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800G OSFP SR8 850 nm 100 m

Ascent’s OSFP-800G-SR8D-01 is 800 Gb/s Octal Small Form-factor Pluggable (OSFP) optical module with top open fin designed for 100 m with OM4 fiber optical communication applications. It is an InfiniBand and Ethernet 800Gb/s, 2x400Gb/s Twin-port OSFP, SR8 multimode, parallel, 8-channel transceiver using two, 4-channel MPO-12/APC optical connectors at 400Gb/s each.

•    Compliant with common management interface specifications (CMIS)

•    Adaptive Tx input equalization

•    Programmable Rx output amplitude

•    Programmable Rx output pre-cursor

•    Programmable Rx output post-cursor

•    Supply voltage monitoring (DDM_Voltage)

•    Transceiver case temperature monitoring (DDM_Temperature)

•    Tx transmit optical power monitoring for each lane (DDM_TxPower)

•    Tx bias current monitoring for each lane (DDM_TxBias)

•    Rx receive optical power monitoring for each lane (DDM_RxPower)

•    Warning and alarm indication for each DDM function

•    Tx & Rx LOL and LOS indication

•    Tx fault indication

•    Host and line side loopback capabilities

•    Host and line side PRBS generator and checker capabilities

•    CDB firmware upgrade capability

•    Versatile diagnostics monitoring (VDM) capability (optional, additional power consumption increase)

•    Other functions defined in CMIS


Absolute Maximum Ratings

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.

Units

Note

Storage Temperature

TS

‑40

85

°C


Operating Case Temperature

TOP

0

70

°C


Power Supply Voltage

VCC

‑0.5

3.6

V


Relative Humidity

RH

0

85

%

Non‑condensing

 

Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Units

Note

Operating Case Temperature

TOP

0


70

°C


Power Supply Voltage

VCC

3.135

3.3

3.465

V


Data Rate, each Lane



53.125


GBd

PAM4

Data Rate Accuracy


‑100


100

ppm


Pre‑FEC Bit Error Ratio




2.4x10‑4



Post‑FEC Bit Error Ratio




1x10‑15


1

Link Distance (OM4)

D1

2


100

m

2

Link Distance (OM3)

D2

2


50

m

2

Notes:

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

Test Point

Min.

Typ.

Max.

Units

Note

Power Consumption




14

W


Supply Current

Icc



4.24

A


Module Input (each Lane)

Signaling Rate, each Lane

TP1

5325 ppm ± 100 ppm

GBd


DC Common‑Mode Input Voltage

TP1

‑0.35


2.85

V


Single‑Ended Input Voltage

TP1a

‑0.4


3.3

V


AC Common‑Mode Voltage Tolerance

  Low‑Frequency, VCMLF

  Full‑Band, VCMLF

TP1a

 

32

80



mV


Module Stressed Input Tolerance

TP1a

IEEE 802.3ck D3.3 120G.3.4.3



Differential Peak‑to‑Peak Input Voltage Tolerance

TP1a

750



mV


Differential to Common‑Mode Return Loss, RLcd

TP1

IEEE 802.3ck D3.3 Equation 120G‑2

dB


Effective Return Loss, ERL

TP1

8.5



dB


Differential Termination Mismatch

TP1



10

%


Signaling Rate, Each Lane

TP4

53.125 ± 100 ppm

GBd


Peak‑to‑Peak AC Common‑Mode Voltage

  Low‑Frequency, VCMLF

  Full‑Band, VCMLF

TP4



 

32

80

mV


Differential Peak‑To‑Peak Output Voltage

  Short Mode

  Long Mode

TP4



 

600

845

mV


Eye Height

TP4

15



mV


Vertical Eye Closure, VEC

TP4



12

dB


Common‑Mode to Differential Return Loss, Rldc

TP4

IEEE 802.3ck Equation 120G‑1

dB


Effective Return Loss, ERL

TP4

8.5



dB


Differential Termination

Mismatch

TP4



10

%


Transition Time

TP4

8.5



ps


DC Common‑Mode Voltage Tolerance

TP4

‑0.35


2.85

V


 

Optical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Units

Note

Transmitter

Data Rate, each Lane


53.125 ± 100 ppm

GBd


Modulation Format


PAM4



Center Wavelength

λc

844

850

863

nm


RMA Spectral Width




0.6

nm


Average Launch Power, each Lane

PAVG

‑4.6


4

dBm

1

Outer Optical Modulation Amplitude (OMAouter), each Lane

  For max(TECQ, TDECQ) ≤ 1.8 dB

  For 1.8 < max(TECQ, TDECQ) ≤ 4.4 dB

POMA

 

 

‑2.6

‑4.4+ max (TECQ, TDECQ)


3.5

dBm


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

TDECQ



4.4

dB


Transmitter Eye Closure for PAM4, each Lane

TECQ



4.4

dB


Overshoot/Undershoot




29

%


Transmitter Power Excursion




2.3

dBm


Extinction Ratio

ER

2.5



dB


Transmitter Transition Time




17

ps


Average Launch Power of OFF Transmitter

Toff



 

‑30

dBm


RIN14OMA

RIN



‑132

dB/Hz


Optical Return Loss Tolerance

TOL



14

dB


Encircled Flux


≥ 86% at 19 µm

≤ 30% at 4.5 µm

dB

2

Receiver

Data Rate, each Lane


53.125 ± 100 ppm

GBd


Modulation Format


PAM4



Center Wavelength

λc

842

850

948

nm


Damage Threshold, each Lane

THd

5



dBm

3

Average Receive Power, each Lane


‑6.4


4

dBm

4

Receive Power (OMAouter), each Lane




3.5

dBm


Receiver Sensitivity (OMAouter), each Lane

SEN



max(‑4.6, TECQ ‑ 6.4)

dBm

5

Stressed Receiver Sensitivity (OMAouter), each Lane

SRS



‑2.0

dBm

6

Receiver Reflectance

RR



‑15

dB


LOS Assert

LOSA

‑15


‑8.6

dBm


LOS De‑assert

LOSD



‑6.6

dBm


LOS Hysteresis

LOSH

0.5



dB


Conditions of Stress Receiver Sensitivity Test (Note 7)

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



4.4


dB


OMAouter of each Aggressor Lane



3.5


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. If measured into type A1a.2 or type A1a.3, or A1a.4, 50 μm fiber, in accordance with IEC 61280‑1‑4.

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. Measured with conformance test signal at TP3 for the BER equal to 2.4x10‑4.

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

 

Digital Diagnostic Specifications

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

 

Notes:

1. Due to measurement accuracy of different single mode fibers, there could be an additional ±1 dB fluctuation, or a ±3 dB total accuracy.


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