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100G QSFP28 LX4 2km

The 100GBASE-LX4 module is a versatile and high-performance optical transceiver designed to support link lengths of up to 2 km over single-mode fiber (SMF) and up to 100 meters on OM3 multimode fiber (MMF) using a Duplex LC connector. It is designed for a wide range of applications, including data centers and enterprise networking environments where reliable high-speed data transmission is essential. Its ability to operate across both SMF and MMF provides flexibility for network architects, enabling seamless integration into existing infrastructure while meeting the demands of 100G Ethernet applications. This transceiver is a fully integrated 4 x 25.78 Gbps optical module, utilizing advanced optical components to ensure exceptional performance. It incorporates cooled distributed feedback laser diodes (DFB LDs) operating at wavelengths of 1270 nm, 1290 nm, 1310 nm, and 1330 nm. These are paired with high-performance driver integrated circuits (ICs), PIN photodiodes, and clock and data recovery (CDR) ICs that support 25 Gbps electrical interfaces. This combination ensures precise and efficient optical signal transmission, making it well-suited for high-density network environments and demanding data rates. Additionally, the 100GBASE-LX4 module features built-in digital diagnostics monitoring (DDM), which provides access to real-time operating parameters such as temperature, laser bias current, and transmitted/received optical power. This monitoring capability enhances network reliability by enabling proactive maintenance and reducing downtime.

·       QSFP28 MSA compliant

·       Supports 103.1 Gb/s aggregate bit rate

·       4x25Gb/s electrical interface

·       Up to 2km on SMF and 100m on MMF(OM3)

·       Hot-pluggable QSFP28 footprint

·       LC duplex connector

·       Maximum power consumption 3.5 Watts

·       Single 3.3V power supply

·       Support Digital Diagnostic Monitor interface

·       Case operating temperature: 0°C to +70°C

·       RoHS compliant



Absolute Maximum Rating
It has to be noted that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module.

Parameter

Symbol

Min.

Max.

Unit

Note

Maximum Supply Voltage

Vcc

0

3.6

V


Storage Temperature

Ts

-40

85

°C


Operating Case Temperature

Tcase

-5

75

°C


Relative Humidity

RH

5

85

%


Damage Threshold,per Lane

Pdam

3.6


dBm


Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Operating Case Temperature

Tcase

0


70

°C


Supply Voltage

Vcc

3.135

3.3

3.465

V


Relative Humidity

RH

5


85

%


Power Consumption

PD



3.5

W


Data Rate (Optical)

DRO


4*25.78125


Gbps


Data Rate (Electrical)

DRE


4*25.78125


Gbps


Operating Link Distance

LD


SMF:2

MMF:0.1@OM3


km


Optical Characteristics
100GBASE-LX4 OperationEOL, TOP = 0 to 70 °C,Vcc = 3.135 to 3.465 V


Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Transmitter

Signaling Speed per Lane

BR

25.78125 ± 100 ppm

Gbps


Lane Wavelength

λ0

1264.5

1271

1277.5

nm


λ1

1284.5

1291

1297.5

nm


λ2

1304.5

1311

1317.5

nm


λ3

1324.5

1331

1337.5

nm


Side-Mode Suppression Ratio

SMSR

30



dB


Total Average Launch Power for SMF

Ptotal



8.5

dBm


Total Average Launch Power for MMF

-2.5


9.5

dBm


Average Launch Power per Lane for SMF

Pout

-6.5


2.5

dBm


Average Launch Power per Lane

for MMF


-5.0


3.5

dBm


Transmit OMA per Lane for SMF

TxOMA

-4.0


2.5

dBm


Transmit OMA per Lane for MMF


-4.0


3.5

dBm


Launch Power OFF per Lane

POff



-30

dBm


Transmitter and Dispersion Penalty (TDP), each Lane

TDP



3

dB


Extinction Ratio (ER)

ER

3.5



dB


RIN20 OMA

RIN



-128

dB/Hz


Transmitter Eye Mask Definition {X1,X2, X3,Y1, Y2, Y3}

{0.31, 0.40, 0.45, 0.34, 0.38, 0.4}

1

Mask margin


15



%

1

Receiver

Signaling Rate, Each Lane

BR

10.3125 ± 100 ppm

Gb/s


Receive Wavelength

λ0

1264.5

1271

1277.5

nm



λ1

1284.5

1291

1297.5

nm



λ2

1304.5

1311

1317.5

nm



λ3

1324.5

1331

1337.5

nm


Damage Threshold, each Lane

Pmax



3.5

dBm


Average Receive Power per Lane for SMF


-11.5


2.5

dBm


Average Receive Power per Lane for MMF


-8.6


3.5

dBm


Rx Sensitivity (OMA) per Lane

for SMF

RSEN



-8.6

dBm


Rx Sensitivity (OMA) per Lane

for MMF




-8.6

dBm


Receiver Reflectance

Rfl



-26

dB


LOS Assert

LOSA

-30



dBm


LOS De-Assert

LOSD



-12.5

dBm


LOS Hysteresis


0.5


6

dB



Note:
Hit ratio 5 x 10−5.


Electrical Interface Characteristics
100GBASE-LX4 Operation (EOL, TOP = 0 to 70 °C ,Vcc = 3.135 to 3.465 V

Parameter

Symbol

Min

Typ

Max

Unit

Note

Power Consumption




3.5

W


Supply Current

Icc



1

A


Transmitter







Data Rate, each Lane



25.78125


Gbps


Differential Voltage Pk-Pk

Vpp

300


850

mV


Input Differential Impedance

Rin


100


Ohm

1

Differential Termination Resistance Mismatch




10

%


Receiver

Data Rate, each Lane



25.78125


Gbps


Output Differential Impedance

Rout


100


Ohm

1

Differential Termination Resistance Mismatch




10

%


Differential Output Voltage

Vout, pp

260


850

mV

2

 

Notes:

1.       Connected directly to TX data input pins. AC coupled there after.

2.       Into 100Ω differential termination.    

Digital Diagnostic Monitoring Functions
QSFP28-100G-LX02 support the I2C-based Diagnostic Monitoring Interface (DMI) defined in document SFF-8636. The host can access real-time performance of transmitter and receiver optical power, temperature, supply voltage and bias current.

Parameter

Accuracy

Unit

Case Temperature

±3

°C

Supply Voltage

±3%

V

Tx Bias Current

±10%

mA

Tx Optical Power

±3

dB

Rx Optical Power

±3

dB


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