155M Bi-directional SFP Transceiver
20km point to point transmission
Low (0~0.8V):
(>0.8V, <2.0V):
High (2.0~3.465V):
Open:
Transmitter on
Undefined
Transmitter Disabled
Transmitter Disabled
Jun. 12, 2007
3. MOD-DEF 0,1,2 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 on the host board to
a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.
In the low state, the output will be pulled to less than 0.8V.
5. These are the differential receiver outputs. They are AC-coupled 100Ω differential lines which should be
terminated with 100Ω (differential) at the user SERDES.
These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ω differential
termination inside the module.
Mechanical Design Diagram
The mechanical design diagram is shown in Figure 4.
Figure 4, Product Mechanical Design Diagram
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SOURCE [ SOURCE PHOTONICS, INC. ]
