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40G QSFP+ SR4 150 m

ASCENT’s QSFP+ Series are designed for use in 40 Gigabit per second links over multimode fiber. They are compliant with the QSFP+ MSA and IEEE 802.3ba 40GBASE-SR4.

•    High channel capacity: 40 Gbps per module

•    Up to 11.1 Gbps data rate per channel

•    100 m links on OM3 multi-mode fiber

•    150 m links on OM4 multi-mode fiber

•    High reliability 850 nm VCSEL technology

•    Hot-pluggable

•    Digital diagnostic SFF-8436 compliant

•    Power dissipation < 0.7 W

•    ROHS, FCC complaint




Absolute Maximum Ratings 

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Storage Temperature

Ts

‑40

85

°C


Relative Humidity

RH

5

95

%


Power Supply Voltage

VCC

‑0.3

4

V


Signal Input Voltage


Vcc‑0.3

Vcc+0.3

V


Damage threshold


3.4



dBm


Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Case Operating Temperature

Tcase

0

70

°C

Without air flow

Power Supply Voltage

VCC

3.14

3.3

3.46

V


Power Supply Current

ICC


200

mA


Data Rate

BR


10.3125


Gbps

Each channel

Transmission Distance

TD


100

m

OM3 MMF





150

m

OM4 MMF

Optical Characteristics 

Parameter

Symbol

Min

Typ.

Max

Unit

Note

Transmitter







Center Wavelength

λ0

840


860

nm


Average Launch Power Each Lane


‑7.6


1.0

dBm


Spectral Width (RMS)

σ



0.65

nm


Optical Extinction Ratio

ER

3



dB


Average Launch Power Off Each Lane

Poff



‑30

dBm


Transmitter and Dispersion Penalty Each Lane

TDP



3.5

dB


Optical Return Loss Tolerance 

ORL 



12 

dB


Output Eye Mask

Compliant with IEEE 802.3ba-2010


Receiver







Receiver Wavelength 

λin

840


860

nm


Rx Sensitivity per Lane

RSENS



‑11.1

dBm

1

Input Saturation Power (Overload)

Psat

2.4



dBm


Receiver Reflectance 

Rr



‑12

dB


LOS De‑Assert 

LOSD 



‑12

dBm


LOS Assert 

LOSA 

‑30 



dBm


LOS Hysteresis 


0.5



dBm


Notes: 

1. Measured with a PRBS 231‑1 test pattern, @10.325 Gb/s, BER<10‑12

Electrical Characteristics 

Parameter

Symbol

Min

Typ.

Max

Unit

Note

Supply Voltage

Vcc

3.14

3.3

3.46

V


Supply Current

Icc



200

mA


Transmitter







Input Differential Impedance

Rin


100


Ω

1

Differential Data Input Swing

Vin, pp

180


1000

mV


Single‑Ended Input Voltage Tolerance 

VinT 

‑0.3 


4.0 

V


Receiver







Differential Data Output Swing

Vout, pp

300


850

mV

2

Single‑Ended Output Voltage 


‑0.3 


4.0 

V


Notes: 

1. Connected directly to TX data input pins. AC coupled thereafter. 

2. Into 100 Ω differential termination. 


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