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100G QSFP28 LR4 1310 nm 10 km

Ascent’s 100G QSFP28 LR4 is designed for 10km optical communication applications. This module contains 4-lane optical transmitter, 4-lane optical receiver and module management block including 2 wire serial inter-face. The optical signals are multiplexed to a single-mode fiber through an industry standard LC connector. Ascent’s 100G QSFP28 LR4 Optical Transceiver integrates receiver and transmitter path on one module. In the transmit side, four lanes of serial data streams are recovered, retimed, and passed to four laser drivers. The laser drivers control 4 × Distributed Feedback Laser (DFB) with center wavelengths of 1296 nm, 1300 nm, 1305 nm, and 1309 nm. The optical signals are multiplexed to a single-mode fiber through an industry standard LC connector. In the receive side, the four lanes of optical data streams are optically de-multiplexed by the integrated optical de-multiplexer. Each data stream is recovered by a PIN photo-detector and trans-impedance amplifier, retimed. This module features a hot-pluggable electrical interface, low power consumption and MDIO management interface. This product is designed with form factor, optical/electrical connections, and digital diagnostic interface according to the QSFP28 Multi-Source Agreement (MSA) and compliant to IEEE 802.3bm.

     Support line rates from 103.125 Gbps

     Transmission data rate up to25.78 (NRZ) per channel

     Up to 10km transmission on single mode fiber

     LAN WDM DML laser and PIN ROSA

     High speed I/O electrical interface (CAUI-4)

     I2C interface with integrated Digital Diagnostic monitoring

     QSFP28 MSA package with duplex LC connector

     Single +3.3V power supply dissipation

      Commercial:< 4W

      Industrial:<5W

     Temperature Range:

      Commercial:0°C to +70°C

      Industrial:-40°C to +85°C

     Complies with EU Directive 2015/863/EU


Absolute Maximum Ratings

Parameter

Storage Temperature

Symbol

Ts

Min.

-40

Max.

85

Unit

°C

Maximum Supply Voltage

VCC

-0.5

3.6

V

Operating Relative Humidity

RH


85

%

Recommended Operating Conditions

Parameter

Operating Case Temperature

Symbol

Top

Min.

0

Typ.

 

Max.

+70

Unit

°C

Note

QSFP28-100G-LP10


-40


+85

°C

QS28-100G-LP10A

Power Supply Voltage

VCC

3.13

3.3

3.47

V


Power Supply Current

ICC

-


1.21

A

QSFP28-100G-LP10




1.51

A

QS28-100G-LP10A

Maximum Power

PD



4

W

QSFP28-100G-LP10

Dissipation




5


QS28-100G-LP10A

Aggregate Bit Rate

BRAVE


103.125


Gb/s


Lane Bit Rate

BRLANE


25.78125


Gbps


Transmission Distance

TD



10

km


Coupled Fiber

Single-mode fiber

 





9/125 µm SMF


Optical Characteristics

Parameter

Transmitter

Symbol

Min

Typ

Max

Unit

Note

Signaling Speed per Lane



25.78125


Gbps


Wavelength Assignment

L0

1294.53

1295.56

1296.59

nm


Lane Wavelength

L1

1299.02

1300.05

1301.09

nm



L2

1303.54

1304.58

1305.63

nm



L3

1308.09

1309.14

1310.19

nm


Total Average Launch Power

PT



10.5

dBm

1

Average Launch Power per Lane,

Pavg

-4.3


4.5

dBm

1

OMA, Each Lane

POMA

-1.3


4.5

dB

1

Difference in Launch Power between any Two Lanes(Average and OMA) between any Two

Lanes (OMA)

Ptx, diff



3

dB


Average Output Power (Laser

Turn off)

Poff



-30

dBm


Side Mode Suppression Ratio

SMSR

30



dB


Extinction Ratio

ER

4



dB


RIN20OMA

RIN



-130

dB/Hz


Optical Return Loss Tolerance

TOL



20

dB


Transmitter Reflectance

RT



-12

dB


Optical Eye Mask

{0.25,0.4, 0.45, 0.25, 0.28, 0.4}

%

2

Receiver







Signaling Rate, Each Lane

25.78125

Gbps


Center Wavelength Lane 0

λ0

1294.53

1295.56

1296.59

nm


Center Wavelength Lane 1

λ1

1299.02

1300.05

1301.09

nm


Center Wavelength Lane 2

λ2

1303.54

1304.58

1305.63

nm


Center Wavelength Lane 3

λ3

1308.09

1309.14

1310.19

nm


Damage Threshold , Each Lane

Pdamage

5.5



dBm


Average Receive Power, Each

Lane


-10.6


4.5

dBm


Receiver Sensitivity (OMA) per

Lane

SEN



-8.6

dBm

3

Los Assert

LosA

-30



dBm


Los De-assert

LosDA



-12

dBm


Los Hysteresis

LosH

0.5



dB


Notes:
    
1.      The optical power is launched into SMF.
    2.      Measured with a PRBS 231-1 test pattern @25.78125, Hit ratio≤5E-5.
    3.      Measured with a PRBS 231-1 test pattern @25.78125 Gb/s, BER≤1E-12.


Electrical Characteristics

Parameter

Symbol

Min

Typ

Max

Unit

Note

Transmitter (Module Input)

Data Rate, Each Lane



25.78125


Gbps


Differential Voltage pk-pk

Vpp



900

mV

1

Common Mode Voltage

Vcm

-350


2850

mV


Transition Time

Trise/Tf all

10



ps

2

Receiver (Module Output)







Data Rate, Each Lane



25.78125


Gbps


Common Mode Noise, RMS

Vrms



17.5

mV


Differential Output Voltage Wwing

Vout, pp



900

mV


Eye Width

EW15

0.57



UI


Eye Height

EH15

228



mV


Differential Termination Resistance

Mismatch




10

%

1

Transition Time

Trise/Tf all

12



ps


Notes:
    
1.      At 1 MHz
    2.      20% to 80%




 


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