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40G QSFP+ PSM4 2 km

Ascent’s QSFP-AQ-MP-31-02 optical transceiver is intended for up to 2km reach service with four-lane 10.3125G data rate. It is based on 3.3V DC power supply and operates in the commercial temperature range. It is compliant with QSFP MSA, SFF-8436 and IEEE802.3ba-2018. Digital diagnostic functions are available via I2C interface, and the control functions can be achieved by LVTTL interfaces on the host, mainly including Module Select (ModSelL), Module Reset (ResetL), Low Power Mode (LPMode). The transceiver incorporates a four-laser array which is usually DFB, four-PIN diode array, an integrated four drivers and TIAs IC separately. The differential AC coupled Tx and Rx data interfaces are CML compatible.

·         MPO-12 optical interface

·         Maximum link length up to 2km

·         Up to 10.3125Gb/s data links per lane

·         +3.3 V power supply

·         QSFP MSA compliant package

·         Hot Pluggable

·         High performance singal mode DML transmitter

·         High sensitivity PIN/TIA optical receiver

·         Single Mode operation

·         BER < 1E-12@-13.6dBm (OMA)

·         Case Operating temperature : 0 to 70 °C

·         Data and Control Interfaces

·         Tx Data CML/AC Coupled

·         Rx Data CML/AC Coupled

·         ModSelL LVTTL

·         ResetL LVTTL

·         ModPrsL LVTTL

·         LPMode LVTTL

·         2-wire I2C communication bus

·         RoHS 6 compliance


Absolute Maximum Ratings

Parameter

Symbol

Min.

Max.

Units

Notes

Storage Temperature

Tstg

-40

+95

°C


Case Operating Temperature

TO

0

+70

°C


Relative Humidity - Storage

RHS

0

95

%


Relative Humidity - Operating

RHO

0

85

%


Supply Voltage

VCC

-0.3

3.6

V



Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Case Operating Temperature

Tcase

0

-

+70

°C


DC Supply Voltage

VCC

3.135

-

3.465

V


Module Supply Current

Iin

-

-

1060

mA



Optical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Transmitter

Signaling Speed per Lane



10.3125±100ppm


Gbps


Lane Wavelength

L0

1295

1310

1325

nm


L1

1295

1310

1325

nm


L2

1295

1310

1325

nm


L3

1295

1310

1325

nm


Side Mode Suppression Ratio

SMSR

30



dB


Average Launch Power|Each Lane

Pavg

-7


2.5

dBm


Optical Modulation Amplitude|Each Lane

OMA



2.5

dBm

1

Transmitter and Dispersion

Penalty|Each Lane

TDP



2.6

dB


Eye Mask coordinates:

X1, X2, X3, Y1, Y2, Y3


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

dBm


Average Launch Power of OFF

Transmitter|Each Lane




-30

dBm


Extinction Ratio

ER

3.5



dB


Spectral Width|20dB




1

nm


Transmitter Reflectance




-12

dB


Optical Return Loss Tolerance




20

dB


Receiver

Signal Speed Per Lane



10.3125±100ppm


Gbps


Lane Wavelength

L0

1295

1310

1325

nm


Center Wavelength Lane 1

L1

1295

1310

1325

nm


Center Wavelength Lane 2

L2

1295

1310

1325

nm


Center Wavelength Lane 3

L3

1295

1310

1325

nm


Damage Threshold|Each Lane

THd

2.5



dBm

2

Average Receive Power|Each Lane


-11.6


2

dBm


Receiver Reflectance




-26

dB


Sensitivity OMA|Each Lane [1]

Sen1



-11

dBm

3








Parameter

Symbol

Min.

Typ.

Max.

Unit

Notes

Stressed Receiver Sensitivity

(OMA), each Lane




-8.6

dBm


LOS Assert

LOSA

-30

-


dBm


LOS Deassert

LOSD



-17

dBm


LOS Hysteresis

LOSH

0.5


5

dB


Vertical Eye Closure Penalty

VECP

1.9



dB

4

Stressed Eye J2 Jitter

J2

0.3



UI


Stressed Eye J4 Jitter

J4

0.47



UI


 

Notes:

1.       Even if the TDP < 0.8dB, the OMA min must exceed the minimum value specified here.

2.       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.

3.       Measured with conformance test signal at receiver input for BER = 1e-12.

4.       Vertical eye closure penalty and stressed eye jitter are test conditions for measuring stressed receiver sensitivity.

5.       They are not characteristics of the receiver.


Electrical Characteristics 

Parameter

Symbol

Min

Typ

Max

Unit

Notes

Transmitter

Differential Data input Swing

Vin

180

-

900

mV


Tx Differential Input

Impendence

Zin

90

100

110

Ω


Tx Differential Output

Impendence

Zout

45

50

55

Ω


ResetL Disable Voltage

Vr

2.0

-

VCC+0.3

V


ResetL Enable Voltage

VrEN

0

-

0.8

V


ModSelL Disable Voltage

Vm

2.0

-

VCC+0.3

V


ModSelL Enable Voltage

VmEN

0

-

0.8

V


Reciever







Differential Data Output Swing

Vout

180

-

900

mV


Rx Differential Output

Impendence

Zout

90

100

110

Ω


IntL Assert Voltage

VInt

VCC-0.5

-

VCC+0.3

V


IntL De-assert Voltage

VDInt

0

-

+0.4

V



Digital Diagnostic

Parameter

Symbol

Spec

Units

Condition/Notes

Temperature

Te

+/-3

°C


Voltage

VCC

+/-5%

V


IBias

BIAS

+/-10%

mA


Rx power

Rx-pwr

+/-3

dBm


Tx power

Tx-pwr

+/-3

dBm



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