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1.25G SFP Module BIDI Single mode Single fiber 20km DDM

TBC-3524-1L2 is a high performance, cost effective modules, which is supporting up to 1.25Gbps, and transmission distance up to 20km on SM fiber. The transceiver consists of two sections: The transmitter section incorporates a laser driver and a 1310nm FP laser. The receiver section consists of a PIN photodiode integrated with a transimpedance preamplifier (TIA) and a Limitting Amplifier. 

TBC-5324-1L2 is a high performance, cost effective modules, which is supporting up to 1.25Gbps, and transmission distance up to 20km on SM fiber. The transceiver consists of two sections: The transmitter section incorporates a laser driver and a 1550nm DFB laser. The receiver section consists of a PIN photodiode integrated with a transimpedance preamplifier (TIA) and a Limitting Amplifier.

The module is hot pluggable into the 20-pin connector. The high-speed electrical interface is base on low voltage logic, with nominal 100Ohms differential impedance and AC coupled in the module.These two models need to be used in pairs of 1310nm and 1550nm.

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  • The optical output can be disabled by LVTTL logic high-level input of TX_DIS. Transmit Fault (Tx_Fault) is provided to indicate that the module transmitter has detected a fault condition related to laser operation or safety. Loss of signal (RX_LOS) output is provided to indicate the loss of an input optical signal of receiver. A serial EEPROM in the transceiver allows the user to access transceiver monitoring and configuration data via the 2-wire SFP Management Interface. This interface uses a single address, A0h, with a memory map divided into a lower and upper area. Basic digital diagnostic (DD) data is held in the lower area while specific data is held in a series of tables in the high memory area.

    Features

    l Up to 20 km transmission on SMF

    l Up to1.25 Gbps

    l 1310nm FP laser and 1550nm PIN receiver

    l Single LC/SC receptacle optical interface compliant

    l 2-wire interface for integrated Digital Diagnostic monitoring

    l Hot pluggable

    l Very low EMI and excellent ESD protection

    l +3.3V power supply

    l Power consumption less than 1.0W

    l Operating case temperature: 0~+70°C

  • Specification

    Absolute Maximum Ratings

    Parameter

    Symbol

    Min.

    Max.

    Unit

    Notes

    Storage Temperature

    TS

    -40

    +85

    ℃


    Supply Voltage

    VCC3

    0

    3.6

    V


    Relative Humidity

    RH

    5

    +85

    %

    Note1

    Rx Input Average Power

    Pmax

    -

    +1

    dBm


    Notes:[1] Non-condensing state.

     

    Recommended Operating Conditions

     

    Parameter

    Symbol

    Min.

    Typical

     

    Max.

    Unit

    Operating Case Temperature

    TC

    0

    25

    +70

    ℃

    Power Supply Voltage

    VCC3

    3.13

    3.3

    3.47

    V

    Total Supply Current

    ICC3

    -

    -

    300

    mA

    Power Dissipation

    PD

    -

    -

    1.0

    W

    Data Rate



    1.25


    Gbps

     

     

    Transmitter Operating Characteristic-Optical, Electrical

    Parameter

    Symbol

    Min.

    Typical

    Max.

    Unit

    Note

    Centre Wavelength

    λC

    1260

    1310

    1355

    nm


    Spectral Width

    Δλ



    4

    nm

    FP (RMS)

    Average Optical Power

    Pavg

    -9

    -

    -3

    dBm


    Laser Off Power

    Poff

    -

    -

    -40

    dBm


    Extinction Ratio

    ER

    8.2

    -

    -

    dB


    Operating Data Rate


    -

    1.25

    -

    Gbps


    Optical Eye Mask

    Compliant with 802.3ah eye masks when filtered


    Tx Input Diff. Voltage

    VI

    500

    -

    2400

    mV


    Tx Fault Output Voltage -- Low

    VoL

    -0.3

    -

    0.4

    V


    Tx Fault Output Voltage -- High

    VoH

    2.4

    -

    Vcc+0.3

    V


     

    Receiver Operating Characteristic-Optical, Electrical

    Parameter

    Symbol

    Min.

    Typ.

    Max.

    Unit

    Note

    Center Wavelength

    λr

    1500

    1550

    1580

    nm


    Receive Sensitivity In Average Power

    Psen

    -

    -

    -22

    dBm


    Los Assert

    LosA

    -35

    -

    -

    dBm


    Los Dessert

    LosD

    -

    -

    -23

    dBm


    Los Hysteresis

    LosH

    0.5

    -

    -6

    dB


    Overload

    Pin

    -

    -

    -3

    dBm


    Rx Output Diff Voltage

    Vo

    370

    -

    2000

    mV


    Operating Data Rate

    -

    -

    1.25

    -

    Gbps


     

    Digital Diagnostic Functions

    Parameter

    Symbol

    Min.

    Max.

    Unit

    Note

    Temperature monitor absolute error

    DMI_Temp

    -3

    3

    ℃

    Over operating temp

    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

    -3%

    +-3%

    V


    Bias current monitor absolute error

    DMI_Ibias

    -10%

    10%

    mA


     

    Control and Status I/O Timing Characteristics

    Parameter

    Symbol

    Min.

    Max.

    Unit

    Note

    TX Disable Assert Time

    t_off

    -

    100

    µs

    Note1

    TX Disable Negate Time

    t_on

    -

    2

    ms

    Note2

    Time to initialize including reset of TX_Fault

    t_init

    -

    300

    ms

    Note3

    TX Fault Assert Time

    t_fault_on

    -

    1

    ms

    Note4

    TX Fault Reset Time

    t_reset

    10

    -

    µs

    Note5

    LOS Assert Time

    t_loss_on

    -

    100

    µs

    Note6

    LOS Deassert Time

    t_loss_off

    -

    100

    µs

    Note7

     Notes:[1] Time from rising edge of TX Disable to when the optical output falls below 10% of nominal[2] Time from falling edge of TX Disable to when the modulated optical output rises above 90% of nominal[3] From power on or negation of TX Fault using TX Disable[4] Time from fault to TX fault on[5] Time from TX fault to TX nominal[6] Time from LOS state to RX LOS assert[7] Time from non-LOS state to RX LOS deassert.

     Pin-out Definition
    图片3.png
                                                    Figure1


    Pin Assignment

    Pin

    Logic

    Symbol

    Name/Description

    Note

    1


    VeeT

    Module Transmitter Ground


    2

    LVTTL-O

    TX_Fault

    Module Transmitter Fault


    3

    LVTTL-I

    TX_Disable

    Transmitter Disable; Turns off transmitter laser output


    4

    LVTTL-I/O

    SDA

    2-wire Serial Interface Data Line (Same as MOD-DEF2 as defined in the INF-8074i)


    5

    LVTTL-I/O

    SCL

    2-wire Serial Interface Clock (Same as MOD-DEF1 as defined in the INF-8074i)


    6


    MOD_ABS

    Module Absent, connected to VeeT or VeeR in the module


    7

    LVTTL-I

    RS0

    Not used


    8

    LVTTL-O

    RX_LOS

    Receiver Loss of Signal Indication (In FC designated as RX_LOS, in SONET designated as LOS, and in Ethernet designated at Signal Detect)


    9

    LVTTL-I

    RS1

    Not used


    10


    VeeR

    Module Receiver Ground


    11


    VeeR

    Module Receiver Ground


    12

    CML-O

    RD-

    Receiver Inverted Data Output


    13

    CML-O

    RD+

    Receiver Non-Inverted Data Output


    14


    VeeR

    Module Receiver Ground


    15


    VccR

    Module Receiver 3.3 V Supply


    16


    VccT

    Module Transmitter 3.3 V Supply


    17


    VeeT

    Module Transmitter Ground


    18

    CML-I

    TD+

    Transmitter Non-Inverted Data Input


    19

    CML-I

    TD-

    Transmitter Inverted Data Input


       20


    VeeT

    Module Transmitter Ground


     

     Block Diagram of Transceiver
    图片4.png

                                                                                             Figure2

    Transmitter SectionThe transmitter converts 1.25Gbit/s serial PECL or CML electrical data into serial optical data compliant with the 1000BASE-LX standard. An open collector compatible Transmit Disable (Tx_Dis) is provided.  A logic “1,” or no connection on this pin will disable the laser from transmitting.  A logic “0” on this pin provides normal operation.  The transmitter has an internal automatic power control loop (APC) to ensure constant optical power output across supply voltage and temperature variations.  An open collector compatible Transmit Fault (Tx_Fault) is provided. TX_Fault is a module output contact that when high, indicates that the module transmitter has detected a fault condition related to laser operation or safety.  The TX_Fault output contact is an open drain/collector and shall be pulled up to the Vcc_Host in the host with a resistor in the range 4.7-10 kΩ. TX_Disable is a module input contact. When TX_Disable is asserted high or left open, the SFP module transmitter output shall be turned off. This contact shall be pulled up to VccT with a 4.7 kΩ to 10 kΩ resistor

     

    Receiver SectionThe receiver converts 1.25Gbit/s serial optical data into serial PECL/CML electrical data.  An open collector compatible Loss of Signal is provided.  Rx_LOS when high indicates an optical signal level below that specified in the relevant standard.  The Rx_LOS contact is an open drain/collector output and shall be pulled up to Vcc_Host in the host with a resistor in the range 4.7-10 kΩ, or with an active termination.  Power supply filtering is recommended for both the transmitter and receiver.   The Rx_LOS signal is intended as a preliminary indication to the system in which the SFP is installed that the received signal strength is below the specified range. Such an indication typically points to non-installed cables, broken cables, or a disabled, failing or a powered off transmitter at the far end of the cable.


    Recommended Interface Circuit
    图片5.png
                                                           Figure3

     

     

  • Dimensions

    LC interface

     图片1.png

    SC interface
    图片2.png

  • Model
    		Specifications
    TBC-3524-1L03Gigabit single-mode single-fiber bidirectional 3km transmission wavelength Tx:1310/Rx:1550nm, optical interface LC;
    TBC-5324-1L03Gigabit single-mode single-fiber bidirectional 3km transmission wavelength Tx:1550/Rx:1310nm, optical interface LC;
    TBC-3524-1L2Gigabit single-mode single-fiber bidirectional 20km transmission wavelength Tx:1310/Rx:1550nm, optical interface LC;
    TBC-5324-1L2Gigabit single-mode single-fiber bidirectional 20km transmission wavelength Tx:1550/Rx:1310nm, optical interface LC;
    TBC-3524-1L4Gigabit single-mode single-fiber bidirectional 40km transmission wavelength Tx:1310/Rx:1550nm, optical interface LC;
    TBC-5324-1L4Gigabit single-mode single-fiber bidirectional 40km transmission wavelength Tx:1550/Rx:1310nm, optical interface LC;
    TBC-3524-1L6Gigabit single-mode single-fiber bidirectional 60km transmission wavelength Tx:1310/Rx:1550nm, optical interface LC;
    TBC-5324-1L6Gigabit single-mode single-fiber bidirectional 60km transmission wavelength Tx:1550/Rx:1310nm, optical interface LC;
    TBC-4524-1L8Gigabit single-mode single-fiber bidirectional 80km transmission wavelength Tx:1490/Rx:1550nm, optical interface LC;
    TBC-5424-1L8Gigabit single-mode single-fiber bidirectional 80km transmission wavelength Tx:1550/Rx:1490nm, optical interface LC;
    TBC-4524-1L10Gigabit single-mode single-fiber bidirectional 100km transmission wavelength Tx:1490/Rx:1550nm, optical interface LC;
    TBC-5424-1L10Gigabit single-mode single-fiber bidirectional 100km transmission wavelength Tx:1550/Rx:1490nm, optical interface LC;
    TBC-4524-1L12Gigabit single-mode single-fiber bidirectional 120km transmission wavelength Tx:1490/Rx:1550nm, optical interface LC;
    TBC-5424-1L12Gigabit single-mode single-fiber bidirectional 120km transmission wavelength Tx:1550/Rx:1490nm, optical interface LC;


  • Applications

    l Data Center Interconnects

    l Enterprise Networks

    l Telecommunications

    l Campus Networks

    l Custom high-speed data pipes


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