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| 型号： | AFCT-5745AUPZ |
| 元件分类： | 光收发 |
| 英文描述： | FIBER OPTIC TRANSCEIVER, 1500-1580nm, 2700Mbps(Tx), 2700Mbps(Rx), BOARD/PANEL MOUNT, LC CONNECTOR |
| 封装： | ROHS COMPLIANT PACKAGE-20 |
| 文件页数： | 11/18页 |
| 文件大小： | 518K |
| 代理商： | AFCT-5745AUPZ |
2
Functional Description
Receiver Section Design
The receiver section for the AFCT-5745Z contains an In-
GaAs/InP photo detector and a preamplifier mounted in an
optical subassembly. This optical subassembly is coupled
to a postamplifier/decision circuit on a circuit board. The
postamplifier is ac coupled to the preamplifier. The cou-
pling capacitors are chosen to pass the SONET/SDH test
pattern at 155 Mb/s, 622 Mb/s and 2.488 Gb/s without
significant distortion or performance penalty.
For multirate applications the sensitivity will meet the
maximum SONET specification for OC48 across all data-
rates (-28dBm) for 223-1 PRBS patterns as well as for dc
balanced codes, e.g. 8B/10B. For codes that have a signifi-
cantly lower frequency content, jitter and pulse distortion
could be degraded.
Loss of Signal
The Loss of Signal (LOS) output indicates that the optical
input signal to the receiver does not meet the minimum
detectable level for compliant signals. When LOS is high it
indicates loss of signal. When LOS is low it indicates normal
operation. The Loss of Signal thresholds are set to indicate
a definite optical fault has occurred (eg., disconnected or
broken fiber connection to receiver, failed transmitter).
Transmitter Section Design
A schematic diagram for the transmitter is shown in Figure
1. The AFCT-5745NPZ incorporates a 1310nm DFB laser
as its optical source, the AFCT-5745UPZ incorporates a
1550nm DFB laser as its optical source. All part numbers
have been designed to be compliant with IEC 825 and
CDRH eye safety requirements. The optical output is
controlled by a custom IC that detects the laser output
via the monitor photodiode. This IC provides both dc and
ac current drive to the laser to ensure correct modulation,
eye diagram and extinction ratio over temperature, supply
voltage and operating life.
TX_FAULT
The AFCT-5745Z modules feature a transmit fault control
signal output which when high indicates a laser transmit
fault has occurred and when low indicates normal laser
operation. A transmitter fault condition can be caused
by deviations from the recommended module operating
conditions or by violation of eye safety conditions. A fault
is cleared by cycling the TX_DISABLE control input.
TX_DISABLE
The AFCT-5745Z accepts a transmit disable control signal
input which shuts down the transmitter. A high signal
implements this function while a low signal allows normal
laser operation. In the event of a fault (eg., eye safety circuit
activated), cycling this control signal resets the module.
The TX_DISABLE control should be actuated upon initial-
ization of the module.
Digital Diagnostic Interface and Serial Identification
(EEPROM)
The AFCT-5745Z complies with both SFF-8074i (SFP) and
SFF-8472 (Digital Diagnostic SFP) specifications available
from the SFF Committee at http://www.sffcommittee.
org. The AFCT-5745Z adds digital diagnostic monitoring
to standard SFP functionality, enabling failure prediction,
fault islolation, and component monitoring capabilities.
The transceiver continues to use the 2-wire I2C compatible
serial interface. Standard SFP EEPROM bytes 0-255 are ad-
dressed per SFF-8074i at memory address 0xA0 (A0h). New
digital diagnostic information is accessed per SFF-8472 us-
ing EEPROM bytes 0-255 at memory address 0xA2 (A2h).
The AFCT-5745Z provides real time access to transceiver in-
ternal supply voltage and temperature, transmitter output
power, laser bias current and receiver average input power,
allowing a host to predict system compliance issues.
These 5 parameters are reported “internally” calibrated as
described in SFF-8472.
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相关代理商/技术参数 |
参数描述 |
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| AFCT-5745PZ | 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: |
| AFCT-5745TPZ | 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: |
| AFCT-5750ALZ | 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: |
| AFCT-5750APZ | 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: |
| AFCT-5750ATLZ | 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: |
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