Finisar Corporation - Apr 2017 Rev B3 Finisar Confidential Page 1
Product Specification
25.78Gb/s 10GE RoHS Compliant Short Wavelength SFP+
Transceiver
FTLF8536P4BCV
PRODUCT FEATURES
Up to 25.78 Gb/s bi-directional
data links
Hot-pluggable SFP+ footprint
Built-in digital diagnostic functions
850nm Oxide VCSEL laser transmitter
Duplex LC connector
RoHS compliant
100m over M5F MMF (50/125 um OM4)
70m over M5E MMF (50/125um OM3)
20m on MMF (50/125m OM2)
Metal enclosure, for lower EMI
1.2W maximum power consumption
Single 3.3V power supply
Operating temperature range:
0°C to 70°C
APPLICATIONS
25GE SR and 10GE SR Lite
100G SR4 fan out to 4x25GE SR
eCPRI
Finisar’s FTLF8536P4BCV SFP+ transceivers are designed for use in 25Gb/s data rate
over multimode fiber. They are compliant to IEEE802.3by, SFF-8472 Rev 12.2b and
SFF-8402g, and compatible with SFF-8432a and applicable portions of SFF-8431 Rev.
4.1c. The transceiver is RoHS compliant and per Directive 2011/65/EUd . See Finisar
Application Note AN-2038 for more details.
PRODUCT SELECTION
FTLF8536P4BCV
FTLF8536P4BCV Product Specification
Finisar Corporation - Apr 2017 Rev B3 Finisar Confidential Page 2
I. Pin Descriptions
Pin Symbol Name/Description Ref.
1 V
EET
Transmitter Ground (Common with Receiver Ground) 1
2 T
FAULT
Transmitter Fault. 2
3 T
DIS
Transmitt er Disabl e. Laser output disabled on high or ope n. 3
4 SDA 2-wire Serial Interface Data Line (MOD-DEF2) 4
5 SCA 2-wire Serial Interface Clock (MOD-DEF1) 4
6 MOD_ABS Module Absent, connected to V
EET
or V
EER
4
7 RS0 Rx Rate Select:
Open or Low =
High =
10.3 Gb/s Ethernet (Low Bandwidth)
25.78 Gb/s Ethernet (High Bandwidth)
5
8 LOS Loss of Signal indication. Logic 0 indicates normal operation. 6
9 RS1
Rx Rate Select:
Open or Low =
High =
10.3 Gb/s Ethernet (Low Bandwidth)
25.78 Gb/s Ethernet (High Bandwidth)
5
10 V
EER
Receiver Ground (Common with Transmitter Ground) 1
11 V
EER
Receiver Ground (Common with Transmitter Ground) 1
12 RD-
Receiver Inverted DATA out. AC Coupled
13 RD+ Receiver Non-inverted DATA out. AC Coupled
14 V
EER
Receiver Ground (Common with Transmitter Ground) 1
15 V
CCR
Receiver Power Supply
16 V
CCT
Transmitter Power Supply
17 V
EET
Transmitter Ground (Common with Receiver Ground) 1
18 TD+ Transmitter Non-Inverted DATA in. AC Coupled.
19 TD-
Transmitter Inverted DATA in. AC Coupled.
20 V
EET
Transmitter Ground (Common with Receiver Ground) 1
Notes:
1. Circuit ground is internally isolated from chassis ground.
2. T
FAULT
is an open collector/drain output, which should be pulled up with a 4.7k – 10k Ohms resistor on
the host board if intended for use. Pull up voltage should be between 2.0V to Vcc + 0.3V. A high
output indicates a transmitter fault caused by either the TX bias current or the TX output power
exceeding the preset alarm thresholds. A low output indicates normal operation. In the low state, the
output is pulled to <0.8V.
3. Laser output disabled on T
DIS
>2.0V or open, enabled on T
DIS
<0.8V.
4. Should be pul led up with 4.7 k – 10 k ohms on host board t o a volta ge between 2.0V and 3 .6 V.
MOD_ABS pulls line low to indicate module is plugged in.
5. Rate select can also be set through the 2-wire bus in accordance with SFF-8472 v. 12.1
c
. Rx Rate
Select is set at Bit 3, Byte 110, Address A2h. Tx Rate Select is set at Bit 3, Byte 1 18 , Address A2h.
Note: writing a “1” selects maximum bandwidth operation. Rate select is the logic OR of the input
state of Rate Select Pin and 2-wire bus.
6. 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.
FTLF8536P4BCV Product Specification
Finisar Corporation - Apr 2017 Rev B3 Finisar Confidential Page 3
Diagram of Host Board Connector Block Pin Numbers and Names
VeeT
VeeT
VeeR
VeeR
TD-
TD+
RD+
RD-
VccT
VccR
VeeT
VeeR
TXFault
MOD-DEF(2)
MOD-DEF(1)
MOD-DEF(0)
Rate Select
LOS
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Towards
ASIC
Towards
Bezel
TX Disable
VeeR
FTLF8536P4BCV Product Specification
Finisar Corporation - Apr 2017 Rev B3 Finisar Confidential Page 4
II. Absolute Maximum Ratings
Parameter Symbol Min Typ Max Unit Ref.
Maximum Supply Voltage Vcc -0.5 4.0 V
Storage Temperature T
S
-40 85 C
Case Operating Temperature T
C
0 70
C
Relative Humidity (Non-co ndensing) RH 0 85 % 1
Notes:
1. Non Condensing
III. Electrical Characteristics
(T
A
, V
CC
= 3.15 to 3.46 Volts)
Parameter Symbol Min Typ Max Unit Ref.
Supply Voltage Vcc 3.15 3.46 V
Supply Current Icc 290 mA 1
Transmitter
Input differential impedance R
in
100 2
Single-ended data input swing Vin,pp
125 450 mV 3
Inner Eye Height EH6 95 mV
Transmit Disable Voltage V
D
2 Vcc V 4
Transmit Enable Voltage V
EN
Vee Vee+0.8 V
Receiver
Single ended data output swing Vout,pp
185 425 mV 5
LOS Fault V
LOS fault
2 Vcc
HOST
V 6
LOS Normal V
LOS norm
Vee Vee+0.8 V 6
Power Supply Rejection PSR
100 mVpp 7
Notes:
1. With established link. The total power dissipation could exceed 1W when the module is trying to
establish link at operating case temperature below 25
o
C
2. Connected directly to TX data input pins. AC coupling from pins in to laser driver IC.
3. The minimum value re presents the minimum outer eye amplitude.
4. Or open circuit.
5. Into 100 ohms differential termination.
6. LOS is an open collector output. Should be pulled up with 4.7k – 10kohms on the host board. Normal
operation is logic 0; loss of signal is logic 1. Maximum pull-up voltage is 5.5V.
7. Receiver sensitivity is compliant with power supply sinusoidal modulation of 20 Hz to 1.5 MHz up to
specified value applied thro ugh the recommended power supply filtering network.
FTLF8536P4BCV Product Specification
Finisar Corporation - Apr 2017 Rev B3 Finisar Confidential Page 5
IV. Optical Characteristics
(T
A
, V
CC
= 3. 15 to 3.46 Volts)
Parameter Symbol Min Typ Max Unit Ref.
Transmitter
Avergare Output Power: 50 or 62.5 MMF P
OUT
-8.4 2.4 dBm 1
Optical Wavele ngth
840 860
nm
Spectral Width (RMS)
0.60
nm
Optical Modulation Amplitude
25.78Gb/s
10.3Gb/s
OMA
-6.4
-5.2
3 dBm
Transmitter Dispersion Penalty @ 10.3Gb/s TDP 3.9
dB
Transmitter and Dispersion Eye Closure @25.7Gb/s TDEC 4.3
dB
Relative Intensity Noise RIN -128 dB/Hz
Extinction Ratio @25.78Gb/s ER 2
Receiver
Stressed Receiver OMA Sensitivity
25.78Gb/s
10.3Gb/s
RxSENS
-5.2
-7.5
dBm
Unstressed Receiver OMA Sensitivity
@10.3Gb/s Rx
SENS
-10.1
dBm 2
Average Receiver Power @25.78Gb/s Rx
MAX
-10.3 3 dBm 3
Optical Center Wavelength
C
840 860
nm
Optical Return Loss 12 dB
LOS De-Assert LOS
D
-13 dBm
LOS Assert LOS
A
-30 dBm
LOS Hysteresis 0.5 dB
Notes:
1. Class 1 Laser Safety limit per FDA/CDRH, and EN (IEC) 60825 laser safety standards.
2. 100m OM3
3. Informative Only
FTLF8536P4BCV Product Specification
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IV. General Specifications
Parameter Symbol Min Typ Max Units Ref.
Data Rate BR 25.78
10.3 Gb/sec
Bit Error Rate BER 5E(-5)
10
-12
1
2
Fiber Length on 50/125
m high-
bandwidth (OM3/M5E) MMF L 70
m
Fiber Length on 50/125
m high-
bandwidth (OM4/M5F) MMF L 100 m
Notes:
1. At 25.78Gb/s Ethernet data rate (IEEE 802.3by)
2. At 10.3Gb/s Ethernet data rate
VI. Environmental Specifications
Parameter Symbol Min Typ Max Units Ref.
Case Operating Temperature T
op
0 70 °C
Storage Temperature T
sto
-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 m eet the Class 1 ey e safety requirem ents
of EN (IEC) 60825 and the electrical safety requirements of
EN (IEC) 60950. Copies of certificates are available at Finisar Corporation upon request.
.
FTLF8536P4BCV Product Specification
Finisar Corporation - Apr 2017 Rev B3 Finisar Confidential Page 7
VIII. Digital Diagnostic Functions
Finisar FTLF8536P4BCV SFP+ transceivers support the 2-wire serial communication protocol as
defined in the SFP MSA
f
. It is very closely related to the E
2
PROM defined in the GBIC standard, with
the same electrical specifications.
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 enhanced digital diagnostic monitoring interface,
which allows real-time access to device operating parameters such as transceiver temperature, laser
bias current, transmitted optica l power, received optical power and transc eiver 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 E
2
PROM 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 AN-2030: “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 si gnal (SCL, Mod Def 1) is generated
by the host. The positive edge clocks data into the SFP transceiver into those segments of the E
2
PROM
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 documentation
c,f
and Finisar Application Note AN-
2030.
TX Equalization Control @ 25G
Tx input equalization control can be accessed through 2-wire serial interface at by te address
114 (A2h). Tx input equalization control for 25GE is located at the upper 4 bits of byte 114
(A2h) while the lower 4 bits are reserved for rate low in the case of dual rate application.
RX Emphasis Control @ 25G
Rx output emphasis control can be accessed through 2-wire serial interface at byte address 115
(A2h). Rx output emphasis control for 25GE is located at the upper 4 bits of byte 115 (A2h)
while the lower 4 bits are reserved for rate low in the case of dual rate application.
FTLF8536P4BCV Product Specification
Finisar Corporation - Apr 2017 Rev B3 Finisar Confidential Page 8
IX. Digital Diagnostic Specifications
FTLF8536P4BCV transceivers can be used in host systems that require either internally
or externally calibrated digital diagnostics.
ParameterSymbol Units Min MaxAccuracy Ref.
Transceiver temperature D
DDTemp
ºC 0 +70 ±5ºC
Transceiver supply voltage D
DDVoltage
V 3.14 3.45 ±3%
Transmitter bias current D
DDBias
mA 0 20 ±10% 1
Transmitter output power D
DDTx-Power
dBm -9 +2.4 ±3dB
Receiver average optical input power D
DDRx-Power
dBm -11 +2.4 ±3dB
Notes:
1. Accuracy of Measured Tx Bias Current is 10% of the actual Bias Current from the laser driver to the
laser.
FTLF8536P4BCV Product Specification
Finisar Corporation - Apr 2017 Rev B3 Finisar Confidential Page 9
X. Mechanical Specifications
Finisar’s FTLF8536P4BCV SFP+ transceivers are compatible with the SFF-8432
b
specification for improved pluggable form factor.
FTLF8536P4BCV
FTLF8536P4BCV Product Specification
Finisar Corporation - Apr 2017 Rev B3 Finisar Confidential Page 10
XI. PCB Layout and Be zel Recommendations
FTLF8536P4BCV Product Specification
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FTLF8536P4BCV Product Specification
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XII. References
a. “Improved Pluggable Form Factor”, SFF Document Number SFF-8432, Revision
5.0, July 16, 2007.
b. “Digital Monitoring Interface for Optical Transceivers”, SFF Document Number
SFF-8472, Revision 12.2.
c. “Enhanced Small Form Factor Pluggable Module ‘SFP+ ‘”, SFF Document
Number SFF-8431, Revision 4.1, July 6, 2009; Addendum Jun 21, 2013.
d. 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”. 08-June 2011, which supercedes the previous ROHS
Directive 2002/95/EC.
e. Small Form Factor Pluggable (SFP) Transceiver Multi-source Agreement (MSA),
September 14, 2000 which is available as SFF Document Number INF-8074,
Revision 1.0 May 12, 2001
f. “0.8mm Card Edge Connector for 16Gb/s Applications”, SFF Document Number
SFF-8081, Revision 0.2, December 21, 2009.
g. SFF-8402, Revision 0.2
XIII. 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
