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GAO-SFPBD-126
GAO-SFPBD-126

GAOTek SFP BIDI Transceiver with 1.25Gb/s (120km)

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Overview:

This 1.25Gb/s 1490nm and 1550nm Bidirectional Small form-factor pluggable (SFP BIDI) Transceiver is used with Single-mode optical fiber to reach up to 74.56 miles (120km) transmission distance. It also uses two wavelength 1490nm -Transmitter/1550nm-Receiver (1550nm -Tx/1490nm -Rx) simultaneously and is connected via bidirectional LC (Lucent Connector) type pluggable optical interface. It has a DFB (Distributed Feedback) type transmitter, an APD (Avalanche Photo-Diode) type receiver, an LD (Laser Driver), a limiting amplifier and digital diagnostic monitor. This SFP BIDI Transceiver is a Class 1 laser safety product which complies with US FDA regulations, SFP MSA, SFF-8472 and RoHS standards.

Key Features:

  • Up to 74.56 miles (120km) transmission distance.
  • 1490nm DFB laser and APD receiver.
  • 1550nm DFB laser and APD receiver.
  • Up to 1.25Gb/s data links.
  • Support Unique enhanced digital diagnostic monitoring interface.
  • BIDI LC/UPC type pluggable optical interface.
  • Hot-pluggable SFP footprint.
  • Metal enclosure, for lower EMI.
  • Single +3.3V power supply
  • Compliant with SFF-8472
  • Low power dissipation
  • Case operating temperature range: 32°F to 158°F (0°C to +70°C)

Technical Specifications:

Protocol 2-Wire Serial communication Protocol
Working Range Up to 74.56 miles (120km)
Memory 256-byte memory map in EEPROM
Standards SFF-8472 and SFP MSA.

Class 1 laser safety with IEEE802.3 z

RoHS compliant.

Data rate 1.25Gb/s
Wavelength 1490 and 1550nm
Fiber Optic Cable 9/125µm Single-mode
Transmitter DFB
APD APD
Connector LC
Digital Diagnostics Monitoring Enabled
Transmitter output optical Power 0 dBm to 5 dBm
Receiver Sensitivity -31 dBm
Receiver Input Saturation Power -10 dBm
Supply Voltage 3.3V
Transmitter Differential Line Input Impedance 100Ω
Dimensions 2.3in x 0.54in x 0.33in (L 58.4mm x W13.7mm x   H 8.5mm)
Relative Humidity 5% to 95% Non-condensing

5% to 70% (Recommended)

Storage Temperature -40 °F to 185 °F (-40°C to 85°C)
Case Operating Temperature 32°F to 158°F (0°C to +70°C)

Applications:

Ideal to be used on applications such as

  • Router/Server Interface
  • Other Optical Links
  • Gigabit Ethernet
  • Switched Backplane Applications
  • Switch to Switch Interface

Ordering Information:

Product ID Data rate(GB/s) Media Wavelength Transmission Distance Temperature Range Supply Current
GAO-SFPBD-126

 

1.25 Single-mode fiber 1490nm/1550nm 74.56 miles (120km)  

 

 

Commercial

32°F to 158°F

(0°C to +70°C)

 

 

 

 

300 mA

 

GAO-SFPBD-126A

 

1.25 Single-mode fiber 1490nm/1550nm 74.56 miles (120km)

Digital Diagnostics Functions:

  • GAOTek GAO-SFPBD-126 series transceivers support the 2-wire serial communication protocol as defined in the SFP MSA1. It is very closely related to the E2PROM defined in the GBIC standard, with the same electrical specifications.
  • Additionally, GAOTek SFP 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 SFP Serial id provides access to identification information that describes the transceiver’s capabilities, standard interfaces, manufacturer and other information.
  • SFP 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 interface is identical to, and is thus fully backward compatible with both the GBIC Specification and the SFP Multi Source Agreement.
  • 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.
  • Digital diagnostics for the GAO-SFPBD-126 are internally calibrated by default.

Electrical Interface Characteristics:

Parameter Symbol Min Typ. Max Unit Note
Transmitter
Total Supply Current ICC A mA 1
Transmitter Disable Input-High VDISH 2 Vcc+0.3 V
Transmitter Disable Input-Low VDISL 0 0.8 V
Transmitter Fault Input-High VTxFH 2 Vcc+0.3 V
Transmitter Fault Input-Low VTxFL 0 0.8 V  
Receiver
Total Supply Current Icc B mA 1
LOSS Output Voltage-High VLOSH 2 Vcc+0.3 V  

LVTTL

LOSS Output Voltage-Low VLOSL 0 0.8 V

Note:

  1. A (TX) + B (RX) = 300mA (Not include termination circuit)

Optical Characteristics:

Specification of Transmitter:

Parameter Symbol Min Type Max Unit Note
Average Output Power POUT 0 5 dBm
Center Wavelength λC 1470 1490 1510 nm GAOTEK-SFPBD-126

 

1530 1550 1570 nm
Side Mode Suppression Ratio SMSR 30 dB DFB Laser
Spectrum Bandwidth(RMS) σ 1 nm
Optical Extinction Ratio ER 9 dB
Transmitter OFF Output Power POff -45 dBm
Jitter P-P tJ 0.1 UI
Output Eye Mask Compliant with IEEE802.3z(class 1 laser safety)
Differential Line Input Impedance RIN 90 100 110 Ohm

Notes:

  1. Measured at 2^7-1 NRZ PRBS pattern
  2. Transmitter eye mask definition

Specification of Receiver:

Parameter Symbol Min Type Max Unit Note
Receiver Sensitivity PIN -31 dBm 1
Input Optical Wavelength λIN 1530 1550 1570 nm GAOTEK-SFPBD-126

 

1470 1490 1510
Input Saturation Power (Overload) Psat -10 dBm
LOS Assert PA -40 dBm
LOS De -Assert PD -32 dBm 2
LOS Hysteresis PA – PD 0.5 2 6 dB

Notes:

  1. Measured with Light source 1550nm (1490nm), ER=9dB; BER =10 -12 @PRBS=27-1
  2. When LOS de-asserted, the RX data+/- output is signal output.

Pin out of Connector Block on Host Board:

PIN Descriptions:

Pin Symbol Name/Description Note
1 VEET Transmitter Ground (Common with Receiver Ground) 1
2 TFault Transmitter Fault
3 TDis Transmitter Disable. 2
4 MOD_DEF(2) Module Definition 2. Data line for Serial ID. 3
5 MOD_DEF(1) Module Definition 1. Clock line for Serial ID. 3
6 MOD_DEF(0) Module Definition 0. Grounded within the module. 3
7 Rate Select No connection required 4
8 LOS Loss of Signal indication. Logic 0 indicates normal operation 5
9 VEER Receiver Ground (Common with Transmitter Ground) 1
10 VEER Receiver Ground (Common with Transmitter Ground) 1
11 VEER Receiver Ground (Common with Transmitter Ground) 1
12 RD- Receiver Inverted DATA out. AC coupled
13 RD+ Receiver Non-inverted DATA out. AC coupled
14 VEER Receiver Ground (Common with transmitter Ground) 1
15 VCCR Receiver power Supply
16 VCCT Transmitter Power supply
17 VEET Transmitter Ground (Common with receiver Ground) 1
18 TD+ Transmitter Non-Inverted DATA in. AC Coupled.
19 TD- Transmitter Inverted DATA in.AC Coupled.
20 VEET Transmitter Ground (Common with Receiver Ground) 1

Notes:

  1. Circuit ground is internally isolated from ground.
  2. Laser output disabled when it is open or TDis > 2.0V, enabled on TDis < 0.8V.
  3. Should be pulled up with 4.7kΩ to 10kΩ on host board to a voltage between 2.0V and 3.6V.MOD_DEF (0) pulls the line low to indicate the module is plugged in.
  4. This is an optional input used to control the receiver bandwidth for compatibility with multiple data rates (most likely Fiber Channel 1x and 2x Rates).If implemented, the input will be internally pulled down with > 30kΩ resistor. The input states are:
  • Low (0 – 0.8V) : Reduced Bandwidth
  • (>0.8, < 2.0V) : Undefined
  • High (2.0 – 3.465V) : Full Bandwidth
  • Open : Reduced Bandwidth
  1. Loss of signal is open collector output.
    • It should be pulled up with 4.7 kΩ to 10 kΩ on host board to a voltage between 2.0V and 3.6V.
    • Logic 0 indicates normal operation.
    • Logic 1 indicates loss of signal.

Mechanical Dimensions:

Recommend Circuit Schematic:

Regulatory Compliance:

Feature Reference Performance
Laser Eye Safety FDA 21CFR 1040.10, 1040.11 IEC/EN 60825-1,2 Class 1 laser product
Component Recognition IEC/EN 60950, UL Compatible with standards
ROHS 2002/95/EC Compatible with standards
Electrostatic discharge(ESD) IEC/EN 61000-4-2 Compatible with standards
EMC EN61000-3 Compatible with standards
Electromagnetic Interference(EMI) FCC Part 15 Class B EN 55022 Class B (CISPR 22A) Compatible with standards

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