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4 CWDM Lanes SFP Optical Transceiver Module , Small Form Factor Pluggable Transceiver

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4 CWDM Lanes SFP Optical Transceiver Module , Small Form Factor Pluggable Transceiver

4 CWDM Lanes SFP Optical Transceiver Module , Small Form Factor Pluggable Transceiver
4 CWDM Lanes SFP Optical Transceiver Module , Small Form Factor Pluggable Transceiver

Large Image :  4 CWDM Lanes SFP Optical Transceiver Module , Small Form Factor Pluggable Transceiver

Product Details:
Place of Origin: Shenzhen, China
Brand Name: E-link China
Certification: CE, RoHS, FCC
Model Number: LNK-QSFP-ER
Payment & Shipping Terms:
Minimum Order Quantity: 1 piece
Price: Negotiation
Packaging Details: 10 piece in 1 carton box
Delivery Time: 3-5 working days
Payment Terms: T/T, Western Union, MoneyGram, Paypal
Supply Ability: 1000000000pcs/Month
Detailed Product Description
Type: 4 CWDM Lanes Ethernet: 40G
Fiber: Single Mode 40km Compliant: QSFP+ MSA
Operating Case Temperature: 0~70C Warranty: 2 Years
High Light:

cisco compatible sfp modules


fiber optic transceiver module

40GBASE-ER4 4 CWDM lanes 1550nm SM SFP Optical Transceiver Module



Features Applications  
4 CWDM lanes MUX/DEMUX design y 40G Ethernet  
Up to 11.2Gbps data rate per wavelength  
y Infiniband interconnects  
QSFP+ MSA compliant  
y 40G Telecom connections  

Up to 40km transmission


Operating case temperature: 0~70C


Maximum 3.5W operation power


RoHS compliant




1. General Description


This product is a transceiver module designed for 2m-40km optical communication applications. The design is compliant to 40GBASE-ER4 of the IEEE P802.3ba standard. The 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.


The central wavelengths of the 4 CWDM channels are 1511, 1531, 1551 and 1571 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 148-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 product 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.


2. Functional Description


This product converts the 4-channel 10Gb/s electrical input data into CWDM optical signals (light), by a driven 4-wavelength Distributed Feedback Laser (DFB) array. The light is combined by the MUX parts as a 40Gb/s data, propagating out of the transmitter module from the SMF. The receiver module accepts the 40Gb/s CWDM optical signals input, and de-multiplexes it into 4 individual 10Gb/s channels with different wavelength. Each wavelength light is collected by a discrete photo diode, and then outputted as electric data after amplified by a TIA. Figure 1 shows the functional block diagram of this product.


A single +3.3V power supply is required to power up this product. Both power supply pins VccTx and VccRx are internally connected and should be applied concurrently. As per MSA specifications the module offers 7 low speed hardware control pins (including the 2-wire serial interface): ModSelL, SCL, SDA, ResetL, LPMode, ModPrsL and IntL.


Module Select (ModSelL) is an input pin. When held low by the host, this product responds to 2-wire serial communication commands. The ModSelL allows the use of this product on a single 2-wire interface bus – individual ModSelL lines must be used.


Serial Clock (SCL) and Serial Data (SDA) are required for the 2-wire serial bus communication interface and enable the host to access the QSFP memory map.The ResetL






pin enables a complete reset, returning the settings to their default state, when a low level on the ResetL pin is held for longer than the minimum pulse length. During the execution of a reset the host shall disregard all status bits until it indicates a completion of the reset interrupt. The product indicates this by posting an IntL (Interrupt) signal with the Data_Not_Ready bit negated in the memory map. Note that on power up (including hot insertion) the module should post this completion of reset interrupt without requiring a reset.


Low Power Mode (LPMode) pin is used to set the maximum power consumption for the product in order to protect hosts that are not capable of cooling higher power modules, should such modules be accidentally inserted.


Module Present (ModPrsL) is a signal local to the host board which, in the absence of a product, is normally pulled up to the host Vcc. When the product is inserted into the connector, it completes the path to ground though a resistor on the host board and asserts the signal. ModPrsL then indicates its present by setting ModPrsL to a “Low” state.


Interrupt (IntL) is an output pin. “Low” indicates a possible operational fault or a status critical to the host system. The host identifies the source of the interrupt using the 2-wire serial interface. The IntL pin is an open collector output and must be pulled to the Host Vcc voltage on the Host board.



3. Transceiver Block Diagram



TX3 DFB Driver 4-wavelength Optical
TX2 Array (4ch) DFB laser MUX
TX1   Array (4ch)




5. Pin Definitions


PIN Logic Symbol Name/Description Note
1   GND Ground 1
2 CML-I Tx2n Transmitter Inverted Data Input  
3 CML-I Tx2p Transmitter Non-Inverted Data output  
4   GND Ground 1
5 CML-I Tx4n Transmitter Inverted Data Input  
6 CML-I Tx4p Transmitter Non-Inverted Data output  
7   GND Ground 1
8 LVTLL-I ModSelL Module Select  
9 LVTLL-I ResetL Module Reset  
10   VccRx ﹢3.3V Power Supply Receiver 2
11 LVCMOS-I/O SCL 2-Wire Serial Interface Clock  
12 LVCMOS-I/O SDA 2-Wire Serial Interface Data  
13   GND Ground  






  14 CML-O Rx3p Receiver Non-Inverted Data Output    
  15 CML-O Rx3n Receiver Inverted Data Output    
    GND Ground 1  
  17 CML-O Rx1p Receiver Non-Inverted Data Output    
  18 CML-O Rx1n Receiver Inverted Data Output    
  19   GND Ground 1  
  20   GND Ground 1  
  21 CML-O Rx2n Receiver Inverted Data Output    
  22 CML-O Rx2p Receiver Non-Inverted Data Output    
  23   GND Ground 1  
  24 CML-O Rx4n Receiver Inverted Data Output 1  
  25 CML-O Rx4p Receiver Non-Inverted Data Output    
  26   GND Ground 1  
  27 LVTTL-O ModPrsL Module Present    
  28 LVTTL-O IntL Interrupt    
  29   VccTx +3.3 V Power Supply transmitter 2  
  30   Vcc1 +3.3 V Power Supply 2  
  31 LVTTL-I LPMode Low Power Mode    
  32   GND Ground 1  
  33 CML-I Tx3p Transmitter Non-Inverted Data Input    
  34 CML-I Tx3n Transmitter Inverted Data Output    
  35   GND Ground 1  
  36 CML-I Tx1p Transmitter Non-Inverted Data Input    
  37 CML-I Tx1n Transmitter Inverted Data Output    
  38   GND Ground 1  




1. GND is the symbol for signal and supply (power) common for QSFP modules. All are common within the QSFP module and all module voltages are referenced to this potential unless otherwise noted. Connect these directly to the host board signal common ground plane.







2. VccRx, Vcc1 and VccTx are the receiving and transmission power suppliers and shall be applied concurrently. Recommended host board power supply filtering is shown below. Vcc Rx, Vcc1 and Vcc Tx may be internally connected within the QSFP transceiver module in any combination. The connector pins are each rated for a maximum current of 500mA.



6. 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 Unit Note  
  Storage Temperature     Tst -20 85 degC    
  Relative Humidity (non-condensation)   RH 0 85 %    
  Operating Case Temperature     Topc 0 70 degC    
  Operating Range       0.002 10 km    
  Supply Voltage     VCC -0.5 3.6 V    
7. Optical Characteristics                
  Parameter   Symbol   Min. Typical Max Unit Notes  
      L0   1484.5 1491 1497.5 nm    
Wavelength Assignment   L1   1504.5 1511 1517.5 nm    
  L2   1524.5 1531 1537.5 nm    
      L3   1544.5 1551 1557.5 nm    
Side-mode Suppression Ratio   SMSR   30 - - dB    
Total Average Launch Power   PT   - - 8.3 dBm    
Average Launch Power, each       -7 - 2.3 dBm    
Optical Modulation Amplitude,   OMA   -4 - +3.5 dBm    
each Lane        
Difference in Launch Power       - - 6.5 dB    
between any two Lanes          




  Launch Power in OMA minus                              
  Transmitter and Dispersion         -4.8   -         dBm  
  Penalty (TDP), each Lane                              
  TDP, each Lane   TDP               2.3     dB  
  Extinction Ratio   ER     3.5   -   -     dB  
  Relative Intensity Noise   Rin     -     -   -128   dB/Hz 12dB
  Optical Return Loss Tolerance         -     -   20     dB  
  Transmitter Reflectance   RT               -12     dB  
  Transmitter Eye Mask                              
  Definition {X1, X2, X3, Y1, Y2,       {0.25,0.4,0.45,0.25,0.28,0.4}        
  Average Launch Power OFF   Poff             -30     dBm  
  Transmitter, each Lane                    
  Damage Threshold   THd 3.3               dBm   1
  Average Power at Receiver     -13.7       2.3   dBm    
  Input, each Lane                
  Receiver Reflectance   RR -   -   -26   dB    
  Receiver Power (OMA), each     -   -   3.5   dBm    
  Stressed Receiver Sensitivity     -   -   -9.9   dBm    
  in OMA, each Lane              
  Receiver Sensitivity, each   SR -   -   -11.5   dBm    
  Difference in Receive Power                              
  between any two Lanes                 7.5   dB    



Contact Details
E-link China Technology Co., Ltd.

Contact Person: Mr. Michael Guo

Tel: 19928768315

Fax: 86-755-8312-8674

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