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參數資料
| 型號： | AFBR-57D7APZ |
| 元件分類： | 光收發(fā) |
| 英文描述： | FIBER OPTIC TRANSCEIVER, 840-860nm, 8500Mbps(Tx), 8500Mbps(Rx), SURFACE MOUNT, LC CONNECTOR |
| 封裝： | ROHS COMPLIANT PACKAGE |
| 文件頁數： | 17/19頁 |
| 文件大?。?/td> | 246K |
| 代理商： | AFBR-57D7APZ |
7
Notes:
1. TX_FAULT is an open collector/drain output, which must be pulled up with a 4.7 k – 10 kΩ 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 < 0.8V.
2. TX_DISABLE is an input that is used to shut down the transmitter optical output. It is internally pulled up (within the transceiver) with a 6.8 kΩ
resistor.
Low (0 – 0.8 V):
Transmitter on
Between (0.8 V and 2.0 V):
Undefined
High (2.0 – Vcc max) or OPEN:
Transmitter Disabled
3. The signals Mod-Def 0, 1, 2 designate the two wire serial interface pins. They must be pulled up with a 4.7 k – 10 kΩ 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 must be pulled up with a 4.7 k – 10 kΩ 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 < 0.8V.
5. RD-/+ designate the differential receiver outputs. They are AC coupled 100 Ω differential lines which should be terminated with 100 Ω differ-
ential at the host SERDES input. AC coupling is done inside the transceiver and is not required on the host board. The voltage swing on these
lines will be between 370 and 850 mV differential (185 – 425 mV single ended) when properly terminated.
6. VccR and VccT are the receiver and transmitter power supplies. They are defined at the SFP connector pin. The maximum supply current is 300
mA and the associated in-rush current will typically be no more than 30 mA above steady state after 2 microseconds.
7. TD-/+ designate the differential transmitter inputs. They are AC coupled differential lines with 100 Ω differential termination inside the module.
The AC coupling is done inside the module and is not required on the host board. The inputs will accept differential swings of 180 – 1200 mV
(90 – 600 mV single ended)
Table 2. Pin Description
Pin
Name
Function/Description
Notes
1
VeeT
Transmitter Ground
2
TX_FAULT
Transmitter Fault Indication – High indicates a fault condition
Note 1
3
TX_DISABLE
Transmitter Disable – Module electrical input disables on high or open
Note 2
4
MOD-DEF2
Module Definition 2 – Two wire serial ID interface data line (SDA)
Note 3
5
MOD-DEF1
Module Definition 1 – Two wire serial ID interface clock line (SCL)
Note 3
6
MOD-DEF0
Module Definition 0 – Grounded in module (module present indicator)
Note 3
7
No Connect
Internal pullup 30K Ω to Vcc
8
RX_LOS
Loss of Signal – High indicates loss of received optical signal
Note 4
9
No Connect
Internal pullup 30K Ω to Vcc
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
Note 6
16
VccT
Transmitter Power + 3.3 V
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
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