Product Specification
OC-48 LR-2/STM L-16.2 RoHS Compliant Pluggable SFP Transceiver
FTLF1621P1xCL
PRODUCT FEATURES
•
Up to 2.67Gb/s bi-directional
data links
•
Hot-pluggable SFP footprint
•
Built-in digital diagnostic functions
•
Uncooled 1550nm DFB laser
transmitter
•
APD Receiver
•
Duplex LC connector
•
RoHS Compliant
•
Metal enclosure, for lower EMI
•
Single 3.3V power supply
•
Low power dissipation typically
<700mW
•
APPLICATIONS
•
SONET OC-48 LR-2 / SDH STM L-16.2
•
SONET OC-12 / SDH STM 4
•
SONET OC-3 / SDH STM-1
•
Gigabit Ethernet / 1x/2x Fibre
Channel
Extended operating temperature
range: -10°C to 70°C
Finisar’s FTLF1621P1xCL Small Form Factor Pluggable (SFP) transceivers are
compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA)1.
They comply with SONET OC-48 LR-2 (SDH STM L-16.2) standards2, Gigabit Ethernet
as specified in IEEE Std 802.33(*) and Fibre Channel FC-PI 13.04(*). They are compatible
with SONET OC-12 SR and SONET OC-3 standards2. Digital diagnostics functions are
available via the 2-wire serial bus specified in the SFP MSA. The optical transceiver is
compliant per the RoHS Directive 2011/65/EU5. See Finisar Application Note AN-2038
for more details6.
PRODUCT SELECTION
FTLF1621P1xCL
x
 Finisar Corporation October 2015
W
B
Wide Extraction Bail
Narrow Extraction Bail
Rev. B1
Page 1
FTLF1621P1xCL Product Specification
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
RDRD+
V EER
V CCR
V CCT
V EET
TD+
TDV EET
Name/Description
Transmitter Ground (Common with Receiver Ground)
Transmitter Fault.
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. AC Coupled.
Transmitter Inverted DATA in. AC Coupled.
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 3.6V.
MOD_DEF(0) pulls line low to indicate module is plugged in.
4. Finisar FTRJxx21xxxxx transceivers operate between OC-3 and OC-48, 1x and 2x Fibre Channel, and
Gigabit Ethernet data rates and respective protocols without active control. Finisar FTRJxx19xxxxx
transceivers operate at 1x and 2x Fibre Channel, and Gigabit Ethernet data rates and respective
protocols 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 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.
Towards
Bezel
1
VeeT
2
TXFault
3
TX Disable
4
MOD-DEF(2)
5
MOD-DEF(1)
6
MOD-DEF(0)
7
Rate Select
8
LOS
9
VeeR
10
VeeR
VeeT
20
TD-
19
TD+
18
VeeT
17
VccT
16
VccR
15
VeeR
14
RD+
13
RD-
12
VeeR
11
Towards
ASIC
Diagram of Connector Block Pinout on the Host Board
 Finisar Corporation October 2015
Rev. B1
Page 2
FTLF1621P1xCL Product Specification
II.
Absolute Maximum Ratings
Parameter
Maximum Supply Voltage
Storage Temperature
Case Operating Temperature
III.
Symbol
Vcc
TS
T OP
Min
-0.5
-40
-10
Typ
Max
4.5
85
70
Unit
V
°C
°C
Ref.
Max
3.60
300
Unit
V
mA
Ref.
Ω
mV
V
V
us
1
1200
Vcc
Vee+ 0.8
10
3
4
4
5
5
6
0.07
mV
ps
ps
V
V
mVpp
UI
0.007
UI
Electrical Characteristics (TOP = -10 to 70 °C, VCC = 3.00 to 3.60 Volts)
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
Total Generated Reciever Jitter
(peak to peak)
Total Generated Reciever Jitter
(rms)
Symbol
Vcc
Icc
R in
Vin,pp
VD
V EN
Vout,pp
tr
tf
V LOS fault
V LOS norm
PSR
J RX p-p
Min
3.00
Typ
230
100
250
Vcc – 1.3
Vee
300
Vcc – 0.5
Vee
100
J RX rms
400
100
100
800
175
175
Vcc HOST
Vee+0.5
2
Notes:
1. AC coupled.
2. Or open circuit.
3. Into 100 ohms differential termination.
4. 10 – 90 %
5. Loss Of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
6. All transceiver specifications are compliant with a power supply sinusoidal modulation of 20 Hz to 1.5
MHz up to specified value applied through the power supply filtering network shown on page 23 of the
Small Form-factor Pluggable (SFP) Transceiver MultiSource Agreement (MSA), September 14, 2000.
 Finisar Corporation October 2015
Rev. B1
Page 3
FTLF1621P1xCL Product Specification
IV.
Optical Characteristics (TOP = -10 to 70°C, VCC = 3.00 to 3.60 Volts)
Parameter
Transmitter
Output Opt. Pwr: 9/125 SMF
Optical Wavelength
Spectral Width (-20dB)
Optical Extinction Ratio
Sidemode Supression ratio
Optical Rise/Fall Time
Total Generated Transmitter Jitter
(peak to peak)
Total Generated Transmitter Jitter
(rms)
Receiver
Average Rx Sensitivity @ 2.67Gb/s
Average Rx Sensitivity @ OC-48
Average Rx Sensitivity @ 2X Fibre
Channel
Average Rx Sensitivity @ Gigabit
Ethernet
Average Rx Sensitivity @ OC-12
Average Rx Sensitivity @ OC-3
Maximum Input Power
Optical Center Wavelength
LOS De-Assert
LOS Assert
LOS Hysteresis
Symbol
Min
P OUT
λ
σ
ER
SSR min
tr/ tf
J TX p-p
-2
1500
Max
Unit
Ref.
+3
1580
1
1
180
0.07
dBm
nm
nm
dB
dB
ps
UI
J TX rms
0.007
UI
R SENS1
R SENS1
R SENS2
-28
-28
-28
dBm
dBm
dBm
3
3
4
R SENS3
-30
dBm
4
-29
-30
dBm
dBm
dBm
nm
dBm
dBm
dB
5
5
R SENS4
R SENS5
P MAX
λC
LOS D
LOS A
Typ
9
30
-15
-9
1270
-41
0.5
1600
-28
2
Notes:
1. Class 1 Laser Safety per FDA/CDRH and IEC-825-1 regulations.
2. Unfiltered
3. With worst-case extinction ratio at 10-10 BER. Measured with a PRBS 231-1 test pattern interspersed
with 72 consecutive ones and 72 consecutive zeros.
4. With worst-case extinction ratio. Measured with a PRBS 27-1 test pattern.
5. With worst-case extinction ratio. Measured with a PRBS 223-1 test pattern.
 Finisar Corporation October 2015
Rev. B1
Page 4
FTLF1621P1xCL Product Specification
V.
General Specifications
Parameter
Data Rate
Bit Error Rate
Max. Supported Link Length on
9/125µm SMF @ OC-48
Max. Supported Link Length on
9/125µm SMF @ 2X Fibre Channel
Max. Supported Link Length on
9/125µm SMF @ Gigabit Ethernet
Max. Supported Link Length on
9/125µm SMF @ OC-12
Max. Supported Link Length on
9/125µm SMF @ OC-3
Symbol
BR
BER
L MAX1
Min
155
Typ
Max
2667
10-12
Units
Mb/s
Ref.
80
km
1
2
3
L MAX2
85
km
3
L MAX3
100
km
3
L MAX4
100
km
3
L MAX5
100
km
3
Notes:
1. SONET OC-48 LR-2/SDH STM L-16.2, Gigabit Ethernet and 1X/2X Fibre Channel compliant.
Compatible with SONET OC-12 and OC-3. Supports FEC at 2.67Gb/s.
2. Tested with a PRBS 231-1 test pattern interspersed with 72 consecutive ones and 72 consecutive zeros
unless otherwise specified.
3. Attenuation of 0.275 dB/km is used for the link length calculations (per GR-253 CORE). A 2dB
penalty is included for dispersion on >2Gb/s data rates. Distances are indicative only. Please refer to
the Optical Specifications in Table IV to calculate a more accurate link budget based on specific
conditions in your application.
VI.
Environmental Specifications
Finisar SFP transceivers have an extended operating temperature range from -10°C to
+70°C case temperature.
Parameter
Case Operating Temperature
Storage Temperature
VII.
Symbol
T op
T sto
Min
-10
-40
Typ
Max
70
85
Units
°C
°C
Ref.
Regulatory Compliance
Finisar transceivers are Class 1 Laser Products and comply with US FDA regulations.
These products are certified by TÜV and CSA to meet the Class 1 eye safety
requirements of EN (IEC) 60825 and the electrical safety requirements of
EN (IEC) 60950. Copies of certificates are available at Finisar Corporation upon request.
VIII. Digital Diagnostic Functions
Finisar FTLF1621P1xCL SFP transceivers support the 2-wire serial communication
protocol as defined in the SFP MSA1. It is very closely related to the E2PROM defined in
the GBIC standard, with the same electrical specifications.
 Finisar Corporation October 2015
Rev. B1
Page 5
FTLF1621P1xCL Product Specification
The standard SFP serial ID provides access to identification information that describes
the transceiver’s capabilities, standard interfaces, manufacturer, and other information.
Additionally, Finisar SFP transceivers provide a unique enhanced digital diagnostic
monitoring interface, which allows real-time access to device operating parameters such
as transceiver temperature, laser bias current, transmitted optical power, received optical
power and transceiver supply voltage. It also defines a sophisticated system of alarm and
warning flags, which alerts end-users when particular operating parameters are outside of
a factory set normal range.
The SFP MSA defines a 256-byte memory map in E2PROM that is accessible over a
2-wire serial interface at the 8 bit address 1010000X (A0h). The digital diagnostic
monitoring interface makes use of the 8 bit address 1010001X (A2h), so the originally
defined serial ID memory map remains unchanged. The interface is identical to, and is
thus fully backward compatible with both the GBIC Specification and the SFP Multi
Source Agreement. The complete interface is described in Finisar Application Note AN2030: “Digital Diagnostics Monitoring Interface for SFP Optical Transceivers”.
The operating and diagnostics information is monitored and reported by a Digital
Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed
through a 2-wire serial interface. When the serial protocol is activated, the serial clock
signal (SCL, Mod Def 1) is generated by the host. The positive edge clocks data into the
SFP transceiver into those segments of the E2PROM that are not write-protected. The
negative edge clocks data from the SFP transceiver. The serial data signal (SDA, Mod
Def 2) is bi-directional for serial data transfer. The host uses SDA in conjunction with
SCL to mark the start and end of serial protocol activation. The memories are organized
as a series of 8-bit data words that can be addressed individually or sequentially.
For more information, please see the SFP MSA documentation1 or Finisar Application
Note AN-2030.
 Finisar Corporation October 2015
Rev. B1
Page 6
FTLF1621P1xCL Product Specification
IX.
Mechanical Specifications
Finisar’s Small Form Factor Pluggable (SFP) transceivers are compatible with the
dimensions defined by the SFP Multi-Sourcing Agreement (MSA) 3.
FTLF1621P1BCL
 Finisar Corporation October 2015
Rev. B1
Page 7
FTLF1621P1xCL Product Specification
FTLF1621P1WCL
 Finisar Corporation October 2015
Rev. B1
Page 8
FTLF1621P1xCL Product Specification
X.
PCB Layout and Bezel Recommendations
 Finisar Corporation October 2015
Rev. B1
Page 9
FTLF1621P1xCL Product Specification
 Finisar Corporation October 2015
Rev. B1
Page 10
FTLF1621P1xCL Product Specification
XI.
References
1.
Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA),
September 2000. Documentation is currently available at Finisar upon request.
2.
Telcordia GR-253 and ITU-T G.957 Specifications (Transmitter Optical Output
Power complies with SONET OC-48 requirements only).
3.
IEEE Std 802.3, 2002 Edition, Clause 38, PMD Type 1000BASE-LX.
IEEE Standards Department, 2002. (*)
4.
“Fibre Channel Draft Physical Interface Specification (FC-PI-2 Rev 7.0)”.
American National Standard for Information Systems. (*)
5.
Directive 2011/65/EU of the European Council Parliament and of the Council,
“on the restriction of the use of certain hazardous substances in electrical and
electronic equipment”. Certain products may use one or more exemptions as
allowed by the Directive.
6.
“Application Note AN-2038: Finisar Implementation of RoHS Compliant
Transceivers”.
(*) Neither IEEE 802.3 nor FC-PI-2 Rev 7.0 specifies a 1550nm DFB single mode
interface. The FTLF1621P2xCL complies with these standards except for receiver
sensitivity, and transmit output power. See Section IV for details.
XII.
For More Information
Finisar Corporation
1389 Moffett Park Drive
Sunnyvale, CA 94089-1133
Tel. 1-408-548-1000
Fax 1-408-541-6138
sales@finisar.com
www.finisar.com
 Finisar Corporation October 2015
Rev. B1
Page 11
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Authorized Distributor
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