DPD-243LX 1.25Gb/s 1310nm Single-mode SFP Transceiver
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  • DPD-243LX 1.25Gb/s 1310nm Single-mode SFP Transceiver

Applied to rail transit, expressway, power station, pipe gallery project and wireless wiring project

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Key words: switch

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  • GENERAL DESCRIP

    Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). The transceiver consists of five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the 1310nm FP laser and the PIN photo-detector .The module data link up to 10KM in 9/125um single mode fiber.

    The optical output can be disabled by a TTL logic high-level input of Tx Disable, and the system also can disable the module via I2C. Tx Fault is provided to indicate that degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver or the link status with partner. The system can also get the LOS (or Link)/Disable/Fault information via I2C register access. 

     

    Features 

    ● Up to 1.25Gb/s data links,up to 10KM 

    ● on 9/125um single mode fiber

    ● FP laser transmitter and PIN photo-detector

    ● Duplex LC/UPC type pluggable optical interface

    ● Metal enclosure, for lower EMI

    ● RoHS compliant and lead-free                         

    ● Compliant with SFF-8472,Support Digital

    ● Diagnostic Monitoring interface

    ● Single +3.3V power supply

    ● Case operating temperature

      Commercial: 0°C to +70℃

      Extended: -10°C to +80

      Industrial: -40°C to +85

  • Pin

    Symbol

    Name/Description

    NOTE

    1

    VEET

    Transmitter Ground (Common with Receiver Ground)

    1

    2

    TFAULT

    Transmitter Fault.

     

    3

    TDIS

    Transmitter Disable. Laser output disabled on high or open.

    2

    4

    MOD_DEF(2)

    Module Definition 2. Data line for Serial ID.

    3

    5

    MOD_DEF(1)

    Module Definition 1. Clock line for Serial ID.

    3

    6

    MOD_DEF(0)

    Module Definition 0. Grounded within the module.

    3

    7

    Rate Select

    No connection required

    4

    8

    LOS

    Loss of Signal indication. Logic 0 indicates normal operation.

    5

    9

    VEER

    Receiver Ground (Common with Transmitter Ground)

    1

    10

    VEER

    Receiver Ground (Common with Transmitter Ground)

    1

    11

    VEER

    Receiver Ground (Common with Transmitter Ground)

    1

    12

    RD-

    Receiver Inverted DATA out. AC Coupled

     

    13

    RD+

    Receiver Non-inverted DATA out. AC Coupled

     

    14

    VEER

    Receiver Ground (Common with Transmitter Ground)

    1

    15

    VCCR

    Receiver Power Supply

     

    16

    VCCT

    Transmitter Power Supply

     

    17

    VEET

    Transmitter Ground (Common with Receiver Ground)

    1

    18

    TD+

    Transmitter Non-Inverted DATA in. AC Coupled.

     

    19

    TD-

    Transmitter Inverted DATA in. AC Coupled.

     

    20

    VEET

    Transmitter Ground (Common with Receiver 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 - 10kohms 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. This is an optional input used to control the receiver bandwidth for compatibility with multiple data rates (most likely Fiber Channel 1x and 2x Rates).If implemented, the input will be internally pulled down with > 30kΩ resistor. The input states are:

    Low (0 – 0.8V): Reduced Bandwidth

    (>0.8, < 2.0V): Undefined

    High (2.0 – 3.465V): Full Bandwidth

    Open: Reduced Bandwidth

    5.LOS is open collector output should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

     

    4. ABSOLUTE MAXIMUM RATING

    Parameter

    Symbol

    Min.

    Typ.

    Max.

    Unit

    Note

    Storage Temperature

    Ts

    -40

     

    85

    ºC

     

    Relative Humidity

    RH

    5

     

    95

    %

     

    Power Supply Voltage

    VCC

    -0.5

     

    4

    V

     

    Signal Input Voltage

     

    -0.3

     

    Vcc+0.3

    V

     

    Receiver Damage Threshold

     

    +5

       

    dBm

     

     

    5. RECOMMENDED OPERATING ENVIRONMENT

    Parameter

    Symbol

    Min.

    Typ.

    Max.

    Unit

    Note

    Case Operating Temperature

    Tcase

    0

     

    70

    ºC

    commercial

    -10

     

    80

    extended

    -40

     

    85

    industrial

    Power Supply Voltage

    VCC

    3.13

    3.3

    3.47

    V

     

    Power Supply Current

    ICC

       

    280

    mA

     

    Power Supply Noise Rejection

         

    100

    mVp-p

    100Hz to 1MHz

    Data Rate

       

    1250/1250

     

    Mbps

    TX Rate/RX Rate

    Transmission Distance

         

    10

    KM

     

    Coupled Fiber

    Single mode fiber

    9/125um SMF

     

    6. OPTICAL CHARACTERISTICS

     

    Parameter

    Symbol

    Min.

    Typ.

    Max.

    Unit

    Note

    Transmitter

    Average Output Power

    POUT

    -9

     

    -3

    dBm

    Note (1)

    Extinction Ratio

    ER

    9

       

    dB

     

    Center Wavelength

    λC

    1270

    1310

    1360

    nm

    FP Laser

    Spectrum Bandwidth(RMS)

    σ

       

    3.5

    nm

     

    Transmitter OFF Output Power

    POff

       

    -45

    dBm

     

    Differential Line Input Impedance

    RIN

    90

    100

    110

    Ohm

     

    Output Eye Mask

    Compliant with IEEE802.3 z (class 1 laser safety)

       

    Receiver

    Input Optical Wavelength

    λIN

    1270

     

    1610

    nm

    PIN-TIA

    Receiver Sensitivity

    PIN

       

    -20

    dBm

    Note (2)

    Input Saturation Power (Overload)

    PSAT

    -3

       

    dBm

     

    Los Of Signal Assert

    PA

       

    -22

    dBm

     

    Los Of Signal De-assert

    PD

    -35

       

    dBm

    Note (3)

    LOS Hysteresis

    PA-PD

    0.5

    2

    6

    dB

     

     


    Note (1): Measure at 2^7-1 NRZ PRBS pattern.

    Note (2): Measured with Light source 1310nm, ER=9dB; BER =<10^-12 @PRBS=2^7-1 NRZ.

    Note (3): When SD De-Assert, the RX-LOS output is High-level (fixed).

     

    7.  DIGITAL DIAGNOSTIC FUNCTIONS

    The SFP MSA defines a 256-byte memory map in E2PROM that is accessible over a 2-wire serial interface at the 8 bit address 1010000X (A0h). The digital diagnostic monitoring interface makes use of the 8 bit address 1010001X (A2h), so the originally defined serial ID memory map remains unchanged. The interface is identical to, and is thus fully backward compatible with both the GBIC Specification and the SFP Multi Source Agreement.

    The operating and diagnostics information is monitored and reported by a Digital Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed through a 2-wire serial interface. The memories are organized as a series of 8-bit data words that can be addressed individually or sequentially.

    Digital diagnostics for the transceivers are internally calibrated by default. The following digital diagnostic characteristics are defined over the Recommended Operating Environment unless otherwise specified

     

    Parameter

    Symbol

    Min.

    Max

    Unit

    Note

    Temperature monitor absolute error

    DMI_Temp

    -3

    3

    °C

     

    Supply voltage monitor absolute error

    DMI_VCC

    -0.1

    0.1

    V

     

    Bias current monitor

    DMI_Ibias

    -10%

    10%

    mA

     

    Laser power monitor absolute error

    DMI_TX

    -3

    3

    dBm

     

    RX power monitor absolute error

    DMI_RX

    -3

    3

    dBm

     

     

    8. ELECTRICAL CHARACTERISTICS

    Parameter

    Symbol

    Min.

    Typ.

    Max.

    Unit

    Note

    Transmitter

    Total Supply Current

    ICC

       

    A

    mA

    Note (1)

    Transmitter Disable Input-High

    VDISH

    2

     

    Vcc+0.3

    V

     

    Transmitter Disable Input-Low

    VDISL

    0

     

    0.8

    V

     

    Transmitter Fault Input-High

    VTxFH

    2

     

    Vcc+0.3

    V

     

    Transmitter Fault Input-Low

    VTxFL

    0

     

    0.8

    V

     

    Receiver

    Total Supply Current

    ICC

       

    B

    mA

    Note (1)

    LOSS Output Voltage-High

    VLOSH

    2

     

    Vcc+0.3

    V

    LVTTL

    LOSS Output Voltage-Low

    VLOSL

    0

     

    0.8

    V

     

    Note (1): A (TX) + B (RX) = 280mA (Not include termination circuit)

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