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400G QSFP56-DD 10km

The ACT QSFP56-DD 400Gb/s 4×100G LR1 optical module is designed for 10 km single-mode fiber (SMF) data-center and telecom interconnect applications. The module supports an aggregate data rate of 400 Gb/s by converting eight 53.125 Gb/s PAM4 electrical lanes into four parallel 100 Gb/s optical lanes, each operating in the 1310 nm wavelength range. On the receive side, the module converts four 100 Gb/s optical signals back into eight 53.125 Gb/s PAM4 electrical output lanes, enabling high-capacity bidirectional transmission. The optical interface uses a standard MPO-12 APC connector, with dedicated transmit and receive fiber lanes to support 4×100GBASE-LR1 operation. Accurate optical alignment is ensured by integrated guide pins within the receptacle. The electrical interface is compliant with the QSFP56-DD MSA edge connector, allowing seamless integration with QSFP-DD-based 400G network platforms. The module is fully compliant with the QSFP56-DD Multi-Source Agreement (MSA) Type 2 and supports CMIS 4.0 digital diagnostic monitoring, enabling real-time access to key operating parameters. Designed for reliable operation in data-center and telecom environments, the module meets stringent requirements for performance, signal integrity, and electromagnetic compatibility, ensuring stable operation across the specified commercial temperature range.

·       Breakout Mode
      
Ø4x100GBASE-LR1 compliant
         106.25Gb/s with PAM4
      Ø4x100GAUI-2 compliant
         2x53.125Gb/s with PAM4

·       Or Aggregation Mode
      
Ø400 Gb/s Ethernet Protocol
         4x106.25Gb/s with PAM4
      Ø400GAUI-8 compliant
         8x53.125Gb/s with PAM4

·       QSFP-DD MSA compliant

·       MPO-12 / APC connector with 8° angled end-face

·       Power consumption < 8W

·       Operating case temperature 0 to 70°C

·       CMIS 4.0 management interface     



Absolute Maximum Ratings

Parameter

Symbol

Min.

Max.

Unit

Notes


Supply Voltage

VCC

0

3.6

V


Storage Temperature


-40

85

°C


Optical Receiver Input


-

5.8

dBm

Average, each lane

 Operating Conditions

Parameter

Symbol

Min.

Typ

Max.

Unit

Notes

Supply Voltage

VCC

3.135

3.3

3.465

V


Supply Voltage Noise Tolerance

PSNRmod

-

-

66

mV

10 Hz to 10 MHz

Power Consumption

P_4

-

-

8

W


Instantaneous Peak Current

Icc_ip_4



3200

mA


Sustained Peak Current

Icc-sp_4



2640.3

mA


Supply Current

Icc-4

-

-

2551.8

mA

Steady state

Case Temperature

TC

0

25

70

°C


Optical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Channel Data Rate

fDC

106.25

Gb/s


Signaling Rate

fSG

106.25

Gb/s

PAM4

Signal Speed Variation from Nominal

fSG

-100


+100

ppm


Wavelength (Range)

C

1304.5


1317.5

nm


Side-Mode Suppression Ratio

SMSR

30



dB


Average Launch Power


-1.9


4.8

dBm

Note 1

Outer Optical Modulation Amplitude (OMAouter)


1.1

5.0

dBm

for TDECQ < 1.4 dB


-0.3

+ TDECQ


5.0

dBm

for 1.4 dB ≤ TDECQ

≤ 3.4 dB

Transmitter and Dispersion Eye Closure for PAM4

TDECQ



3.4

dB


Transmitter Eye Closure for PAM4

TECQ



3.4

dB


| TDECQ – TECQ |




2.5

dB


Over/Under-Shoot




22

%


Transmitter Power Excursion




2.8

dBm


Extinction Ratio

ER

3.5



dB


Transmitter Transition Time




17

ps


Average Optical Output Power of Off Transmitter

Poff



-15

dBm


RIN15.6OMA




-136

dB/Hz


Optical Return Loss Tolerance




15.6

dB


Transmitter Reflectance




-26

dB

Note 2

Average Receive Power


-8.2


4.8

dBm

Note 3

Receive Power (OMAouter)




5.0

dBm


Receiver Reflectance




-26

dB


Receiver Sensitivity (OMAouter)


Max -6.1


for TECQ<1.4

dB,Note 4



Max (-7.5 + TECQ)


for 1.4 dB ≤ TECQ ≤3.4 dB, Note 4

Stressed Receiver Sensitivity (OMAouter)




-4.1

dBm

Note 4, 5

Conditions of Stressed Receiver Sensitivity Test (Note 6)

Stressed Eye Closure for PAM4 (SECQ), Lane under Test

SECQ

3.4

dB


 

Notes:
                
1. Average launch power, each lane (min) is informative and not the principal indicator of signal strength. A transmitter with launch power below this value cannot be compliant; however, a value                          above this does not ensure compliance.

      2. Transmitter reflectance is defined looking into the transmitter.

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

       received power below this value cannot be compliant; however, a value above this does not ensure compliance.

      4. For when Pre-FEC BER is 2.4 x 10-4.

   5. Measured with conformance test signal at TP3 (see IEEE Std 802.3-2022 clause 140.7.10) for the BER specified in IEEE Std 802.3-2022 clause 140.1.1.

   6. These test conditions are for measuring stressed receiver sensitivity. They are not characteristics of the receiver. 
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RX_LOS Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Receiver Loss of Signal Indicator Assert Level

RX_LOS

-15

-

-9.6

dBm

Average power

Receiver Loss of Signal Indicator De-assert Level

RX_LOS

-

-

-9.1

dBm

Average power

Hysteresis

RX_LOS

0.5

-

-

dB



Electrical Characteristics

Parameter

Min.

Typ.

Max.

Unit

Notes

Module Output (each Lane, at TP4) [Note 1]

Signaling Rate per Lane (Range)

-100ppm

53.125

+100ppm

Gb/s


AC Common-Mode Output Voltage(RMS)

-

-

17.5

mV


Differential Peak-to-Peak Output Voltage

-

-

900

mV


Near-End ESMW (Eye Symmetry Mask Width)

0.265

-

-

UI


Near-End Eye Height, Differential

70

-

-

mV


Far-End ESMW (Eye Symmetry Mask Width)

0.2

-

-

UI


Far-End Eye Height, Differential

30

-

-

mV


Far-End Pre-Cursor ISI Ratio

-4.5

-

2.5

%


Differential Output Return Loss

Equation (83E-2)

-

-

dB

Note 2

Common to Differential Mode Conversion Return Loss

Equation (83E-3)

-

-

dB

Note 2

Differential Termination Mismatch

-

-

10

%


Transition Time (Min, 20% to 80%)

9.5

-

-

ps


DC Common Mode Voltage

-350

-

2850

mV


Module Input (each Lane)

Signaling Rate per Lane (Range)

-100ppm

53.125

+100ppm

Gb/s


Differential Pk-Pk Input Voltage Tolerance

900

-

-

mV

at TP1a

Differential Input Return Loss

Equation (83E-5)

-

-

dB

at TP1, Note 2

Differential to Common Mode Input Return Loss

Equation (83E-6)

-

-

dB

at TP1, Note 2

Differential Termination Mismatch

-

-

10

%

at TP1

ESMW (Eye Symmetry Mask Width)

0.22

-

-

UI

at TP1a

Eye Width

0.22

-

-

UI

at TP1a

Applied Pk-Pk Sinusoidal Jitter

Table 120E–6

MHz, UI

at TP1a

Eye Height

32

-

-

mV

at TP1a

Single-ended input voltage tolerance range

-0.4

-

3.3

V

at TP1a

DC common mode voltage

-350

-

2850

mV

at TP1

 

Notes:

   1. Electrical module output is squelched for loss of optical input signal.

   2. IEEE Std 802.3-2022 Section 6.


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Pull tab color: Blue
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