Finisar Corporation August 2016 Rev. A1 Page 1
Product Specification
40GE Universal LM4 QSFP+ Optical Transceiver Module
FTL4C3QE2C
9BPRODUCT FEATURES
Hot-pluggable QSFP+ form factor
Operates over duplex multimode and
single mode fiber with dual LC
receptacles
Supports 41.2 Gb/s aggregate bit rate
Power dissipation < 3.5W
Commercial case temperature range
0°C to 70°C
Maximum link length of 140m on
OM3, 160m on OM4, and 1km on
SMF
Uncooled 4x10Gb/s CWDM
transmitter
XLPPI electrical interface
Built-in digital diagnostic functions,
including Tx/Rx power monitoring
RoHS-6 compliant
1
APPLICATION
40G Ethernet over MMF and
SMF
Finisar’s FTL4C3QE2C QSFP+ transceiver modules are designed for use in 40 Gigabit
Ethernet links over duplex multimode or single mode fiber. They are compliant with the
QSFP+ MSA1,2 and represent a multimode adaptation of IEEE 802.3ba 40GBASE-LR43
refered to as LM4. Digital diagnostics functions are available via an I2C interface, as specified
by the QSFP+ MSA. The optical transceiver is compliant per the RoHS Directive
2011/65/EU4. See Finisar Application Note AN-2038 for more details5.
3B
PRODUCT SELECTION
16BFTL4C3QE2C
C3: 1271 - 1331 nm CWDM over MMF and SMF
E: 40G Ethernet
2: Second generation product
C: Commercial temperature range
FTL4C3QE2C Product Specification
Finisar Corporation August 2016 Rev. A1 Page 2
I. Pin Descriptions
Figure 1 – QSFP+ MSA-compliant 38-pin connector
Pin
6BSymbol
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
FTL4C3QE2C Product Specification
Finisar Corporation August 2016 Rev. A1 Page 3
29
Vcc Tx
+3.3 V Power supply transmitter
30
Vcc1
+3.3 V Power Supply
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
UNotes
1. Circuit ground is internally isolated from chassis ground.
II. General Product Characteristics
Parameter
Value
Unit
Notes
Module Form Factor
QSFP+
Maximum Aggregate Data Rate
41.2
Gb/s
Maximum Data Rate per Lane
10.3125
Gb/s
Protocols Supported
40G Ethernet
Electrical Interface and Pin-out
38-pin edge connector
Pin-out as defined by the
QSFP+ MSA
Maximum Power Consumption
3.5
Watts
Management Interface
Serial, I2C-based, 400 kHz
maximum frequency
As defined by the QSFP+ MSA
Symbol
Min
Typ
Max
Units
Ref.
BR
10,313
Mb/sec
1
BER
10-12
2
d
140
m
d
160
m
d
1000
m
UNotesU:
1. Adapted from 40GBASE-LR4, IEEE 802.3ba
2. Tested with a PRBS 231-1 test pattern.
FTL4C3QE2C Product Specification
Finisar Corporation August 2016 Rev. A1 Page 4
III. 1Absolute Maximum Ratings
Parameter
Symbol
Min
Typ
Max
Unit
Ref.
Maximum Supply Voltage
Vcc1,
VccTx,
VccRx
-0.5
3.6
V
Storage Temperature
TS
-40
85
C
Case Operating Temperature
TOP
0
70
C
Relative Humidity
RH
0
85
%
1
Damage Threshold, per Lane
DT
5.5
dBm
UNotesU:
1. Non-condensing.
IV. Electrical Characteristics (TOP = 0 to 70C, VCC = 3.1 to 3.47 Volts)
Parameter
Symbol
Min
Typ
Max
Unit
Ref.
Supply Voltage
Vcc1,
VccTx,
VccRx
3.1
3.47
V
Supply Current
Icc
1.13
A
Link turn-on time
Transmit turn-on time
2000
ms
2
Transmitter (per Lane)
Single ended input voltage tolerance
VinT
-0.3
4.0
V
Differential data input swing
Vin,pp
120
1200
mVpp
3
Differential input threshold
50
mV
AC common mode input voltage tolerance
(RMS)
15
mV
Differential input return loss
Per IEEE P802.3ba,
Section 86A.4.1.1
dB
4
J2 Jitter Tolerance
Jt2
0.17
UI
J9 Jitter Tolerance
Jt9
0.29
UI
Data Dependent Pulse Width Shrinkage
DDPWS
0.07
UI
Eye mask coordinates {X1, X2
Y1, Y2}
0.11, 0.31
95, 350
UI
mV
5
Receiver (per Lane)
Single-ended output voltage
-0.3
4.0
V
Differential data output swing
Vout,pp
0
800
mVpp
6
AC common mode output voltage (RMS)
7.5
mV
Termination mismatch at 1 MHx
5
%
Differential output return loss
Per IEEE P802.3ba,
Section 86A.4.2.1
dB
4
Common mode output return loss
Per IEEE P802.3ba,
Section 86A.4.2.2
dB
4
Output transition time, 20% to 80%
28
ps
J2 Jitter output
Jo2
0.42
UI
J9 Jitter output
Jo9
0.65
UI
Eye mask coordinates #1 {X1, X2
Y1, Y2}
0.29, 0.5
150, 425
UI
mV
5
Power Supply Ripple Tolerance
PSR
50
mVpp
UNotesU:
1. Maximum total power value is specified across the full temperature and voltage range.
FTL4C3QE2C Product Specification
Finisar Corporation August 2016 Rev. A1 Page 5
2. From power-on and end of any fault conditions.
3. After internal AC coupling. Self-biasing 100 differential input.
4. 10 MHz to 11.1 GHz range.
5. Hit ratio = 5 x 10E-5.
6. AC coupled with 100 differential output impedance.
V. Optical Characteristics (TOP = 0 to 70C, VCC = 3.1 to 3.47 Volts)
Parameter
Symbol
Min
Typ
Max
Unit
Ref.
Transmitter
Signaling Speed per Lane
10.3125
GBd
1
Lane center wavelengths (range)
1264.5 – 1277.5
1284.5 – 1297.5
1304.5 – 1317.5
1324.5 – 1337.5
nm
Total Average Launch Power
POUT
10.3
dBm
Transmit OMA per Lane, MMF
TxOMA
-3.0
4.8
dBm
Transmit OMA per Lane, SMF
-6.0
3.5
Average Launch Power per Lane, MMF
TXPx
-7.0
4.3
dBm
2
Average Launch Power per Lane, SMF
-10.0
2.3
Optical Extinction Ratio
ER
3.5
dB
Transmitter Dispersion Penalty, MMF
TDP
4.7
dB
Transmitter Dispersion Penalty, SMF
2.6
Transmitter OMA - TDP, MMF
TxP-TDP
-7.2
dBm
3
Transmitter OMA - TDP, SMF
-6.8
Sidemode Suppression ratio
SSRmin
30
dB
Average launch power of OFF
transmitter, per lane
-30
dBm
Relative Intensity Noise
RIN
-128
dB/Hz
4
Optical Return Loss Tolerance
20
dB
Transmitter Reflectance
-12
dB
Transmitter eye mask definition
{X1, X2, X3, Y1, Y2, Y3}
{0.25, 0.4, 0.45, 0.25, 0.28,
0.4}
Receiver
Signaling Speed per Lane
10.3125
GBd
5
Lane center wavelengths (range)
1264.5 – 1277.5
1284.5 – 1297.5
1304.5 – 1317.5
1324.5 – 1337.5
nm
Receive Power (OMA) per Lane, MMF
RxOMA
4.8
dBm
Receive Power (OMA) per Lane, SMF
3.3
Average Receive Power per Lane, MMF
RXPx
-10.0
4.3
dBm
6,7
Average Receive Power per Lane, SMF
-13.7
2.3
Receiver Sensitivity (OMA) per Lane,
MMF
Rxsens
-10.5
dBm
Receiver Sensitivity (OMA) per Lane,
SMF
-10.5
7
Stressed Receiver Sensitivity (OMA) per
Lane, MMF
SRS
-5.0
dBm
Stressed Receiver Sensitivity (OMA) per
Lane, SMF
-8.5
6
Damage Threshold per Lane
PMAX
5.5
dBm
FTL4C3QE2C Product Specification
Finisar Corporation August 2016 Rev. A1 Page 6
Return Loss
RL
-20
dB
Vertical eye closure penalty, per lane
3.6
dB
Receive electrical 3 dB upper cutoff
frequency, per lane
12.3
GHz
LOS De-Assert
LOSD
-12
dBm
7
LOS Assert
LOSA
-28
dBm
7
LOS Hysteresis
0.5
dB
UNotesU:
1. Transmitter consists of 4 lasers operating at 10.3Gb/s each.
2. Minimum value is informative.
3. Even if TDP < 0.5 dB (MMF) or TDP < 0.8 dB (SMF), TxP – TDP must be geater than this value.
4. RIN is scaled by 10*log(10/4) to maintain SNR outside of transmitter.
5. Receiver consists of 4 photodetectors operating at 10.3Gb/s each.
6. Minimum value is informative, equals min TxOMA with infinite ER and max channel insertion loss.
7. SMF receiver sensitivity guaranteed by design, but nots measured in production.
8. LOS Assert and De-Assert values are informative and may vary between MMF and SMF uses.
VI. 1Memory Map and Control Registers
Compatible with SFF-8636 2. Please see Finisar Application Note AN-21046 for memory
map details.
Although this module is designed for both multimode and single mode fiber operation, the
Tx and Rx power monitors are calibrated for multimode fiber. Therefore, the DDM reading
should be relied upon only for multimode operation.
VII. 1Environmental Specifications
Finisar FTL4C3QE2C transceivers have an operating temperature range from 0°C to +70°C
case temperature.
Environmental Specifications
Symbol
Min
Typ
Max
Units
Ref.
Case Operating Temperature
Top
0
70
°C
Storage Temperature
Tsto
-40
85
°C
VIII. Regulatory Compliance
Finisar FTL4C3QE2C transceivers are RoHS-6 Compliant. Copies of certificates are
available at Finisar Corporation upon request.
FTL4C3QE2C transceiver modules are Class 1 laser eye safety compliant per IEC 60825-1.
FTL4C3QE2C Product Specification
Finisar Corporation August 2016 Rev. A1 Page 7
IX. 5BMechanical Specifications
The FTL4C3QE2C mechanical specifications are compliant to the QSFP+ MSA transceiver
module specifications.
Figure 2 – FTL4C3QE2C mechanical drawing.
Figure 3 – FTL4C3QE2C Product Label (not to scale)
FTL4C3QE2C Product Specification
Finisar Corporation August 2016 Rev. A1 Page 8
X. 14BReferences
1. SFF-8436 – Specification for QSFP+ Copper and Optical Transceiver, Rev 4.8,
October 2013.
2. SFF-8636 – Common Management Interface, Rev. 2.3, October 2014.
3. IEEE 802.3ba – PMD Type 40GBASE-LR4.
4. 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.
5. “Application Note AN-2038: Finisar Implementation of RoHS Compliant
Transceivers”.
6. “Application Note AN-2104: QSFP+ 40G LR4 Transceiver EEPROM Mapping,”
Rev. A, Finisar Corporation, June, 2013.
XI. 15BFor More Information
Finisar Corporation
1389 Moffett Park Drive
Sunnyvale, CA 94089-1133
Tel. 1-408-548-1000
Fax 1-408-541-6138
HUsales@finisar.comU
www.finisar.com