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40G QSFP+ LR4 10 km

Ascent QSFP+ LR4 is designed to operate over single-mode fiber system using 4X10 CWDM channel in 1310 band and links up to 10km. The module converts 4 inputs channel of 10Gb/s electrical data to 4 CWDM optical signals, and multiplexes them into a single channel for 40Gb/s optical transmission. Reversely, on the receiver side, the module optically de-multiplexes a 40Gb/s input into 4 CWDM channels signals, and converts them to 4 channel output electrical data.

•    4 CWDM lanes Mux/Demux design

•    Up to 11.1Gbps Data rate per wavelength

•    Up to 10km transmission on SMF

•    Electrically hot-pluggable

•    Digital Diagnostics Monitoring Interface

•    Compliant with QSFP+ MSA with LC connector

•    Case operating temperature range:0°C to 70°C 

•    Power dissipation < 3.5 W


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


Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Case Operating Temperature

Tcase

0

-

70

°C

Without air flow

Power Supply Voltage

VCC

3.13

3.3

3.47

V


Power Supply Current

ICC

-


900

mA


Data Rate

BR


10.3125


Gbps

Each channel

Transmission Distance

TD


-

10

km


Coupled fiber

Single mode fiber

9/125um SMF

Optical Characteristics 

Parameter

Symbol

Min

Typ

Max

Unit

Note

Transmitter







Wavelength Assignment

λ0

1264.5

1271

1277.5

nm


λ1

1284.5

1291

1297.5

nm


λ2

1304.5

1311

1317.5

nm


λ3

1324.5

1331

1337.5

nm


Total Output. Power

POUT



8.3

dBm


Average Launch Power Per lane


-7


2.3

dBm


Spectral Width (-20dB)

σ



1

nm


SMSR


30



dB


Optical Extinction Ratio

ER

3.5



dB


Average launch Power off per lane

Poff



-30

dBm


Transmitter and Dispersion Penalty

TDP



2.3

dB


RIN

RIN



-128

dB/Hz


Output Eye Mask

Compliant with IEEE 802.3ba


Receiver







Rx Sensitivity per laneOMA

RSENS



-11.5

dBm

1

Input Saturation Power (Overload)

Psat

2.3



dBm


Receiver Reflectance 

Rr



-26

dB


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

3.13

3.3

3.47

V


Supply Current

Icc



900

mA


Transmitter







Input differential impedance

Rin


100


Ω

1

 Differential data input swing

Vin,pp

180


1000

mV


Transmit Disable Voltage

VD

Vcc–1.3


Vcc

V


Transmit Enable Voltage

VEN

Vee


Vee+ 0.8

V

2

Transmit Disable Assert Time




10

us


Receiver







Differential data output swing

Vout,pp

300


850

mV

3

Data output rise time

tr

28



ps

4

Data output fall time

tf

28



ps

4

LOS Fault

VLOS fault

Vcc–1.3


VccHOST

V

5

LOS Normal

VLOS norm

Vee


Vee+0.8

V

5

Power Supply Rejection

PSR

100



mVpp

6

Notes:  

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

2. Or open circuit.   

3. Into 100 ohms differential termination.   

4. 20 – 80 %.

5. Loss of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.   

6. Receiver sensitivity is compliant with power supply sinusoidal modulation of 20 Hz to 1.5 MHz up to specified value applied through the recommended power supply filtering network. 


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