Finisar Corporation 7-May-16 Rev. B2 Finisar Page 1
Product Specification
100m Parallel MMF 100G QSFP28 Optical Transceiver
FTLC9551REPM
PRODUCT FEATURES
Hot-pluggable QSFP28 form factor
Supports 103.1Gb/s aggregate bit
rate
Power dissipation < 3.5W
RoHS-6 compliant
Commercial case temperature range
of 0°C to 70°C
Single 3.3V power supply
Maximum link length of 100m on
OM4 Multimode Fiber (MMF)
4x25Gb/s 850mm VCSEL-based
transmitter
4x25G electrical interface
Single MPO12 receptacle
I2C management interface
APPLICATIONS
100GBASE-SR4 100G Ethernet
Finisar’s FTLC9551REPM 100G QSFP28 transceiver modules are designed for use in
100 Gigabit Ethernet links over multimode fiber. They are compliant with the QSFP28
MSA1 and IEEE 802.3bm 100GBASE-SR42 and CAUI-42. Digital diagnostics functions
are available via the I2C interface, as specified by the QSFP28 MSA1 and Finisar
Application Note AN-21413. The transceiver is RoHS-6 compliant per Directive
2011/65/EU4 and Finisar Application Note AN-20385.
PRODUCT SELECTION
FTLC9551REPM
R: 100G Ethernet maximum bit rate (103.1Gb/s)
E: 4x25G parallel optics
P: Pull tab release
M: MPO receptacle
FTLC9551REPM Product Specification January 2016
Finisar Corporation 7-May-16 Rev. B2 Finisar Page 2
I. Pin Descriptions
Figure 1 QSFP28-compliant 38-pin connector (per SFF-8679)
Pin
Symbol
Name/Description
Notes
1
GND
Ground
1
2
Tx2n
Transmitter Inverted Data Input
3
Tx2p
Transmitter Non-Inverted Data Input
4
GND
Ground
1
5
Tx4n
Transmitter Inverted Data Input
6
Tx4p
Transmitter Non-Inverted Data Input
7
GND
Ground
1
8
ModSelL
Module Select
9
ResetL
Module Reset
10
Vcc Rx
+3.3 V Power supply receiver
11
SCL
2-wire serial interface clock
12
SDA
2-wire serial interface data
13
GND
Ground
1
14
Rx3p
Receiver Non-Inverted Data Output
15
Rx3n
Receiver Inverted Data Output
16
GND
Ground
1
17
Rx1p
Receiver Non-Inverted Data Output
18
Rx1n
Receiver Inverted Data Output
19
GND
Ground
1
20
GND
Ground
1
21
Rx2n
Receiver Inverted Data Output
22
Rx2p
Receiver Non-Inverted Data Output
23
GND
Ground
1
24
Rx4n
Receiver Inverted Data Output
25
Rx4p
Receiver Non-Inverted Data Output
26
GND
Ground
1
27
ModPrsL
Module Present
28
IntL
Interrupt
29
Vcc Tx
+3.3 V Power supply transmitter
30
Vcc1
+3.3 V Power Supply
FTLC9551REPM Product Specification January 2016
Finisar Corporation 7-May-16 Rev. B2 Finisar Page 3
31
LPMode
Low Power Mode
32
GND
Ground
1
33
Tx3p
Transmitter Non-Inverted Data Input
34
Tx3n
Transmitter Inverted Data Input
35
GND
Ground
1
36
Tx1p
Transmitter Non-Inverted Data Input
37
Tx1n
Transmitter Inverted Data Input
38
GND
Ground
1
Notes
1. Circuit ground is internally isolated from chassis ground.
II. Absolute Maximum Ratings
Module performance is not guaranteed beyond the operating range (see Section VI).
Exceeding the limits below may damage the transceiver module permanently.
Parameter
Symbol
Min
Typ
Unit
Ref.
Maximum Supply Voltage
Vcc
-0.5
V
Storage Temperature
TS
-40
C
Case Operating Temperature
TOP
-5
C
1
Relative Humidity
RH
15
%
2
Receiver Damage Threshold, per Lane
PRdmg
3.4
dBm
Notes:
1. 48-hour excursions, maximum
2. Non-condensing.
III. Electrical Characteristics (EOL, TOP = 0 to 70 C, VCC = 3.135 to 3.465 Volts)
Parameter
Symbol
Min
Typ
Unit
Ref.
Supply Voltage
Vcc
3.135
V
Supply Current
Icc
A
Module total power
P
W
1
Transmitter
Signaling rate per lane
25.78125 ± 100ppm
Gb/s
Differential pk-pk input voltage
tolerance
Vin,pp,diff
900
mV
Single-ended voltage tolerance
Vin,pp
-0.35
+3.3
V
Module stress input test
Per Section 83E.3.4.1, IEEE
802.3bm
Receiver
Signaling rate per lane
25.78125 ± 100ppm
Gb/s
Differential data output swing
Vout,pp
100
400
mVpp
2
300
600
400
600
800
600
1200
Eye width
0.57
UI
Eye height, differential
228
mV
Vertical eye closure
VEC
5.5
dB
Transition time (20% to 80%)
tr, tf
12
ps
FTLC9551REPM Product Specification January 2016
Finisar Corporation 7-May-16 Rev. B2 Finisar Page 4
Notes:
1. Maximum total power value is specified across the full operational temperature and voltage range
when CDRs are locked or a lack of input signal results in squelch being activated. If incorrect
frequencies cause the CDRs to continuously attempt to lock, maximum power dissipation may reach
4.5 W.
2. Output voltage is settable in 4 discrete ranges via I2C. Default range is Range 2 (400 800 mV).
IV. Optical Characteristics (EOL, TOP = 0 to 70C, VCC = 3.135 to 3.465 Volts)
Parameter
Symbol
Min
Typ
Max
Unit
Ref.
Transmitter
Signaling Speed per Lane
25.78125 ± 100ppm
Gb/s
1
Center wavelength
840
850
860
nm
RMS Spectral Width
SW
0.6
nm
Average Launch Power per Lane
TXPx
-8.4
2.4
dBm
Transmit OMA per Lane
TxOMA
-6.4
3
dBm
Launch Power [OMA] minus TDEC
per Lane
P-TDEC
-7.3
dBm
TDEC per Lane
TDEC
4.3
dBm
Optical Extinction Ratio
ER
2
dB
Optical Return Loss Tolerance
ORL
12
dB
Encircled Flux
FLX
>86% at 19 um
<30% at 4.5 um
Average Launch Power of OFF
Transmitter, per Lane
-30
dBm
Transmitter Eye mask definition {X1,
X2, X3, Y1, Y2, Y3}
{0.3,0.38,0.45,0.35,0.41,0.5}
2
Receiver
Signaling Speed per Lane
25.78125 ± 100ppm
GBd
3
Center wavelength
840
860
nm
Damage Threshold
DT
3.4
dBm
Average Receive Power per Lane
RXPx
-10.3
2.4
dBm
4
Receive Power (OMA) per Lane
RxOMA
3
dBm
Receiver Reflectance
Rfl
-12
dB
Stressed Receiver Sensitivity (OMA)
per Lane
SRS
-5.2
dBm
Stressed Conditions:
Stressed Eye Closure
SEC
4.3
dB
Stressed Eye J2 Jitter
J2
0.39
UI
Stressed Eye J4 Jitter
J4
0.53
UI
OMA of each aggressor lane
3
dBm
Stressed Receiver Eye Mask
Definition {X1, X2, X3, Y1, Y2,
Y3}
{0.28,0.5,0.5,0.33,0.33,0.4}
5
LOS De-Assert
LOSD
-13
dBm
LOS Assert
LOSA
-30
dBm
LOS Hysteresis
0.5
2
dB
Notes:
1. Transmitter consists of 4 lasers operating at a maximum speed of 25.78125Gb/s ±100ppm each.
2. Hit Ratio 1.5 x 10-3 hits/sample.
3. Receiver consists of 4 photodetectors operating at a maximum speed of 25.78125Gb/s ±100ppm each.
4. Minimum value is informative only and not the principal indicator of signal strength.
5. Hit Ratio 5 x 10-5 hits/sample.
FTLC9551REPM Product Specification January 2016
Finisar Corporation 7-May-16 Rev. B2 Finisar Page 5
V. General Specifications
Parameter
Symbol
Min
Typ
Max
Units
Ref.
Bit Rate (all wavelengths combined)
BR
103.1
Gb/s
1
Bit Error Ratio (pre-FEC)
BER
5x10-5
2
Maximum Supported Distances
Fiber Type
OM3 MMF
Lmax1
70
m
3
OM4 MMF
Lmax2
100
m
3
Notes:
1. Supports 100GBASE-SR4 per IEEE 802.3bm.
2. Tested with a 231 1 PRBS.
3. Requires FEC on the host to support maximum distance, per 100GBASE-SR4.
VI. Environmental Specifications
Finisar FTLC9551 QSFP28 transceivers have a commercial operating case temperature
range of 0°C to +70°C. They can support temporary excursions to case temperatures of
-5°C and +75°C without permanent damage (see Section II).
Parameter
Symbol
Min
Typ
Max
Units
Ref.
Case Operating Temperature
Top
0
70
°C
Storage Temperature
Tsto
-40
85
°C
VII. Regulatory Compliance
Finisar FTLC9551 QSFP28 transceivers are Class 1 Laser Products. They are certified
per the following standards:
Feature
Agency
Standard
Laser Eye
Safety
FDA/CDRH
CDRH 21 CFR 1040 and Laser Notice 50
Laser Eye
Safety
TÜV
EN 60825-1:2007
EN 60825-2:2004+A1+A2
Electrical
Safety
TÜV
EN 60950
Electrical
Safety
UL/CSA
CLASS 3862.07
CLASS 3862.87
Copies of the referenced certificates will be available at Finisar upon request.
Complies with FDA performance standards for laser products except for deviations
pursuant to Laser Notice No. 50, dated June 24, 2007.
FTLC9551REPM Product Specification January 2016
Finisar Corporation 7-May-16 Rev. B2 Finisar Page 6
VIII. Digital Diagnostics Functions
FTLC9551 QSFP28 transceivers support the I2C-based diagnostics interface specified by
the QSFP28 MSA1. See Finisar Application Note AN-2141 3.
IX. Memory Contents
Per the QSFP28 MSA1. See Finisar Application Note AN-2141 3.
XI. Mechanical Specifications
Finisar FTLC9551 QSFP28 transceivers are compatible with the QSFP28 MSA
specification1.
Figure 2. FTLC9551REPM Mechanical Dimensions.
Figure 3. Standard Product Label
FTLC9551REPM Product Specification January 2016
Finisar Corporation 7-May-16 Rev. B2 Finisar Page 7
XII. References
1. SFF-8665: “QSFP+ 28Gb/s 4X Pluggable Transceiver Solution (QSFP28)”, Rev 1.9,
June 29, 2015 (and associated SFF documents)
i. SFF-8661
ii. SFF-8679
iii. SFF-8636
iv. SFF-8662
v. SFF-8663
vi. SFF-8672
vii. SFF-8683
2. IEEE 802.3bm, PMD Type 100GBASE-SR4 and CAUI-4.
3. Application Note AN-2141, “100G QSFP28 SR4 NVR Application Note”, Finisar
Corporation.
4. Directive 2011/65/EU of the European Parliament and of the Council, “on the
restriction of the use of certain hazardous substances in electrical and electronic
equipment,” July 1, 2011.
5. “Application Note AN-2038: Finisar Implementation Of RoHS Compliant
Transceivers”, Finisar Corporation, January 21, 2005.
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