AFCT-57R5APZ datasheet(2/22 Pages) AVAGO

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Installation

The AFBR-57F5PZ can be installed in any SFF-8074i com-

pliant Small Form Pluggable (SFP) port regardless of host

equipment operating status. The AFBR-57F5PZ is hot-

pluggable, allowing the module 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 Elec-

tro-Static Discharge (ESD).

Digital Diagnostic Interface and Serial Identification

The 2-wire serial interface is based on ATMEL AT24C01A

series EEPROM protocol and signaling detail. Conven-

tional EEPROM memory, bytes 0-255 at memory address

0xA0, is organized in compliance with SFF-8074i. New

digital diagnostic information, bytes 0-255 at memory ad-

dress 0xA2, is compliant to SFF-8472. The new diagnostic

information provides the opportunity for Predictive Fail-

ure Identification, Compliance Prediction, Fault Isolation

and Component Monitoring.

Predictive Failure Identification

The AFBR-57F5PZ 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, maintaining

system uptime in the process. For applications where ul-

tra-high system uptime is required, a digital SFP provides

a means to monitor two real-time laser metrics associated

with observing laser degradation and predicting failure:

average laser bias current (Tx_Bias) and average laser op-

tical 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-57F5PZ devices pro-

vide real-time access to transceiver internal supply volt-

age and temperature, allowing a host to identify potential

component compliance issues. Received optical power is

also available to assess compliance of a cable plant and

remote transmitter. When operating out of requirements,

the link cannot guarantee error free transmission.

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 de-

vice, remote device or cable plant is crucial to speeding

service of an installation. AFBR-57F5PZ real-time monitors

of Tx_Bias, Tx_Power, Vcc, Temperature and Rx_Power can

be used to assess local transceiver current operating con-

ditions. In addition, status flags Tx_Disable 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 AFBR-

57F5PZ real-time monitors of Tx_Bias, Tx_Power, Vcc, Tem-

perature 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.

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