155Mbps SM SFP transceiver (20km)
Features:
1) Single power supply: 3.3V
2) Small form factor pluggable (SFP) MSA compatible
3) LVPECL compatible signal interface
4) Duplex LC connector
Applications:
1) ATM switches and routers
2) SONET/SDH switches infrastructure
3) Fast Ethernet application
Absolute maximum ratings:
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Operating conditions:
Transmitter: T=0 to+70°C, Vcc=3.13~3.47V
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Receiver: T=0 to + 70°C, Vcc=3.13~3.47V (+3.3V)
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Block diagram of transceiver:
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Pin assignment and function definitions:
It is the responsibility of the system integrator to assure that no thermal, energy,
or voltage hazard exists during the hot-plug-unplug sequence. It is also the
responsibility of the system integrator and end-user to minimize static electricity
and the probability of ESD events by careful design.
SFP transceiver electrical pad layout:
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Pin assignment:
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Functions:
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Notes:
1. TX fault is an open collector output, which should be pulled up with a 4.7K~10K
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. 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~10K resistor. Its states are:
Low (0~0.8V)
Transmitter on (>0.8V, <2.0V)
Undefined high (2.0~3.465V)
Transmitter disabled open
Transmitter disabled
3. MOD-DEF 0, 1 and 2 are the module definition pins, should be pulled up with a
4.7K~10K 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 interfaces for serial ID. MOD-DEF 2 is
the data line of two wire serial interfaces for serial ID
4. LOS is an open collector output, which should be pulled up with a 4.7K~10K 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. AC coupled 100 differential lines
should be terminated with 100 (differential), at the user serves
6. These are the differential transmitter inputs: AC-coupled, differential lines
with 100 differential terminations inside the module
Recommended host board supply filtering network:
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Example SFP host board schematic SFP:
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Mechanical:
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Order Information:
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