The TRXBG1EXM modules are single fiber, bi-directional
SFP transceivers that provide a quick and reliable interface
for 1000BASE-BX Gigabit Ethernet applications. Two types
of modules are available: 1310nm DFB laser-based
transceiver (BX-U), and 1550nm DFB laser-based
transceivers (BX-D). These transceivers are designed to
support data rates ranging from 1250Mb/s down to 125Mb/s
and are integrated with digital diagnostics monitoring, which
provides features to detect a problem before system
performance is impacted. The diagnostic functions, alarms
and warning features are provided via an I2C serial interface
as described per the Multi-Source Agreement (MSA)
document, SFF-8472 (Rev. 9.4).
All modules meet Class I Laser Safety requirements in
accordance with the U.S. and international standards as
described in the FDA/CDRH and IEC-60825 documents,
respectively. The TRXBG1EXM transceivers connect to
standard 20-pad SFP connectors for hot plug capability.
This allows the system designer to make configuration or
maintenance changes by simply plugging in different types
of transceivers without removing the power supply from
the host system.
The transceivers have color-coded latches that identify the
TX wavelength. The MSA compatible latch offers an easy
and convenient way to release the module.
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 an operating case temperature range of -5°C to +70°C
or -40°C to +85°C. The package is made of metal.
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
Commercial
Industrial
T
op
V
CC
V
in
-
Minimum
- 40
-5
- 40
0
0
-
Maximum
+ 85
+ 70
+ 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.
Optical Communication Products, Inc.
1
21737-0941, Rev. D
3-13-2007
TRXBG1EXM
Transmitter Performance Characteristics
(over Operating Case Temperature,
V
CC
= 3.13 to 3.47V)
Parameter
Operating Data Rate
Optical Output Power
1
Center Wavelength
Spectral Width (-20dB)
Extinction Ratio
Transmitter OFF Output Power
Relative Intensity Noise
Optical Return Loss Tolerance
Transmitter Reflectance
Total Jitter
Transmitter Output Eye
1
Symbol
B
BX-U
BX-D
BX-U
BX-D
P
o
λ
c
∆λ
20
P
hi
/P
lo
-
RIN
12
OMA
ORLT
TR
TJ
Minimum
125
- 6.5
- 7.0
1260
1540
-
8
-
-
-
-
-
Typical
-
-
-
1310
1550
-
-
-
-
-
-
-
Maximum
1250
0
0
1360
1560
1.0
-
- 45
- 113
12
- 12
227
Units
Mb/s
dBm
dBm
nm
nm
dB
dBm
dB/Hz
dB
dB
ps
Compliant with Eye Mask Defined in IEEE 802.3-2005 Standard
Measured average power coupled into single mode fiber.
Receiver Performance Characteristics
(over Operating Case Temperature,
V
CC
= 3.13 to 3.47V)
Parameter
Operating Data Rate
Minimum Input Optical Power (10
-12
BER)
1
Maximum Input Optical Power (10
-12
BER
)1
LOS Thresholds
LOS Hysteresis
1
Total Jitter
Wavelength of Operation
Receiver Reflectance
Electrical 3dB Upper Cutoff Frequency
1
Symbol
B
P
min
P
max
P
los+
P
los-
-
TJ
BX-D
BX-U
λ
-
-
Minimum
125
- 23.5
- 3.0
-
- 35.0
0.5
-
1260
1480
-
-
Typical
-
-
-
-
-
-
-
-
-
-
-
Maximum
1250
-
-
- 23.5
-
-
266
1360
1560
- 12
1500
Units
Mb/s
dBm
dBm
dBm
dB
ps
nm
dB
MHz
Increasing Light Input
Decreasing Light Input
Measured at 1250Mb/s with 2
7
-1 PRBS and 1310nm, 1490nm , and 1550nm wavelengths.
Laser Safety:
All transceivers are Class I Laser products per
FDA/CDRH and IEC-60825 standards. They must be operated
under specified operating conditions.
Optical Communication Products, Inc.
DATE OF MANUFACTURE:
MANUFACTURED IN THE USA
This product complies with
21 CFR 1040.10 and 1040.11
Meets Class I Laser Safety Requirements
2
21737-0941, Rev. D
3-13-2007
TRXBG1EXM
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)
Output HIGH Voltage (TX Fault)
3
Output LOW Voltage (TX Fault)
3
1
2
2
Symbol
V
PP-DIF
V
IH
V
IL
V
OH
V
OL
Minimum
0.5
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
Input LOW Voltage (TX Disable)
2
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)
1
2
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
Vcc
Icc
Minimum
3.13
-
Typical
3.3
175
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
TX GND
TX Fault
TX Disable
MOD_DEF(2)
MOD_DEF(1)
Host Board Connector Pad Layout
1
2
3
4
5
6
7
8
9
10
20
1
2
3
4
19
18
17
16
Toward
15
14
13
12
11
Toward
MOD_DEF(0)
NO CONNECTION
LOS
RX GND
RX GND
Bezel
5
6
7
8
9
10
ASIC
Top of Board
Bottom of Board
(as viewed thru top of board)
3
21737-0941, Rev. D
3-13-2007
TRXBG1EXM
Example of SFP host board schematic
Vcc
3.3V
1
µ
H coil or ferrite bead
(<0.2
Ω
series resistance)
Vcc
3.3V
+
10
0.1
16
0.1
R R R
2
8
4
5
6
50
Ω
line
50
Ω
line
R
TX Fault
LOS
MOD_DEF(2)
MOD_DEF(1)
MOD_DEF(0)
(100
Ω
to ground internally)
RX DATA OUT+
to 50
Ω
load
RX DATA OUT-
to 50
Ω
load
+
15
10
0.1
TRXBG1EXM
TX Disable
50
Ω
line
TX DATA IN+
50
Ω
line
TX DATA IN-
19
18
3
100
13
12
1, 9,10,11,14,17,20
R: 4.7 to 10kΩ
Ω
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.
4
21737-0941, Rev. D
3-13-2007
TRXBG1EXM
Package Outline
8.9
.35
56.4
2.22 REF
13.4 0.1
.528 .004
9.9
.390
47.5
1.870
6.4
.250
8.5 0.1
.336 .004
3.12
.123
5.3
.210
13.6
.534
45 0.20
1.772 .008
41.8 0.15
1.646 .006
Dimensions in inches [mm]
Default tolerances:
.xxx = + .005”, .xx = + .01”
Ordering Information
Model Name
TRXBG1EXNBBMH
TRXBG1EXNBYM5
TRXBG1EXNABMH
TRXBG1EXNAYM5
Temperature Range
- 5°C to +70°C
- 5°C to +70°C
- 40°C to +85°C
- 40°C to +85°C
Latch Color
Blue
Yellow
Blue
Yellow
Typical Wavelength
Tx
1310nm
1550nm
1310nm
1550nm
Rx
1550nm
1310nm
1550nm
1310nm
Distance
40km
40km
40km
40km
Optical Communication Products, Inc.
6101 Variel Avenue, Woodland Hills, CA 91367, Tel.: 818-251-7100, FAX: 818-251-7111, www.ocp-inc.com
Optical Communication Products, Inc. reserves the right to make changes in equipment design or specifications without notice. Information supplied by Optical Communication
Products, Inc. is believed to be accurate and reliable. However, no responsibility is assumed by Optical Communication Products, 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 Optical Communication Products, Inc.
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