F
ast Ethernet 100BASE-LX10 SFP Single
Mode Transceivers with Digital Diagnostics
TRXAFELX
Product Description
The TRXAFELX SFP series of fiber optic transceivers provide a quick and
reliable interface for 100BASE-LX10 Fast Ethernet single mode applica-
tions. The transceivers are compliant with IEEE802.3ah/D3.3 standard.
The diagnostic functions, alarm and warning features as described in
the Multi-Source Agreement (MSA) document, SFF-8472 (Rev. 9.4), are
provided via an I
2
C serial interface. All transceiver modules satisfy Class
I Laser Safety requirements in accordance with the U.S. FDA/CDRH and
international IEC-60825 standards.
The transceivers connect to standard 20-pad SFP connectors for hot plug
capability. This allows the system designer to make configuration chang-
es or maintenance by simply plugging in different types of transceivers
without removing the power supply from the host system.
The transceivers have bail-type latches, which offer an easy and conve-
nient way to release the modules. The latch is compliant with the SFP
MSA.
The transmitter incorporates a highly reliable 1310nm InGaAsP laser
and an integrated driver circuit. The receiver features a transimpedance
amplifier IC optimized for high sensitivity and wide dynamic range. The
transmitter and receiver DATA interfaces are AC-coupled internally. LV-
TTL Transmitter Disable control input and Loss of Signal (LOS) output in-
terfaces are also provided.
The transceivers operate from a single +3.3V power supply over three
operating case temperature ranges of -5°C to +70°C (“B” option), -5°C to
+85°C (“E” option), or -40°C to +85°C (“A” option). The housing is made of
plastic and metal for EMI immunity.
Features
Lead Free Design & Fully RoHS Compliant
Compliant with IEEE 802.3ah/D3.3 (100BASE-LX10)
Compatible with SFP MSA
Digital Diagnostics through Serial Interface
Internal Calibration for Digital Diagnostics
1310nm Fabry Perot Laser Transmitter
Distances up to 10km
Eye Safe (Class I Laser Safety)
Duplex LC Optical Interface
Hot-pluggable
TX Fault & Loss of Signal Outputs
TX Disable Input
Single +3.3V Power Supply
Absolute Maximum Ratings
Parameter
Storage Temperature
Operating Case
Temperature
1
Supply Voltage
Input Voltage
Lead Terminal Finish, Reflow Profile Limits and MSL
1
Symbol
T
st
“B” option
“E” option
“A” option
V
cc
V
in
-
T
op
Minimum
- 40
-5
-5
- 40
0
0
-
Maximum
+ 85
+ 70
+ 85
+ 85
+ 4.5
V
cc
NA
Units
°C
°C
V
V
-
Measured on top side of SFP module at the front center vent hole of the cage.
An Oplink Company
RevA-P.2009.04.01
TRXAFELX
Transmitter Performance Characteristics
(Over Operating Case Temperature,
V
CC
= 3.13 to 3.47V)
All parameters guaranteed only at typical data rate
Parameter
Operating Data Rate
1
Optical Output Power
2
Center Wavelength
Spectral Width (RMS)
Optical Modulation Amplitude
Extinction Ratio
Optical Output Power of OFF Transmitter
Optical Return Loss Tolerance
Transmitter Dispersion Penalty
Optical Output Eye
1
2
Symbol
B
P
O
λ
C
Δλ
RMS
OMA
P
hi
/P
lo
P
OFF
ORLT
-
Minimum
-
- 15.0
1260
-
- 14.8
5
-
-
-
Typical
125
-
-
-
-
-
-
-
-
Maximum
-
- 8.0
1360
7.7
-
-
- 45
12
4.5
Units
Mb/s
dBm
nm
nm
dBm
dB
dBm
dB
dB
Compliant with IEEE 802.3ah/D3.3
Data rate ranges from 50Mb/s to 200Mb/s. However, some degradation may be incurred in overall performance.
Measured average power coupled into single mode fiber. The minimum power specified is at Beginning-of-Life.
Receiver Performance Characteristics
(Over Operating Case Temperature,
V
CC
= 3.13 to 3.47V)
All parameters guaranteed only at typical data rate
Parameter
Operating Data Rate
1
Receiver Sensitivity (10
-12
BER)
2
Receiver Sensitivity as OMA
Maximum Input Optical Power (10
-12
BER)
2
LOS Thresholds
LOS Hysteresis
3
Wavelength of Operation
Receiver Reflectance
1
2
Symbol
B
P
min
P
OMA, min
P
max
P
los+
P
los-
-
λ
-
Minimum
-
- 25.0
- 24.8
- 8.0
-
- 45.0
0.5
1100
-
Typical
125
- 34.0
-
- 5.0
-
-
-
-
-
Maximum
-
-
-
-
- 25.0
-
-
1600
- 12
Units
Mb/s
dBm
dBm
dBm
dBm
dB
nm
dB
Increasing Light Input
Decreasing Light Input
Data rate ranges from 50Mb/s to 200Mb/s. However, some degradation may be incurred in overall performance.
Specified in average optical input power and when measured at 1310nm wavelength and 125Mb/s with optical frame based on test pattern specified
in IEEE 802.3ah. The optical source Extinction Ratio is set at optimum value duing the sensitivity test.
3
When measured at 1310nm wavelength and 125Mb/s with 2
7
-1 PRBS.
Laser Safety:
All transceivers are Class I Laser products
per FDA/CDRH and IEC-60825 standards. They must be
operated under specified operating conditions.
Oplink Communications, Inc.
DATE OF MANUFACTURE:
This product complies with
21 CFR 1040.10 and 1040.11
Meets Class I Laser Safety Requirements
Oplink Communications, Inc.
2
RevA-P.2009.04.01
TRXAFELX
Transmitter Electrical Interface
(Over Operating Case Temperature,
V
CC
= 3.13 to 3.47V)
Parameter
Input Voltage Swing (TD+ & TD-)
1
Input HIGH Voltage (TX Disable)
2
Input LOW Voltage (TX Disable)
2
Output HIGH Voltage (TX Fault)
3
Output LOW Voltage (TX Fault)
3
1
2
Symbol
V
PP-DIF
V
IH
V
IL
V
OH
V
OL
Minimum
0.25
2.0
0
2.0
0
Typical
-
-
-
-
-
Maximum
2.4
V
CC
0.8
V
CC
+ 0.3
0.8
Units
V
V
V
V
V
Differential peak-to-peak voltage.
There is an internal 4.7 to 10kΩ pull-up resistor to
VccT.
3
Open collector compatible, 4.7 to 10kΩ pull-up resistor to Vcc (Host Supply Voltage).
Receiver Electrical Interface
(Over Operating Case Temperature,
V
CC
= 3.13 to 3.47V)
Parameter
Output Voltage Swing (RD+ & RD-)
1
Output HIGH Voltage (LOS)
2
Output LOW Voltage (LOS)
2
1
2
Symbol
V
PP-DIF
V
OH
V
OL
Minimum
0.6
2.0
0
Typical
-
-
-
Maximum
2.0
V
CC
+ 0.3
0.5
Units
V
V
V
Differential peak-to-peak voltage across external 100Ω load.
Open collector compatible, 4.7 to 10kΩ pull-up resistor to
Vcc
(Host Supply Voltage).
Electrical Power Supply Characteristics
(Over Operating Case Temperature,
V
CC
= 3.13 to 3.47V)
Parameter
Supply Voltage
Supply Current
Symbol
V
CC
I
CC
Minimum
3.13
-
Typical
3.3
175
Maximum
3.47
275
Units
V
mA
Module Definition
MOD_DEF(0)
pin 6
TTL LOW
MOD_DEF(1)
pin 5
SCL
MOD_DEF(2)
pin 4
SDA
Interpretation by Host
Serial module definition protocol
Electrical Pad Layout
20
19
18
17
16
15
14
13
12
11
TX GND
TD- (TX DATA IN-)
TD+ (TX DATA IN+)
TX GND
VccTX
VccRX
RX GND
RD+ (RX DATA OUT+)
RD- (RX DATA OUT-)
RX GND
Host Board Connector Pad Layout
1
2
3
4
5
6
7
8
9
10
TX GND
TX Fault
TX Disable
MOD_DEF(2)
MOD_DEF(1)
MOD_DEF(0)
NO CONNECTION
LOS
RX GND
RX GND
1
2
3
Toward
Bezel
20
19
18
17
16
15
14
13
12
11
Toward
ASIC
4
5
6
7
8
9
10
Top of Board
Bottom of Board
(as viewed thru top of board)
Oplink Communications, Inc.
3
RevA-P.2009.04.01
TRXAFELX
Example of SFP host board schematic
1µH coil or ferrite bead
(<0.2Ω series resistance)
Vcc
3.3V
Vcc
3.3V
+
10
0.1
+
10
0.1
16
15
R
2
8
4
5
6
R
R
R
TX Fault
LOS
MOD_DEF(2)
MOD_DEF(1)
MOD_DEF(0)
(100Ω to ground internally)
RX DATA OUT+
to 50Ω load
RX DATA OUT-
to 50Ω load
+
10
0.1
TRXAFELX
3
100
18
TX Disable
50Ω line
TX DATA IN+
TX DATA IN-
50Ω line
50Ω line
13
50Ω line
19
12
1, 9, 10, 11, 14, 17, 20
R: 4.7 to 10kΩ
Application Notes
Electrical Interface:
All signal interfaces are compliant with
the SFP MSA specification. The high speed DATA interface
is differential AC-coupled internally and can be directly
connected to a 3.3V SERDES IC. All low speed control and sense
output signals are open collector TTL compatible and should
be pulled up with a 4.7 - 10kΩ resistor on the host board.
Loss of Signal (LOS):
The Loss of Signal circuit monitors the
level of the incoming optical signal and generates a logic HIGH
when an insufficient photocurrent is produced.
TX Fault:
The output indicates LOW when the transmitter
is operating normally, and HIGH with a laser fault including
laser end-of-life. TX Fault is an open collector/drain output
and should be pulled up with a 4.7 - 10kΩ resistor on the host
board. TX Fault is non-latching (automatically deasserts when
fault goes away).
TX Disable:
When the TX Disable pin is at logic HIGH, the
transmitter optical output is disabled (less than -45dBm).
Serial Identification and Monitoring:
The module definition
of SFP is indicated by the three module definition pins, MOD_
DEF(0), MOD_DEF(1) and MOD_DEF(2). Upon power up, MOD_
DEF(1:2) appear as NC (no connection), and MOD_DEF(0) is TTL
LOW. When the host system detects this condition, it activates
the serial protocol (standard two-wire I
2
C serial interface) and
generates the serial clock signal (SCL). The positive edge clocks
data into the EEPROM segments of the SFP that are not write
protected, and the negative edge clocks data from the SFP.
This device does not require clock stretching.
The serial data signal (SDA) is for serial data transfer. The
host uses SDA in conjunction with SCL to mark the start and
end of serial protocol activation. The supported monitoring
functions are temperature, voltage, bias current, transmitter
power, average receiver signal, all alarms and warnings, and
software monitoring of TX Fault/LOS. The device is internally
calibrated.
The data transfer protocol and the details of the mandatory
and vendor specific data structures are defined in the SFP MSA,
and SFF-8472, Rev. 9.4.
Power Supply and Grounding:
The power supply line should
be well-filtered. All 0.1μF power supply bypass capacitors
should be as close to the transceiver module as possible.
Oplink Communications, Inc.
4
RevA-P.2009.04.01
TRXAFELX
Package Outline
56.6
2.2 REF
13.67
13.54
.54
.53
1.02
.0
6.25±0.05
.246±.002
8.89
.4
47.35
1.86
8.51
.335
46335 Landing Pkwy Fremont, CA 94538 Tel: (510) 933-7200 Fax: (510) 933-7300 Email: Sales@Oplink.com • www.oplink.com
13.87±0.20
.546±.008
1.78
.1
41.80±0.15
1.646±.006
44.98±0.20
1.771±.008
Dimensions in inches [mm]
Default tolerances:
.xxx = ± .005”, .xx = ± .01”
Ordering Information
Model Name
TRXAFELXABSS
TRXAFELXAESS
TRXAFELXAASS
Operating Case
Temperature
- 5°C to +70°C
- 5°C to +85°C
- 40°C to +85°C
Latch Color
Silver
Silver
Silver
Nominal
Wavelength
1310nm FP
1310nm FP
1310nm FP
Distance
10km
10km
10km
Oplink Communications, Inc. reserves the right to make changes in equipment design or specifications without notice. Information supplied by Oplink Commu-
nications, Inc. is believed to be accurate and reliable. However, no responsibility is assumed by Oplink Communications, Inc. for its use nor for any infringements
of third parties, which may result from its use. No license is granted by implication or otherwise under any patent right of Oplink Communications, Inc.
RevA-P.2009.04.01
© 2008, Oplink Communications, Inc.
5
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