The QSFP+-40G-ER4 is a transceiver module designed for 40Km optical communication applications. The design is compliant to 40GBASE-ER4 of the IEEE P802.3ba standard. The huihongfiber module converts 4 inputs channels (ch) 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.

40G QSFP ER4 Fiber Optic Transceiver Features:

4 CWDM lanes MUX/DEMUX design
Up to 11.2Gbps per channel bandwidth
Aggregate bandwidth of > 40Gbps
Duplex LC connector
Compliant with 40G Ethernet IEEE802.3ba and 40GBASE-ER4 Standard
QSFP MSA compliant
Up to 40km transmission
Compliant with QDR/DDR Infiniband data rates
Single +3.3V power supply operating
Built-in digital diagnostic functions
Temperature range 0°C to 70°C
RoHS Compliant

40G QSFP ER4 Fiber Optic Transceiver Applications:

Rack to rack
Data centers Switches and Routers
Metro networks
Switches and Routers
40G BASE-ER4 Ethernet Links

The central wavelengths of the QSFP+-40G-ER4 4 CWDM channels are 1271, 1291, 1311 and 1331 nm as members of the CWDM wavelength grid defined in ITU-T G694.2. It contains a duplex LC connector for the optical interface and a 38-pin connector for the electrical interface. To minimize the optical dispersion in the long-haul system, single-mode fiber (SMF) has to be applied in this module.

The QSFP+-40G-ER4 is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference.

The QSFP+-40G-ER4 module operates from a single +3.3V power supply and LVCMOS/LVTTL global control signals such as Module Present, Reset, Interrupt and Low Power Mode are available with the modules. A 2-wire serial interface is available to send and receive more complex control signals and to obtain digital diagnostic information. Individual channels can be addressed and unused channels can be shut down for maximum design flexibility.

The QSFP+-40G-ER4 is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP Multi-Source Agreement (MSA). It has been designed by huihongfiber to meet the harshest external operating conditions including temperature, humidity and EMI interference. The module offers very high functionality and feature integration, accessible via a two-wire serial interface.

  • Absolute Maximum Ratings
Parameter Symbol Min. Typical Max. Unit
Storage Temperature TS -40 +85 °C
Supply Voltage VCCT, R -0.5 4 V
Relative Humidity RH 0 85 %
  • Recommended Operating Environment:
Parameter Symbol Min. Typical Max. Unit
Case operating Temperature TC 0 +70 °C
Supply Voltage VCCT, R +3.13 3.3 +3.47 V
Supply Current ICC 1100 mA
Power Dissipation PD 3.5 W
  • Electrical Characteristics (TOP = 0 to 70 °C, VCC = 3.13 to 3.47 Volts
Parameter Symbol Min Typ Max Unit Note
Data Rate per Channel 10.3125 11.2 Gbps
Power Consumption 2.5 3.5 W
Supply Current Icc 0.75 1.0 A
Control I/O Voltage-High VIH 2.0 Vcc V
Control I/O Voltage-Low VIL 0 0.7 V
Inter-Channel Skew TSK 150 Ps
RESETL Duration 10 Us
RESETL De-assert time 2000 ms
Power On Time 2000 ms
Transmitter
Single Ended Output Voltage Tolerance 0.3 4 V 1
Common mode Voltage Tolerance 15 mV
Transmit Input Diff Voltage VI 150 1200 mV
Transmit Input Diff Impedance ZIN 85 100 115
Data Dependent Input Jitter DDJ 0.3 UI
Receiver
Single Ended Output Voltage Tolerance 0.3 4 V
Rx Output Diff Voltage Vo 370 600 950 mV
Rx Output Rise and Fall Voltage Tr/Tf 35 ps 1
Total Jitter TJ 0.3 UI

Note:

  1. 20~80%
  • Optical Parameters(TOP = 0 to 70 °C, VCC = 3.13 to 3.47 Volts)
Parameter Symbol Min Typ Max Unit Ref.
Transmitter
 

 

Wavelength Assignment

L0 1264.5 1271 1277.5 nm
L1 1284.5 1291 1297.5 nm
L2 1304.5 1311 1317.5 nm
L3 1324.5 1331 1337.5 nm
Side-mode Suppression Ratio SMSR 30 dB
Total Average Launch Power PT +10.5 dBm
Average Launch Power, each Lane -2.7 +4.5 dBm
Difference in Launch Power between any two Lanes (OMA) 4.7 dB
Optical Modulation Amplitude, each Lane OMA 0.3 +5 dBm
Launch Power in OMA minus Transmitter and Dispersion Penalty (TDP), each Lane -0.5 dBm
TDP, each Lane TDP 2.6 dB
Extinction Ratio ER 3.5 dB
Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3} {0.25, 0.4, 0.45, 0.25, 0.28, 0.4}
Optical Return Loss Tolerance 20 dB
Average Launch Power OFF Transmitter, each Lane Poff -30 dBm
Relative Intensity Noise Rin -128 dB/HZ 1
Receiver
Damage Threshold THd 3.8 dBm 1
Average Power at Receiver Input, each Lane R -21.2 -4.5 dBm
Receiver Power (OMA), each Lane -1 dB
RSSI Accuracy -2 2 dB
Receiver Reflectance Rrx -26 dB
Receiver Power (OMA), each Lane 3.5 dBm
Stressed Receiver Sensitivity in OMA, each Lane -16.8 dBm
Receiver Sensitivity(OMA), each Lane Sen -19 dBm
Difference in Receive Power between any two Lanes (OMA) 7.0 dB
Receive Electrical 3 dB upper Cutoff Frequency, each Lane 12.3 GHz
LOS De-Assert LOSD -20 dBm
LOS Assert LOSA -35 dBm
LOS Hysteresis LOSH 0.5 dB

Note

  1. 12dB Reflection
  • Diagnostic Monitoring Interface

Digital diagnostics monitoring function is available on all QSFP+ ER4. A 2-wire serial interface provides user to contact with module. The structure of the memory is shown in flowing. The memory space is arranged into a lower, single page, address space of 128 bytes and multiple upper address space pages. This structure permits timely access to addresses in the lower page, such as Interrupt Flags and Monitors. Less time critical time entries, such as serial ID information and threshold settings, are available with the Page Select function. The interface address used is A0xh and is mainly used for time critical data like interrupt handling in order to enable a one-time-read for all data related to an interrupt situation. After an interrupt, IntL has been asserted, the host can read out the flag field to determine the affected channel and type of flag.