F i n i s a r
Finisar Corporation March 2006 Rev A Page 1
Product Specification
OC-48 LR-1/STM L-16.1 Multirate 2x10 SFF Transceiver
FTLF1721S1xCL
PRODUCT FEATURES
• Up to 2.67Gb/s bi-directional
data links
• Standard 2x10 pin SFF footprint
(MSA compliant)
• Analog diagnostics functions
• Uncooled 1310nm DFB laser
transmitter
• APD Receiver
• Duplex LC connector
• Very low jitter
• Metal enclosure, for lower EMI
• Single 3.3V power supply
• Low power dissipation <900mW
typical
• Extended operating temperature
range: -10°C to 70°C
APPLICATIONS
• SONET OC-48 LR -1/ SDH STM L-16.1
• SONET OC-12 LR -1 / SDH STM L-4.1
• SONET OC-3 LR -1 / SDH STM L-1.1
• Gigabit Ethernet / 1x/2x Fibre Channel
Finisar’s FTLF1721S1xCL Small Form Factor (SFF) transceivers are compatible with the
Small Form Factor Multi-Sourcing Agreement (MSA)1. They comply with SONET OC-
48 LR-1 (SDH STM L-16.1) standards2, and are compatible with Gigabit Ethernet as
specified in IEEE Std 802.33, Fibre Channel FC-PI 13.04, SONET OC-12 and SONET
OC-3 standards2. The transceivers are RoHS compliant and lead-free per Directive
2002/95/EC5 and Finisar Application Note AN-20386
PRODUCT SELECTION
FTLF1721S1xCL
G
2 Grounding Pins, Short EMI shield
M 6 Grounding Pins, Short EMI shield
K 2 Grounding Pins, Long EMI shield
x
H 6 Grounding Pins, Long EMI shield
FTLF1721S1xCL 2x10 Pin SFF Product Specification – March 2006 F i n i s a r
Finisar Corporation March 2006 Rev A Page 2
I. Pin Descriptions
Pin Symbol Name/Description Logic Family
MS MS Mounting Studs for mechanical attachment. Chassis
ground is internally isolated from circuit ground.
Connection to chassis ground is recommended.
NA
1 PD Receiver Power Monitor. This pin must be connected to a
positive voltage supply (Vcc), preferably via a small
resistor. Supplies photocurrent and may be used to
monitor received power.
Analog
Current
2,3,6 VEER Receiver Ground (Common with Transmitter Ground) NA
4,5 NC Not Connected.
7 VCCR Receiver Power Supply NA
8 SD Signal Detect. Logic 1 indicates normal operation. LVTTL
9 RD- Receiver Inverted DATA out. AC Coupled CML
10 RD+ Receiver Non-inverted DATA out. AC Coupled CML
11 VCCT Transmitter Power Supply NA
12,16 VEET Transmitter Ground (Common with Receiver Ground) NA
13 TDIS Transmitter Disable LVTTL
14 TD+ Transmitter Non-Inverted DATA in. AC Coupled. CML
ECL
15 TD- Transmitter Inverted DATA in. AC Coupled. CML
ECL
17 Bmon- Laser Bias Monitoring (-). Analog
Voltage
18 Bmon+ Laser Bias Monitoring (+)
.(Bmon+ - Bmon-) = 10Ω x laser bias current. Analog
Voltage
19 Pmon- Laser Power Monitoring (-). Current implementation
connects this pin to ground Analog
Voltage
20 Pmon+ Laser Power Monitoring (+)
.(Pmon+ - Pmon-) = 200Ω x mon. photodiode current.
Analog
Voltage
TOP VIEW 6 7 8 9 10
MS
MS
1 2 3 4 5
15 14 13 12 11
20 19 18 17 16
FTLF1721S1xCL 2x10 Pin SFF Product Specification – March 2006 F i n i s a r
Finisar Corporation March 2006 Rev A Page 3
II. Absolute Maximum Ratings
Parameter Symbol Min Typ Max Unit Notes
Maximum Supply Voltage Vcc -0.5 4.5 V
Storage Temperature TS -40 85 °C
Case Operating Temperature TOP -10 70 °C
Relative Humidity RH 0 85 % 1
Lead Soldering Temperature/Time 260/10 °C/s
III. Electrical Characteristics (TOP = -10 to 70 °C, VCC = 3.00 to 3.60 Volts)
Parameter Symbol Min Typ Max Unit Notes
Supply Voltage Vcc 3.00 3.60 V
Supply Current Icc 270 340 mA
Transmitter
Input differential impedance Rin 100 Ω 2
Single ended data input swing Vin,pp 250 1200 mV
Transmit Disable Voltage VD Vcc – 1.3 Vcc V
Transmit Enable Voltage VEN Vee Vee+ 0.8 V 3
Transmit Disable Assert Time 10 us
Receiver
Single ended data output swing Vout,pp 300 400 800 mV 4
Data output rise time tr 100 175 ps 5
Data output fall time tf 100 175 ps 5
SD Assert VSD assert Vcc – 0.5 Vcc V 6
SD De-Assert VSD deassert Vee Vee+0.5 V 6
Power Supply Rejection PSR 100 mVpp 7
Total Generated Receiver Jitter
(peak to peak) JRXp-p 0.07 UI 8
Total Generated Receiver Jitter
(rms) JRXrms 0.007 UI 8
Notes:
1. Non condensing.
2. AC coupled.
3. Or open circuit.
4. Into 100 ohms differential termination.
5. 20 – 80 %
6. Signal Detect is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
7. 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)2, September 14, 2000.
8. Parameters per GR-2532 section 5.6 for OC-48B.
FTLF1721S1xCL 2x10 Pin SFF Product Specification – March 2006 F i n i s a r
Finisar Corporation March 2006 Rev A Page 4
IV. Optical Characteristics (TOP = -10 to 70°C, VCC = 3.00 to 3.60 Volts)
Parameter Symbol Min Typ Max Unit Notes
Transmitter
Output Opt. Pwr: 9/125 SMF POUT -2 +3 dBm 1
Optical Wavelength λ 1280 1335 nm
Spectral Width (-20dB) σ 1 nm
Optical Extinction Ratio ER 8.2 dB
Sidemode Suppression ratio SSRmin 30 dB
Optical Rise/Fall Time tr/ tf 180 ps 2
Relative Intensity Noise RIN -120 dB/Hz
Total Generated Transmitter Jitter
(peak to peak) JTXp-p 0.07 UI 3
Total Generated Transmitter Jitter
(rms) JTXrms 0.007 UI 3
Receiver
Average Rx Sensitivity @ 2.67Gb/s RSENS1 -9 -28 dBm 4
Average Rx Sensitivity @ OC-48 RSENS1 -9 -28 dBm 4
Average Rx Sensitivity @ 2X Fibre
Channel RSENS2 -9 -28 dBm 5
Average Rx Sensitivity @ Gigabit
Ethernet RSENS3 -9 -30 dBm 5
Average Rx Sensitivity @ OC-12 RSENS4 -9 -29 dBm 6
Average Rx Sensitivity @ OC-3 RSENS5 -15 -30 dBm 6
Optical Center (Input) Wavelength λC 1270 1620 nm
Receiver Reflectance RRx -27 dB
SD Assert SDA -28 dBm
SD De-Assert SDD -41 dBm
SD Hysteresis 0.5 dB
Notes:
1. Class 1 Laser Safety per FDA/CDRH and EN (IEC) 60825 regulations.
2. Unfiltered, 20 - 80%
3. Parameters per GR-2532 section 5.6 for OC-48B.
4. 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.
5. With worst-case extinction ratio. Measured with a PRBS 27-1 test pattern.
6. With worst-case extinction ratio. Measured with a PRBS 223-1 test pattern.
FTLF1721S1xCL 2x10 Pin SFF Product Specification – March 2006 F i n i s a r
Finisar Corporation March 2006 Rev A Page 5
V. General Specifications
Parameter Symbol Min Typ Max Units Notes
Data Rate BR 155 2667 Mb/s 1
Bit Error Rate BER 10-12 2
Max. Supported Link Length on
9/125µm SMF @ OC-48 LMAX1 45 km 3
Max. Supported Link Length on
9/125µm SMF @ 2X Fibre Channel LMAX2 47 km 3
Max. Supported Link Length on
9/125µm SMF @ Gigabit Ethernet LMAX3 50 km 3
Max. Supported Link Length on
9/125µm SMF @ OC-12 LMAX4 50 km 3
Max. Supported Link Length on
9/125µm SMF @ OC-3 LMAX5 50 km 3
Notes:
1. SONET OC-48 LR-2/SDH STM L-16.1 compliant. Compatible with Gigabit Ethernet, 1X/2X Fibre
Channel, 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
Parameter Symbol Min Typ Max Units
Case Operating Temperature Top -10 70 °C
Storage Temperature Tsto -40 85 °C
VII. 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.
FTLF1721S1xCL 2x10 Pin SFF Product Specification – March 2006 F i n i s a r
Finisar Corporation March 2006 Rev A Page 6
VIII. Analog Diagnostics Functions (Top = -10°C to 70 °C, VCC = 3.00 to 3.60 Volts)
Parameter Symbol Min Typ Max Unit Notes
Transmitter
Monitor photodiode current monitor Pmon+,
Pmon-
0 Vcc V 1
Laser bias current monitor Bmon+,
Bmon-
0 Vcc V 2
Receiver
Received photocurrent Rpd 0 1 mA 3
Photodiode responsivity R 0.5 0.9 1.0 A/W
Applied voltage at PD pin Vpd 2.4 Vcc V 3
Notes:
1. Pins 19 and 20 provide an analog voltage output proportional to the monitor photodiode current,
per the following formula: IBIAS = .V(Pmon+ - Pmon-) / 200Ω. The figure below shows the
equivalent circuit.
2. Pins 17 and 18 provide an analog voltage output proportional to the laser bias current, per the
following formula: IBIAS = .V(Bmon+ - Bmon-) / 10Ω. The figure below shows the equivalent
circuit.
3. Pin 1 is used to monitor the received photocurrent. It must be connected to a positive voltage
within the range specified above. The current that flows into this pin is the received photocurrent.
The received power is given by the photocurrent multiplied by the photodiode responsivity.
Vcc
10 Ω
3 KΩ
3 KΩ
Bmon+
Bmon-
Ibias
Vcc
200 Ω
3 KΩ
3 KΩ
Pmon+
Pmon-
Imon
Laser Monitor
Photodidoe
Vpd
Receiver
Photodidoe
Ipd
Analog monitoring function connections.
FTLF1721S1xCL 2x10 Pin SFF Product Specification – March 2006 F i n i s a r
Finisar Corporation March 2006 Rev A Page 7
IX. Mechanical Specifications
Finisar’s OC-48/STM-16 Small Form Factor (SFF) transceivers comply with the standard
dimensions defined by the Small Form Factor Multi-Sourcing Agreement (MSA).
FTRJ1721S1GCL – 2 pin version
FTLF1721S1xCL 2x10 Pin SFF Product Specification – March 2006 F i n i s a r
Finisar Corporation March 2006 Rev A Page 8
FTRJ1721S1HCL – 6 pin version
FTLF1721S1xCL 2x10 Pin SFF Product Specification – March 2006 F i n i s a r
Finisar Corporation March 2006 Rev A Page 9
FTLF1721S1HCL – 6 pin version (Long EMI Shield)
FTLF1721S1xCL 2x10 Pin SFF Product Specification – March 2006 F i n i s a r
Finisar Corporation March 2006 Rev A Page 10
X. PCB Layout and Bezel Recommendations
Minimum Recommended Module-to-Module Spacing is 0.6 inches
FTLF1721S1xCL 2x10 Pin SFF Product Specification – March 2006 F i n i s a r
Finisar Corporation March 2006 Rev A Page 11
XI. References
1. Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agreement
(MSA), September 2000. Documentation is currently available from Finisar
upon request.
2. “SONET Transport Systems: Common Generic Criteria”, Telcordia
Technologies, GR-253-CORE, Issue 3, Sept 2000. Also refer to ITU-T G.957
Specifications
3. IEEE Std 802.3, 2002 Edition, Clause 38, PMD Type 1000BASE-LX.
IEEE Standards Department, 2002. (Transmit Optical Output has a minimum
Extinction Ratio of 8.2 dB only). (*)
4. “Fibre Channel Draft Physical Interface Specification (FC-PI 13.0)”.
American National Standard for Information Systems. (*)
5. 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.
6. “Application Note AN-2038: Finisar Implementation of RoHS Compliant
Transceivers:. Finisar Corporation, January 21, 2005.
(*) Neither IEEE 802.3 nor FC-PI 13.0 specifies a DFB single mode interface.
The FTRJ1721S1xCL complies with these standards except for receiver sensitivity, ER
and transmit output power. See Section IV for details.
XII. 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
FTLF1721S1xCL 2x10 Pin SFF Product Specification – March 2006 F i n i s a r
Finisar Corporation March 2006 Rev A Page 12
