GAOTek XFP CWDM Transceiver with 10 GB/s

This 10 Gigabit 1470 ~ 1610nm XFP CWDM Transceiver is used with single mode optical fiber to reach up to 49.72 miles (80km) transmission distance.





This 10 Gigabit 1470 ~ 1610nm XFP CWDM Transceiver is used with single mode optical fiber to reach up to 49.72 miles (80km) transmission distance. This Coarse Wavelength Division Multiplexing small form-factor pluggable (XFP CWDM) has a Cooled CWDM EML type transceiver and APD type receiver. It supports with FEC and without FEC applications. It complies with 10GBASE-ZR/ZW, 10 gigabit Ethernet, 10G Fiber Channel and RoHS lead free standards.

Key Features:

    • Up to 49.72 miles (80km) transmission distance
    • Cooled CWDM EML and APD Receiver
  • Supports 9.95Gb/s to 11.3Gb/s bit rates
  • Hot-pluggable XFP footprint
  • Supports Line-side and XFI loopback
  • RoHS-6 Compliant (lead-free)
  • Power dissipation <3.0W
  • Full Duplex LC connector
  • No Reference Clock required
  • Built-in digital diagnostic functions
  • Standard bail release mechanism
  • Industrial case operating temperature range from -40 °F to 185 °F (-40°C to +85°C)
  • Commercial case operating temperature range from 32 °F to 158 °F (0°C to 70°C).

Technical Specifications:

Working RangeUp to 49.72 miles (80km)
Standards10GBASE-ZR/ZW As per IEEE 802.3ae requirements.

Class 1 Laser Product.

10 gigabit Ethernet.

10G Fiber Channel

RoHS-6 compliant.

Memory256 byte EEPROM
Data rate10Gb/s
Wavelength1470 ~1610nm
TransmitterCWDM EML
Transmitter output optical Power0 dBm to 4 dBm
Receiver Sensitivity-21 dBm
Receiver Input Saturation Power-8 dBm
Supply Voltage1.8V,3.3V
Maximum Power Consumption<3.0W
Transmitter Input Differential Impedance100Ω
Dimensions3.07in x 0.72in x 0.45in (L 78mm x W18.3mm x   H 11.4mm)
Relative Humidity5% to 95%
Storage Temperature-40 °F to 185 °F (-40°C to 85°C)
Case Operating TemperatureIndustrial-40 °F to 185 °F (-40°C to 85°C)
Commercial32 °F to 158 °F (0°C to 70°C)

Additional Information:


  • 10G Fiber Channel
  • 10GBASE-ZR/ZW & 10G Ethernet
  • SONET OC-192&SDH STM-64

Order Information:

Product IDMediaWavelength


Transmission DistanceTemperature Range


single-mode fiber1470nm ~1610nm49.72miles (80km)Commercial

32 °F to 158 °F (0°C to 70°C)



single-mode fiber1470nm ~1610nm49.72miles (80km)Industrial

-40 °F to 185 °F (-40°C to +85°C)

Wavelength Selection:

WavelengthClasp Color code
1470 nmGray
1490 nmPurple
1510 nmBlue
1530 nmGreen
1550 nmyellow
1570 nmOrange
1590 nmred
1610 nmBrown

Digital Diagnostics Functions:

  • GAOTek GAO- XFPCW -101 series transceiver support the 2-wire serial communication protocol as defined in the XFP MSA.
  • Additionally, GAOTek XFP Transceivers provide a unique enhanced digital diagnostic monitoring interface which allows real-time access to device operating parameters such as transmitter optical power, receiver optical power, transceiver temperature, transceiver supply voltage and laser bias current. It defines an alarm system and warning flags, which alerts the end users when particular operating parameters are outside of a factory set normal range.
  • Standard XFP Serial id provides access to identification information that describes the transceiver’s capabilities, standard interfaces, manufacturer and other information.
  • XFP MSA defines a 256-byte memory map in EEPROM that is accessible over a 2 wire serial interface at the 8 bit address 1010000X (A0h).
  • The operating and diagnostics information is monitored and reported by a Digital Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed through a 2-wire serial interface. The memories are organized as a series of 8-bit data words that can be addressed individually or sequentially

Electrical characteristics:

Module Total Power   3.0W1
Supply Current-1.8V supplyIcc2  250mA
Supply Current-3.3V supplyIcc3  760mA
XFP Interrupt, Mod_NRVol0 0.4V
VohVccHOST -0.5 VccHOST +0.3V
P_Down/RSTVil-0.3 0.8V
Vih2.0 Vcc3+0.3V
Interrupt Assert DelayInterrupt_on  200ms
Interrupt Negate DelayInterrupt_off  500us
Mod_NR Assert / Negate Delay  1ms
P-Down reset time10 us
Input Differential ImpedanceRin801001202
Single ended data input swingVin, pp120820mV
Transmit Disable VoltageVD2.0VccV3
Transmit Enable VoltageVenGNDGND+ 0.8V
Differential Output ImpedanceRout801001204
Differential data output swingVout,pp340850mV
Data output rise timetr38ps5
Data output fall timetf38ps5
LOS FaultVLOS faultVccHOST –0.5VccHOSTV6
LOS NormalVLOS normGNDGND+0.5V6


  1. Maximum total power value is specified across the full temperature and voltage range.
  2. After internal AC coupling.
  3. Open circuit.
  4. Into 100 ohms differential termination.
  5. These are unfiltered 20-80% values 6. Loss of Signal is open collector to be pulled up with a 4.7kΩ – 10kΩ resistor to 3.15 – 3.6V.
  • Logic 0 indicates normal operation.
  • Logic 1 indicates no signal detected.

Optical Characteristics:

Average Optical PowerPOut04dBm
Optical WavelengthλλC-6.5λCλC+6.5nm
Side mode Suppression ratioSMSR30dB
Optical Extinction RatioER8.2dB
Average Launch power of transmitterPOFF-45dBm
Optical Return Loss24dB
Optical Rise/Fall Time (20%-80%)Tr, Tf35ps
Spectrum Bandwidth(-20dB)σ0.3nm
Eye Mask Margin10%
Receiver Sensitivity(back to back)Psen-24dBm
Receiver Sensitivity with 80 km fiberPsen-21dBm
Wavelength Rangeλ c12701610nm
Input Saturation Power (Overload)Psat-8dBm
Receiver ReflectanceRrx-27dB
LOS AssertLOSA-37dBm
LOS De -AssertLOSD-27dBm
LOS Hysteresis0.5dB

PIN Diagram:

PIN Descriptions:

1GNDModule Ground1
2VEE5Optional –5.2 Power Supply – Not required
3LVTTL-IMod-DeselModule De-select; When held low allows the module to respond to 2-wire serial interface commands
4LVTTL-OInterruptInterrupt (bar); Indicates presence of an important condition which can be read over the serial 2-wire interface3
5LVTTL-ITX_DISTransmitter Disable; Transmitter laser source turned off
6VCC5+5 Power Supply
7GNDModule Ground1
8VCC3+3.3V Power Supply
9VCC3+3.3V Power Supply
10LVTTL-ISCLSerial 2-wire interface clock
11LVTTL-I/OSDASerial 2-wire interface data line3
12LVTTL-OMod_AbsModule Absent; Indicates module is not present. Grounded in the module.3
13LVTTL-OMod_NRModule Not Ready; GAOTek defines it as a logical OR between RX_LOS and Loss of Lock in TX/RX.3
14LVTTL-ORX_LOSReceiver Loss of Signal indicator3
15GNDModule Ground1
16GNDModule Ground1
17CML-ORD-Receiver inverted data output
18CML-ORD+Receiver non-inverted data output
19GNDModule Ground1
20VCC2+1.8V Power Supply – Not required
21LVTTL-IP_Down/RSTPower Down; When high, places the module in the low power stand-by mode and on the falling edge of P_Down initiates a module reset


Reset; The falling edge initiates a complete reset of the module including the 2-wire serial interface, equivalent to a power cycle.
22VCC2+1.8V Power Supply – Not required
23GNDModule Ground1
24PECL-IRefCLKReference Clock non-inverted input, AC coupled on the host board –Not required2
25PECL-IRefCLK-Reference Clock inverted input, AC coupled on the host board – Not required2
26GNDModule Ground1
27GNDModule Ground1
28CML-ITD-Transmitter inverted data input
29CML-ITD+Transmitter non-inverted data input
30GNDModule Ground1


  1. Module circuit ground is isolated from module chassis ground within the module.
  2. A Reference Clock input is not required .If present, it will be ignored.
  3. Open collector; should be pulled up with 4.7kΩ – 10kΩ on host board to a voltage between 3.15V and 3.6V.

Optical Path Specifications:

Application with FEC


Chromatic Dispersion Range of the optical path from point S to R for the maximum optical path penalty1470nm  962ps/nm
1490nm  1052 
1510nm  1142 
1530nm  1233 
1550nm  1324 
1570nm  1415 
1590nm  1508 
1610nm  1600 
Application without FEC (ITU-T G.695 S-C8S1-2D2)
Parameter MinTypeMax.Unit
Chromatic Dispersion Range of the optical path from point S to R for the maximum optical path penalty1470nm  842ps/nm
1490nm  921 
1510nm  1000 
1530nm  1079 
1550nm  1159 
1570nm  1238 
1590nm  1319 
1610nm  1400 

Reference Diagram:

PCB Layout and Bezel Recommendations:

XFP Host Board Mechanical Layout (dimensions are in mm)

Recommended Host Board Supply Filtering Network:

Mechanical Specifications:

GAOTek’s XFP transceivers are compliant with the dimensions defined by the XFP Multi-Sourcing Agreement (MSA).

XFP transceiver (dimensions are in mm)

Regulatory Compliance:

Laser Eye SafetyFDA 21CFR 1040.10, 1040.11 IEC/EN 60825-1,2Class 1 laser product
Component RecognitionIEC/EN 60950, ULCompatible with standards
ROHS2002/95/ECCompatible with standards
Electrostatic discharge(ESD)IEC/EN 61000-4-2Compatible with standards
EMCEN61000-3Compatible with standards
Electromagnetic Interference(EMI)FCC Part 15 Class B EN 55022 Class B (CISPR 22A)Compatible with standards