Product Specification
+1600 ps/nm (80km) E-temp Tunable XFP Optical Transceiver
FTLX6824MNC
PRODUCT FEATURES
•
Supports 8.5Gb/s to 11.35Gb/s
•
-300 to +1600 ps/nm Dispersion
Tolerance
•
Supports 50GHz ITU-based
channel spacing (C-Band) with a
wavelength locker
•
Monolithic MZM Tunable TOSA
•
Temperature range: -5°C to 85°C
•
RoHS-6 Compliant (lead-free)
•
Power dissipation <4.5W:
•
Built-in digital diagnostic functions
•
High performance APD Receiver
•
Adjustable receiver threshold with
option for automatic optimization
through FEC feedback
APPLICATIONS
•
DWDM 10Gb/s SONET/SDH
•
DWDM 10Gb/s Ethernet & 10Gb/s
Fibre Channel
•
DWDM 10Gb/s SONET/SDH w/FEC
•
DWDM 10Gb/s Ethernet and 10Gb/s
Fibre Channel w/FEC
The FTLX6824MNC Small Form Factor 10Gb/s (XFP) transceiver is Finisar’s next
generation T-XFP design which supports the E-temp operating range and it complies with
the XFP Multi-Source Agreement (MSA) Specification1 while supporting advanced
performance enhancements. It supports amplified DWDM 10Gb/s SONET/SDH, 10
Gigabit Ethernet, and 10 Gigabit Fibre Channel applications over 80km of fiber without
dispersion compensation. Digital diagnostics functions are available via a 2-wire serial
interface, as specified in the XFP MSA. The optical transceiver is compliant per the
RoHS Directive 2011/65/EU3. See Finisar Application Note AN-2038 for more details4.
PRODUCT SELECTION:
FTLX6824MNC – Gen2 E-temp T-XFP
 Finisar Corporation August 2015
Rev. B1
Page 1
FTLX6824MNC Product Specification
I.
Pin Descriptions
Pin
1
2
3
Logic
LVTTL-I
4
LVTTL-O
5
6
7
8
9
10
11
LVTTL-I
Symbol
GND
VEE5
Mod-Desel
Interrupt
TX_DIS
VCC5
GND
VCC3
VCC3
SCL
SDA
12
LVTTL-I
LVTTLI/O
LVTTL-O
Mod_Abs
13
LVTTL-O
Mod_NR
14
15
16
17
18
19
20
21
LVTTL-O
RX_LOS
GND
GND
RDRD+
GND
VCC2
P_Down/RST
22
23
24
25
26
27
28
29
30
CML-O
CML-O
LVTTL-I
PECL-I
PECL-I
CML-I
CML-I
VCC2
GND
RefCLK+
RefCLKGND
GND
TDTD+
GND
Name/Description
Module Ground
Optional –5.2 Power Supply – Not used
Module De-select; When held low allows the module to
respond to 2-wire serial interface commands
Interrupt (bar); Indicates presence of an important condition
which can be read over the serial 2-wire interface
Transmitter Disable; Transmitter laser source turned off
+5 Power Supply
Module Ground
+3.3V Power Supply
+3.3V Power Supply
Serial 2-wire interface clock
Serial 2-wire interface data line
Ref.
1
Module Absent; Indicates module is not present. Grounded
in the module.
Module Not Ready; Finisar defines it as a logical OR
between RX_LOS and Loss of Lock in TX/RX.
Receiver Loss of Signal indicator
Module Ground
Module Ground
Receiver inverted data output
Receiver non-inverted data output
Module Ground
+1.8V Power Supply – Not used
Power Down; When high, places the module in the low
power stand-by mode and on the falling edge of P_Down
initiates a module reset
Reset; The falling edge initiates a complete reset of the
module including the 2-wire serial interface, equivalent to a
power cycle.
+1.8V Power Supply – Not used
Module Ground
Not Required
Not Required
Module Ground
Module Ground
Transmitter inverted data input
Transmitter non-inverted data input
Module Ground
2
2
1
2
2
2
2
1
1
1
1
1
1
1
Notes:
1. Module circuit ground is isolated from module chassis ground within the module.
2. Open collector; should be pulled up with 4.7k – 10kohms on host board to a voltage between 3.15V
and 3.6V.
 Finisar Corporation August 2015
Rev. B1
Page 2
FTLX6824MNC Product Specification
Diagram of Host Board Connector Block Pin Numbers and Names
II.
Absolute Maximum Ratings
Parameter
Maximum Supply Voltage #1
Maximum Supply Voltage #2
Storage Temperature
Case Operating Temperature
Receiver Damage Threshold
(Steady-state as well as transient)
 Finisar Corporation August 2015
Symbol
Vcc3
Vcc2
TS
T OP
P Rdmg
Min
-0.5
-0.5
-40
-5
+3
Max
4.0
6.0
85
+85
Rev. B1
Unit
V
V
°C
°C
dBm
Ref.
Page 3
FTLX6824MNC Product Specification
III.
Electrical Characteristics (EOL, Over Temperature and Wavelength Range)
Parameter
Supply Voltage #1
Supply Voltage #2
Supply Current – Vcc5 supply
Supply Current – Vcc3 supply
Module total power dissipation
Transmitter
Input differential impedance
Differential data input swing
Transmit Disable Voltage
Transmit Enable Voltage
Receiver
Differential data output swing
Data output rise time
Data output fall time
LOS Fault
LOS Normal
Power Supply Rejection
Reference Clock (AC-Coupled)
Single-ended peak to peak voltage
swing
Single-ended resistance
Frequency clock tolerance
Duty cycle
Symbol
Vcc3
Vcc5
Icc5
Icc3
P
R in
Vin,pp
VD
V EN
Vout,pp
tr
tf
V LOS fault
V LOS norm
PSR
FTLX6824MNC
Min
Typ
3.13
4.75
Max
3.46
5.25
650
750
4.5
Unit
V
V
mA
mA
W
Ω
mV
V
V
2
820
Vcc
GND+ 0.8
mV
ps
ps
V
V
4
5
5
6
6
7
100
120
2.0
GND
500
Vcc – 0.5
GND
V SEPP
200
RL
Δf
-
40
-100
40
850
40
40
Vcc HOST
GND+0.5
See Note 7 below
50
900
mV
60
+100
60
ppm
%
Ref.
3
Notes:
1. Maximum total power value is specified across the full temperature and voltage range.
2. After internal AC coupling.
3. Or open circuit.
4. Into 100 ohms differential termination.
5. 20 – 80 %
6. Loss Of Signal is open collector to be pulled up with a 4.7k – 10kohm resistor to 3.15 – 3.6V. Logic 0
indicates normal operation; logic 1 indicates no signal detected.
7. Per Section 2.7.1. in the XFP MSA Specification1.
 Finisar Corporation August 2015
Rev. B1
Page 4
FTLX6824MNC Product Specification
IV.
Optical Characteristics (EOL, Over Temperature and Wavelength Range)
FTLX6824MNC
Transmitter
Parameter
Output Opt. Pwr: 9/125 SMF
Output Opt. Pwr during tuning
Optical Extinction Ratio
Wavelength range (ITU Grid)
Crossing Ratio
Center Wavelength Spacing
Transmitter Center
Wavelength – End Of Life
Side Mode Suppression Ratio
Wavelength tuning (Cold
Start)
Wavelength tuning (Warm)
Tx Jitter (SONET) 20kHz80MHz
Tx Jitter (SONET) 4MHz –
80MHz
Relative Intensity Noise
SBS threshold (1% of launch
power reflected) – with Dither
On
Receiver
Overload
Optical Center Wavelength
Receiver Reflectance
LOS De-Assert
LOS Assert
LOS Hysteresis
Symbol
Min
Typ
Max
P OUT
-1
+3
P TUNE
-35
ER
9
Λ
1528.77
1563.86
40
Ref
191.70THz to 196.10THz
(89 channels)
λc +2.5
%
GHz
GHz
30
dB
s
Tx j1
2
0.3
s
UI
3
Tx j2
0.1
UI
4
-135
dB/Hz
dBm
Default is Dither OFF
Λc
λc -2.5
SMSR
35
60
Unit
dBm
dBm
dB
nm
50
λc
0.5
RIN
+16
P MAX
λC
R rx
LOS D
LOS A
 Finisar Corporation August 2015
-6
1270
1615
-27
-30
-37
0.5
Rev. B1
1
2
dBm
nm
dB
dBm
dBm
dB
Page 5
FTLX6824MNC Product Specification
FTLX6824MNC
Receiver Sensitivity
5
Data rate
(Gb/s)
BER
Dispersion (ps/nm)
Sensitivity through Fiber
at OSNR >30dB (dBm)
Threshold
Adjust
Required
10.7
1E-4
-300 to 1600
-25.5
Yes
Data rate
(Gb/s)
BER
Dispersion (ps/nm)
Sensitivity back-toback at OSNR>30dB
(dBm)
Dispersion Penalty
at OSNR>30dB
(dB)
Threshold
Adjust
Required
-300 to 1450
-300 to 1450
-300 to 1450
-300 to 1450
-300 to 1450
-24
-24
-28
-28
-27
2
2
2.5
3
3
No
No
Yes
Yes
Yes
9.95
1e-12
10.3
1e-12
10.7
1e-4
11.1
1e-4
11.3
1e-4
OSNR
Performance6
Data rate
(Gb/s)
BER
Dispersion (ps/nm)
Min OSNR Back-toback at Power:
-18 to -7dBm (dB)
Max OSNR Penalty
at Power:
-18 to -7dBm (dB)
Threshold
Adjust
Required
9.95
10.3
10.7
11.1
11.3
1e-12
1e-12
1e-4
1e-4
1e-4
-300 to 1450
-300 to 1450
-300 to 1450
-300 to 1450
-300 to 1450
22
22
14.5
14.5
15
3
3
3
3
3
Yes
Yes
Yes
Yes
Yes
Notes:
1. Corresponds to approximately 0.4 nm.
2. λc = Specified ITU Grid wavelength. Wavelength stability is achieved within 30 seconds of power up.
3. Measured with a host jitter of 50 mUI peak-to-peak.
4. Measured with a host jitter of 7 mUI RMS.
5. Measured at 1528-1600nm with worst ER; PRBS31.
6. All OSNR measurements are performed with 0.1nm resolution.
 Finisar Corporation August 2015
Rev. B1
Page 6
FTLX6824MNC Product Specification
V.
Additional Specifications and Response Timing
Parameter
Bit Rate
Maximum Supported Link Length
PMD Penalty (30ps of DGD)
Symbol
BR
L MAX
Min
8.5
Typ
Max
11.35
80
1
Units
Gb/s
km
dB
Ref.
1
2
Notes:
1. Amplified SONET OC-192, 10G Ethernet, SONET OC-192 with FEC, 10G Ethernet with FEC, 10G
Fibre Channel with FEC.
2. Distance indicates dispersion budget. Optical amplification may be required to achieve maximum
distance.
Transmitter Power Monitor Accuracy
Initial accuracy at 25C:
Relative accuracy over temperature, voltage and aging:
+/- 1.5dB.
+/- 2dB.
Received Optical Power Monitor Accuracy (applicable measurement range defined from
-24dBm to -6dBm)
Initial accuracy at 25C:
+/- 1.5dB.
Relative accuracy over temperature, voltage and aging:
+/- 2dB.
Response timing:
Parameter
Min
Tx_Dis
Assert
De-assert
Asset
De-assert
Asset
De-assert
Asset
De-assert
Rx_LOS
Mod_NR
Interrupt
P_Down/RST Time
P_Down/RST Asser Delay
Start-up time (Initialize time)
1.
VI.
Typ
Max
10
2
100
100
1
1
200
500
10
100
300
Units
us
ms
us
us
ms
ms
ms
us
us
us
ms
Ref.
1
Time required for transponder to be ready to begin I2C communication with host from a cold start
or a hardware reset condition.
Environmental Specifications
Finisar FTLX6824MNC transceivers have an operating temperature from -5°C to +85°C
case temperature.
Parameter
Case Operating Temperature
Storage Temperature
Symbol Min Max Units
T op
-5
85
°C
T sto
-40
85
°C
 Finisar Corporation August 2015
Rev. B1
Ref.
Page 7
FTLX6824MNC Product Specification
VII.
Regulatory Compliance
Finisar Tunable XFP transceivers are Class 1 Laser Products and are certified per the
following standards:
Feature
Agency
Standard
Laser Eye
Safety
Laser Eye
Safety
FDA/CDRH
CDRH 21 CFR 1040 and Laser Notice 50
TÜV
Electrical
Safety
Electrical
Safety
TÜV
EN 60825-1: 1994+A11:1996+A2:2001
IEC 60825-1: 1993+A1:1997+A2:2001
IEC 60825-2: 2000, Edition 2
EN 60950
UL/CSA
CLASS 3862.07
CLASS 3862.87
Certificate
Number
Available upon
request
Available upon
request
Available upon
request
Available upon
request
Copies of the referenced certificates are available at Finisar Corporation upon request.
 Finisar Corporation August 2015
Rev. B1
Page 8
FTLX6824MNC Product Specification
VIII. Digital Diagnostics Functions
As defined by the XFP MSA1, Finisar XFP transceivers provide digital diagnostic
functions via a 2-wire serial interface, which allows real-time access to the following
operating parameters:
•
•
•
•
•
•
Transceiver temperature
Laser bias current
Transmitted optical power
Received optical power
Transceiver supply voltage
TEC Temperature
It also provides a sophisticated system of alarm and warning flags, which may be used to
alert end-users when particular operating parameters are outside of a factory-set normal
range.
The operating and diagnostics information is monitored and reported by a Digital
Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed
through the 2-wire serial interface. When the serial protocol is activated, the serial clock
signal (SCL pin) is generated by the host. The positive edge clocks data into the XFP
transceiver into those segments of its memory map that are not write-protected. The
negative edge clocks data from the XFP transceiver. The serial data signal (SDA pin) 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. The 2-wire
serial interface provides sequential or random access to the 8 bit parameters, addressed
from 000h to the maximum address of the memory.
For more detailed information, including memory map definitions, please see the XFP
MSA documentation1.
Receiver Threshold Adjustment
The FTLX6824MNC modules also provide access to receiver decision threshold
adjustment via 2-wire serial interface, in order to improve receiver OSNR performance
based on specific link conditions. It is implemented as follows:
•
•
•
Rx Threshold of XFP transceivers will be factory-set for optimized performance
in non-FEC applications. This will be the default value during both cold start
(power-up) and warm start (module reset).
The transceiver supports adjustment of Rx Threshold value by the host through
register 76d, table 01h. This is intended to be used in FEC applications.
Register 76d, table 01h is a volatile memory. Therefore if the transceiver is
power-cycled, the register starts up with a value of 00h which corresponds to the
default Rx Threshold value.
 Finisar Corporation August 2015
Rev. B1
Page 9
FTLX6824MNC Product Specification
•
•
The threshold adjustment input value is 2’s complement 7 bit value (-128 to
+127), with 0 corresponding to default Rx threshold value. Full range of
adjustment provides at least a ±10% change in Rx threshold from the default
value.
An increase in RxDTV value sets the threshold closer to the “1” value of the eye.
The Default setting is the factory tuned optimized set point and is not necessarily
the 50% RxDTV value.
Logical “1”
Max
50%
Min
Logical “0”
RxDTV
SBS suppression, dither tone
Set Address 111, bit 1 (Table A0h) to “0” to enable tone, “1” to disable dither tone
(defaults: frequency = 40kHz , tone is disabled). Please contact your Finisar RSM or
PLM if specific amplitudes and frequencies are needed for SBS suppression.
Tuning Management Interface for ITU Frequency Grid Applications
Implementation of wavelength or frequency tuning is indicated in Serial ID Byte 221
(Table 01h) bit 1.
Data Address
221 (Table 01h)
Bit
1
Description
Wavelength or frequency tunability implemented
The Finisar tunable XFP supports both wavelength and frequency tuning (as specified in
INF-8077i), the wavelength tuning support is indicated by the transceiver description
encoded in Serial ID Byte 138 bits 2 and 3.
Address
138
138
138
Bit
3
2
1-0
Description of transceiver
Tunable DWDM (selection by channel number, bytes 112-113)
Tunable DWDM (selection in 50 pm steps, bytes 72-73)
Reserved
 Finisar Corporation August 2015
Rev. B1
Page 10
FTLX6824MNC Product Specification
Upon a power up, the module will go to a default wavelength (Finisar default channel is
1549.716nm) or the last channel set by the host. If Tx_DIS is asserted upon power up, the
laser will be disabled and the set wavelength will be cleared. Once the Tx_DIS is deasserted, the firmware will maintain the laser in an off state until the host sets the desired
ITU channel. If the module is powered-down before the ITU channel was set and
TX_DIS de-asserted, the module will re-start at the default channel. See the following
startup channel flowchart.
Flow Chart of Startup Channel
A desired wavelength can be commanded by the user by writing into Bytes 72 (MSB)
and 73 (LSB). Wavelength control command:
Address
72 (MSB) & 73
(LSB)
74 (MSB) & 75
(LSB)
Bit
All
Name
Wavelength Set
All
Wavelength
Error
Description
User input of Wavelength set point (in
units of 50 pm)
Monitor of Current Wavelength Error (in
units of 5 pm)
Thus for instance a target wavelength of 1556.55 nm would correspond to 79h (MSB)
written to Byte address 72 and 9Bh (LSB) written to Byte address 73. Alternatively a
desired frequency channel can be commanded by the user by writing into Bytes 112
(MSB) and 113 (LSB).
 Finisar Corporation August 2015
Rev. B1
Page 11
FTLX6824MNC Product Specification
Address
112 (MSB) &
113 (LSB)
Bit
All
Name
Channel
Number Set
Description
User input of channel number, which is an
integer 1 to N (N=Number of Channels)
114 (MSB) &
115 (LSB)
116-117
All
Frequency
Error
Reserved
Frequency error reported in 16 bit
signed integer with LSB=0.1 GHz
Reserved
All
The channel number is derived from the following equation using parameters found in
Module capabilities as listed in Byte Addresses 60-69:
Channel number = 1 + (Desired Frequency – First Frequency) / Grid Spacing
Alarm and Warning Threshold Values
Address
Parameter
02-03
04-05
06-07
08-09
10-17
18-19
20-21
22-23
24-25
26-27
28-29
30-31
32-33
34-35
36-37
38-39
40-41
42-43
44-45
46-47
48-49
50-51
52-53
54-55
56-57
Temp High Alarm
Temp Low Alarm
Temp High Warning
Temp Low Warning
Reserved
Bias High Alarm
Bias Low Alarm
Bias High Warning
Bias Low Warning
TX Power High Alarm
TX Power Low Alarm
TX Power High Warning
TX Power Low Warning
RX Power High Alarm
RX Power Low Alarm
RX Power High Warning
RX Power Low Warning
AUX 1 High Alarm
AUX 1 Low Alarm
AUX 1 High Warning
AUX 1 Low Warning
AUX 2 High Alarm
AUX 2 Low Alarm
AUX 2 High Warning
AUX 2 Low Warning
 Finisar Corporation August 2015
Rev. B1
Threshold
Values
90
-13
88
-8
UNITS
120
5
110
10
+5
-3
+4
-2
-4
-31
-5
-25
57
20
54
25
3.564
3.036
3.465
3.135
mA
mA
mA
mA
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
C
C
C
C
V
V
V
V
C
C
C
C
Page 12
FTLX6824MNC Product Specification
A/D Table
Address
96-97
Parameter
Module Case Temp
Accuracy
+/-3
Resolution
+/- 0.1
Units
degC
98-99
100-101
102-103
104-105
106-107
108-109
Reserved
TX bias current
Transmit Power
Receive Power
Auxiliary monitor1
Auxiliary monitor2
+/-8
+/-1.5 dB
+/-1.5 dB
+/-3
+/-3
+/-2
0.1
+/-0.1
+/-0.1
+/-100
uA
uW
uW
degC
uV
IX.
Notes
PCB mounted
thermocouple
Laser Temperature
3.3V Supply Voltage
Mechanical Specifications
Finisar’s XFP transceivers are compliant with the dimensions defined by the XFP MultiSourcing Agreement (MSA).
XFP Transceiver (dimensions are in mm)
 Finisar Corporation August 2015
Rev. B1
Page 13
FTLX6824MNC Product Specification
X.
PCB Layout and Bezel Recommendations
XFP Host Board Mechanical Layout (dimensions are in mm)
 Finisar Corporation August 2015
Rev. B1
Page 14
FTLX6824MNC Product Specification
XFP Detail Host Board Mechanical Layout (dimensions are in mm)
XFP Recommended Bezel Design (dimensions are in mm)
 Finisar Corporation August 2015
Rev. B1
Page 15
FTLX6824MNC Product Specification
XI. Notes & Exceptions
•
XFI and Line Loopback operation:
o When XFI Loopback is enabled, the Transmitter output is disabled.
o When Line Loopback is enabled, the CDR output is disabled.
•
8.5Gb/s operation requires configuration change via I2C vendor reserved
command.
XII.
References
1.
10 Gigabit Small Form Factor Pluggable Module (XFP) Multi-Source Agreement
(MSA), Rev 4.5 – August 2005. Documentation is currently available
at http://www.xfpmsa.org/
2.
Application Note AN-2035: “Digital Diagnostic Monitoring Interface for XFP
Optical Transceivers” – Finisar Corporation, December 2003
3.
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.
4.
“Application Note AN-2038: Finisar Implementation of RoHS Compliant
Transceivers”.
5.
SFF-8477 Revision 1.3: “Specification for Tunable XFP for ITU Frequency Grid
Applications”. October 20th, 2008. Documentation is currently available at
ftp://ftp.seagate.com/sff
XIII. Product Selection Details
FTLX6824MNC-xx
FT: FT Series
L: RoHS-6
X: 10G Bit Rate Class
68: 80km (asymmetric chirp) widely tunable with APD Receiver
2: Gen2 T-XFP
4: 4: High Performance
M: Multiprotocol, 8.5Gb/s supported with I2C command
N: Extended temperature range
C: ITU-T C-Band 50GHz spacing
xx: Customer Specific
 Finisar Corporation August 2015
Rev. B1
Page 16
FTLX6824MNC Product Specification
XIV. Revision History
Revision
Date
A00
June 2014
B1
August 2015
XV.
Description
Initial Release
Updated logo and RoHS statement
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 August 2015
Rev. B1
Page 17