Alpha Bridge SFP AB-XPON-ST-1

Features

  • Single fiber bi-directional data links GPON ONU and EPON ONU application with XPON MAC.
  • SC/UPC receptacle SFP with PON ONU MAC inside, “Plug-and-play” via auto-discovery and configuration.
  • 1310nm DFB burst mode transmitter, 1490nm TIA continuous mode.
  • Single 3V power supply.
  • Digital diagnostic monitor interface compatible with SFF-8472.
  • SFP MSA compliance.
  • Low EMI and excellent ESD protection.
  • Class I laser safety standard IEC-60825 compliant.
  • RoHS compliance.
  • XPON stick compatible with GPON and EPON.
  • Complies with SFP Multi-Source Agreement (MSA) SFF-8074i.
  • Complies with ITUT-T 984.2, G.984.2 Amendment 1.
  • Complies with ITUT 988 ONU management and control interface (OMCI) specification.
  • Complies with 3AH.
  • Complies with SGMII and 1000BASE-X.

Applications

  • Passive Optical Networks (PON).
  • The product is an MSA-compliant SFP that incorporates not just the optics for an ONU, but all of the electronics need as well. It is a “PON on a Stick” that an entire FTTH ONU in a slightly oversized SFP. It can be plugged into networking equipment. Allowing the data interfaces on a switch, router, etc. to be customized for different fiber environments and distance requirements.

 

Absolute Maximum Ratings XPON-ST-1

Parameter Symbol Min. Max. Unit Notes
Storage Ambient Temperature TSTG -40 85 °C  
Operating Case Temperature Tc 0 70 °C  
  Tc -40 85 °C  
Operating Humidity OH 5 95 %  
Power Supply Voltage VCC -0.5 3.6 V  

Recommended Operating Conditions XPON-ST-1

Parameter Symbol Min. Typ. Max. Unit Notes
Power Supply Voltage VCC 3.13 3.3 3.47 V  
Power Dissipation     PD     -     2.10     2.5     W Max value under High temp environment
Operating Case Temperature Tc 0   +70 °C  
  Tc -40   +85 °C  
Operating Humidity Range OH 5   95 %  
Data Rate     TX:1.244 / RX:2.488   Gbit/s GPON MODE
      TX:1.25 / RX:1.25     EPON MODE
Data Rate Drift   -100   +100 PPM  

Transmitter Optical characterstics Conditions XPON-ST-1

Parameter Symbol Min. Typ. Max. Unit Note
Optical Center Wavelength λC 1290 1310 1330 nm  
Spectral Width (-20dB) ∆λ     1 nm  
Side Mode Suppression Ratio SMSR 30     dB  
Average Launch Optical Power AOP 0.5   4 dBm Launched into SMF Fiber
Burst off Average Output Power       -45 dBm  
Extinction Ratio ER 10     dB  
Rise/Fall Time (20%-80%) TR/TF     0.26 ns Unfiltered PRBS 223 - 1@1244.16 Mbps
RIN15OMA       -115 dB/Hz  
Optical Return Loss Tolerance   -15     dB  
Transmitter Reflectance       -10 dB  
Transmitter and Dispersion Penalty TDP     1 dB Transmit on 20km SMF.
Optical Waveform Diagram Compliant With ITU-T G984.2 PRBS 223 –1, @1244.16Mbps

Transmitter Electrical characterstics Conditions XPON-ST-1

Parameter Symbol Min. Typ. Max. Unit Notes
Data Input Differential Swing   300   1800 mV CML input, AC coupled
Input Differential Impedance   90 100 110 Ω  
Transmitter TxDisable Control Voltage -   0   0.8 V  
Transmitter TxDisable Voltage - High   2.0   VCC V  
Transmitter Fault Alarm Voltage - Low   0   0.4 V  
Transmitter Fault Alarm Voltage – High   2.4   Vcc V  

Receiver Optical characterstics Conditions XPON-ST-1

Parameter Symbol Min. Typ. Max. Unit Notes
Operating Wavelength λc 1480 1490 1500 nm  
Sensitivity SEN     -28 dBm PRBS 223 - 1 @1G~2.5Gbps
Saturation Optical Power SAT -8     dBm  
Loss of Signal De-Assert LOSD     -29 dBm  
Loss of Signal Assert LOSA -40     dBm  
Signal-Detected Hysteresis   0.5   6 dBm  
Receiver Reflectance       -12 dB λ=1490nm
WDM Filter Isolation   38     dB λ=1550nm
  35     dB λ=1650nm

Receiver Electrical Characterstics Conditions XPON-ST-1

Parameter Symbol Min.    Typ.     Max.    Unit Notes
Data Output Differential Swing   300   1200 mV CML output, AC coupled
Loss of Signal - Low   0   0.4 V  
Loss of Signal - High   2.4   VCC V  

Pin Descriptons XPON-ST-1

PIN Name Description Notes
1 VeeT Transmitter Ground Note 5
2 TX Fault Transmitter Fault Indication Note 1
3 TX Disable                           NC  
4 MOD-DEF2 Module Definition 2 Note 3,2 wire serial ID Interface
5 MOD-DEF1 Module Definition 1 Note 3,2 wire serial ID Interface
6 MOD-DEF0 Module Definition 0 Note 3 Grounded in Module
7 Rate NC -
8 LOS Loss of Signal Note 4
9 VeeR Receiver Ground Note 5
10 VeeR Receiver Ground Note 5
11 VeeR Receiver Ground Note 5
12 RD- Inv. Received DataOut Note 6
13 RD+ Received Data Out Note 6
14 VeeR Receiver Ground Note 5
15 VccR Receiver Power 3.3 ±5%, Note 7
16 VccT Transmitter Power 3.3 ±5%, Note
17 VeeT Transmitter Ground Note 5
18 TD+ Transmit Data In Note 8
19 TD- Inv.Transmit Data In Note 8
20 VeeT Transmitter Ground Note 5
  • TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor on the host board. Pull up voltage between 0V and VccT, R+0.3V. When high, output indicates a laser fault of some kind. Low indicates normal operation.In the low state, the output will be pulled to < 0.8V.
  • TX disable: This pin is no function for SFP STICK
  • Mod-Def 0,1,2. These are the module definition They should be pulled up with a 4.7K – 10KΩ resistor on the host board. The pull-up voltage shall be VccT or VccR. Mod-Def 0 is grounded by the module to indicate that the module is present Mod-Def 1 is the clock line of two wire serial interface for serial ID Mod-Def 2 is the data line of two wire serial interface for serial ID
  • LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor. Pull up voltage between 2.0V and VccT, R+0.3V. When high, this output indicates the received optical power is below the worst-case receiver sensitivity (as defined by the standard in use). Low indicates normal In the low state, the output will be pulled to < 0.8V.
  • VeeR and VeeT may be internally connected within the SFP.
  • RD-/+: These are the differential receiver They are AC coupled 100 Ω differential lines which should be terminated with 100 Ω (differential) at the user SERDES. The AC coupling is done inside the module and is thus not required on the host board. The voltage swing on these lines will be between 370 and 2000 mV differential (185 – 1000 mV single ended) when properly terminated.
  • VccR and VccT are the receiver and transmitter power They are defined as 3.3V ±5% at the SFP connector pin.
  • Maximum supply current is 300 mA.
  • Recommended host board power supply filtering is shown below. Inductors with DC resistance of less than 1Ω=should be used in order to maintain the required voltage at the SFP input pin with 3.3V supply voltage. When the recommended supply filtering network is used, hot plugging of the SFP transceiver module will result in an inrush current of no more than 30 mA greater than the steady state value. VccR and VccT may be internally connected within the SFP transceiver module.
  • TD-/+: These are the differential transmitter They are AC-coupled, differential lines with 100Ω differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board. The inputs will accept differential swings of 500 – 2400 mV (250 – 1200 mV single-ended), though it is recommended that values between 500 and 1200 mV differential (250 – 600 mV single-ended) be used for best EMI performance.

Recommended Host Board Supply Filtering Network

                                                                                                   DESCRIPTION OF EEPROM ADDRESS A0H AND A2H

SFP ONU uses the two-wire serial bus to access two blocks of 256-byte EEPROM address 1010000X (A0h) and 1010001X (A2h), A0h stores static information including product and vendor IDs and A2h provides diagnostic information about the module’s present operating conditions. The transceiver generates this diagnostic data by digitization of internal analog signals. Calibration and alarm/warning threshold data is written during device manufacture. The below figure shows the detail descriptions of A0h and A2h. All this information is not only accessible by a local host equipment into which the EPON Stick is plugged, but also can be retrieved by OLT remotely through EPON OAM messages.

  • The check code shall be the low order 8 bits of the sum of the contents of all the bytes from.
  • The check code shall be the low order 8 bits of the sum of the contents of all the bytes from byte 64 to byte 94.
  • The value is reference date, it will be assigned accord to the module’s actual situation A2H.

Digital Diagnostics Monitoring Interface

  Parameter   Range   Accuracy   Calibration
  Temperature   -40 to 85°C ( I Temp)   ±3°C   Internal
  0 to 70°C(C Temp) ±3°C Internal
Voltage 0 to 3.7V ±3% Internal
Bias Current 0 to 130mA ±10% Internal
TX Power -10 to 8 dBm ±2dB Internal
RX Power monitor -30 to -8 dBm ±2dB Internal

Ordering Information

   Model Number Part Number Reach Input/Output
AB-XPON-ST-1 OPAX-MX1-85-CT 100m AC/AC
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