PRODUCTS > ACTIVE PRODUCTS > QSFP28 100G LR4
QSFP28 100G LR4
Accelight’s 100Gbps QSFP28 transceiver module is designed for optical communication applications in 100 Gigabit Ethernet links over 10km single mode fiber. This product converts 4 channels of 25Gbps (NRZ) electrical input data to 4 channels of 25Gbps (NRZ) LAN-WDM optical signals. Reversely, on the receiver side, 4 channels of LAN-WDM optical signals of 25Gbps (NRZ) converts to 4 channels of 25Gbps (NRZ) electrical output data. The central wavelengths of 4 channels are members of the frequency grid for 100 GHz spacing and above defined in ITU-T G.694.1 and are spaced at 800 GHz. And per channel operating at 25Gbps. The electrical interface of the module is compliant with the CAUI-4 interface as defined by IEEE 802.3bm, and the form factor, optical/electrical connection and digital diagnostic interface compliant with QSFP28 MSA.

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Product Details
  • Product Features
    Supports 103Gbps
    Single 3.3V Power Supply
    Power dissipation < 3.5Ws
    Up to 10km over SMF
    RoHS compliant
    4*25Gbps DFB-based LAN-WDM transmitter
    QSFP28 MSA Compliant
    PIN and TIA array on the receiver side
    4x25G electrical interface
    LC duplex connector
    Commercial case temperature range of 0°C to 70° .
    I2C interface with integrated Digital Diagnostic Monitoring
  • Applications
    100GBASE-LR4 100G Ethernet
    Data center
  • Ordering information

    Part No.

    Data Rate

    Fiber

    Distance

    Interface

    Temp.

    DDMI

    AQP100C01310010

    103Gbps

    SMF

    10km

    LC

    0~+70 

    Yes


  • Performance Specifications

    Absolute Maximum Ratings

    Parameter

    Symbol

    Min.

    Max.

    Unit

    Storage Temperature

    Ts

    -40

    85

    °C

    Supply Voltage

    Vcc

    -0.5

    3.6

    V

    Data input voltage



    0.8

    V

    Relative Humidity

    RH

    5

    85

    %

    Recommended Operating Conditions

    Parameter

    Sym bol

    Min.

    Typical

    Max.

    Unit

    Operating Case Temperature

    Tc

    -40


    85

    °C

    Power Supply Voltage

    Vcc

    3.135

    3.3

    3.465

    V

    Power   dissipation




    3.5

    W

    Electrical Signal Rate per Channel (NRZ   encoded)



    25.78125


    GBd

    Optical Signal Rate per Channel (NRZ   encoded)



    25.78125


    GBd

    Power supply   Noise




    66

    mVpp

    Receiver   different Data output load


    100



    Ohm

    image.png

    Figure 1: Transceiver Block Diagram

    image.png

    Figure 2: Application Reference Diagram

    Transmitter

    As shown in Figure 1, the transmitter path of the transceiver contains an 4x25 Gbps CAUI-4 electrical input with equalization (EQ) block, DML driver, DML lasers, optical multiplexer and diagnostic monitor. The DML driver and DML lasers converts 4 channels of 25Gbps (NRZ) electrical input data to 4 channels of 25Gbps (NRZ) LAN-WDM optical signals, the optical multiplexer multiplexes them into a single channel for 100Gb/s optical transmission.

     

    Receiver

    As shown in Figure 1, the receiver path of the transceiver contains optical de-multiplexer, four PIN photodiodes, trans-impedance amplifiers (TIA), CDR and 4x25G CAUI-4 compliant electrical output blocks. The module optically de-multiplexes a 100Gb/s optical input into 4 channels of LAN-WDM optical signals, the TIA and CDR converts 4 channels of 25Gbps (NRZ) LAN-WDM optical signals to 4 channels of 25Gbps (NRZ) electrical output data.

     

    High Speed Electrical Signal Interface

    The interface between an ASIC/SerDes and the QSFP28 module shown in Figure 2. The high speed signal lines are internally AC-coupled and the electrical inputs are internally terminated to 100 Ohms differential. All transmitter and receiver electrical channels are compliant to module CAUI-4 specifications per IEEE 802.3bm.

     

    Control Signal Interface

    The control signal interface compliant with QSFP28 MSA. The following pin are provided to control module or display the module status: ModPrsL, IntL/RxLOS, ResetL, LPMode/TxDis. In addition, there is an industry standard two wire serial interface scaled for 3.3 volt LVTTL. The definition of control signal interface and the registers of the serial interface memory are defined in the Control Interface & Memory Map section.

     

    Handling and Cleaning

    Exposure to current surges and overvoltage events can cause immediate damage to the transceiver module. Observe the precautions for normal operation of electrostatic discharge sensitive equipment; Attention shall also be paid to limiting transceiver module exposure to conditions beyond those specified in the absolute maximum ratings.

    Optical connectors include female connectors. These elements will be exposed as long as the cable or port plug is not inserted. At this time, always pay attention to protection.

    Each module is equipped with a port guard plug to protect the optical port. The protective plug shall always be in place whenever the optical fiber is not inserted. Before inserting the optical fiber, it is recommended to clean the end of the optical fiber connector to avoid contamination of the module optical port due to dirty connector. If contamination occurs, use standard LC port cleaning methods.

    General Electrical Characteristics

    Parameter

    Symbol

    Min.

    Typical

    Max.

    Unit

    Transceiver Power Consumption



    3

    3.5

    W

    Transceiver Power Supply Total Current



    960

    1120

    mA

    AC Coupling Internal Capacitor



    0.1


    μF

    Reference Points

    Test Point

    Description

     

    TP0   to TP5

    The channel including the transmitter and receiver differential   controlled impedance

    printed circuit   board insertion loss and the cable assembly insertion loss.

     

    TP1   to TP4

    All cable assembly measurements are made between TP1 and TP4 as   illustrated in

    Figure 3.

     

    TP0 to TP2 TP3

    to   TP5

    A mated connector pair has been included in both the   transmitter and receiver specifications defined in 802.3bj 92.8.3 and 92.8.4.   The recommended maximum insertion loss from TP0 to TP2 or from TP3 to TP5   including the test fixture is provided in

    802.3bj 92.8.3.6

     

    TP2

    Unless specified otherwise, all transmitter measurements defined in   802.3bj 92.8.3 are

    made at TP2 utilizing the   test fixture specified in 92.11.1.

     

    TP3

    Unless specified   otherwise, all receiver measurements and tests defined in 802.3bj 92.8.4

    are   made at TP3 utilizing the test fixture specified in 92.11.1.

    image.png


    Figure 3: IEEE 802.3bj 100GBASE-CR4 link

    image.png

    Figure 4: IEEE 802.3bs CAUI-4 compliance points TP1a, TP4a

    image.png










    High Speed Electrical Input Characteristics

    Parameter

    Test

    Point

    Min.

    Typical

    Max.

    Unit

    Conditions

    Signaling Rate, Per Lane   (NRZ encoded)

    TP1


    25.78125


    GBd

    +/- 100 ppm

    Differential pk-pk Input   Voltage

    Tolerance

    TP1a

    900



    mV


    Differential input Return Loss

    (min)

    TP1


    Equation(83E- 5)


    dB

    802.3bs

    Differential to   common mode input return loss (min)

    TP1


    Equation(83E- 6)


    dB

    802.3bs

    SDifferential Termination   Mismatch

    TP1



    10

    %


    Module stressed input test

    TP1a






    Single-ended voltage tolerance

    range

    TP1a

    -0.4


    3.3

    V


    DC common-mode output   voltage

    TP1

    -350


    2850

    mV


    Module stressed input test







    Eye   width



    0.46


    UI


    Applied pk-pk sinusoidal   jitter



    Table   88-

    13



    802.3bs

    Eye height



    95


    mV


    High Speed Electrical Output CharacteristicS

    Parameter

    Test   Point

    Min.

    Typical

    Max.

    Unit

     

    Signaling Rate, Per   Lane(range)

     

    TP4


    25.78125 ± 100

    ppm


     

    GBd

    Differential peak-to-peak input voltage

    tolerance

    TP4



    900

    mV

    Eye width

    TP4

    0.57



    UI

     

    Eye height

     

    TP4

     

    228



     

    mV

    Vertical Eye Closure

     

    TP4



     

    5.5

     

    dB

    Differential output Return   Loss (min)

    TP4


    Equation(83E-2)


    dB

    Common to Differential Mode Conversion Return Loss (min)

    TP4


    Equation(83E-3)


    dB

    Differential termination   mismatch

    TP4



    10

    %

    Transition Time (20% to   80%)

    TP4

    12



    %

    Common mode voltage

    TP4

    -0.35


    2.85

    V

    Optical Characteristics

    High Speed Optical Transmitter Characteristics

    Parameter

    Symbol

    Min.

    Typical

    Max.

    Unit

    Signaling speed per lane



    25.78125


    Gbps

    Modulation   format



    NRZ



    Lane_0   Center Wavelength

    λC0

    1294.53

    1295.56

    1296.59

    nm

    Lane_1   Center Wavelength

    λC1

    1299.02

    1300.05

    1301.09

    nm

    Lane_2 Center Wavelength

    λC2

    1303.54

    1304.58

    1305.63

    nm

    Lane_3 Center Wavelength

    λC3

    1308.09

    1309.14

    1310.19

    nm

    Side-mode   Suppression Ratio

    SMSR

    30



    dB

    Extinction ratio

    ER

    4



    dB

    Total   average launch power




    10.5

    dBm

    Average launch power

    TxAVG

    -4.3


    4.5

    dBm

    OMA per lane

    TxOMA

    -1.3


    4.5

    dBm

    Difference in launch power between any   two lanes (OMAouter)




    5

    dB

    Transmitter and dispersion   penalty (TDP), each lane




    2.2

    dB

    Launch   power in OMA minus TDP, each lane


    -2.3



    dBm

    RIN20 OMA




    -130

    dB/Hz

    Average launch power of OFF transmitter




    -30

    dBm

    Optical return loss tolerance




    20

    dB

    Transmitter Reflectance




    -12

    dB

    High Speed Optical Receiver Characteristics

    Parameter

    Symbol

    Min.

    Typical

    Max.

    Unit

    Signaling speed per lane



    25.78125


    Gbps

    Modulation format



    NRZ



    Lane_0 Center Wavelength

    λC0

    1294.53

    1295.56

    1296.59

    nm

    Lane_1 Center Wavelength

    λC1

    1299.02

    1300.05

    1301.09

    nm

    Lane_2 Center Wavelength

    λC2

    1303.54

    1304.58

    1305.63

    nm

    Lane_3 Center Wavelength

    λC3

    1308.09

    1309.14

    1310.19

    nm

    Damage threshold


    5.5



    dBm

    Average receiver power per lane


    -10.6


    4.5

    dBm

    Receive Power (OMA) per Lane

    RxOMA



    4.5

    dBm

    Receive Sensitivity in OMA per Lane

    Rxsens



    -8.6

    dBm

    Receiver 3 dB electrical upper cutoff frequency,

    per lane




    31

    GHz

    Stressed Receiver Sensitivity (OMA) per Lane

    RXSRS



    -6.8

    dBm

    Optical Return Loss

    ORL



    -26

    dB

    LOS Assert

    LOSA

    -25



    dBm

    LOS De-Assert

    LOSD



    -12

    dBm

    LOS Hysteresis


    0.5



    dB

    RSSI accuracy


    -2


    +2

    dB

    QSFP28 Transceiver Electrical Pad Layout

    image.png

    Pin Descriptions

    Pin

    Logic

    Symbol

    Description

    Plug   Sequence

    Notes

    1


    GND

    Ground

    1

    1

    2

    CML-I

    Tx2n

    Transmitter   Inverted Data Input

    3


    3

    CML-I

    Tx2p

    Transmitter Non-Inverted Data Input

    3


    4


    GND

    Ground

    1

    1

    5

    CML-I

    Tx4n

    Transmitter   Inverted Data Input

    3


    6

    CML-I

    Tx4p

    Transmitter Non-Inverted Data Input

    3


    7


    GND

    Ground

    1

    1

    8

    LVTTL-I

    ModSelL

    Module Select

    3


    9

    LVTTL-I

    ResetL

    Module Reset

    3


    10


    VccRx

    +3.3V Power Supply Receiver

    2

    2

    11

    LVCMOS-

    I/O

    SCL

    Two-wire serial interface clock

    3


    12

    LVCMOS-

    I/O

    SDA

    Two-wire serial interface data

    3


    13


    GND

    Ground

    1

    1

    14

    CML-O

    Rx3p

    Receiver Non-Inverted Data Output

    3


    15

    CML-O

    Rx3n

    Receiver   Inverted Data Output

    3


    16


    GND

    Ground

    1

    1

    17

    CML-O

    Rx1p

    Receiver Non-Inverted Data Output

    3


    18

    CML-O

    Rx1n

    Receiver Inverted Data Output

    3


    19


    GND

    Ground

    1

    1

    20


    GND

    Ground

    1

    1

    21

    CML-O

    Rx2n

    Receiver   Inverted Data Output

    3


    22

    CML-O

    Rx2p

    Receiver Non-Inverted Data Output

    3


    23


    GND

    Ground

    1

    1

    24

    CML-O

    Rx4n

    Receiver   Inverted Data Output

    3


    25

    CML-O

    Rx4p

    eceiver Non-Inverted Data Output

    3


    26


    GND

    Ground

    1

    1

    27

    LVTTL-O

    ModPrsL

    Module Present

    3


     

    28

     

    LVTTL-O

    IntL/ RxLOSL

    Interrupt. Optionally configurable   as RxLOSL via the management

    interface   (SFF-8636).

     

    3



    29


    VccTx

    +3.3V   Power supply transmitter

    2

    2

    30


    Vcc1

    +3.3V   Power supply

    2

    2

     

    31

     

    LVTTL-I

    LPMode/ TxDis

    Low Power Mode. Optionally

    configurable as TxDis via the management   interface (SFF-8636).

     

    3


    32


    GND

    Ground

    1

    1

    33

    CML-I

    Tx3p

    Transmitter Non-Inverted Data input

    3


    34

    CML-I

    Tx3n

    Transmitter   Inverted Data Input

    3


    35


    GND

    Ground

    1

    1

    36

    CML-I

    Tx1p

    Transmitter Non-Inverted Data Input

    3


    37

    CML-I

    Tx1n

    Transmitter   Inverted Data Input

    3


    38


    GND

    Ground

    1

    1

    1: GND is the symbol for   signal and supply (power) common for the module. All are common within the   module and all module voltages are referenced to this potential unless   otherwise noted. Connect them

    directly   to the host board signal-common ground plane.

    2: VccRx, Vcc1 and VccTx   are the receiving and transmission power suppliers and applied

    concurrently.   VccRx, Vcc1 and VccTx are internally connected within the module in any   combination. Vcc contacts in SFF-

    8662 and SFF-8672 each have a steady state current   rating of 1A.

    image.png

    Figure 7: Host Board Power Supply Filter


  • Mechanical Specifications

    image.png

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