The TRXAG1M SFP series of multi-rate fiber optic transceivers with integrated
digital diagnostics monitoring functionality provide a quick and reliable in-
terface for 1000BASE-LX Gigabit Ethernet and 1.062GBd Fibre Channel ap-
plications. The transceivers are designed to support data rates ranging from
1.25Gb/s down to 125Mb/s. The diagnostic functions, alarm and warning fea-
tures as described in the Multi-Source Agreement (MSA) document, SFF-8472
(Rev. 9.4), are provided via an I
2
C serial interface.
Four options are offered with minimum optical link power budgets of 11, 18,
22 and 24dB to support 10km to 80km link applications. Option “LX” uses a
1310nm Fabry Perot laser and provides a minimum optical link budget of
11dB, corresponding to a minimum distance of 10km, assuming fiber loss of
0.45dB/km. Option “EX” uses a 1310nm DFB laser and provides a minimum op-
tical link budget of 18dB, corresponding to a minimum distance of 40km, as-
suming fiber loss of 0.35dB/km. Options “YX” and “ZX” use 1550nm DFB lasers
and provide a minimum optical link budgets of 22dB and 24dB respectively,
which correspond to minimum distances of 72km and 80km, assuming fiber
loss of 0.25dB/km. All modules satisfy Class I Laser Safety requirements in ac-
cordance with the U.S. FDA/CDRH and international IEC-60825 standards.
The transceivers connect to standard 20-pad SFP connectors for hot plug ca-
pability. This allows the system designer to make configuration changes or
maintenance by simply plugging in different types of transceivers without
removing the power supply from the host system.
The transceivers have colored bail-type latches, which offer an easy and
convenient way to release the modules. The latch is compliant with the SFP
MSA.
The transmitter and receiver DATA interfaces are AC-coupled internally. LV-
TTL Transmitter Disable control input and Loss of Signal output interfaces are
also provided.
The transceivers operate from a single +3.3V power supply over three oper-
ating case temperature ranges of -5°C to +70°C, -25°C to +85°C, or -40°C to
+85°C. The housing is made of plastic and metal for EMI immunity.
Features
Lead Free Design & Fully RoHS Compliant
Compliant with IEEE 802.3z Gigabit Ethernet
1000BASE-LX PMD Specifications
Compatible with SFP MSA
Compliant with 1.062GBd Fibre Channel 100-SM
LC-L FC-PI Standards
Digital Diagnostics through Serial Interface
Internal Calibration for Digital Diagnostics
Distance Options to Support 10km to 80km
(Please see note on Distance in Ordering
Information)
Eye Safe (Class I Laser Safety)
Duplex LC Optical Interface
Loss of Signal Output & TX Disable Input
Hot-pluggable
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
“C” option
“A” option
V
cc
V
in
-
T
op
Minimum
- 40
-5
- 25
- 40
0
0
-
Maximum
+ 85
+ 70
+ 85
+ 85
+ 5.0
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
RevB-P.2009.06.23
TRXAG1M Single Mode
Transmitter Performance Characteristics
(Over Operating Case Temperature,
V
CC
= 3.13 to 3.47V)
Parameter
Operating Data Rate
LX
2
Optical Output Power
1
EX
YX
ZX
LX
Center Wavelength
Spectral Width (RMS)
Spectral Width (-20dB)
Side Mode Suppression Ratio
Extinction Ratio
Deterministic Jitter
Total Jitter
Optical Rise/Fall Time (20% to 80%)
Relative Intensity Noise
Dispersion Penalty
3
Transmitter Output Eye
1
2
Symbol
B
Minimum
125
- 9.0
- 4.5
- 2.0
0
1275
Typical
-
-
-
-
-
1310
1310
1550
-
-
-
-
-
-
-
-
-
-
Maximum
1250
- 3.0
0
+ 3.0
+ 5.0
1357
1335
1580
2.5
1.0
-
-
80
227
0.32
- 120
1.2
1.5
Units
Mb/s
P
O
dBm
EX
YX, ZX
LX
EX, YX, ZX
EX, YX, ZX
λ
C
Δλ
RMS
Δλ
20
SMSR
P
hi
/P
lo
DJ
TJ
t
r
, t
f
RIN
1280
1500
-
-
30
9
-
-
-
-
-
-
nm
nm
nm
dB
dB
ps
ps
ns
dB/Hz
dB
YX
ZX
-
Compliant with Eye Mask Defined in IEEE 802.3z and FC-PI Rev. 13 Standards
Measured average power coupled into single mode fiber (SMF).
For 50μm or 62.5μm multimode fiber (MMF) operation, the output power is 0.5dB less and is measured after a SMF offset-launch mode-conditioning patch cord as specified in IEEE 802.3z.
3
Specified at 1440ps/nm (YX) and 1600ps/nm (ZX) dispersion, which corresponds to the approximate worst-case dispersion for 72km and 80km G.652/G.654 fiber over the wavelength range of 1500 to 1580nm.
Receiver Performance Characteristics
(Over Operating Case Temperature,
V
CC
= 3.13 to 3.47V)
Parameter
Operating Data Rate
LX
Minimum Input Optical Power (10
-12
BER)
1
Maximum Input Optical Power (10
-12
BER)
1
LX
Increasing Light Input
LOS Thresholds
Decreasing Light Input
LOS Timing
Delay
LOS Hysteresis
Deterministic Jitter
Total Jitter
Wavelength of Operation
Optical Return Loss
Electrical 3dB Upper Cutoff Frequency
Stressed Receiver Sensitivity
1
7
Symbol
B
EX
YX, ZX
P
max
EX
YX, ZX
LX
EX, YX, ZX
P
los-
t_loss_off
t_loss_on
-
DJ
TJ
λ
ORL
-
P
los+
P
min
Minimum
125
- 20.0
- 22.5
- 24.0
- 3.0
-
-
-
- 30.0
- 35.0
-
-
0.5
-
-
1100
12
-
Typical
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Maximum
1250
-
-
-
-
- 20.0
- 22.5
- 24.0
-
-
100
100
-
170
266
1600
-
1500
Units
Mb/s
dBm
dBm
dBm
Increasing Light Input
Decreasing Light Input
µs
dB
ps
ps
nm
dB
MHz
Compliant with IEEE 802.3z Standard
When measured with 2 -1 PRBS at 125Mb/s, 1062.5Mb/s & 1250Mb/s, and at 1310nm for LX & EX, 1550nm for YX & ZX.
Please refer to page 4 for Laser Safety information
Oplink Communications, Inc.
2
RevB-P. 2009.06.23
TRXAG1M Single Mode
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
0.50
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
200
Maximum
3.47
300
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
RevB-P. 2009.06.23
TRXAG1M Single Mode
Example of SFP host board schematic
1µH coil or ferrite bead
(<0.2Ω series resistance)
Vcc
3.3V
Vcc
3.3V
+
10
0.1
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
TRXAG1M
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 in 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.
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.
Laser Safety:
All transceivers are Class I Laser products
per FDA/CDRH and IEC-60825 standards. They must be
The indicated transmission distance is for guidelines only, not guaranteed. The exact distance is dependent on the fiber loss, connector and splice loss,
and allocated system penalty. Longer distances can be supported if the optical link power budget is satisfied.
Assuming a total connector and splice loss of 2dB, total system penalty of 2dB and fiber cable loss of 0.35dB/km.
Assuming a total connector and splice loss of 2dB, total system penalty of 2dB and fiber cable loss of 0.25dB/km.
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.
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