Finisar
Product Specification
Multi-rate CWDM Pluggable SFP Transceiver
FWLF1621P2Txx
PRODUCT FEATURES
Up to 2.67 Gb/s bi-directional
data links
Hot-pluggable SFP footprint
Built-in digital diagnostic
functions
Cooled 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:
-40°C to 85°C
APPLICATIONS
Metro Access Rings and Point-to-
Point networking for SONET, Gigabit
Ethernet and Fibre Channel
Outside plant and industrial
communication networks
Finisar’s FWLF1621P2Txx CWDM Small Form Factor Pluggable (SFP) transceivers are
designed for operation in Metro Access Rings and Point-to-Point networks using
SONET
1
, Gigabit Ethernet
2
and Fibre Channel
3
networking equipment in environments
where temperatures are not controlled. They are available in eight different CWDM
wavelengths and comply with ITU CWDM standard
4
. Digital diagnostics functions can
be accessed via an I
2
C 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/EC
6
and Finisar Application Note AN-2038
7
.
PRODUCT SELECTION
Clasp Color
Wavelength xx
Code
1471 nm
47
Gray
1491 nm
49
Violet
1511 nm
51
Blue
1531 nm
53
Green
Finisar Corporation April 2012 Rev.C
Wavelength
1551 nm
1571 nm
1591 nm
1611 nm
xx
55
57
59
61
Clasp Color
Code
Yellow
Orange
Red
Brown
Page 1
FWLF1621P2Txx SFP Product Specification – April 2012
Finisar
I.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin Descriptions
Symbol
V
EET
T
FAULT
T
DIS
MOD_DEF(2)
MOD_DEF(1)
MOD_DEF(0)
Rate Select
LOS
V
EER
V
EER
V
EER
RD-
RD+
V
EER
V
CCR
V
CCT
V
EET
TD+
TD-
V
EET
Name/Description
Transmitter Ground (Common with Receiver Ground)
Transmitter Fault. Not supported.
Transmitter Disable. Laser output disabled on high or open.
Module Definition 2. Data line for Serial ID.
Module Definition 1. Clock line for Serial ID.
Module Definition 0. Grounded within the module.
No connection required
Loss of Signal indication. Logic 0 indicates normal operation.
Receiver Ground (Common with Transmitter Ground)
Receiver Ground (Common with Transmitter Ground)
Receiver Ground (Common with Transmitter Ground)
Receiver Inverted DATA out. AC Coupled
Receiver Non-inverted DATA out. AC Coupled
Receiver Ground (Common with Transmitter Ground)
Receiver Power Supply
Transmitter Power Supply
Transmitter Ground (Common with Receiver Ground)
Transmitter Non-Inverted DATA in. 100 ohm termination between TD+
and TD-, AC Coupled thereafter.
Transmitter Inverted DATA in. See TD+
Transmitter Ground (Common with Receiver Ground)
Ref.
1
2
3
3
3
4
5
1
1
1
1
1
1
Notes:
1. Circuit ground is internally isolated from chassis ground.
2. Laser output disabled on
T
DIS
>2.0V or open, enabled on
T
DIS
<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
1
2
3
4
VeeT
TD-
TXFault
TD+
TX Disable
VeeT
MOD-DEF(2)
VccT
20
19
18
17
16
15
14
13
12
11
Towards
Bezel
5
6
7
8
9
10
MOD-DEF(1)
VccR
MOD-DEF(0)
VeeR
Rate Select
RD+
LOS
RD-
VeeR
VeeR
VeeR
Towards
ASIC
Diagram of Host Board Connector Block Pin Numbers and Names
Finisar Corporation April 2012 Rev.C
Page 2
FWLF1621P2Txx SFP Product Specification – April 2012
Finisar
II.
Absolute Maximum Ratings
Symbol
Vcc
T
S
T
OP
Min
-0.5
-40
-40
Typ
Max
4.7
85
85
Unit
V
C
C
Ref.
Parameter
Maximum Supply Voltage
Storage Temperature
Case Operating Temperature
III.
Electrical Characteristics
(T
OP
= -40 to 85 C, V
CC
= 3.11 to 3.5 Volts)
Symbol
Vcc
Icc
R
in
Vin,pp
V
D
V
EN
Min
3.1
Typ
200
100
250
Vcc – 1.3
Vee
1200
Vcc
Vee+ 0.8
10
800
175
175
Vcc
HOST
Vee+0.5
mV
V
V
us
mV
ps
ps
V
V
mVpp
Max
3.5
350
Unit
V
mA
Ref.
Parameter
Supply Voltage
Supply Current
Transmitter
Input differential impedance
Single ended data input swing
Transmit Disable Voltage
Transmit Enable Voltage
Transmit Disable Assert Time
Receiver
Single ended data output swing
Data output rise time
Data output fall time
LOS Fault
LOS Normal
Power Supply Rejection
1
2
Vout,pp
t
r
t
f
V
LOS fault
V
LOS norm
PSR
250
100
100
Vcc – 0.5
Vee
100
3
4
4
5
5
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. LOS (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 1.5 MHz up to
specified value applied through the recommended power supply filtering network.
Finisar Corporation April 2012 Rev.C
Page 3
FWLF1621P2Txx SFP Product Specification – April 2012
Finisar
IV.
Low Speed Signals
Symbol
Min
-42
0.5
t_loss_on
t_loss_off
t_off
Typ
-36
-34
2
Max
Units Notes/Conditions
dBm
dBm
dB
sec From detection of loss of signal
to assertion of RX_LOS
sec From detection of presence of
signal to negation of RX_LOS
sec Rising edge of TX_DISABLE to
fall of output signal below 10%
of nominal
sec Falling edge of TX_DISABLE to
rise of output signal above 90%
of nominal. Time indicated is
under steady-state temperature
conditions.
sec TX_DISABLE HIGH before
TX_DISABLE set LOW
sec From fault to assertion of
TX_FAULT
sec From power on to negation of
TX_FAULT using
TX_DISABLE
Parameter
RX_LOS Assert Level
RX_LOS Deassert Level
RX_LOS Hysteresis
RX_LOS Assert Delay
RX_LOS Negate Delay
TX_DISABLE Assert Time
-30
100
100
10
TX_DISABLE Negate Time
t_on
1000
TX_DISABLE Reset Time
TX_FAULT Assert
Initialization Time
t_reset
10
100
300
Finisar Corporation April 2012 Rev.C
Page 4
FWLF1621P2Txx SFP Product Specification – April 2012
Finisar
V.
Optical Characteristics (T
OP
= -40 to 85 C, V
CC
= 3.1 to 3.5 Volts)
Parameter
Symbol
P
OUT
Min
0
(X-6.5)
Typ
Max
+5
(X+6.5)
0.125
1
Unit
dBm
nm
nm/°C
nm
dB
dB
ps
dB/Hz
mUI
dB
dB
dBm
nm
mUI
dB
Ref.
2
3
4
5
6
7
8
Transmitter
Output Opt. Pwr (EOL)
Optical Wavelength
Wavelength Temperature Dependence
Spectral Width
Optical Extinction Ratio
Sidemode Suppression Ratio
Optical Rise/Fall Time
RIN
Transmitter Jitter Generation
Dispersion Penalty at 80 km
Optical Return Loss
Receiver
Optical Input Power
Optical Input Wavelength
Receiver Jitter Generation
Optical Return Loss
(X)
0.08
ER
SMSR
min
t
r
/ t
f
RIN
8.2
30
180
-120
75
2.0
24
P
in
C
-27
1450
27
-7
1620
75
9
7
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 -40 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-253
2
section 5.6 for OC-48 B.
8. SMF-28 fiber used. 60kms represents 1200ps/nm at 1610nm. Measured at 2.488Gb/s with a PRBS
2
23
-1 pattern at a BER<10
-12
.
9. P
in
represents the range of input powers where BER<10
-12
. P
in
is valid over all data rates specified in
Section VI.
Finisar Corporation April 2012 Rev.C
Page 5
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