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    155Mbps 1550nm 120km DFB SFP Optical Transceiver

    155Mbps 1550nm 120km DFB LC SFP Optical Transceiver

    155Mbps 1550nm 120km DFB SFP Optical Transceiver

    Features
    * Data-rate of 155Mbps operation
    * DFB 1550nm wavelengths laser and PIN photodetector for 120km 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
    Industrial : -40 to +85°C

    Applications

    * Gigabit Ethernet

    * 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 data-rate of 155Mbps and 120km transmission distance with SMF.

     

    The transceiver consists of three sections: a uncooled 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

    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

    95

    %

     

     

    Recommended Operating Conditions

    Table 2 - Recommended Operating Conditions

    Parameter

    Symbol

    Min

    Typical

    Max

    Unit

    Operating Case Temperature

    Standard

    Tc

    0

     

    +70

    °C

    Power Supply Voltage

    Vcc

    3.13

    3.3

    3.47

    V

    Power Supply Current

    Icc

     

     

    300

    mA

    Data Rate

     

     

    155

     

    Mbps

     

     

     

     

     

     

     

     

    Optical and Electrical Characteristics

    Table 4 - Optical and Electrical Characteristics

    Parameter

    Symbol

    Min

    Typical

    Max

    Unit

    Notes

    Transmitter

    Centre Wavelength

    λc

    1520

    1550

    1580

    nm

     

    Spectral Width (-20dB)

    ∆λ

     

     

    1

    nm

     

    Side Mode Suppression Ratio

    SMSR

    30

     

     

    dB

     

    Average Output Power

    Pout

    0

     

    5

    dBm

    1

    Extinction Ratio

    ER

    10

     

     

    dB

     

    Jitter Generation (RMS)

     

     

     

    0.01

    UI

     

    Jitter Generation (PK-PK)

     

     

     

    0.1

    UI

     

    Output Optical Eye

    Compliant Telcordia GR-253-CORE and ITU-T G.957

     

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

    tr/tf

     

     

    0.26

    ns

     

    Data Input Swing Differential

    VIN

    300

     

    1860

    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

     

     

     

    -34

    dBm

    3

    Receiver Overload

     

    -9

     

     

    dBm

    3

    LOS De-Assert

    LOSD

     

     

    -38

    dBm

     

    LOS Assert

    LOSA

    -45

     

     

    dBm

     

    LOS Hysteresis

     

    1

     

    4

    dB

     

    Data Output Swing Differential

    Vout

    370

     

    1800

    mV

    4

    LOS

    High

    2.0

     

    Vcc

    V

     

    Low

    0

     

    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 @155Mbps, BER ≤1×10-12.
    4. Internally AC-coupled.

     

     

    Timing and Electrical

    Table 5 - 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

     

     

     

    EEPROM Information

     

    The SFP MSA defines a 256-byte memory map in EEPROM describing the transceiver’s capabilities, standard interfaces, manufacturer, and other information, which is accessible over a 2 wire serial interface at the 8-bit address 1010000X (A0h). The memory contents refer to Table 6.

    Table 6 - EEPROM Serial ID Memory Contents (A0h)

    Addr.

    Field Size (Bytes)

    Name of Field

    Hex

    Description

    0

    1

    Identifier

    03

    SFP

    1

    1

    Ext. Identifier

    04

    MOD4

    2

    1

    Connector

    07

    LC

    3—10

    8

    Transceiver

    00 08 04 00 00 00 00 00

    OC-3,Single mode long reach

    11

    1

    Encoding

    03

    NRZ

    12

    1

    BR, nominal

    02

    155Mbps

    13

    1

    Reserved

    00

     

    14

    1

    Length (9um)-km

    78

    120km

    15

    1

    Length (9um)

    FF

    120km

    16

    1

    Length (50um)

    00

     

    17

    1

    Length (62.5um)

    00

     

    18

    1

    Length (copper)

    00

     

    19

    1

    Reserved

    00

     

    20—35

    16

    Vendor name

    47 69 67 61 BT 69 67 68 74 20 20 20 20 20 20 20

    "BTON"(ASCⅡ)

    36

    1

    Reserved

    00

     

    37—39

    3

    Vendor OUI

    00 00 00

     

    40—55

    16

    Vendor PN

    47 50 2D 35 35 30 33 2D 31 32 43 44 20 20 20 20

    “BT-OC3-120D ”(ASCⅡ)

    56—59

    4

    Vendor rev

    xx xx xx xx

     xx.xx revision (ASCⅡ)

    60-61

    2

    Wavelength

    0A AA

    1550nm

    62

    1

    Reserved

    00

     

    63

    1

    CC BASE

    xx

    Check sum of bytes 0 - 62

    64—65

    2

    Options

    00 1A

    LOS,TX_FAULT and TX_DISABLE

    66

    1

    BR, max

    00

     

    67

    1

    BR, min

    00

     

     

     

    68—83

    16

    Vendor SN

    xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx

    ASCⅡ

    84—91

    8

    Vendor date code

    xx xx xx xx xx xx 20 20

    Year(2 bytes),Month(2 bytes),Day(2 bytes)

    92

    1

    Diagnostic type

    xx

    Diagnostics

    93

    1

    Enhanced option

    80

    Diagnostics(Optional Alarm/warning flags)

    94

    1

    SFF-8472

    01

    Diagnostics(SFF-8472 Rev 9.3)

    95

    1

    CC EXT

    xx

    Check sum of bytes 64 - 94

    96—255

    160

     

     

     

     

     

    Mechanical Dimensions

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