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400G QSFP-DD LR4 CWDM 10 km

Ascent’s QSFP-DD-LR4-10 is a 400Gb/s Quad Small Form Factor Pluggable-double density (QSFP-DD) optical module designed for 10 km optical communication applications. The module converts 8 channels of 50Gb/s (PAM4) electrical input data to 4 channels of CWDM optical signals, and multiplexes them into a single channel for 400 Gb/s optical transmission. Reversely, on the receiver side, the module optically de-multiplexes a 400 Gb/s optical input into 4 channels of CWDM optical signals, and converts them to 8 channels of 50 Gb/s (PAM4) electrical output data.

    Compliant with 100G Lambda MSA: 400GBASE-LR4-10 optical interface

    Compliant with IEEE 802.3bs standard: 400GAUI-8 electrical interface

    Compliant with QSFP-DD MSA HW Rev 5.1 type 2 housing with duplex LC connector

    Compliant with QSFP-DD CMIS Rev 4.0

    Operating distance at engineering link of up to 10 km

    Maximum power consumption 10 W

    Case operating temperature 0 °C to +70 °C

    Two wire serial Interface with digital diagnostic monitoring

    Complies with EU Directive 2011/65/EU (RoHS compliant)

    Class 1 Laser

Absolute Maximum Ratings

Parameter

Symbol

Min.

Max.

Unit

Note

Storage Temperature

TS

‑40

85

°C


Supply Voltage

VCC

‑0.5

3.6

V


Relative Humidity (non‑condensing)

RH

5

95

%

Non‑condensing

Data Input Voltage Differential

lVDIP‑VDINl

1

V


Control Input Voltage

VI

‑0.3

VCC+0.5

V


Control Output Voltage

VO

‑20

20

V


 

Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Operating Case Temperature

TOPR

0

70

°C


Power Supply Voltage

VCC

3.135

3.3

3.465

V


Instantaneous Peak Current at Hot Plug

ICC_IP

4000

mA


Sustained Peak Current at Hot Plug

ICC_SP

3300

mA


Maximum Power Dissipation

PD

10

W


Maximum Power Dissipation, Low Power Mode

PDLP

1.5

W


Signaling Rate per Lane

SRL

53.125

GBd

1

Two Wire Serial Interface Clock Rate

400

kHz


Power Supply Noise Tolerance 

66

mV

2

Rx Differential Data Output Load

100

Ω


Operating Distance

2

10000

m


Notes:

1. PAM4

2. 10 Hz to 10 MHz

 

Electrical Specification High Speed Signal (Compliant with IEEE 802.3bs 400GAUI‑8)

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Receiver (Module Output)

AC Common‑Mode Output Voltage (RMS)


17.5

mV


Differential Output Voltage


900

mV


Near‑End Eye Height, Differential


70

mV


Far‑End Eye Height, Differential


30

mV


Far End Pre‑Cursor Ratio


‑4.5

2.5

%


Differential Termination Mismatch


10

%


Transition Time (Min., 20% To 80%)


9.5

ps


DC Common Mode Voltage


‑350

2850

mV


Transmitter (Module Input)

Differential pk‑pk Input Voltage Tolerance


900

mV


Differential Termination Mismatch


10

%


Single‑Ended Voltage Tolerance Range


‑0.4

3.3

V


DC Common Mode Voltage


‑350

2850

mV


 

Electrical Specification Low Speed Signal (compliant with QSFP‑DD HW Rev 5.0)

Parameter

Symbol

Min.

Max.

Unit

Note

Module Output SCL and SDA

VOL

0

0.4

V


Module Input SCL and SDA

VIL

‑0.3

VCC*0.3

V



VIH

VCC*0.7

VCC+0.5

V


InitMode, ResetL, and ModSelL

VIL

‑0.3

0.8

V



VIH

2

VCC+0.3

V


IntL

VOL

0

0.4

V



VOH

VCC‑0.5

VCC+0.3

V


 

Optical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Transmitter


Wavelength L0

λC0

1264.5

1271

1277.5

nm


Wavelength L1

λC1

1284.5

1291

1297.5

nm


Wavelength L2

λC2

1304.5

1311

1317.5

nm


Wavelength L3

λC3

1324.5

1331

1337.5

nm


Side Mode Suppression Ratio

SMSR

30

dB


Average Launch Power, each Lane

AOPL

‑3.3

3.5

dBm

1

Outer Optical Modulation Amplitude (OMAouter), each Lane

TOMA

‑0.3

3.7

dBm


Outer Optical Modulation Amplitude (OMAouter), each lane:

  for TDECQ<1.4dB

  for 1.4≤TDECQ≤3.4dB

 

 

TOMA

 

 

0.3

‑1.1+ TDECQ


 

 

dBm

dBm


Difference in Launch Power between any Two Lanes (OMAouter)

DP

4

dB


Transmitter and Dispersion Eye Closure for PAM4 (TDECQ), each Lane

TDECQ

3.9

dB


Transmitter Eye Closure for PAM4 (TECQ)

TECQ

3.9



| TDECQ ‑ TECQ |

2.5

dB


Over/Under‑Shoot

25

%


Transmitter Peak‑to‑Peak Power

5.2

dBm


Average Launch Power of OFF Transmitter, each Lane

TOFF

‑16

dBm


Extinction Ratio, each lane

ER

3.5

dB


Transmitter Transition Time

TT

17

ps


RIN15.6OMA

RIN

‑136

dB/Hz


Optical Return Loss Tolerance

ORL

15.6

dB


Transmitter Reflectance

TR

‑26

dB


Receiver


Wavelength L0

λC0

1264.5

1271

1277.5

nm


Wavelength L1

λC1

1284.5

1291

1297.5

nm


Wavelength L2

λC2

1304.5

1311

1317.5

nm


Wavelength L3

λC3

1324.5

1331

1337.5

nm


Damage Threshold, each Lane

AOPD

6.1

dBm


Average Receive Power, each Lane

AOPR

‑9

5.1

dBm

2

Receive Power (OMAouter), each Lane

OMAR

4.4

dBm


Difference in Receive Power between any Two Lanes (Omaouter)

DR

4.3

dB


Receiver Reflectance

RR

‑26

dB


Receiver Sensitivity (OMAouter), each lane:

  for TECQ <1.4dB

  for 1.4≤TECQ≤3.4dB

SOMA

 

‑6.8‑8.2+TECQ

 

dBm

dBm


Stressed Receiver Sensitivity (OMAouter), each lane

SRS

‑4.3

dBm


Conditions of Stressed Receiver Sensitivity Test







Stressed Eye Closure for PAM4 (SECQ)

3.9

dB


OMAouter of each Aggressor Lane

‑0.4

dBm










Notes:

1. Average launch power, each lane (min) is informative and not the principal indicator of signal strength.

2. Average receive power, each lane (min) is informative and not the principal indicator of signal strength.

 

 

Digital Diagnostics

Parameter

Range

Accuracy

Unit

Calibration

Temperature

0 to 70

±3

°C

Internal

Voltage

0 to VCC

0.1

V

Internal

Tx Bias Current (each Lane)

0 to 100

10%

mA

Internal

Tx Output Power (each Lane)

‑2.7 to +5.1

±3

dB

Internal

Rx Receive Power (each Lane)

‑9 to +5.1

±3

dB

Internal


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