Multi-rate OC-12/STM-4 SFP Multimode
Transceivers with Digital Diagnostics
TRXA12MM Multi-Rate
Product Description
The TRXA12MM Multi-rate SFP fiber optic transceivers with integrated
digital diagnostics monitoring functionality provide a quick and reliable
interface for Fast Ethernet, OC-3/STM-1 and OC-12/STM-4 multimode
applications. The diagnostic monitoring functions, alarm and warning
features are provided via an I
2
C serial interface. The transceivers are
designed to be compatible with the ATM requirements at OC-3/STM-1
(156Mb/s) and OC-12/STM-4 (622Mb/s) data rate, and is suitable for Fast
Ethernet applications.
The TRXA12MM Multi-rate transceivers connect to standard 20-pad
SFP connectors for hot plug capability. 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 transmitter design incorporates a highly reliable 1310nm LED and an
integrated driver circuit. The receiver features a transimpedance amplifier
IC 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 output interfaces 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 enhancement.
Features
Lead Free Design & Fully RoHS Compliant
Compatible with Fast Ethernet (125Mb/s) and
ATM/ SONET Specifications for OC-3/STM-1
(156Mb/s) & OC-12/STM-4 (622Mb/s)
Compatible with SFP MSA
Digital Diagnostics Monitoring through Serial
Interface
Distances up to 500m
Hot-pluggable
Three Operating Case Temperature Options
Loss of Signal Output
TX Disable Input
Duplex LC Optical Interface
Single +3.3V Power Supply
Absolute Maximum Ratings
Parameter
Storage Temperature
"B" option
Operating Case Temperature
1
Supply Voltage
Input Voltage
Lead Terminal Finish, Reflow Profile Limits and MSL
1
Symbol
T
ST
"E" option
“A” option
V
CC
V
IN
-
T
OP
Minimum
- 40
-5
-5
-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
Rev1.2008.07.10
TRXA12MM Multi-rate
Transmitter Performance Characteristics
All parameters guaranteed only at typical data rate
Parameter
Operating Data Rate
Optical Output Power
1
Center Wavelength
Spectral Width (RMS)
Optical Rise and Fall Time (10% to 90%)
Extinction Ratio
Transmitter OFF Power
Systematic Jitter (DCD & DDJ, peak-to-peak)
Random Jitter (peak-to-peak)
1
(Over Operating Case Temperature. V
CC
= 3.13 to 3.47V)
Symbol
B
P
O
λ
C
Δλ
RMS
tr, tf
P
hi
/P
lo
P
OFF
SJ
RJ
Minimum
125
- 20.0
1270
-
-
10
-
-
-
Typical
-
-
-
140
1.0
-
-
-
-
Maximum
622
- 14.0
1380
200
1.25
-
-45.0
0.4
0.15
Units
Mb/s
dBm
nm
nm
ns
dB
dBm
rs
rs
Measured average power coupled into 62.5/125μm, 0.275 NA graded-index multimode fiber.
The minimum power specified is at Beginning-of-Life.
Receiver Performance Characteristics
All parameters guaranteed only at typical data rate
Parameter
Operating Data Rate
Receiver Sensitivity (10
-10
BER)
1
Maximum Input Optical Power (10
-10
BER)
1
LOS Thresholds
LOS Hysteresis
LOS Timing Delay
Wavelength of Operation
1
(Over Operating Case Temperature. V
CC
= 3.13 to 3.47V)
Symbol
B
P
min
P
max
P
los+
P
los-
-
t_loss_off
t_loss_on
λ
Minimum
125
-26.0
-14.0
-
-40.0
0.5
-
-
1100
Typical
-
-28.0
-6.0
-
-
1.0
-
-
-
Maximum
622
-
-
-26.0
-
-
100
350
1600
Units
Mb/s
dBm
dBm
dBm
dB
μs
nm
Increasing Light Input
Decreasing Light Input
Increasing Light Input
Decreasing Light Input
Measured with 2
7
-1 PRBS at 125Mb/s for Fast Ethernet, and with 2
23
-1 PRBS at 156Mb/s & 622Mb/s for OC-3 & OC-12.
Laser Safety: All transceivers are Class I Laser
products per FDA/CDRH and IEC-60825 stan-
dards. 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
Rev1.2008.07.10
TRXA12MM Multi-rate
Transmitter Performance Characteristics
Parameter
Input Voltage Swing (TD+ & TD-)
1
Input HIGH Voltage (TX Disable)
2
Input LOW Voltage (TX Disable)
2
1
2
(Over Operating Case Temperature. V
CC
= 3.13 to 3.47V)
Minimum
0.25
2.0
0
Typical
-
-
-
Maximum
2.4
V
CC
0.8
Units
V
V
V
Symbol
V
PP-DIF
V
IH
V
IL
Differential peak-to-peak voltage.
There is an internal 4.7 to 10kΩ pull-up resistor to VccT.
Receiver Electrical Interface
Parameter
Output Voltage Swing (RD+ & RD-)
1
Output HIGH Voltage (LOS)
2
Output LOW Voltage (LOS))
2
1
2
(Over Operating Case Temperature. V
CC
= 3.13 to 3.47V))
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
Parameter
Supply Voltage
Supply Current
V
CC
I
CC
(Over Operating Case Temperature. V
CC
= 3.13 to 3.47V))
Minimum
3.13
-
Typical
3.3
210
Maximum
3.47
285
Units
V
mA
Symbol
Module Definition
MOD_DEF(0)
pin 6
MOD_DEF(1)
pin 5
MOD_DEF(2)
pin 4
Interpretation by Host
TTL LOW
SCL
SDA
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
20
19
18
17
16
15
14
13
12
11
Toward
ASIC
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
4
5
6
7
8
9
10
Top of Board
Pin 2 Internally Grounded
Bottom of Board
(as viewed thru top of board)
Oplink Communications, Inc.
3
Rev1.2008.07.10
TRXA12MM Multi-rate
Example of SFP host board schematic
Vcc
3.3V
1μH coil or ferrite bead
(<0.2 series resistance)
Vcc
3.3V
+
10
0.1
0.1
16
R
R
R
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
TRXA12MM
8
Multi-rate
15
4
5
3
100
TX Disable
50 line
TX DATA IN+
6
13
50 line
50 line
18
50 line
19
TX DATA IN-
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
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 RPM (receiver power monitor), internal temperature and
module supply voltage. The device is internally calibrated.
The data transfer protocol and the details of the mandatoryand
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.
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:
Per SFP MSA, pin 2 is TX Fault. This transceiver
is LED based and does not support TX Fault. Pin 2 is
internally connected to transmitter circuit ground (TX GND)
to indicate normal operation.
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 (noconnection),
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
Oplink Communications, Inc.
4
Rev1.2008.07.10
TRXA12MM Multi-rate
Mechanical Package
46335 Landing Parkway Fremont, CA 94538-6407 Tel: (510) 933-7200 Fax: (510) 933-7300 Email: Sales@Oplink.com
Dimensions in inches [mm]
Default tolerances:
.xxx = + .005”, .xx = + .01”
Ordering Information
Oplink can provide a remarkable range of customized optical solutions. For detail, please contact Oplink’s Sales
and Marketing for your requirements and ordering information (510) 933-7200 or Sales@oplink.com.
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.
Rev1.2008.07.10
© 2006, Oplink Communications, Inc.
5
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