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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 I2C 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 -5C to +70C ("B" option), -5C to +85C ("E" option), or -40C to +85C ("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 Supply Voltage Input Voltage Lead Terminal Finish, Reflow Profile Limits and MSL
1
Symbol TST
Minimum - 40 -5 -5 -40 0 0 -
Maximum + 85 +70 +85 +85 +5.0 VCC NA
Units C C V V -
1
"E" option "A" option
TOP VCC VIN -
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 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 1
(Over Operating Case Temperature. VCC = 3.13 to 3.47V)
Symbol B PO C RMS tr, tf Phi /Plo POFF 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 62.5/125m, 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 LOS Thresholds LOS Hysteresis LOS Timing Delay Wavelength of Operation
1
(Over Operating Case Temperature. VCC = 3.13 to 3.47V)
Symbol B Pmin
-10
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 s nm
BER)
1
Pmax Plos+ Plost_loss_off t_loss_on
23
Increasing Light Input Decreasing Light Input Increasing Light Input Decreasing Light Input
Measured with 2 -1 PRBS at 125Mb/s for Fast Ethernet, and with 2 -1 PRBS at 156Mb/s & 622Mb/s for OC-3 & OC-12.
7
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
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)
1 2
(Over Operating Case Temperature. VCC = 3.13 to 3.47V) Minimum 0.25 2.0 0 Typical Maximum 2.4 VCC 0.8 Units V V V
Symbol VPP-DIF VIH VIL
2
Differential peak-to-peak voltage. There is an internal 4.7 to 10k 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. VCC = 3.13 to 3.47V)) Symbol VPP-DIF VOH VOL Minimum 0.6 2.0 0 Typical Maximum 2.0 VCC + 0.3 0.5 Units V V V
Differential peak-to-peak voltage across external 100 load. Open collector compatible, 4.7 to 10k pull-up resistor to Vcc (Host Supply Voltage).
Electrical Power Supply Characteristics
Parameter Supply Voltage Supply Current VCC ICC
(Over Operating Case Temperature. VCC = 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
1H 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) (100 to ground internally) RX DATA OUT+ to 50 load RX DATA OUTto 50 load
+
10
0.1
TRXA12MM 8 15 Multi-rate 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 10k
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 - 10k 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: 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 I2C 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 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 0.1F power supply bypass capacitors should be as close to the transceiver module as possible.
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 Communications, 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 (c) 2006, Oplink Communications, Inc. 5

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