FWLF1631 Datasheet, PDF (8/10 Pages) Finisar Corporation. – DWDM SFP Transceiver

FWLF-1631-xx DWDM SFP – June 2009
IX. Serial Communication Protocol
Finisar
All Finisar SFPs support the 2-wire serial communication protocol to provide module ID
information as outlined in the SFP MSA¹. These SFPs use an Atmel AT24C01A 128 byte
E²PROM with an address of A0h. For details on interfacing with the E²PROM, see the
Atmel data sheet titled “AT24C01A/02/04/08/16 2-Wire Serial CMOS E²PROM.”⁷
Finisar SFPs also support diagnostic features as described in Finisar Applications Note
AN-2030⁴ and SFF-8472⁸, “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 MSA⁶.
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
I²C Clock Speed
Accuracy
Transceiver Case
Temperature
Transceiver Supply
Voltage
Tx Bias Current
Tx Output Power
Received Average
Power
Range
Transceiver Case
Temperature
Transceiver Supply
Voltage
Tx Bias Current
Tx Output Power
Received Average
Power
Symbol Min Typ Max Units Notes/Conditions
0
100,000 Hz Bus can be driven blind
DD_Temperature -10
DD_Voltage
-3
DD_Bias
-10
DD_TxPower
-2
DD_RxPower
-2
+10
°C Measured on the top-side of
the module case
+3
%
+10
%
+2
dB
+2
dB
DD_Temperature -40
DD_Voltage
3.0
DD_Bias
0
DD_TxPower
-5
DD_RxPower
-30
85
°C
4.0
V
90
mA
+10 dBm
-7
dBm
© Finisar Corporation
Page 8 June 2009 Rev E2