GAOTek GEPON ONU Transceiver GEPONU-101, 1.25Gb, 2×10 SFF and SC/UPC

This 1.25Gbps, 1490nm GEPON ONU transceiver is used with a Single-Mode Fiber to reach 12 Miles (20km).


Key Features

  • 3ah Gigabit Ethernet compliant
  • Bi-directional 1.25Gbps Upstream/1.25Gbps Downstream
  • 4 Miles (20km) transmission distance
  • 2×10 pin SFF package with SC/UPC pigtail
  • 1310nm Burst Mode 1.25Gbps transmitter
  • 1490nm Continuous Mode 1.25Gbps Receiver
  • LVTTL Bias Control input and Rx Signal Detect output
  • Laser Class 1 Product which complies with the requirements of IEC 60825-1 and IEC 60825-2
  • Single +3.3V power supply



Technical Specifications

Protocol 2-wire serial communication
Working Range Up to 12.4miles (20km)
Standards IEEE802.3ah Gigabit Ethernet

Laser Class 1 Product with the Requirements of IEC 60825-1 and IEC 60825-2

IEC/EN 61000-4-2

IEC/EN 60950

ROHS 2002/95/EC

Data rate 1.25 Gb/s
Wavelength 1490nm
Connector Type SC/UPC Connector
Transmitter Extinction Ratio 9dB
Transmitter OFF Output  Power -45dBM
Transmitter  Differential  Line Input Impedance 80-120 Ω
Receiver Sensitivity -27 dBm
Receiver Input Saturation Power -3 dBm
Dimensions  1.94in x 0.52in x0.38in( 49.5×13.4×9.8 mm)
Supply Voltage -0.3 to 4V
Storage Temperature -40 °F to 185 °F (-40°C to 85°C)
Storage Ambient Humidity 5% to 95%
Case Operating Temperature 32°F to 158°F (0°C to 70°C)



PIN Descriptions:

Electrical Interface Characteristics

Note(1): Internally AC coupled, but requires a 100Ohm differential  termination at or internal to Serializer/ Deserializer.

Ordering Information

GAO Product ID Data Rate (Mbps) Wavelength(nm)

Tx (Rx)

Temperature Range(°F (Tcase) BEN(Enable Signal)
GAO-GEPONU-101-A 1250 1310(1490) -40°F to 158°F    (0°C to 70°C) High
GAO-GEPONU-101-B 1250 1310(1490) -40°F to 158°F    (0°C to 70°C) Low
GAO-GEPONU-101-C 1250 1310(1490) -40°F to 185°F    (-40°C to 85°C) High
GAO-GEPONU-101-D 1250 1310(1490) -40°F to 185°F    (-40°C to 85°C) Low

Transmitter Burst Mode Timing Characteristic(BEN=Low level)

Digital Diagnostic Monitor Interface (DDMI) Description

The DDMI can detect TX power, RX power, Bias current, Temperature and VCC.

  Monitor Scope Monitor Error
TX power -3dBm ~8 dBm ±3dBm
RX power -3dBm~27dBm ±3dBm
Bias 0mA~90mA ±10%
Temperature -40°F to 185°F ±41°F
Vcc 2.8V~3.8V ±5%

Recommended Interface Circuit

Regulatory Compliance

Outline Dimensions

Parameter Unit Description Note
Mechanical Dimensions Inches(mm) 1.94 x0.52 x0.38                           ( 49.5×13.4×9.8)
Connector Type SC/UPC Connector IEC-61754-4
Minimum Fiber Bending Radius Inches(mm) 0.7 (20)
Maximum Fiber Contact Temperature °F(°C) 185°F (85°C)
Tensile Force on Pigtail Pounds(Kg) 2.2 (1)
Maximum Fiber Stress Allowance Kpsi 200
Fiber length (A) Inches(mm) 23.6±50(600±50)


  • IEEE 802.3ah 1000BASE-PX10/20-U
  • Burst Mode Application
  • FTTx WDM Broadband Access


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