FWDM-1621-7D-47 Datasheet, PDF (7/11 Pages) Finisar Corporation. – Multi-rate CWDM Pluggable SFP Transceiver

FWDM-1621-7D-xx SFP Product Specification – September 2005
IX. Digital Diagnostic Functions
All Finisar SFPs support the 2-wire serial communication protocol outlined in the SFP
MSA⁵. These SFPs use an Atmel AT24C01A 128 byte E²PROM with an address of A0h
(see table below for E²PROM contents). For details on interfacing with the E²PROM, see
the Atmel data sheet titled “AT24C01A/02/04/08/16 2-Wire Serial CMOS E²PROM.”⁶
Finisar’s CWDM SFPs also support extended diagnostic features as described in Finisar
Applications Note AN-2030, “Digital Diagnostic Monitoring Interface for Optical
Transceivers”⁷, and additional information is available in SFF standard titled: “Digital
Diagnostic Monitoring Interface for Optical Transceivers⁸ (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
I²C Clock Speed
Accuracy
Internal Transceiver
Temperature
Internal Transceiver
Supply Voltage
Tx Bias Curent
Tx Output Power
Received Average
Power
Range
Internal Transceiver
Temperature
Internal Transceiver
Supply Voltage
Tx Bias Curent
Tx Output Power
Received Average
Power
Symbol Min Typ Max Units Notes/Conditions
0
100,000 Hz Bus can be driven blind
DD_Temperature -3
DD_Voltage
-3
DD_Bias
-10
DD_TxPower
-3
DD_RxPower
-3
+3
°C Measured at controller IC
+3
% Measured at controller IC
+10
%
+3
dB 100% tested in production
tested at room temp to ±2 dB
+3
dB 100% tested in production
tested at room temp to ±2 dB
DD_Temperature -40
DD_Voltage
3.0
DD_Bias
0
DD_TxPower
-10
DD_RxPower
-30
85
°C
4.0
V
90
mA
5
dBm
-7
dBm
© Finisar Corporation September 2005 Rev. F
Page 7