參數(shù)資料
型號(hào)： AFCT-57R5ATPZ
元件分類： 光收發(fā)
英文描述： FIBER OPTIC TRANSCEIVER, 1290-1340nm, 4250Mbps(Tx), 4250Mbps(Rx), BOARD/PANEL MOUNT, LC CONNECTOR
封裝： ROHS COMPLIANT PACKAGE-20
文件頁數(shù)： 14/20頁
文件大小： 246K
代理商： AFCT-57R5ATPZ
3
Figure 1. Transceiver functional diagram.
Transmitter Section
The transmitter section includes
a 1310-nm distributed feedback
(DFB) laser and a transmitter
driver circuit. The driver circuit
maintains a constant average
optical power output with Fibre
Channel and Ethernet 8B/10B
coded data. Optical connection
to the transmitter is provided
via an LC connector. The TOSA
is driven by a custom IC which
uses the incoming differential
high speed logic signal to
modulate the laser diode driver
current. This Tx laser driver
circuit regulates the optical
power at a constant level
provided the incoming data
pattern is dc balanced (8B/10B
code, for example).
Transmit Disable (TX_DISABLE)
The AFCT-57R5ATPZ accepts a
TTL and CMOS compatible
transmit disable control signal
input (pin 3) which shuts down
the transmitter optical output. A
high signal implements this
function while a low signal
allows normal transceiver
operation. In the event of a fault
(e.g. eye safety circuit activated),
cycling this control signal resets
the module as depicted in Figure
4. An internal pull up resistor
disables the transceiver
transmitter until the host pulls
the input low. Host systems
should allow a 10 ms interval
between successive assertions of
this control signal. Tx_Disable
can also be asserted via the two-
wire serial interface (address
A2h, byte 110, bit 6) and
monitored (address A2h, byte
110, bit 7).
The contents of A2h, byte 110,
bit 6 are logic OR’d with
hardware Tx_Disable (pin 3) to
control transmitter operation
Transmit Fault (TX_FAULT)
A catastrophic laser fault will
activate the transmitter signal,
TX_FAULT, and disable the
laser. This signal is an open
collector output (pull-up
required on the host board). A
low signal indicates normal laser
operation and a high signal
indicates a fault. The TX_FAULT
will be latched high when a laser
fault occurs and is cleared by
toggling the TX_DISABLE input
or power cycling the transceiver.
The transmitter fault condition
can also be monitored via the
two-wire serial interface
(address A2, byte 110, bit 2).
Eye Safety Circuit
The AFCT-57R5ATPZ provides
Class 1 (single fault tolerant) eye
safety by design and has been
tested for compliance with the
requirements listed in Table 1.
The eye safety circuit
continuously monitors the
optical output power level and
will disable the transmitter upon
detecting an unsafe condition
beyond the scope of Class 1
certification. Such unsafe
conditions can be due to inputs
from the host board (Vcc
LIGHT FROM FIBER
LIGHT TO FIBER
PHOTO-DETECTOR
RECEIVER
AMPLIFICATION
& QUANTIZATION
RD+ (RECEIVE DATA)
RD– (RECEIVE DATA)
Rx LOSS OF SIGNAL
VCSEL
TRANSMITTER
LASER
DRIVER &
SAFETY
CIRCUITRY
TX_DISABLE
TD+ (TRANSMIT DATA)
TD– (TRANSMIT DATA)
TX_FAULT
ELECTRICAL INTERFACE
MOD-DEF2 (SDA)
MOD-DEF1 (SCL)
MOD-DEF0
CONTROLLER & MEMORY
OPTICAL INTERFACE
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AFCT-57V6ANSZ 功能描述:光纖發(fā)射器、接收器、收發(fā)器 Transceiver RoHS:否 制造商:Omron Electronics 產(chǎn)品:Transmitters 數(shù)據(jù)速率:3.5 Gbps 波長:850 nm 最大工作溫度: 最小工作溫度: 封裝 / 箱體: 封裝:
AFCT-57V6AUSZ 功能描述:光纖發(fā)射器、接收器、收發(fā)器 Transceiver RoHS:否 制造商:Omron Electronics 產(chǎn)品:Transmitters 數(shù)據(jù)速率:3.5 Gbps 波長:850 nm 最大工作溫度: 最小工作溫度: 封裝 / 箱體: 封裝:
AFCT-57V6NSZ 功能描述:光纖發(fā)射器、接收器、收發(fā)器 Transceiver RoHS:否 制造商:Omron Electronics 產(chǎn)品:Transmitters 數(shù)據(jù)速率:3.5 Gbps 波長:850 nm 最大工作溫度: 最小工作溫度: 封裝 / 箱體: 封裝:
AFCT-57V6USZ 功能描述:光纖發(fā)射器、接收器、收發(fā)器 Transceiver RoHS:否 制造商:Omron Electronics 產(chǎn)品:Transmitters 數(shù)據(jù)速率:3.5 Gbps 波長:850 nm 最大工作溫度: 最小工作溫度: 封裝 / 箱體: 封裝:
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