7
Table 2. Pin description
Pin Name Function/Description MSA Notes
1 VeeT Transmitter Ground
2 TX Fault Transmitter Fault Indication Note 1
3 TX Disable Transmitter Disable - Module disables on high or open Note 2
4 MOD-DEF2 Module De nition 2 - Two wire serial ID interface Note 3
5 MOD-DEF1 Module De nition 1 - Two wire serial ID interface Note 3
6 MOD-DEF0 Module De nition 0 - Grounded in module Note 3
7 Rate Select Not Connected
8 LOS Loss of Signal Note 4
9 VeeR Receiver Ground
10 VeeR Receiver Ground
11 VeeR Receiver Ground
12 RD- Inverse Received Data Out Note 5
13 RD+ Received Data Out Note 5
14 VeeR Receiver Ground
15 VccR Receiver Power - 3.3 V ±5% Note 6
16 VccT Transmitter Power - 3.3 V ±5% Note 6
17 VeeT Transmitter Ground
18 TD+ Transmitter Data In Note 7
19 TD- Inverse Transmitter Data In Note 7
20 VeeT Transmitter Ground
Notes:
1. TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10K resistor on the host board. Pull up voltage between
2.0 V and VccT, R+0.3 V. When high, output indicates a laser fault of some kind. Low indicates normal operation. In the low state, the output will
be pulled to < 0.8 V. By default, TX Fault is set to trigger only on hardware faults.
2. TX Disable input is used to shut down the laser output per the state table below with an external 4.7 - 10 K pull-up resistor.
Low (0 - 0.8 V): Transmitter on
Between (0.8 V and 2.0 V): Unde ned
High (2.0 - 3.465 V): Transmitter Disabled
Open: Transmitter Disabled
3. MOD-DEF 0,1,2. These are the module de nition pins. They should be pulled up with a 4.7 - 10 K resistor on the host board to a supply less
than VccT +0.3 V or VccR+0.3 V.
MOD-DEF 0 is grounded by the module to indicate that the module is present
MOD-DEF 1 is clock line of two wire serial interface for optional serial ID
MOD-DEF 2 is data line of two wire serial interface for optional serial ID
4. LOS (Loss of Signal) is an open collector/drain output which should be pulled up externally with a 4.7K - 10 K resistor on the host board to a
supply < VccT,R+0.3 V. When high, this output indicates the received optical power is below the worst case receiver sensitivity (as de ned by
the standard in use). Low indicates normal operation. In the low state, the output will be pulled to < 0.8 V.
5. RD-/+: These are the di erential receiver outputs. They are ac coupled 100 di erential lines which should be terminated with 100 di erential
at the user SERDES. The ac coupling is done inside the module and is thus not required on the host board. The voltage swing on these lines will
be between 250 and 2000 mV di erential (160 - 1000 mV single ended) when properly terminated.
6. VccR and VccT are the receiver and transmitter power supplies. They are de ned as 3.135 - 3.465 V at the SFP connector pin. The maximum sup-
ply current is 250 mA and the associated inrush current will be no more than 30 mA above steady state after 500 nanoseconds.
7. TD-/+: These are the di erential transmitter inputs. They are ac coupled di erential lines with 100 di erential termination inside the module.
The ac coupling is done inside the module and is thus not required on the host board. The inputs will accept di erential swings of 500 - 2400
mV (250 - 1200 mV single ended), though it is recommended that values between 500 and 1200 mV di erential (250 - 600 mV single ended) be
used for best EMI performance.
