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1.25G GLC-LH-SM Optical Transceiver.

Dualfiber Singlmode 1310nm 10KM

Features

Dual data-rate of 1.25Gbps operation

1310nm FP laser and PIN photodetector for 10KM transmission

Compliant with SFP MSA and SFP-LH-SM with duplex LC receptacle

Digital Diagnostic Monitoring:

Internal Calibration or External Calibration

Compatible with RoHS

+3.3V single power supply

Operating case temperature:

Standard :  0 to +70°C

Industrial : -40 to +85°C

Applications

Gigabit Ethernet

Fiber Channel

Switch to Switch interface

Switched backplane applications

outer/Server interface

Other optical transmission systems

Description

The SFP transceivers are high performance, cost effective modules supporting dual data-rate of 1.25Gbps and 10KM transmission distance with SMF.

The transceiver consists of three sections: a FP laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.

The transceivers are compatible with SFP Single-Source Agreement (MSA) and SFF For further information, please refer to SFP MSA.

 

 

 

 
 

 

 

 

 

 

 

 

Notes:

Plug Seq.: Pin engagement sequence during hot pl ing.

1) TX Fault is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; Logic 1 indicates a laser fault of some kind. In the low state, the output will be pulled to less than 0.8V.

2) TX Disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7k~10kΩ resistor. Its states are:

Low (0 to 0.8V):             Transmitter on

(>0.8V, < 2.0V):             Undefined

High (2.0 to 3.465V):         Transmitter Disabled

Open:                      Transmitter Disabled

3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7k~10kΩ resistor on the host board. The pull-up voltage shall be VccT or VccR.

Mod-Def 0 is grounded by the module to indicate that the module is present

Mod-Def 1 is the clock line of two wire serial interface for serial ID

Mod-Def 2 is the data line of two wire serial interface for serial ID

4) LOS is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor. Pull up voltage between 2.0V and Vcc+0.3V. Logic 1 indicates loss of signal; Logic 0 indicates normal operation. In the low state, the output will be pulled to less than 0.8V.

5) RD-/+: These are the differential receiver outputs. They are internally AC-coupled 100 differential lines which should be terminated with 100Ω (differential) at the user SERDES.

6) TD-/+: These are the differential transmitter inputs. They are internally AC-coupled, differential lines with 100Ω differential termination inside the module.

 

Recommended Interface Circuit

 

 
 

 

 

 

 

 

 

 

 

 

 

 

Mechanical Dimensions