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参数资料
| 型号： | AFBR-57R5AEZ |
| 元件分类： | 光收发 |
| 英文描述： | FIBER OPTIC TRANSCEIVER, 830-860nm, 4250Mbps(Tx), 4250Mbps(Rx), BOARD/PANEL MOUNT, LC CONNECTOR |
| 封装： | ROHS COMPLIANT PACKAGE-10 |
| 文件页数： | 14/20页 |
| 文件大小： | 479K |
| 代理商： | AFBR-57R5AEZ |
3
Figure1.Transceiverfunctionaldiagram.
TransmitterSection
The transmitter section consists of the Transmitter Optical
SubAssembly (TOSA) and laser driver circuitry. The TOSA,
containing an 850 nm VCSEL (Vertical Cavity Surface
Emitting Laser) light source, is located at the optical
interface and mates with the LC optical 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).
TransmitDisable(Tx_Disable)
The AFBR-57R5AEZ 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
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.
TransmitFault(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).
EyeSafetyCircuit
The AFBR-57R5AEZ 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 certifica-
tion. 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| AFBR-57R5AP | 功能描述:光纤发射器、接收器、收发器 Transceiver RoHS:否 制造商:Omron Electronics 产品:Transmitters 数据速率:3.5 Gbps 波长:850 nm 最大工作温度: 最小工作温度: 封装 / 箱体: 封装: |
| AFBR-57R5APZ | 功能描述:光纤发射器、接收器、收发器 Transceiver RoHS:否 制造商:Omron Electronics 产品:Transmitters 数据速率:3.5 Gbps 波长:850 nm 最大工作温度: 最小工作温度: 封装 / 箱体: 封装: |
| AFBR-57R5APZ-AN1 | 制造商:Avago Technologies 功能描述:MM 4/2/1 SFP DMI , ROHS, ANUE - Bulk |
| AFBR-57R5APZ-TD1 | 制造商:Avago Technologies 功能描述:MM 4/2/1 SFP DMI, ROHS, TERADATA - Trays |
| AFBR-57R5APZ-TE1 | 制造商:Avago Technologies 功能描述:4G XCVR, SFP, ROHS COMPLIANT - Trays |
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