FWLF1632xx Product Specification
Finisar Corporation - August 2015 Rev B1 Page 8
IX. Serial Communication Protocol
Finisar SFPs support diagnostic features as described in Finisar Applications Note AN-
2030
4
and SFF-8472
7
, “Digital Diagnostic Monitoring Interface for Optical Transceivers”.
A controller IC that monitors system parameters such as laser current, module
temperature, transmitter power, and received power is accessible at address A2h. In
addition, Finisar’s DWDM SFPs provide extended set of ID information and diagnostic
features as described in the DWDM SFP MSA
6
.
2-wire serial communication clock speed, digital diagnostic accuracy and digital
diagnostic range can be found in the table below. Values in the table represent the worst-
case values over temperature, voltage, and life.
2-wire serial communication
clock speed
0 100,000 Hz Bus can be driven blind
Transceiver Case Temperature DD
Temperature
-10 +10 °C
Measured on the top-side of
the module case
Transceiver Supply Voltage
Transceiver Case Temperature
Transceiver Supply Voltage