Cisco SFP 10G LR

sfp

Cisco SFP 10G LR is a SFP+ transceiver works with 1310nm single mode fiber for max 10km, we supply the SFP 10 LR Cisco equivalent transceivers.

This 1310 nm DFB 10Gigabit SFP 10G LR SFP+ transceiver is designed to transmit and receive optical data over single mode optical fiber for link length 10km. 

In the transmit direction, the SFP 10G LR transceiver module receives a 10.3125 Gb/s electrical signal (signaling rate) from the host board Asic/SerDes and converts the data to an optical signal via the Laser Driver that controls the Laser diode in the Transmitter Optical Sub-Assembly (TOSA).  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 SFP 10G LR 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 contact 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 SFP 10G LR SFP plus 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 SFP 10G LR 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 SFP 10G LR 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. SFP 10G LR 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.
The 3rd functional capability of the SFP+ module is the 2 wire serial, I2C, interface.  I2C is used for serial ID, digital diagnostics, and module control functions. The SFP 10G LR enhanced digital diagnostics monitoring interface allows real time access to the device allowing monitor of received optical power, laser bias current, laser optical output power, etc.

SFP+ LR Features
Optical interface compliant to IEEE 802.3ae 10GBASE-LR
Electrical interface compliant to SFF-8431
Hot Pluggable
1310nm DFB transmitter, PIN photo-detector
Operating case temperature: 0 to 70 °C
Low power consumption
Applicable for 10km SMF connection
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

SFP 10G LR Applications
10GBASE-LR at 10.3125Gbps
10GBASE-LW at 9.953Gbps
Other optical links


Evergreen Communications

Factory add: HLD industrial area, ShiYan, Baoan district, Shenzhen, China 518000
Tel:+852.30788803
Fax:+852.30788854

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