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參數(shù)資料
| 型號： | AFCT-57V6USZ |
| 元件分類： | 光收發(fā) |
| 英文描述： | FIBER OPTIC TRANSCEIVER, 1270-1600nm, 1250Mbps(Tx), 1250Mbps(Rx), BOARD/PANEL MOUNT, LC CONNECTOR |
| 封裝： | ROHS COMPLIANT, DIP-20 |
| 文件頁數(shù)： | 20/22頁 |
| 文件大小： | 508K |
| 代理商： | AFCT-57V6USZ |
7
PinDefinitions
VeeT Transmitter Ground. VeeT and VeeR are internally con-
nected within the AFCT-57V6USZ module.
VeeR Receiver Ground. VeeT and VeeR are internally con-
nected within the AFCT-57V6USZ module.
VccT Transmitter +3.3 V Power Supply. VccT and VccR are
internally connected within the AFCT-57V6USZ module.
VccR Receiver +3.3V Power Supply. VccT and VccR are
internally connected within the AFCT-57V6USZ module.
TD+/TD- Transmit Data In and Inverted Transmit Data In
are differential input to the transmitter. They are internally
AC-coupled into an equivalent load of RI differential, as
shown in Figure 13.
TX_DISABLE Active high TTL input, with internal 9.4k ohm
pull-up resistor to Vcc.
Asserting the transmitter disable will deactivate the laser
within the assert time. The truth table shown describes
the state of the module, and Table 11 indicates the timing
of TX_DISABLE.
RD+/RD- Received Data Out and Inverted Received Data
Out are differential serial output from the receiver. These
are AC-coupled 100 ohm differential lines which should
be terminated with a 100 ohm (differential) at the user
SERDES, as shown in Figure 13. AC coupling is done inside
the module and is thus not required on the host board.
RX_LOS Active high open collector/drain output which
indicates a loss-of-signal condition (LOS). When the aver-
age optical power received by the module is below the
Assert Level, RX_LOS is indicated according to the truth
table below, and Table 11 indicates the timing of RX_LOS.
RX_LOS requires a 4.7k-10k ohm pull-up resistor external
to the module, i.e., in the host system Host_Vcc, as shown
in Figure 13. The pull-up voltage is between 2.0 V and
VccR(VccT) + 0.3 V.
RATE_SELECT Not Connected.
TX_FAULT Active high open collector/drain output which
indicates a fault in the module.
This can be (1) failure of the laser driver or (2) end-of-life
of the laser. Under these conditions, the laser will be de-
activated within the assert time. TX_FAULT also requires a
4.7k-10k ohm pull-up resistor external to the module, i.e.
in the host system Host_Vcc, as shown in Figure 13. The
pull-up voltage is between 2.0 V and VccT(VccR) + 0.3 V.
Conditions (1) and (2) are latched, and for diagnostic pur-
poses only, may be reset by toggling TX_DISABLE high for
at least t_reset. See Table 11 and Figure 8.
MOD_DEF[0:2] The AFCT-57V6USZ has a serial ID func-
tion which provides information about the transceiver’s
capabilities, standard interfaces, manufacturer and other
information, and has a digital diagnostic monitoring
function, per SFF-8472 [3], which allows monitoring op-
erating temperature, supply voltage, laser bias current,
transmitter optical output power and optical received
power in real time. These functions are provided via a two
wire serial EEPROM interface.
MOD_DEF[0] is connected to ground inside the module.
MOD_DEF[1] is the serial clock signal input. MOD_DEF[2]
is the data output/input.
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