Pin Description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
RX_LOS
V
EE
R
V
EE
R
V
EE
R
RD-
RD+
V
EE
R
V
CC
R
V
CC
T
V
EE
T
TD+
TD-
V
EE
T
Name
V
EE
T
TX_FAULT
TX_DISABLE
MOD-DEF2
MOD-DEF1
MOD-DEF0
Function/Description
Transmitter Ground
Transmitter Fault Indication - High indicates a fault condition
Transmitter Disable - Module optical output disables on high or open
Module Definition 2 - Two wire serial ID interface data line (SDA)
Module Definition 1 - Two wire serial ID interface clock line (SCL)
Module Definition 0 - Grounded in module (module present indicator)
No connect
Loss of Signal - High indicates loss of received optical signal
Receiver Ground
Receiver Ground
Receiver Ground
Inverse Received Data Out
Received Data Out
Receiver Ground
Receiver Power +3.3 V
Transmitter Power +3.3 V
Transmitter Ground
Transmitter Data In
Inverse Transmitter Data In
Transmitter Ground
Notes
1
2
3
3
3
4
5
5
6
6
7
7
Notes:
1. TX_FAULT is an open collector/drain output, which should be pulled up with a 4.7 k – 10 kW resistor on the host board. When high, this 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.
2. TX_DISABLE is an input that is used to shut down the transmitter optical output. It is pulled up within the transceiver with a 4.7 k – 10 kW resistor.
Low (0 – 0.8 V): Transmitter on
Between (0.8 V and 2.0 V): Undefined
High (2.0 – V
CC
max): Transmitter Disabled
Open: Transmitter Disabled
3. The signals Mod-Def 0, 1, 2 designate the two wire serial interface pins. They should be pulled up with a 4.7 k – 10 kW resistor on the host board.
Mod-Def 0 is grounded by the module to indicate the module is present
Mod-Def 1 is serial clock line (SCL) of two wire serial interface
Mod-Def 2 is serial data line (SDA) of two wire serial interface
4. RX_LOS (Rx Loss of Signal) is an open collector/drain output that should be pulled up with a 4.7 k – 10 kW resistor on the host board. When high,
this output indicates the received optical power is below the worst case receiver sensitivity (as defined by the standard in use). Low indicates
normal operation. In the low state, the output will be pulled to < 0.8 V.
5. RD-/+ designate the differential receiver outputs. They are ac coupled 100
W
differential lines which should be terminated with 100
W
differential at
the host SerDes. Ac coupling is done inside the transceiver and is not required on the host board. The voltage swing on these lines will be between
500 and 2000 mV differential (250 – 1000 mV single ended) when properly terminated.
6. V
CC
R and V
CC
T are the receiver and transmitter power supplies. They are defined at the SFP connector pin. The maximum supply current is 210 mA
and the associated inrush current will typically be no more than 30 mA above steady state after 500 nanoseconds.
7. TD-/+ designate the differential transmitter inputs. They are ac coupled differential lines with 100
W
differential 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 differential swings of 500 – 2400 mV (250 –
1200 mV single ended).
6
6
AVAGO [ AVAGO TECHNOLOGIES LIMITED ]
