Description
Overview:
This 8.5 Gigabit XFP DWDM Transceiver is used with single mode optical fiber to reach up to 24.85 miles (40km) transmission distance. It is designed for serial optical data communications such as 8G Fiber Channel. This transceiver supports the C-band wavelength .It has a Cooled DWDM EML type transceiver and PIN type receiver integrated with a trans-impedance preamplifier (TIA) and signal conditioner. This Dense Wavelength Division Multiplexing small form-factor pluggable (XFP DWDM) transceiver provides built-in Digital Diagnostics Functions. It complies with 8G Fiber channel and RoHS lead free standards.
Key Features:
- Up to 24.85 miles (40km) transmission distance.
- Cooled DWDM EML and PIN Receiver
- Supports 8.5Gb/s Data link.
- Supports the C-band wavelength range between 1528.77nm to 1567.13nm
- Hot-pluggable XFP footprint
- Supports Line-side and XFI loopback
- RoHS-6 Compliant (lead-free)
- Power dissipation <3.5W
- Single 3.3 V power supply.
- Compliance with Fiber Channel FC-PI-4 800-SM-LL-L
- Full Duplex LC connector
- No Reference Clock required
- Built-in digital diagnostic functions
- AC/AC Coupling according to MSA
- Case operating temperature range from 23 °F to 158 °F (-5°C to 70°C)
Technical Specifications:
| Working Range | Up to 24.85 miles (40km) |
| Standards | 8G Fiber Channel
XFP MSA RoHS-6 compliant. |
| Memory | 256 byte EEPROM |
| Data rate | 8.5Gb/s |
| Wavelength range | 1528.77nm to 1567.13nm |
| Connector | LC |
| Transmitter | DWDM EML |
| Receiver | PIN |
| Transmitter output optical Power | 0 dBm to 4 dBm |
| Fiber type | 9/125 mm single-mode |
| Receiver Sensitivity | -16.5 dBm |
| Receiver Input Saturation Power | 0.5 dBm |
| Supply Voltage | 3.3 V |
| Maximum Power Consumption | <3.5 W |
| Transmitter Input Differential Impedance | 100Ω |
| Dimensions | 3.07in x 0.72in x 0.45in (L 78mm x W18.3mm x H 11.4mm) |
| Relative Humidity | 5% to 95% |
| Storage Temperature | -40 °F to 185 °F (-40°C to 85°C) |
| Case Operating Temperature | 23 °F to 158 °F (-5°C to 70°C) |
Additional Information:
Applications
Ideal to be used on applications such as
- Multi-rate 8x/4x/2x Fiber Channel
Order Information:
| Product ID | Media | Wavelength
(nm) |
Transmission Distance | Temperature Range |
| GAO-XFPDW -104
|
single-mode fiber | Refer to wavelength selection | 24.85 miles (40km) | 23 °F to 158 °F (-5°C to 70°C)
|
Wavelength Selection:
C-band λc Wavelength Guide Pin Descriptions
| Channel | Wavelength(nm) | Frequency(THZ) | Channel | Wavelength(nm) | Frequency(THZ) |
| C13 | 1567.13 | 191.30 | C37 | 1547.72 | 193.70 |
| C14 | 1566.31 | 191.40 | C38 | 1546.92 | 193.80 |
| C15 | 1565.50 | 191.50 | C39 | 1546.12 | 193.90 |
| C16 | 1564.68 | 191.60 | C40 | 1545.32 | 194.00 |
| C17 | 1563.86 | 191.70 | C41 | 1544.53 | 194.10 |
| C18 | 1563.05 | 191.80 | C42 | 1543.73 | 194.20 |
| C19 | 1562.23 | 191.90 | C43 | 1542.94 | 194.30 |
| C20 | 1561.42 | 192.00 | C44 | 1542.14 | 194.40 |
| C21 | 1560.61 | 192.10 | C45 | 1541.35 | 194.50 |
| C22 | 1559.79 | 192.20 | C46 | 1540.56 | 194.60 |
| C23 | 1558.98 | 192.30 | C47 | 1539.77 | 194.70 |
| C24 | 1558.17 | 192.40 | C48 | 1538.98 | 194.80 |
| C25 | 1557.36 | 192.50 | C49 | 1538.19 | 194.90 |
| C26 | 1556.55 | 192.60 | C50 | 1537.40 | 195.00 |
| C27 | 1555.75 | 192.70 | C51 | 1536.61 | 195.10 |
| C28 | 1554.94 | 192.80 | C52 | 1535.82 | 195.20 |
| C29 | 1554.13 | 192.90 | C53 | 1535.04 | 195.30 |
| C30 | 1553.33 | 193.00 | C54 | 1534.25 | 195.40 |
| C31 | 1552.52 | 193.10 | C55 | 1533.47 | 195.50 |
| C32 | 1551.72 | 193.20 | C56 | 1532.68 | 195.60 |
| C33 | 1550.92 | 193.30 | C57 | 1531.90 | 195.70 |
| C34 | 1550.12 | 193.40 | C58 | 1531.12 | 195.80 |
| C35 | 1549.32 | 193.50 | C59 | 1530.33 | 195.90 |
| C36 | 1548.51 | 193.60 | C60 | 1529.55 | 196.00 |
| Non-ITU | Peak wavelength between 1528.77nm-1567.13 | C61 | 1528.77 | 196.10 | |
Digital Diagnostics Functions:
- GAOTek GAO- XFPDW -104 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.
General Specifications:
| Parameter | Symbol | Min | Type | Max | Unit | Note |
| Bit Rate | BR | 8.5 | Gb/s | |||
| Bit Error Ratio | BER | 10-12 | 1 | |||
| Maximum Supported Distances | 40 | km |
Notes:
- Tested with a 2 31 – 1 PRBS
Electrical characteristics:
| Parameter | Symbol | Min | Type | Max | Unit | Note |
| Module Total Power | 3.5 | W | 1 | |||
| Transmitter | ||||||
| Input Differential Impedance | Rin | 100 | Ω | 2 | ||
| Single ended data input swing | Vin, pp | 120 | 820 | mV | ||
| Transmit Disable Voltage | VD | 2.0 | Vcc | V | 3 | |
| Transmit Enable Voltage | Ven | GND | GND+ 0.8 | V | ||
| Transmit Disable Assert Time | 10 | us | ||||
| Receiver | ||||||
| Differential data output swing | Vout,pp | 340 | 650 | 850 | mV | 4 |
| Data output rise time | tr | 38 | ps | 5 | ||
| Data output fall time | tf | 38 | ps | 5 | ||
| LOS Fault | VLOS fault | Vcc–0.5 | VccHOST | V | 6 | |
| LOS Normal | VLOS norm | GND | GND+0.5 | V | 6 | |
| Power Supply Rejection | PSR | 7 | ||||
Notes:
- Maximum total power value is specified across the full temperature and voltage range
- After internal AC coupling
- Open circuit
- Into 100 ohms differential termination
- These are unfiltered 20-80% values
- 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.
- As per the XFP MSA Specification 1.
Optical Characteristics:
| Parameter | Symbol | Min | Type | Max | Unit |
| Transmitter | |||||
| Average Optical Power | PAVE | 0 | 4 | dBm | |
| Optical Wavelength | λ | λc -100 | λc -100 | nm | |
| Optical Extinction Ratio | ER | 8.2 | dB | ||
| Average Launch power of transmitter | POFF | -30 | dBm | ||
| Side mode Suppression ratio | SMSR | 30 | dB | ||
| Tx Jitter Generation(peak-to-peak) | Jp-p | – | – | 0.1 | UI |
| Transmitter and Dispersion Penalty | TDP | 2 | dB | ||
| Relative Intensity Noise | RIN | -130 | dB/Hz | ||
| Receiver | |||||
| Receiver Sensitivity | PSEN | -16.5 | dBm | ||
| Wavelength Range | λC | 1260 | 1600 | nm | |
| Input Saturation Power (Overload) | Psat | 0.5 | dBm | ||
| Receiver Reflectance | Rrx | -27 | dB | ||
| LOS Assert | LOSA | -28 | dBm | ||
| LOS De -Assert | LOSD | -22 | dBm | ||
| LOS Hysteresis | 0.5 | dB |
PIN Diagram:
PIN Descriptions:
| Pin | Logic | Symbol | Name/Description | Note |
| 1 | GND | Module Ground | 1 | |
| 2 | VEE5 | Optional –5.2 Power Supply – Not required | ||
| 3 | LVTTL-I | Mod-Desel | Module De-select; When held low allows the module to respond to 2-wire serial interface commands | |
| 4 | LVTTL-O | Interrupt | Interrupt (bar); Indicates presence of an important condition which can be read over the serial 2-wire interface | 3 |
| 5 | LVTTL-I | TX_DIS | Transmitter Disable; Transmitter laser source turned off | |
| 6 | VCC5 | +5 Power Supply | ||
| 7 | GND | Module Ground | 1 | |
| 8 | VCC3 | +3.3V Power Supply | ||
| 9 | VCC3 | +3.3V Power Supply | ||
| 10 | LVTTL-I | SCL | Serial 2-wire interface clock | |
| 11 | LVTTL-I/O | SDA | Serial 2-wire interface data line | 3 |
| 12 | LVTTL-O | Mod_Abs | Module Absent; Indicates module is not present. Grounded in the module. | 3 |
| 13 | LVTTL-O | Mod_NR | Module Not Ready; GAOTek defines it as a logical OR between RX_LOS and Loss of Lock in TX/RX. | 3 |
| 14 | LVTTL-O | RX_LOS | Receiver Loss of Signal indicator | 3 |
| 15 | GND | Module Ground | 1 | |
| 16 | GND | Module Ground | 1 | |
| 17 | CML-O | RD- | Receiver inverted data output | |
| 18 | CML-O | RD+ | Receiver non-inverted data output | |
| 19 | GND | Module Ground | 1 | |
| 20 | VCC2 | +1.8V Power Supply – Not required | ||
| 21 | LVTTL-I | P_Down/RST | Power 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. | ||||
| 22 | VCC2 | +1.8V Power Supply – Not required | ||
| 23 | GND | Module Ground | 1 | |
| 24 | PECL-I | RefCLK | Reference Clock non-inverted input, AC coupled on the host board –Not required | 2 |
| 25 | PECL-I | RefCLK- | Reference Clock inverted input, AC coupled on the host board – Not required | 2 |
| 26 | GND | Module Ground | 1 | |
| 27 | GND | Module Ground | 1 | |
| 28 | CML-I | TD- | Transmitter inverted data input | |
| 29 | CML-I | TD+ | Transmitter non-inverted data input | |
| 30 | GND | Module Ground | 1 |
Notes:
- Module circuit ground is isolated from module chassis ground within the module.
- A Reference Clock input is not required .If present, it will be ignored.
- Open collector; should be pulled up with 4.7kΩ – 10kΩ on host board to a voltage between 3.15V and 3.6V
PCB Layout and Bezel Recommendations:
XFP Host Board Mechanical Layout (dimensions are in mm)
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:
| 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 |
