Finisar Corporation April 2012 Rev.C. Confidential Page 1
Product Specification
Multi-rate CWDM Pluggable SFP Transceiver
FWLF1521P2Nxx
PRODUCT FEATURES
Up to 2.67 Gb/s bi-directional
data links
Hot-pluggable SFP footprint
Built-in digital diagnostic
functions
Uncooled DFB laser transmitter in
8 possible CWDM wavelengths
Duplex LC connector
Very low jitter
Metal enclosure, for lower EMI
Single 3.3V power supply
Low power dissipation
Operating temperature range:
-10°C to 85°C
APPLICATIONS
Metro Access Rings and Point-to-
Point networking for SONET, Gigabit
Ethernet and Fibre Channel
High temperature environments
Finisar’s FWLF1521P2Nxx CWDM Small Form Factor Pluggable (SFP) transceivers are
designed for operation in Metro Access Rings and Point-to-Point networks using
SONET1,Gigabit Ethernet2 and Fibre Channel3 networking equipment. They are available
in eight different CWDM wavelengths and comply with ITU CWDM standard4. Digital
diagnostics functions can be accessed via an I2C serial bus. In addition, the transceivers
comply with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA)5 are
RoHS and lead free compliant per Directive 2002/95/EC6 and Finisar Application Note
AN-20387.
PRODUCT SELECTION
Wavelength
xx
Clasp Color
Code
Wavelength
xx
Clasp Color
Code
1471 nm
47
Gray
1551 nm
55
Yellow
1491 nm
49
Violet
1571 nm
57
Orange
1511 nm
51
Blue
1591 nm
59
Red
1531 nm
53
Green
1611 nm
61
Brown
FWLF1521P2Nxx SFP Product Specification – April 2012 F i n i s a r
Finisar Corporation April 2012 Rev.C. Confidential Page 2
I. Pin Descriptions
Pin
Symbol
Ref.
1
VEET
1
2
TFAULT
3
TDIS
2
4
MOD_DEF(2)
3
5
MOD_DEF(1)
3
6
MOD_DEF(0)
3
7
Rate Select
4
8
LOS
5
9
VEER
1
10
VEER
1
11
VEER
1
12
RD-
13
RD+
14
VEER
1
15
VCCR
16
VCCT
17
VEET
1
18
TD+
19
TD-
20
VEET
1
Notes:
1. Circuit ground is internally isolated from chassis ground.
2. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.
3. Should be pulled up with 4.7k – 10kohms on host board to a voltage between 2.0V and 5.5V.
MOD_DEF(0) pulls line low to indicate module is plugged in.
4. Finisar 2x receiver achieves simultaneous 1x and 2x operation without active control.
5. LOS is open collector output. Should be pulled up with 4.7k – 10kohms on host board to a voltage
between 2.0V and 5.5V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.
VeeT
VeeT
VeeR
VeeR
TD-
TD+
RD+
RD-
VccT
VccR
VeeT
VeeR
TXFault
MOD-DEF(2)
MOD-DEF(1)
MOD-DEF(0)
Rate Select
LOS
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Towards
ASIC
Towards
Bezel
TX Disable
VeeR
Diagram of Host Board Connector Block Pin Numbers and Names
FWLF1521P2Nxx SFP Product Specification – April 2012 F i n i s a r
Finisar Corporation April 2012 Rev.C. Confidential Page 3
II. Absolute Maximum Ratings
Parameter
Symbol
Min
Typ
Max
Unit
Ref.
Maximum Supply Voltage
Vcc
-0.5
4.0
V
Storage Temperature
TS
-40
85
C
Case Operating Temperature
TOP
-10
85
C
III. Electrical Characteristics (TOP = -10 to 85 C, VCC = 3.11 to 3.5 Volts)
Parameter
Symbol
Min
Typ
Max
Unit
Ref.
Supply Voltage
Vcc
3.1
3.5
V
Supply Current
Icc
200
350
mA
Transmitter
Input differential impedance
Rin
100
1
Differential data input swing
Vin,pp
500
1600
mV
Transmit Disable Voltage
VD
Vcc – 1.3
Vcc
V
Transmit Enable Voltage
VEN
Vee
Vee+ 0.8
V
2
Transmit Disable Assert Time
10
us
Receiver
Single ended data output swing
Vout,pp
250
470
mV
3
Data output rise time
tr
100
175
ps
4
Data output fall time
tf
100
175
ps
4
LOS Fault
VLOS fault
Vcc – 0.5
VccHOST
V
5
LOS Normal
VLOS norm
Vee
Vee+0.5
V
5
Power Supply Rejection
PSR
100
mVpp
6
Notes:
1. Connected directly to TX data input pins. AC coupled thereafter.
2. Or open circuit.
3. Into 100 ohms differential termination.
4. 20% to 80 %
5. Loss Of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
6. Receiver sensitivity is compliant with power supply sinusoidal modulation of 20 Hz to 2.0 MHz up to
specified value applied through the recommended power supply filtering network.
FWLF1521P2Nxx SFP Product Specification – April 2012 F i n i s a r
Finisar Corporation April 2012 Rev.C. Confidential Page 4
IV. Low Speed Signals
Parameter
Symbol
Min
Typ
Max
Units
Notes/Conditions
RX_LOS Assert Level
-30
dBm
RX_LOS Deassert Level
-19
dBm
RX_LOS Hysteresis
0.5
2
dB
RX_LOS Assert Delay
t_loss_on
100
sec
From detection of loss of signal
to assertion of RX_LOS
RX_LOS Negate Delay
t_loss_off
100
sec
From detection of presence of
signal to negation of RX_LOS
TX_DISABLE Assert Time
t_off
10
sec
Rising edge of TX_DISABLE to
fall of output signal below 10%
of nominal
TX_DISABLE Negate Time
t_on
1000
sec
Falling edge of TX_DISABLE
to rise of output signal above
90% of nominal. Time
indicated is under steady-state
temperature conditions.
TX_DISABLE Reset Time
t_reset
10
sec
TX_DISABLE HIGH before
TX_DISABLE set LOW
TX_FAULT Assert
100
sec
From fault to assertion of
TX_FAULT
Initialization Time
300
msec
From power on to negation of
TX_FAULT using
TX_DISABLE
FWLF1521P2Nxx SFP Product Specification – April 2012 F i n i s a r
Finisar Corporation April 2012 Rev.C. Confidential Page 5
V. Optical Characteristics (TOP = -10 to 85 C, VCC = 3.1 to 3.5 Volts)
Parameter
Symbol
Min
Typ
Max
Unit
Ref.
Transmitter
Output Opt. Pwr (EOL)
POUT
0
+5
dBm
2
Optical Wavelength
(X-6.5)
X
(X+6.5)
nm
3
Wavelength Temperature Dependence
0.08
0.125
nm/°C
Spectral Width
1
nm
4
Optical Extinction Ratio
ER
8.2
dB
5
Sidemode Suppression Ratio
SMSRmin
30
dB
Optical Rise/Fall Time
tr/ tf
180
ps
6
RIN
RIN
-120
dB/Hz
Transmitter Jitter Generation
75
mUI
7
Dispersion Penalty at 50 km
2
dB
8
Optical Return Loss
24
dB
Receiver
Optical Input Power
Pin
-20
-3
dBm
9
Optical Input Wavelength
C
1450
1620
nm
Receiver Jitter Generation
75
mUI
7
Optical Return Loss
27
dB
Notes:
1. Parameters are specified over temperature and voltage, at end of life unless otherwise noted.
2. Class 1 Laser Safety per FDA/CDRH and IEC-825-1 regulations.
3. Over case temperature of -10 to 85 °C. The Transmitter Center Wavelength “X” is as specified by the
customer. The current available wavelengths are: 1471, 1491, 1511, 1531, 1551, 1571, 1591, and 1611
nm. Please see the “Product Selection” section on page 1.
4. Full width, -20dB from peak.
5. Measured filtered, at 2.488 Gb/s. Min represents worst-case ER over temperature and at end of life.
6. Unfiltered, 20% to 80%.
7. Measured per GR-2532 section 5.6 for OC-48 B.
8. SMF-28 fiber used. 50kms represents 1000ps/nm at 1610nm. Measured at 2.488Gb/s with a PRBS
223-1 pattern at a BER<10-12.
9. Pin represents the range of input powers where BER<10-12. Pin is valid over all data rates specified in
Section VI.
FWLF1521P2Nxx SFP Product Specification – April 2012 F i n i s a r
Finisar Corporation April 2012 Rev.C. Confidential Page 6
VI. General Specifications
Parameter
Symbol
Min
Typ
Max
Units
Ref.
Data Rate
BR
0.155*
2.67
Gb/sec
*OC-3/12 compatible. Not
compliant w/ all OC-3/12
specifications, such as min ER
.(OC-48 compliance takes
precedence)
Total Link Budget
--
20
22
dB
2.488 Gb/s, BER < 10-12
w/ PRBS 223-1. Does not
include dispersion penalty
VII. Environmental Specifications
Parameter
Symbol
Min
Typ
Max
Units
Ref.
Case Operating Temperature
Top
-10
85
°C
Storage Temperature
Tsto
-40
85
°C
VIII. Regulatory Compliance
Finisar CWDM SFP transceivers are Class 1 Laser Products. They are certified per the
following standards:
Feature
Agency
Standard
Laser Eye Safety
FDA/CDRH
CDRH and IEC-825
Class 1 Laser Product.
See Note 1
Laser Eye Safety
TÜV
EN 60950
EN 60825-1
EN 60825-2
Electrical Safety
CSA
CLASS 3862.07
CLASS 3862.87
Note 1: Complies with FDA performance standards for laser products except for deviations pursuant to
Laser Notice No. 50, dated July 26, 2001.
FWLF1521P2Nxx SFP Product Specification – April 2012 F i n i s a r
Finisar Corporation April 2012 Rev.C. Confidential Page 7
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.”8
Finisar’s CWDM SFPs also support extended diagnostic features as described in Finisar
Applications Note AN-2030, “Digital Diagnostic Monitoring Interface for Optical
Transceivers”9, and additional information is available in SFF standard titled: “Digital
Diagnostic Monitoring Interface for Optical Transceivers10 (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
I2C Clock Speed
0
100,000
Hz
Bus can be driven blind
Accuracy
Transceiver Temperature
DDTemperatu
re
-3
+3
°C
Measured at controller IC
Transceiver Supply
Voltage
DDVoltage
-3
+3
%
Measured at controller IC
Tx Bias Curent
DDBias
-10
+10
%
Tx Output Power
DDTxPower
-3
+3
dB
100% tested in production
tested at room temp to 2 dB
Received Average Power
DDRxPower
-3
+3
dB
100% tested in production
tested at room temp to 2 dB
Range
Transceiver Temperature
DDTemperatu
re
-40
85
°C
Transceiver Supply
Voltage
DDVoltage
3.0
4.0
V
Tx Bias Curent
DDBias
0
90
mA
Tx Output Power
DDTxPower
-10
5
dBm
Received Average Power
DDRxPower
-23
0
dBm
FWLF1521P2Nxx SFP Product Specification – April 2012 F i n i s a r
Finisar Corporation April 2012 Rev.C. Confidential Page 8
X. Mechanical Specifications
Finisar’s Multi-rate CWDM Small Form Factor Pluggable (SFP) transceivers are
compatible with the dimensions defined by the SFP Multi-Sourcing Agreement (MSA).
FWLF1521P2Nxx Outline Drawing - units in inches [mm]
FWLF1521P2Nxx SFP Product Specification – April 2012 F i n i s a r
Finisar Corporation April 2012 Rev.C. Confidential Page 9
XI. PCB Layout and Bezel Recommendations
FWLF1521P2Nxx SFP Product Specification – April 2012 F i n i s a r
Finisar Corporation April 2012 Rev.C. Confidential Page 10
FWLF1521P2Nxx SFP Product Specification – April 2012 F i n i s a r
Finisar Corporation April 2012 Rev.C. Confidential Page 11
XII. References
1. “SONET Transport Systems: Common Generic Criteria”, Telcordia Technologies,
GR-253-CORE, Issue 3, Sept 2000.
2. IEEE Std 802.3. IEEE Standards Department, 2000.(*)
3. “Fibre Channel Draft Physical Interface Specification (FC-PI 10.0)”. American
National Standard for Information Systems.(*)
4. “Optical Interfaces for Course Wavelength Division Multiplexing Applications”,
ITU-T recommendation G.695, January 2005.
5. Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA),
September 2000. Documentation is currently available at Finisar upon request.
6. Directive 2002/95/EC of the European Council Parliament and of the Council, “on
the restriction of the use of certain hazardous substances in electrical and electronic
equipment”. January 27, 2003.
7. “Application Note AN-2038: Finisar Implementation Of RoHS Compliant
Transceivers”, Finisar Corporation, January 21, 2005.
8. “AT24C01A/02/04/08/16 2-Wire Serial CMOS E2PROM”, Atmel Corporation.
www.Atmel.com
9. “Application Note AN-2030: Digital Diagnostic Monitoring Interface for Optical
Transceivers”, Finisar Corporation, April 2002.
10. “Digital Diagnostic Monitoring Interface For Optical Transceivers Rev 9.3”. SFF
Document No. SFF-8472.
(*) Neither IEEE 802.3 nor FC-PI 10.0 specifies a 1621 nm DFB single mode interface.
The FWLF1521P2Nxx complies with these specifications except for the following
optical parameters, which have different values: transmitter wavelength, extinction ratio,
receiver sensitivity, and transmit output power. See Section V for details.
For More Information
Finisar Corporation
1308 Moffett Park Drive
Sunnyvale, CA 94089-1133
Tel. 1-408-548-1000
Fax 1-408-541-6138
sales@finisar.com
www.finisar.com
FWLF1521P2Nxx SFP Product Specification – April 2012 F i n i s a r
Finisar Corporation April 2012 Rev.C. Confidential Page 12
Revision History
Revision
Date
Description
A
1-29-2008
Document created with 2dB DP
3-13-2008
Receiver max input power modified to -3dBm; wavelength ranges
corrected to reflect CWDM standards.
B
11-05-2008
Official release