PRODUCTS > ACTIVE PRODUCTS > 100G > QSFP28 100G FR1
QSFP28 100G FR1
Accelight’s QSFP28 transceiver module is designed for use in 100 Gigabit Ethernet links over 2km single mode fiber. The module incorporates 1 channel optical signal, on 1311nm center wavelength, operating at 100Gbps data rate. This module can convert 4 channels of 25Gbps (NRZ) electrical input data to 1 channel of 100Gbps (PAM4) optical signal, and also can convert 1 channel of 100Gbps (PAM4) optical signal to 4 channels of 25Gbps (NRZ) electrical output data. The electrical interface of the module is compliant with the OIF CEI-28G-VSR and QSFP28 MSA..

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Product Details
  • Product Features
    Supports 100Gbps
    Single 3.3V Power Supply
    100G Lambda MSA 100G-FR
    Power dissipation < 4.5W
    Up to 2km over SMF with FEC
    RoHS compliant
    QSFP28 MSA Compliant
    4x25Gbps Electrical interface
    LC Duplex connector
    Commercial case temperature range of 0°C to 70°
    I2C interface with integrated Digital Diagnostic Monitoring
  • Applications
    100G Ethernet
    Data center
  • Ordering information

    Part No.

    Data Rate

    Fiber

    Distance

    Interface

    Temp.

    DDMI

    CMIS

    AQP100C01310002

    100Gbps

    SMF

    2km

    LC

    0~+70

    Yes

    CMIS4.0


  • Performance Specifications

    Absolute Maximum Ratings

    Parameter

    Symbol

    Min.

    Max.

    Unit

    Storage   Temperature

    Ts

    -40

    85

    °C

    Supply Voltage

    Vcc

    -0.5

    3.6

    V

    Damage   threshold

    Rxdmg

    5.5


    dBm

    Recommended Operating Conditions

    Parameter

    Symbol

    Min.

    Typical

    Max.

    Unit

    Operating case   temperature

    Tc

    0


    70

    °C

    Power supply   voltage

    Vcc

    3.135

    3.3

    3.465

    V

    Operating   relative humidity

    RH

    5


    85

    %

    Power   dissipation

    PD



    4.5

    W

    Electrical   signal rate



    25.78125


    GBd

    Optical signal   rate



    53.125


    GBd

    Power supply   noise




    66

    mVpp

    Receiver   differential 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 a 4x25Gbps CAUI-4 electrical input, integrated electrical multiplexer, EML driver, EML Laser and diagnostic monitor. The integrated electrical multiplexer converts 4 channels of 25Gbps (NRZ) electrical input data to 1 channel of 100Gbps (PAM4) optical signal.

    Receiver

    As shown in Figure 1, the receiver path of the transceiver contains a PIN photodiode, trans-impedance amplifier (TIA), integrated de-multiplexer and 4x25Gbps CAUI-4 compliant electrical output block. The integrated demultiplexer converts 1 channel of 100Gbps (PAM4) optical signal to 4 channels of 25Gbps (NRZ) electrical output data.

    High Speed Electrical Signal Interface

    The interface between QSFP28 module and Host ASIC is 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 CAUI-4 specification per IEEE 802.3cd.

    Control Signal Interface

    The module has the following low speed signals for control and status: ModSelL, ResetL, LPMode/TxDis, ModPrsL, IntL/RxLOSL. In addition, there is an industry standard two wire serial interface scaled for 3.3V LVTTL. The definition of control signal interface and the registers of the serial interface memory are further 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, and attention should also be taken to restrict exposure to the conditions defined in the absolute maximum ratings.

    Optical connectors will be exposed as long as the port plug is not inserted, so always pay attention to protection. Each module is equipped with a port guard plug to protect the optical ports. 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




    4.5

    W

    Transceiver Power Supply   Total Current




    1298.7

    mA

    AC Coupling Internal   Capacitor



    0.1


    μF

    Reference Points

    Test   Point

    Description

     

    TP0

    Host ASIC   transmitter output at ASIC package contact.

     

    TP1

    Input to module compliance   board through mated module compliance board and

    module   connector. Used to test module input.

     

    TP1a

    Host ASIC transmitter output through the host board and host card edge   connector at the output of the host compliance board. Also used to calibrate   module input

    compliance   signals.

     

    TP4

    Module output   through the compliance board connectors at the output of the

    module   compliance board. Also used to calibrate host input compliance signals.

     

    TP4a

    Input   to host compliance board. Used to test host input.

     

    TP5

    Input to host   ASIC.

     

    TP5a

    Far end module output   through a reference channel.

    image.png

    Figure 3: Reference points and compliance boards

    image.png

    Figure 4: IEEE 802.3bs CAUI-8 compliance points TP1a, TP4a

    image.png

     

    Figure 5: IEEE 802.3 CAUI-4 compliance points TP1, TP4

    High Speed Electrical Input Characteristic


    Parameter

    Test

    Point

    Min.

    Typical

    Max.

    Unit

    Conditions

    Differential   peak-peak input voltage tolerance

    TP1a

    900



    mVp-p


    Differential   input impedance

    TP1

    90

    100

    110

    Ohm


    Output   rise/fall time

    TP1a

    10



    ps

    20%~80%

    Eye width

    TP1a

    0.46



    UI

    1E-15

    Eye   height , differential

    TP1a

    95



    mV

    1E-15

    DC common mode   voltage (Vcm)

    TP1

    -350


    2850

    mV


    High Speed Electrical Output Characteristics


    ParamPareter

    Test

    Point

    Min.

    Typical

    Max.

    Unit

    Conditions

    Differential   peak-peak output voltage

    TP4



    900

    mVp-

    p


    Differential output   impedance

    TP4

    90

    100

    110

    Ohm


    Output   rise/fall time

    TP4

    12



    ps

    20%~80%

     

    Eye   width

     

    TP4

     

    0.57



     

    UI

     

    1E-15

    Eye height   differential

     

    TP4

     

    228



     

    mV

     

    1E-15

    DC common mode   voltage (Vcm)

    TP4

    -350


    2850

    mV


    Optical Characteristics


    High Speed Optical Transmitter Characteristics

    Parameter

    Symbol

    Min.

    Typical

    Max.

    Unit

    Signaling speed



    53.125


    Gbaud

    Modulation   format



    PAM4



    Center   wavelength

    λc

    1304.5

    1311

    1317.5

    nm

    Side-mode   suppression ratio

    SMSR

    30



    dB

    Extinction   ratio

    ER

    3.5



    dB

    Transmit OMA

    TxOMA

    -0.2


    4.2

    dBm

    Transmit   average

    TxAVG

    -2.4


    4

    dBm

    Launch power in OMAouter minus TDECQ


    -1.6



    dBm

    Launch power in OMAouter minus TDECQ


    -1.5



    dBm

    Transmitter and   dispersion eye closure

    TDECQ



    3.4

    dB

    Optical return loss   tolerance




    17.1

    dB


    High Speed Optical Receiver Characteristics

    Parameter

    Symbol

    Min.

    Typical

    Max.

    Unit

    Signaling speed



    53.125


    Gbaud

    Center wavelength

    λc

    1304.5

    1311

    1317.5

    nm

    Damage threshold

    Rxdmg

    5.5



    dBm

    Receive power (OMAouter)

    RxOMA



    4.7

    dBm

    Average receive power

    RxAVG

    -6.4


    4.5

    dBm

    Receiver sensitivity   (OMAouter)

    SenOMA



    Max      (-4.5,

    SECQ-5.9)

    dBm

    Receiver reflectance




    -26

    dB

    LOS Assert

    LOSA

    -15



    dBm

    LOS   De-Assert

    LOSD



    -12

    dBm

    LOS hysteresis


    0.5



    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

    34

    CML-I

    Tx3n

    Transmitter Inverted Data   Input

    3


    35


    GND

    Ground

    1

    1

    36

    CML-I

    Tx1p

    Transmitter   Non-Inverted Data Input

    3


    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.pngimage.png 


     



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