Total Jitter Contribution

    TXΔTJ

     

     

    119

    ps

     

    Eye Mask for Optical Output

    Compliant with Eye Mask Defined in IEEE 802.3 standard

     

    Relative Intensity Noise

    RIN

     

     

    -120

    dB/Hz

     

    Receiver Section:

     

    Optical Input Wavelength

    1270

    1310

    1330

    nm

     

    Optical Input Power

    Pin

    -23

     

    -3

    dBm

    5.6

    Receiver Reflectance

     

    12

     

     

    dB

     

    Receiver Overload

    Pol

     

     

    -3

    dBm

    5.6

    RX Sensitivity

    Sen

     

     

    -23

    dBm

    5.6

    RX_LOS Assert

    LOS A

    -34

     

     

    dBm

     

    RX_LOS Deassert

    LOS D

     

     

    -24

    dBm

     

    RX_LOS Hysteresis

    LOS H

     

    2

    2.5

    dB

     

    General Specifications

    Data Rate

    BR

    1062

     

    1250

    Mb/s

     

    Bit Error Rate

    BER

     

     

    10-12

     

     

    Max. Supported Link Length on 9/125μm SMF@1.25G

    LMAX

     

     

    20

    km

    7

    Total System Budget

    LB

    14

     

     

    dB

    8

     

    Note:

    1. Also specified to meet curves in FC-PI 13.0 Figures 18 and 19, which allow trade-off between wavelength spectral width.
    2. Class 1 Laser Safety per FDA/CDRH and EN (IEC) 60825 regulations.
    3. Unfiltered, 20-80%. Complies with IEEE 802.3 (Gig. E), FC 1x and 2x eye masks when filtered.
    4. Measured with DJ-free data input signal. In actual application, output DJ will be the sum of input DJ and . DJ.
    5. Measured with conformance signals defined in FC-PI 13.0 specifications.
    6. Measured with PRBS 27-1 at 10-12 BER
    7. Dispersion limited per FC-PI Rev. 13
    8. .Attenuation of 0.45 dB/km is used for the link length calculations. Distances are indicative only. Please refer to the Optical Specifications in Table IV to calculate a more accurate link budget based on specific conditions in your application.
    • Digital Diagnostic Monitor Characteristics

    The following digital diagnostic characteristics are defined over the Recommended Operating Environment unless otherwise specified. It is compliant to SFF8472 Rev10.2 with internal calibration mode. For external calibration mode please contact our sales stuff.

     

    Parameter

    Symbol

    Min.

    Max.

    Unit

    Temperature monitor absolute error

    DMI_Temp

    -3

    3

    degC

    Laser power monitor absolute error

    DMI_TX

    -3

    3

    dB

    RX power monitor absolute error

    DMI_RX

    -3

    3

    dB

    Supply voltage monitor absolute error

    DMI_VCC

    -0.1

    0.1

    V

    Bias current monitor absolute error

    DMI_Ibias

    -10%

    10%

    mA

     

     

    Figure 4. SFP Host Board Mechanical Layout(Cont)

     

    • Pin Description:

    Pin No

    Name

    Function

    Plug Seq

    Notes

    1

    VeeT

    Transmitter Ground

    1

    1

    2

    TX Fault

    Transmitter Fault Indication

    3

     

    3

    TX Disable

    Transmitter Disable

    3

    2

    4

    MOD-DEF2

    Module Definition

    2

    3

    5

    MOD-DEF1

    Module Definition 1

    3

    3

    6

    MOD-DEF0

    Module Definition 0

    3

    3

    7

    Rate Select

    Not Connected

    3

    4

    8

    LOS

    Loss of Signal

    3

    5

    9

    VeeR

    Receiver Ground

    1

    1

    10

    VeeR

    Receiver Ground

    1

    1

    11

    VeeR

    Receiver Ground

     

    1

    12

    RD-

    Inv. Received Data Out

    3

    6

    13

    RD+

    Received Data Out

    3

    6

    14

    VeeR

    Receiver Ground

    3

    1

    15

    VccR

    Receiver Power

    2

    1

    16

    VccT

    Transmitter Power

    2

     

    17

    VeeT

    Transmitter Ground

    1

     

    18

    TD+

    Transmit Data In

    3

    6

    19

    TD-

    Inv. Transmit In

    3

    6

    20

    VeeT

    Transmitter Ground

    1

     

     

    Notes:

    1. Circuit ground is internally isolated from chassis ground.
    2. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.
    3. Should be pulled up with 4.7k - 10 kohms on host board to a voltage between 2.0V and 3.6V.MOD_DEF(0) pulls line low to indicate module is plugged in.
    4. Rate select is not used
    5. LOS is open collector output. Should be pulled up with 4.7k – 10 kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.
    6. AC Coupled

     

     

    • Serial ID Memory Contents:

    Data Address

    Length

    (Byte)

    Name of

    Length

    Description and Contents

    Base ID Fields

    0

    1

    Identifier

    Type of Serial transceiver (03h=SFP)

    1

    1

    Reserved

    Extended identifier of type serial transceiver (04h)

    2

    1

    Connector

    Code of optical connector type (07=LC)

    3-10

    8

    Transceiver

    Gigabit Ethernet 1000Base-BX

    11

    1

    Encoding

    8B10B (01h)

    12

    1

    BR,Nominal

    Nominal baud rate, unit of 100Mbps

    13

    1

    Reserved

    (0000h)

    14

    1

    Length(9um,km)

    Link length supported for 9/125um fiber, units of km

    15

    1

    Length(9um)

    Link length supported for 9/125um fiber, units of 100m

    16

    1

    Length(50um)

    Link length supported for 50/125um fiber, units of 10m

    17

    1

    Length(62.5um)

    Link length supported for 62.5/125um fiber, units of 10m

    18

    1

    Length(Copper)

    Link length supported for copper, units of meters

    19

    1

    Reserved

     

    20-35

    16

    Vendor Name

    SFP vendor name:

    36

    1

    Reserved

     

    37-39

    3

    Vendor OUI

    SFP transceiver vendor OUI ID

    40-55

    16

    Vendor PN

    Part Number: “BTxxxx” (ASCII)

    56-59

    4

    Vendor rev

    Revision level for part number

    60-61

    2

    Wavelength

    Laser wavelength

    62

    1

    Reserved

     

    63

    1

    CCID

    Least significant byte of sum of data in address 0-62

    Extended ID Fields

    64-65

    2

    Option

    Indicates which optical SFP signals are implemented(001Ah = LOS, TX_FAULT, TX_DISABLE all supported)

    66

    1

    BR, max

    Upper bit rate margin, units of %

    67

    1

    BR, min

    Lower bit rate margin, units of %

    68-83

    16

    Vendor SN

    Serial number (ASCII)

    84-91

    8

    Date code

    Manufacturing date code

    92

    1

    Diagnostic Type

    Diagnostics

    93

    1

    Enhanced Options

    Diagnostics

    94

    1

    SFF-8472

    Diagnostics

    95

    1

    CCEX

    Check code for the extended ID Fields (addr. 64 to 94)

    Vendor Specific ID Fields

    96-127

    32

    Readable

    Vendor specific date, read only

     

     

    • Diagnostics Memory Contents(A2h):

    Data Address

    Length

    (Byte)

    Name of Length

    Description and Contents

    Diagnostic and control/status fields

    0-39

    40

    A/W Thresholds

    Diagnostic Flag Alarm and Warning Thresholds

    40-55

    16

    Unallocated

     

    56-91

    16

    Ext Cal Constants

    Diagnostic calibration constants for optional External Calibration

    92-94

    3

    Unallocated

     

    95

    1

    CC_DMI

    Check code for Base Diagnostic Fields (addresses 0 to 94)

    96-105

    10

    Diagnostics

    Diagnostic Monitor Data (internally or externally calibrated)

    106-109

    4

    Unallocated

     

    110

    1

    Status/Control

    Optional Status and Control Bits

    111

    1

    Reserved

    Reserved for SFF-8079

    112-113

    2

    Alarm Flags

    Diagnostic Alarm Flag Status Bits

    114-115

    2

    Unallocated

     

    116-117

    2

    Warning Flags

    Diagnostic Warning Flag Status Bits

    118-119

    2

    Ext Status/Control

    Extended module control and status bytes

    General use fields

    120-127

    8

    Vendor Specific

    Vendor specific memory addresses

    128-247

    120

    User EEPROM

    User writable non-volatile memory

    248-255

    8

    Vendor Control

    Vendor specific control addresses

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