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400G QSFP112 DR4 1310 nm 500 m

Ascent’s 400 Gbps QSFP112 DR4 transceiver is a 400Gb/s Quad Small Form-factor Pluggable (QSFP) optical module design for 500 m optical communication applications. The module converts 4 input channels of 100Gb/s electrical data to 4 channels of parallel optical signals, each capable of 100Gb/s operation for an aggregate data rate of 400Gb/s. Reversely, on the receiver side, the module converts 4 channels of parallel optical signals of 100Gb/s, each channel for an aggregate data rate of 400Gb/s into 4 channels of 100Gb/s electrical output data. An optical fiber cable with an MTP/MPO-12 connector can be plugged into the QSFP112 DR4 module receptacle. Proper alignment is ensured by the guide pins inside the receptacle. The cable usually cannot be twisted for proper channel to channel alignment. Electrical connection is achieved through a QSFP112 MSA-compliant edge type connector. This product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP112 MSA Type2. It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference. I2C interface is supported to read and control the status of this product.

·       QSFP112 MSA Compliant

·       CMIS compliance

·       Optical Interface: IEEE 802.3cu compliant

·       Electrical Interface: IEEE 802.3ck 400GAUI-4

·       Support 425Gb/s aggregate bit rate

·       4 Parallel optical lanes

·       MPO-12 connector

·       Up to 500m transmission on SMF with KP4 FEC

              ·       Operating case temperature 0 to 70°C


Absolute Maximum Ratings

Parameter

Symbol

Min.

Max.

Unit

Storage Temperature

Ts

-40

85

°C

Case Operating Temperature

Top

0

70

°C

PowerSupply Voltage

Vcc

-0.5

3.6

V

Relative Humidity (non-condensation)

RH

0

85

dBm


Recommended Operating Conditions

Parameter

Operating Case Temperature

Symbol

Top

Min.

0

Max.

70

Unit

°C

Power Supply Voltage

RH

15

85

%

Data Rate, Each Lane

Vcc

3.135

3.465

V

Data Rate Accuracy

Pc

-

8

W

Pre-FEC Bit Error Ratio



2.55

A

Post-FEC Bit Error Ratio

BR


425

Gbps

Link Distance



60

m


Note:
   1.     FEC provided by host system.
   2.       FEC required on host system to support maximum distance.


Electrical Characteristics

The following electrical characteristics are defined over the Recommended Operating Environment
unless otherwise specified.

Parameter

Symbol

Min

Typ.

Max

Units

Notes

Power Consumption




9.5

W


Supply Current

Icc



2.87

A


Module Input (each Lane)

Signaling Rate, Each Lane

TP1

53.125 ± 100 ppm

GBd


DC Common-Mode Input Voltage

TP1

-0.35


2.85



Single-Ended Input Voltage

TP1a

-0.4


3.3



AC Common-Mode Voltage Tolerance

Low-Frequency, VCMLF
Full-Band, VCMLF

TP1a

32

80





Module Stressed Input Test


IEEE 802.3ck 120G3.4.3


Differential Peak-to-Peak Input Voltage Tolerance

TP1a

750





Common to Different Mode Input Return Loss

TP1

IEEE802.3ck Equation 120G-2


Effective Input Return Loss

TP1

8.5





Differential Input Termination Mismatch

TP1



10

%


Module Output (each Lane)

Signaling Rate, Each Lane

TP4

53.125 ± 100 ppm

GBd


Differential Peak-to-Peak







Output Voltage

Short Mode

TP4



600

mV


Long Mode




845



AC Common Mode Output







Voltage, RMS

Low-Frequency, VCMLF

TP4



32

mV


Full-Band, VCMLF




80



Differential Termination

Mismatch

TP4



10

%


Vertical Eye Closure, VEC

TP4



12

dB


Eye Height

TP4

15



mV


Common-Mode to

TP4

IEEE802.3ck Equation 120G-1

dB


Differential Mode Output

Return Loss







Effective Output Return Loss

TP4

8.5



dB


Output Transition Time (20% to 80%)

TP4

8.5



ps


DC Common-Mode Output Voltage

TP4

-350


2850

mV


 
Optical Characteristics

The following electrical characteristics are defined over the Recommended Operating Environment
unless otherwise specified.

Parameter

Symbol

Min

Typ.

Max

Units

Notes

Wavelength

λ

1304.5

1310

1317.5

nm


Transmitter

Data Rate, Each Lane


53.125 ± 100 ppm

GBd


Modulation Format


PAM4



Side-Mode Suppression Ratio

SMSR

30



dB


Average Launch Power, Each Lane

PAVG

-2.9


4

dBm


Outer Optical Modulation

Amplitude (OMAouter), Each Lane

POMA

-0.8


4.2

dBm

 

1

Launch Power in OMAouter Minus TDECQ, Each Lane


-2.2



dBm


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

TDECQ



3.4

dB


Extinction Ratio

ER

3.5



dB


RIN21.4OMA

RIN



-136

dB/Hz


Optical Return Loss Tolerance

TOL



21.4

dB


Transmitter Reflectance

RT



-26

dB


Average Launch Power of OFF Transmitter, each Lane

Poff



-15

dBm


Receiver

Data Rate, Each Lane


53.125 ± 100 ppm

GBd


Modulation Format


PAM4



Damage Threshold, Each Lane

THd

5



dBm

3

Average Receive Power, Each

Lane


-5.9


 

4

dBm

 

4

Receive Power (OMAouter), each Lane




 

4.2

dBm


Receiver Sensitivity

(OMAouter), Each Lane

SEN



Equation (1)

dBm

 

5

Stressed Receiver Sensitivity

(OMAouter), Each Lane

SRS



-1.9

dBm

 

6

Receiver Reflectance

RR



-26

dB


LOS Assert

LOSA

-15


-9.9



LOS De-assert

LOSD



-6.9

dBm


LOS Hysteresis

LOSH

0.5



dB


 

Conditions of Stress Receiver Sensitivity Test (Note 7)

 

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



3.4


dB


OMAouter of Each Aggressor Lane



4.2


dBm


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.       The values for OMAouter (min) vary with TDECQ. Below picture illustrates this along with the values for
             OMAouter(max).
    3.       The receiver shall be able to tolerate, without damage, continuous exposure to a modulated optical
             input signal having this power level on one lane. The receiver does not have to operate correctly at
             this input power.
    4.       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.
    5.       Receiver sensitivity (OMAouter) is informative and is defined for a transmitter with a value of SECQ
             up to 3.4dB. Receiver sensitivity should meet Equation (1), which is illustrated in below picture.
             RS = max(−3.9, SECQ – 5.3) ???????????? where RS is the receiver sensitivity, and TECQ  is the TECQ of the
             transmitter used to measure the receiver sensitivity.
    6.       Measured with conformance test signal at TP3 for the BER equal to 2.4x10-4.
    7.       These test conditions are for measuring stressed receiver sensitivity. They are not characteristics of
             the receiver.

Diagnostic Characteristics

The following digital diagnostic characteristics are defined over the normal operating conditions
unless otherwise specified.

Parameter

Symbol

Min

Max

Units

Notes

Temperature Monitor Absolute Error

DMI_Temp

-3

3

°C

Over operating temperature range

Supply Voltage Monitor absolute error

DMI _VCC

-0.1

0.1

V

Over full operating range

Channel RX Power Monitor Absolute Error

DMI_RX_Ch

-2

2

dB

1

Channel Bias Current

Monitor

DMI_Ibias_Ch

-10%

10%

mA


Channel TX Power Monitor

Absolute Error

DMI_TX_Ch

-2

2

dB

1

Note:
    1.     Due to measurement accuracy of different single mode fibers, there could be an additional ±1 dB

tolerance, or a ±3 dB total tolerance.


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