AFCT-5745Z Datasheet, PDF (5/18 Pages) AVAGO TECHNOLOGIES LIMITED – RoHS-6 Compliant

Table 1. Pin-out Table
The pin arrangement and definition of this product meets SFP MSA. Table 1 lists the pin description.
Pin
Name
1
V_EET
2
TX_FAULT
3
TX_DISABLE
4
MOD-DEF 2
5
MOD-DEF 1
6
MOD-DEF 0
7
Rate Select
8
LOS
9
V_EER
10
V_EER
11
V_EER
12
RD-
13
RD+
14
V_EER
15
V_CCR
16
V_CCT
17
V_EET
18
TD+
19
TD-
20
V_EET
Function/Description
Transmitter Ground
Transmitter Fault Indication
Transmitter Disable - Module disables on high or open
Module Definition 2 - Two wire serial ID interface
Module Definition 1 - Two wire serial ID interface
Module Definition 0 - Grounded in module
Not Connected
Loss of Signal
Receiver Ground
Receiver Ground
Receiver Ground
Inverse Received Data Out
Received Data Out
Receiver Ground
Receiver Power - 3.3 V ±5%
Transmitter Power - 3.3 V ±5%
Transmitter Ground
Transmitter Data In
Inverse Transmitter Data In
Transmitter Ground
Notes
Note 1
Note 2
Note 3
Note 3
Note 3
Note 4
Note 5
Note 5
Note 5
Note 6
Note 6
Note 5
Note 7
Note 7
Note 5
Note 8
Note 8
Note 5
Notes:
1. TX_FAULT is an open collector/drain output which should be pulled up externally with a 4.7 – 10 KW resistor on the host board to a supply <
V_CC +0.3 V. 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 input is used to shut down the laser output per the state table below (internal 10 KW pull-up resistor).
Low (0 – 0.8 V):
Transmitter on
Between (0.8 V and 2.0 V): Undefined
High (2.0 – 3.465 V):
Transmitter Disabled
Open:
Transmitter Disabled
3. Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7-10 KW resistor on the host board to a supply less
than V_CCT +0.3 V or V_CCR +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 4.7 – 10 KW resistor on the host board to
a supply < V_CCT,R+0.3 V. 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. Please see later section for LOS
timing.
5. V_EER and V_EET are internally connected within the SFP module
6. RD-/+: These are the differential receiver outputs. They are ac coupled 100 W differential lines which should be terminated with 100 W differ-
ential 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 370 and 2000 mV differential (185 – 1000 mV single ended) when properly terminated.
7. V_CCR and V_CCT are the receiver and transmitter power supplies. They are defined as 3.1 – 3.5 V at the SFP connector pin. The maximum supply
current is 300 mA. V_CCR and V_CCT are internally connected. See the Application Note for further recommendations on power supply filtering.
8. TD-/+: These are the differential transmitter inputs. They are ac coupled differential lines with 100 W differential termination inside the mod-
ule. 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).