Table 1: SFP+ SR Operating Range for each Optical Fiber Type
The SFP+ SR module electrical interface is 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. SFI typically operates over 200 mm
of improved FR4 material or up to about 150mmof standard FR4 with
one connector.
The transmitter converts 10Gbit/s serial PECL or CML electrical
data into serial optical data compliant with the 10GBASE-SR
standard. An open collector compatible Transmit Disable (Tx_Dis) is
provided. A logic “1,” or no connection on this pin will disable
the laser from transmitting. A logic “0” on this pin provides
normal operation. The transmitter has an internal automatic power
control loop (APC) to ensure constant optical power output across
supply voltage and temperature variations. An open collector
compatible Transmit Fault (TFault) is provided. TX_Fault is a
module output contacts that when high, indicates that the module
transmitter has detected a fault condition related to laser
operation or safety. The TX_Fault output contact is an open
drain/collector and shall be pulled up to the Vcc_Host in the host
with a resistor in the range 4.7-10 kΩ. TX_Disable is a module
input contact. When TX_Disable is asserted high or left open, the
SFP+ module transmitter output shall be turned off. This contact
shall be pulled up to VccT with a 4.7 kΩ to 10 kΩ resistor
The receiver converts 10Gbit/s serial optical data into serial
PECL/CML electrical data. An open collector compatible Loss of
Signal is provided. Rx_LOS when high indicates an optical signal
level below that specified in the relevant standard. The Rx_LOS
contact is an open drain/collector output and shall be pulled up to
Vcc_Host in the host with a resistor in the range 4.7-10 kΩ, or
with an active termination. Power supply filtering is recommended
for both the transmitter and receiver. The Rx_LOS signal is
intended as a preliminary indication to the system in which the
SFP+ is installed that the received signal strength is below the
specified range. Such an indication typically points to
non-installed cables, broken cables, or a disabled, failing or a
powered off transmitter at the far end of the cable.
Features of 10g SFP+SR Module
● Optical interface compliant to IEEE 802.3ae 10GBASE-SR
● Electrical interface compliant to SFF-8431
● Hot Pluggable
● 850nm VCSEL transmitter, PIN photo-detector
● Maximum link length of 300m on 2000MHz/km MMF
● Operating case temperature: 0 to 70℃
● Low power consumption
● All-metal housing for superior EMI performance
● Advanced firmware allow customer system encryption information to
be stored in transceiver
● Cost effective SFP+ solution, enables higher port densities and
greater bandwidth
Applications
● 10GBASE-SR at 10.3125Gbps
● 10GBASE-SW at 9.953Gbps
● Other optical links
Specifications
| Product NO. | SPT-P85TG-SR/SPT-P85TG-SRH |
| Wavelength | 850nm |
| Product name | 10g SFP+ module |
| Transmission Distance | 300m |
| Operating temperature | Standard: 0 to +70°C |
| Date rate | 10Gbps |
| Aplications | 10g ethernet |
| Power supply | Single 3.135~3.465V |
| Package Type | SFP+ |
Optical Characteristics
The following optical characteristics are defined over the
Recommended Operating Environment unless otherwise specified.
| Parameter | Symbol | Min. | Typical | Max | Unit | Notes |
| Transmitter |
| Center Wavelength | λt | 840 | 850 | 860 | nm | |
| RMS spectral width | Pm | - | - | 4 | nm | |
| Average Optical Power | Pavg | -5 | - | -1 | dBm | 2 |
| Extinction Ratio | ER | 3 | - | - | dB | 3 |
| Transmitter Dispersion Penalty | TDP | - | - | 3.9 | dB | |
| Relative Intensity Noise | Rin | - | - | -128 | dB/Hz | 12dB reflection |
| Optical Return Loss Tolerance | | - | - | 12 | dB | |
| Receiver |
| Center Wavelength | λr | 840 | 850 | 860 | nm | |
| Receiver Sensitivity | Psens | - | - | -11 | dBm | 4 |
| Stressed Sensitivity in OMA | | - | - | -8 | dBm | 4 |
| Los function | Los | -30 | - | -12 | dBm | |
| Overload | Pin | - | - | 0 | dBm | 4 |
| Receiver Reflectance | | - | - | -12 | dB | |
| LOS De-Assert | LOSD | | | -13 | dBm | |
| LOS Assert | LOSA | -23 | | | dBm | |
unless otherwise specified.
Notes:
1. Trade-offs are available between spectral width, center
wavelength and minimum OMA, as shown in table 6.
2. The optical power is launched into MMF
3. Measured with a PRBS 231-1 test pattern @10.3125Gbps
4. Measured with a PRBS 231-1 test pattern @10.3125Gbps,BER≤10-12.
Ordering information
| Part Number | Product Description |
| SPT-P85TG-SR | Transceiver SFP+ 850nm 10G LC Connector 300m with DDM Commercial
Temperature |
| SPT-P85TG-SRH | Transceiver SFP+ 850nm 10G LC Connector 300m with DDM Commercial
Temperature HP |
