FWLF1521P2Nxx SFP Product Specification – April 2012

F i n i s a r

 Finisar Corporation April 2012 Rev.C1.

Page 7

IX.

Digital Diagnostic Functions

All Finisar SFPs support the 2-wire serial communication protocol outlined in the SFP

MSA

(see table below for E

Finisar’s CWDM SFPs also support extended diagnostic features as described in Finisar

Applications Note AN-2030, “Digital Diagnostic Monitoring Interface for Optical

Diagnostic Monitoring Interface for Optical Transceivers

10

(SFF-8472 rev9.3). A

controller IC that monitors system parameters such as laser current, module temperature,

transmitter power, and received power is accessible at address A2H.

I2C 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.

Parameter

Symbol

Min

Typ

Max

Units Notes/Conditions

I

0

100,000

Hz

Bus can be driven blind

Accuracy

Transceiver Temperature

re

-3

+3

°C

Measured at controller IC

Transceiver Supply

Voltage

-3

+3

%

Measured at controller IC

Tx Bias Curent

-10

+10

%

Tx Output Power

-3

+3

dB

100% tested in production

tested at room temp to 2 dB

Received Average Power

-3

+3

dB

100% tested in production

tested at room temp to 2 dB

Range

Transceiver Temperature

re

-40

85

°C

Transceiver Supply

Voltage

3.0

4.0

V

Tx Bias Curent

0

90

mA

Tx Output Power

-10

5

dBm

Received Average Power

-23

0

dBm