8.5Gbps SFP+ Fiber Channel Optical Transceiver
Features:
Up to 8.5Gb/s bi-directional data links
Hot Pluggable SFP+ footprintnm DFB transmitter, PIN photo-detector
Transmission distance up to 2km/10km/20km on 9/125 μm SMF
Digital Status monitoring Interface
Duplex LC connector
RoHS compliant and Lead Free Metal enclosure for lower EMI Single 3.3V power supply
Operating case temperature: 0 to 70
Compliant with FC-PI-4 800-Mx-SN-I, SFF-8431 , SFF-8432 and SFF-8472
Applications:
Tri Rate 1.0625/2.125/4.25/8.5Gbs Fiber Channel
Product description:
DF-318G-LRC transceivers are designed for using in Fiber Channel links up to 8.5Gb/s data rate over multimode fiber and compliant to SFI electrical specifications. The transmitter input and receiver output impedance is 100 Ohms differential.
Data lines are internally AC coupled.
The module provides differential termination and reduce differential to common mode conversion for quality signal termination and low EMI.
Pin definition:
The SFP+ modules are hot-pluggable. Hot pluggable refers to plugging in or unplugging a module while the host board is powered. The SFP+ host connector is a 0.8 mm pitch 20 position right angle improved connector specified by SFF-8083, or stacked connector with equivalent with equivalent electrical performance. Host PCB contact assignment is shown in Figure 2 and contact definitions are given in Table 2.
SFP+ module contacts mates with the host in the order of ground, power, followed by signal as illustrated by Figure 3 and the contact sequence order listed in Table 2.
Table 2: SFP+ Module PIN Definition
Absolute maximum rating
These values represent the damage threshold of the module. Stress in excess of any of the individual Absolute Maximum Ratings can cause immediate catastrophic damage to the module even if all other parameters are within Recommended Operating Conditions.
| Parameters | Symbol | Min. | Max. | Unit |
| Power Supply Voltage | VCC | 0 | +3.6 | V |
| Storage Temperature | Tc | -40 | +85 | °C |
| Operating Case Temperature | Tc | 0 | +70 | °C |
| Relative Humidity | RH | 5 | 95 | % |
Table 3: Absolute Maximum Rating
Recommended operating environment
Recommended Operating Environment specifies parameters for which the electrical and optical characteristics hold unless otherwise noted.
| Parameter | Symbol | Min. | Typical | Max | Unit |
| Power Supply Voltage | VCC | 3.135 | 3.300 | 3.465 | V |
| Operating Case Temperature | TC | 0 | 25 | 70 | °C |
Table 4: Recommended Operating Environment
LOW Speed Characteristics
| Parameter | Symbol | Min. | Typical | Max | Unit |
| Power Consumption | | | 1.2 | 1.2 | W |
| TX_Fault,RX_LOS | VOL | 0 | | 0.4 | V |
| VOH | Host_Vcc-0.5 | | Host_Vcc+0.3 | V |
| TX_DIS | VIL | -0.3 | | 0.8 | V |
| VIH | 2.0 | | VCCT+0.3 | V |
| RS0,RS1 | VIL | -0.3 | | 0.8 | V |
| VIH | 2.0 | | VCCT+0.3 | |
Electrical characteristics
Transmitter Input Characteristics
| Parameter | Conditions | Symbol | Min. | Typical | Max | Unit |
| Nominal Data Rate | | VID | 2.125 | 8.5 | 8.5 | Gbd |
| Reference Differential Input Impedance | | Zd | | 100 | | Ω |
| Input AC Common Mode Input Voltage | | | | 0 | 25 | mV
(RMS) |
| Differential Input Voltage Swing | | VID | 150 | | 900 | mV |
| Differential Input S-parameter | 0.01-3.9GHz | SDD11 | | | -10 | dB |
| 3.9-8.5GHz | | Note1 | | Note1 | |
| Differential to Common Mode Conversion Note 2 | 0.01-8.5GHz | SCD11 | | | -10 | dB |
| Data Dependant Jitter | | DDJ | | | 0.1 | UI(p-p) |
| Total Jitter | | TJ | | | 0.28 | UI(P-P) |
| Uncorrelated Jitter | | UJ | | | 0.023 | RMS |
1) Differential Return Loss given by equation SDD11(dB) = -8+13.33 Log10(f/5.5), with f in GHz
2) Common mode reference impedance is 25. Differential to common mode conversion relates to generation of EMI
Receiver Output Characteristics
| Parameter | Conditions | Symbol | Min. | Typical | Max | Unit |
| Nominal Data Rate | | VID | 2.125 | 8.5 | 8.5 | Gbd |
| Reference Differential Input Impedance | | Zd | | 100 | | Ω |
| Termination Mismatch | | ΔZd
| | | 5 | % |
| Output AC Common Mode Input Voltage | | | | | 15 | mV
(RMS) |
| Output Rise and Fall time | 20% to 80% | tRH, tFH
| | | 35 | ps |
| Differential Input Voltage Swing | Zload=100ohm | VOD | 350 | | 800 | mV |
| Differential Input S-parameter | 0.01-3.9GHz | SDD22 | | | -10 | dB |
| 3.9-8.5GHz | | Note1 | | Note1 | |
| Differential to Common Mode Conversion Note2 | 0.01-6.5GHz | SCCD22 | | | -7 | dB |
| Differential to Common Mode Conversion Note2 | 6.5-8.5GHz | SCCD22 | | | -3 | dB |
| Data Dependant Jitter | | DDJ | | | 0.42 | UI(p-p) |
| Total Jitter | | TJ | | | 0.71 | UI(P-P) |
1) Return Loss given by equation Sxx22(dB) = -8+13.33 Log10(f/5.5), with f in GHz
2) Common mode reference impedance is 25. Common mode return loss helps absorb reflection and noise improving EMI
General Specifications
| Parameter | Symbol | Min. | Typical | Max | Unit | Notes |
| Data Rate | DR | | 1.0625
2.125
4.25
8.5 | | Gb/sec | |
Fiber Length on 9/125um SMF
| L | | | 20 | km | 1 |
| | | 20 | km | 2 |
| | | 20 | km | 3 |
| | | 20 | km | 4 |
1) At 1.0625 Gb/s Fibre Channel data rate.
2) At 2.125 Gb/s Fibre Channel data rate.
3) At 4.25 Gb/s Fibre Channel data rate.
4) At 8.5 Gb/s Fibre Channel data rate.
Optical characteristics
| Parameter | Symbol | Min. | Typical | Max | Unit | Notes |
| Transmitter |
| Center Wavelength | λt | 1284 | 1310 | 1345 | nm | |
| RMS spectral width | Pm | - | - | 1 | nm | |
| Average Optical Power | Pavg | -9.0 | - | -1 | dBm | 2 |
| Extinction Ratio | ER | 3.5 | - | - | dB | 3,4,5,6 |
Relative Intensity Noise
| Rin | | | -128 | dB/Hz | |
| Receiver |
| Center Wavelength | λr | 1260 | - | 1360 | nm | |
| Receiver Sensitivity | Psens | - | - | -14.4 | dBm | 3 |
| Psens | | | -18 | dBm | 4 |
| Psens | | | -23 | dBm | 5 |
| Psens | | | -25 | dBm | 6 |
| LOS Assert | Los | -30 | - | | dBm | |
| LOS De-assert | | | | -19 | | |
| Overload | Pin | - | - | -1.0 | dBm | 3 |
| Receiver Reflectance | | - | - | -12 | dB | |
Note: 1. The following optical characteristics are defined over the Recommended Operating Environment unless otherwise specified.
2.The optical power is launched into MMF
3.Measured with a PRBS 2 7-1 test pattern @8.5Gbps,BER≤10-12 2km/10km/20km
4.Measured with a PRBS 2 7-1 test pattern @4.25Gbps,BER≤10-12 2km/10km/20km.
5.Measured with a PRES 2 7-1 test pattern @2.125Gbps,BER≤10-12 2km/10km/20km.
6. Measured with a PRES 2 7-1 test pattern @1.0625Gbps,BER≤10-12 2km/10km/20km.
Digital Diagnostic Functions
The following digital diagnostic characteristics are defined over the Recommended Operating Environment unless otherwise specified. It is compliant to SFF8472 Rev9.2 with internal calibration mode. For external calibration mode please contact our sales stuff.
| Parameter | Symbol | Min. | Max | Unit | Notes |
| Accuracy |
| Transceiver Temperature | DMI_Temp | -3 | +3 | degC | Over operating temp |
| TX Output optical power | DMI_TX | -3 | +3 | dB | |
| RX Input optical power | DMI_RX | -3 | +3 | dB | -3dBm to -12dBm range |
| Transceiver Supply voltage | DMI_VCC | -0.08 | +0.08 | V | Full operating range |
| Bias current monitor | DMI_Ibias | -10% | 10% | mA | |
| Dynamic Range Accuracy |
| Transceiver Temperature | DMI_Temp | -5 | 70 | degC | |
| TX Output optical power | DMI_TX | -9 | -1 | dBm | |
| RX Input optical power | DMI_RX | -18 | 0 | dBm | |
| Transceiver Supply voltage | DMI_VCC | 3.0 | 3.6 | V | |
| Bias current monitor | DMI_Ibias | 0 | 16 | mA | |
Our products cover:
Patch Cords,Pigtail /MPO(MTP)/ Optical Fiber Cable/Optic Terminal Box / ODF,Patch Panels /Optic Splice Closure / SFP Module/ Media Converter / Video Optical transceiver /Connector /Adapter / AttenuatorCoupler / PLC Splitter / CWDM / DWDM / FWDM / OADM etc.
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