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AFBR-703SNZ Datasheet(PDF) 2 Page - AVAGO TECHNOLOGIES LIMITED |
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AFBR-703SNZ Datasheet(HTML) 2 Page - AVAGO TECHNOLOGIES LIMITED |
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2 / 19 page  2 Installation The AFBR-703SNZ transceiver package is compliant with the SFF 8432 Improved Pluggable Formfactor housing specification for the SFP+. It can be installed in any INF- 8074 or SFF-8431/2 compliant Small Form Pluggable (SFP) port regardless of host equipment operating status The AFBR-703SNZ is hot-pluggable, allowing the mod- ule to be installed while the host system is operating and on-line. Upon insertion, the transceiver housing makes initial contact with the host board SFP cage, mitigating potential damage due to Electro-Static Discharge (ESD). Digital Diagnostic Interface and Serial Identification The two-wire interface protocol and signaling detail are based on SFF-8431. Conventional EEPROM memo- ry, bytes 0-255 at memory address 0xA0, is organized in compliance with SFF-8431. New digital diagnostic information, bytes 0-255 at memory address 0xA2, is compliant to SFF-8472. The new diagnostic information provides the opportunity for Predictive Failure Identifi- cation, Compliance Prediction, Fault Isolation and Com- ponent Monitoring. Predictive Failure Identification The AFBR-703SNZ predictive failure feature allows a host to identify potential link problems before system perfor- mance is impacted. Prior identification of link problems enables a host to service an application via “fail over” to a redundant link or replace a suspect device, main- taining system uptime in the process. For applications where ultra-high system uptime is required, a digital SFP provides a means to monitor two real-time laser metrics associated with observing laser degradation and pre- dicting failure: average laser bias current (Tx_Bias) and average laser optical power (Tx_Power). Compliance Prediction Compliance prediction is the ability to determine if an optical transceiver is operating within its operating and environmental requirements. AFBR-703SNZ devices provide real-time access to transceiver internal supply voltage and temperature, allowing a host to identify po- tential component compliance issues. Received optical power is also available to assess compliance of a cable plant and remote transmitter. When operating out of re- quirements, the link cannot guarantee error free trans- mission. Fault Isolation The fault isolation feature allows a host to quickly pin- point the location of a link failure, minimizing downtime. For optical links, the ability to identify a fault at a local device, remote device or cable plant is crucial to speed- ing service of an installation. AFBR-703SNZ real-time monitors of Tx_Bias, Tx_Power, Vcc, Temperature and Rx_Power can be used to assess local transceiver current operating conditions. In addition, status flags TX_DIS- ABLE and Rx Loss of Signal (LOS) are mirrored in memory and available via the two-wire serial interface. Component Monitoring Component evaluation is a more casual use of the AF- BR-703SNZ real-time monitors of Tx_Bias, Tx_Power, Vcc, Temperature and Rx_Power. Potential uses are as debugging aids for system installation and design, and transceiver parametric evaluation for factory or field qualification. For example, temperature per module can be observed in high density applications to facilitate thermal evaluation of blades, PCI cards and systems. Description, continued |
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