參數(shù)資料
型號(hào)： AFCT-57M5ATPZ
元件分類： 光發(fā)射
英文描述： FIBER OPTIC TRANSMITTER, 1280-1345nm, 1593Mbps, LC CONNECTOR
封裝： PLASTIC
文件頁(yè)數(shù)： 14/20頁(yè)
文件大?。?/td> 402K
代理商： AFCT-57M5ATPZ
3
Figure1.Transceiverfunctionaldiagram.
TransmitterSection
The transmitter section includes a 30-nm Fabry Perot
(FP) laser and a transmitter driver circuit.The driver circuit
maintains a constant average optical power output with
Fibre Channel and Ethernet 8B/0B coded data. Optical
connection to the transmitter is provided via an LC con-
nector. 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/0B code,
for example).
TransmitDisable(TX_DISABLE)
The AFCT-57M5ATPZ accepts a TTL and CMOS compat-
ible 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 nor-
mal 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 0
ms interval between successive assertions of this control
signal. Tx_Disable can also be asserted via the two-wire
serialinterface(addressA2h,byte0,bit6)andmonitored
(address A2h, byte 0, bit 7).
The contents of A2h, byte 0, bit 6 are logic OR’d with
hardware Tx_Disable (pin 3) to control transmitter opera-
tion
TransmitFault(TX_FAULT)
A catastrophic laser fault will activate the transmitter sig-
nal, 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 0, bit 2).
EyeSafetyCircuit
TheAFCT-57M5ATPZprovidesClass(singlefaulttolerant)
eye safety by design and has been tested for compliance
with the requirements listed in Table . The eye safety
circuit continuously monitors the optical output power
level and will disable the transmitter upon detecting an
unsafeconditionbeyondthescopeofClasscertification.
Such unsafe conditions can be due to inputs from the host
board (Vcc fluctuation, unbalanced code) or a fault within
the transceiver.
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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參數(shù)描述
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AFCT-57R5ATPZ 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(zhǎng):850 nm 最大工作溫度: 最小工作溫度: 封裝 / 箱體: 封裝:
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