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AFCT-57J5APZ
Digital Diagnostic SFP, 1310nm, Fabry Perot 3.072/2.4576 Gb/s, RoHS OBSAI/CPRI Compatible Optical Transceiver
Data Sheet
1310nm, SFP (Small Form Pluggable), Low Voltage (3.3V) Digital Diagnostic, Optical Transceiver
Description
Avago's AFCT-57J5APZ optical transceiver supports high speed serial links over single mode optical fiber at signaling rates up to 3.072Gb/s for wireless base station applications involving the OBSAI or CPRI protocols, as well as related applications. The transceiver is compliant with Small Form Pluggable (SFP) single-source agreements INF-8074 and SFF-8472 for mechanical and electrical specifications and FOCIS/IEC specifications for optical duplex LC connectors. As an enhancement to the conventional SFP interfaced defined in INF-8074, the AFCT-57J5APZ is compliant to SFF-8472 (Digital Diagnostic Interface for Optical Transceivers). Using the 2-wire serial interface defined in SFF8472, the transceiver provides real time temperature, supply voltage, laser bias current, laser average output power and received input power. This information is in addition to conventional SFP base data. The digital diagnostic interface also adds the ability to disable the transmitter and monitor the status of transmitter fault and receiver loss of signal.
Features
* Fully RoHS Compliant * Diagnostic Features Per SFF-8472 "Diagnostic Monitoring Interface for Optical Transceivers" * Real time monitors of: - Transmitted Optical Power - Received Optical Power - Laser Bias Current - Temperature - Supply Voltage * Industrial Temperature and Supply Voltage Operation (-40C to 85C) (3.3V 10%) * Transceiver Specifications per SFP (INF-8074) and SFF8472 (revision 9.6) * Up to 7km with 9um fiber for 3.072 Gb/s * Up to 8km with 9um fiber for 2.4576 Gb/s * LC Duplex optical connector interface conforming to ANSI TIA/EIA604-10 (FOCIS 10A) * 1310nm Fabry Perot Laser (FP) Source Technology * IEC 60825-1 Class 1/CDRH Class 1 laser eye safe * Compatible with Fibre Channel and Gigabit Ethernet applications
Related Products
* AFBR-57J5AEZ: 850nm +3.3V LC SFP for OBSAI and CPRI * AFCT-57R5AEZ: 1310nm +3.3V LC SFP for 4.25/2.125/1.0625 GBd Fibre Channel * AFBR-57R5AEZ: 850nm +3.3V LC SFP for 4.25/2.125/1.0625 GBd Fibre Channel * AFCT-57D5APZ: 1310nm +3.3V LC SFP for 8.5/4.25/2.125 GBd Fibre Channel
Applications
Wireless and cellular base station system interconnect: OBSAI rates: 3.072 Gb/s, 1.536 Gb/s, 0.768 Gb/s CPRI rates: 3.072 Gb/s, 2.4576 Gb/s, 1.2288 Gb/s, 0.6144 Gb/s
Digital Diagnostic Interface and Serial Identification
The 2-wire serial interface is based on ATMEL AT24C01A series EEPROM protocol and signaling detail. Conventional EEPROM memory, bytes 0-255 at memory address 0xA0, is organized in compliance with INF-8074. New digital diagnostic information, bytes 0-255 at memory address 0xA2, is compliant to SFF-8472. The new diagnostic information provides the opportunity for Predictive Failure Identification, Compliance Prediction, Fault Isolation and Component Monitoring.
provide real-time access to transceiver internal supply voltage and temperature, allowing a host to identify potential component compliance issues. Received optical power is also available to assess compliance of a cable plant and remote transmitter. When operating out of requirements, the link cannot guarantee error free transmission.
Fault Isolation
The fault isolation feature allows a host to quickly pinpoint the location of a link failure, minimizing downtime. For optical links, the ability to identify a fault at a local device, remote device or cable plant is crucial to speeding service of an installation. AFCT-57J5APZ realtime monitors of Tx_Bias, Tx_Power, Vcc, Temperature and Rx_Power can be used to assess local transceiver current operating conditions. In addition, status flags Tx_Disable and Rx Loss of Signal (LOS) are mirrored in memory and available via the two-wire serial interface.
Predictive Failure Identification
The AFCT-57J5APZ predictive failure feature allows a host to identify potential link problems before system performance is impacted. Prior identification of link problems enables a host to service an application via "fail over" to a redundant link or replace a suspect device, maintaining system uptime in the process. For applications where ultra-high system uptime is required, a digital SFP provides a means to monitor two real-time laser metrics associated with observing laser degradation and predicting failure: average laser bias current (Tx_Bias) and average laser optical power (Tx_Power).
Component Monitoring
Component evaluation is a more casual use of the AFCT-57J5APZ real-time monitors of Tx_Bias, Tx_Power, Vcc, Temperature and Rx_Power. Potential uses are as debugging aids for system installation and design, and transceiver parametric evaluation for factory or field qualification. For example, temperature per module can be observed in high density applications to facilitate thermal evaluation of blades, PCI cards and systems.
Compliance Prediction:
Compliance prediction is the ability to determine if an optical transceiver is operating within its operating and environmental requirements. AFCT-57J5APZ devices
Optical Interface
Light from Fiber
Receiver Photo-Detector
Amplification & Quantization
Electrical Interface
Rate Select RD+ (Receive Data) RD- (Receive Data) Rx Loss Of Signal
EEPROM CONTROLLER
MOD-DEF2 (SDA)
EEPROM
MOD-DEF1 (SCL) MOD-DEF0
Transmitter
Light to Fiber
TX_DISABLE Laser Driver & Safety Circuit TD+ (Transmit Data) TD- (Transmit Data) TX_FAULT
VCSEL
Figure 1 . Transceiver Functional Diagram
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Transmitter Section
The transmitter section includes consists of the Transmitter Optical SubAssembly (TOSA) and laser driver circuitry. The TOSA, containing a 1310nm FABRY PEROT light source, is located at the optical interface and mates with the LC optical connector. The TOSA is driven by a custom IC which uses the incoming differential high speed logic signal to modulate the laser diode driver current. This Tx laser driver circuit regulates the optical power at a constant level provided the incoming data pattern is dc balanced (8B/10B code, for example).
Receiver Section
The receiver section includes the Receiver Optical SubAssembly (ROSA) and the amplification/quantization circuitry. The ROSA, containing a PIN photodiode and custom transimpedance amplifier, is located at the optical interface and mates with the LC optical connector. The ROSA output is fed to a custom IC that provides post-amplification and quantization.
Receiver Loss of Signal (Rx_LOS)
The post-amplification IC also includes transition detection circuitry which monitors the ac level of incoming optical signals and provides a TTL/CMOS compatible status signal to the host (pin 8). An adequate optical input results in a low Rx_LOS output while a high Rx_LOS output indicates an unusable optical input. The Rx_LOS thresholds are factory set so that a high output indicates a definite optical fault has occurred. Rx_LOS can also be monitored via the two-wire serial interface (address A2h, byte 110, bit 1).
Transmit Disable (Tx_Disable)
The AFCT-57J5APZ accepts a TTL and CMOS compatible transmit disable control signal input (pin 3) which shuts down the transmitter optical output. A high signal implements this function while a low signal allows normal transceiver operation. In the event of a fault (e.g. eye safety circuit activated), cycling this control signal resets the module as depicted in Figure 4. An internal pull up resistor disables the transceiver transmitter until the host pulls the input low. Host systems should allow a 10ms interval between successive assertions of this control signal. Tx_Disable can also be asserted via the twowire serial interface (address A2h, byte 110, bit 6) and monitored (address A2h, byte 110, bit 7). The contents of A2h, byte 110, bit 6 are logic OR'd with hardware Tx_Disable (pin 3) to control transmitter operation..
Functional Data I/O
The AFCT-57J5APZ interfaces with the host circuit board through twenty I/O pins (SFP electrical connector) identified by function in Table 2. The board layout for this interface is depicted in Figure 6. The AFCT-57J5APZ high speed transmit and receive interfaces require SFP MSA, OBSAI or CPRI compliant signal lines on the host board. To simplify board requirements, biasing resistors and ac coupling capacitors are incorporated into the SFP transceiver module (per INF-8074) and hence are not required on the host board. The Tx_ Disable, Tx_Fault, Rx_LOS and Rate_Select lines require TTL lines on the host board (per INF-8074) if used. If an application chooses not to take advantage of the functionality of these pins care must be taken to ground Tx_ Disable (for normal operation) and Rate_Select is set to default in the proper state. Figure 2 depicts the recommended interface circuit to link the AFCT-57J5APZ to supporting physical layer ICs. Timing for MSA compliant control signals implemented in the transceiver are listed in Figure 4.
Transmit Fault (Tx_Fault)
A catastrophic laser fault will activate the transmitter signal, TX_FAULT, and disable the laser. This signal is an open collector output (pull-up required on the host board). A low signal indicates normal laser operation and a high signal indicates a fault. The TX_FAULT will be latched high when a laser fault occurs and is cleared by toggling the TX_DISABLE input or power cycling the transceiver. The transmitter fault condition can also be monitored via the two-wire serial interface (address A2, byte 110, bit 2).
Eye Safety Circuit
The AFCT-57J5APZ provides Class 1 (single fault tolerant) eye safety by design and has been tested for compliance with the requirements listed in Table 1. The eye safety circuit continuously monitors the optical output power level and will disable the transmitter upon detecting an unsafe condition beyond the scope of Class 1 certification. Such unsafe conditions can be due to inputs from the host board (Vcc fluctuation, unbalanced code) or a fault within the transceiver.
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Application Support
An Evaluation Kit and Reference Designs are available to assist in evaluation of the AFCT-57J5APZ . Please contact your local Field Sales representative for availability and ordering details.
Regulatory Compliance
The AFCT-57J5APZ complies with all applicable laws and regulations as detailed in Table 1. Certification level is dependent on the overall configuration of the host equipment. The transceiver performance is offered as a figure of merit to assist the designer
Caution
There are no user serviceable parts nor maintenance requirements for the AFCT-57J5APZ. All mechanical adjustments are made at the factory prior to shipment. Tampering with, modifying, misusing or improperly handling the AFCT-57J5APZ will void the product warranty. It may also result in improper operation and possibly overstress the laser source. Performance degradation or device failure may result. Connection of the AFCT-57J5APZ to a light source not compliant with these specifications, operating above maximum operating conditions or in a manner inconsistent with it's design and function may result in exposure to hazardous light radiation and may constitute an act of modifying or manufacturing a laser product. Persons performing such an act are required by law to re-certify and re-identify the laser product under the provisions of U.S. 21 CFR (Subchapter J) and TUV.
Electrostatic Discharge (ESD)
The AFCT-57J5APZ is compatible with ESD levels found in typical manufacturing and operating environments as described in Table 1. In the normal handling and operation of optical transceivers, ESD is of concern in two circumstances. The first case is during handling of the transceiver prior to insertion into an SFP compliant cage. To protect the device, it's important to use normal ESD handling precautions. These include using of grounded wrist straps, workbenches and floor wherever a transceiver is handled. The second case to consider is static discharges to the exterior of the host equipment chassis after installation. If the optical interface is exposed to the exterior of host equipment cabinet, the transceiver may be subject to system level ESD requirements.
Ordering Information
Please contact your local field sales engineer or one of Avago Technologies franchised distributors for ordering information. For technical information, please visit Avago Technologies' WEB page at www.Avago.com or contact Avago Technologies Semiconductor Products Customer Response Center at 1-800-235-0312. For information related to SFF Committee documentation visit www.sffcommittee.org.
Electromagnetic Interference (EMI)
Equipment incorporating gigabit transceivers is typically subject to regulation by the FCC in the United States, CENELEC EN55022 (CISPR 22) in Europe and VCCI in Japan. The AFCT-57J5APZ's compliance to these standards is detailed in Table 1. The metal housing and shielded design of the AFCT-57J5APZ minimizes the EMI challenge facing the equipment designer.
EMI Immunity (Susceptibility)
Due to its shielded design, the EMI immunity of the AFCT-57J5APZ exceeds typical industry standards.
Flammability
The AFCT-57J5APZ optical transceiver is made of metal and high strength, heat resistant, chemical resistant and UL 94V-0 flame retardant plastic.
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Table 1. Regulatory Compliance
Feature Electrostatic Discharge (ESD) to the Electrical Pins Electrostatic Discharge (ESD) to the Duplex LC Receptacle Test Method MIL-STD-883C Method 3015.4 Variation of IEC 61000-4-2 Performance Class 1 (> 2000 Volts) Typically, no damage occurs with 25 kV when the duplex LC connector receptacle is contacted by a Human Body Model probe. 10 contacts of 8 KV on the electrical faceplate with device inserted into a panel. Air discharge of 15kV(min) contact to connector w/o damage System margins are dependent on customer board and chassis design.
GR1089 Electrostatic Discharge (ESD) to the Optical Connector Electromagnetic Interference (EMI) Variation of IEC 801-2 FCC Class B CENELEC EN55022 Class B (CISPR 22A) VCCI Class 1 Variation of IEC 61000-4-3 US FDA CDRH AEL Class 1 US21 CFR, Subchapter J per Paragraphs 1002.10 and 1002.12. (IEC) EN60825-1: 1994 + A11+A2 (IEC) EN60825-2: 1994 + A1 (IEC) EN60950: 1992 + A1 + A2 + A3 + A4 + A11 Underwriters Laboratories and Canadian Standards Association Joint Component Recognition for Information Technology Equipment Including Electrical Business Equipment
Immunity Laser Eye Safety and Equipment Type Testing
BAUART ** GEPRUFT
TUV Rheinland Product Safety
**
Typically shows no measurable effect from a 10V/m field swept from 10 MHz to 1 GHz. CDRH certification # TBD TUV file # TBD
TYPE APPROVED
Component Recognition
UL File # TBD
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GND,T Tx DIS Tx FAULT
VCC,T
6.8 k
Tx_DISABLE Tx_FAULT
TD+
.01 F
100
TD 4.7 k to 10 k 1 H 0.1 F VCC,T
.01 F
LASER DRIVER
PROTOCOL IC
SERDES IC
3.3 V 10 F 0.1 F 1 H 10 F 0.1 F 4.7 k to 10 k RD+ 100 VCC,R
.01 F
RDRx LOS
.01 F
LOSS OF SIGNAL RATE SELECT 3.3 V 4.7 k to 10 k MODULE DETECT SCL SDA 4.7 k to 10 k 4.7 k to 10 k
GND,R
30 k
POST AMPLIFIER
MOD_DEF0
MOD_DEF1
MOD_DEF2
Figure 2. Typical Application Configuration
VCCT 0.1 F
1 H
VCCR 0.1 F 10 F
1 H 0.1 F 10 F
3.3 V
SFP MODULE
HOST BOARD
NOTE: INDUCTORS MUST HAVE LESS THAN 1 SERIES RESISTANCE TO LIMIT VOLTAGE DROP TO THE SFP MODULE.
Figure 3. Recommended Power Supply Filter
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Table 2. Pin Description
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name VeeT TX_FAULT TX_DISABLE MOD-DEF2 MOD-DEF1 MOD-DEF0 no connect RX_LOS VeeR VeeR VeeR RDRD+ VeeR VccR VccT VeeT TD+ TDVeeT Loss of Signal - High indicates loss of received optical signal Receiver Ground Receiver Ground Receiver Ground Inverse Received Data Out Received Data Out Receiver Ground Receiver Power + 3.3 V Transmitter Power + 3.3 V Transmitter Ground Transmitter Data In Inverse Transmitter Data In Transmitter Ground Note 7 Note 7 Note 6 Note 6 Note 5 Note 5 Note 4 Function/Description Transmitter Ground Transmitter Fault Indication - High indicates a fault condition Transmitter Disable - Module optical output disables on high or open Module Definition 2 - Two wire serial ID interface data line (SDA) Module Definition 1 - Two wire serial ID interface clock line (SCL) Module Definition 0 - Grounded in module (module present indicator) Note 1 Note 2 Note 3 Note 3 Note 3 Notes
Notes 1. TX_FAULT is an open collector/drain output, which must be pulled up with a 4.7k - 10kW resistor on the host board. When high, this output indicates a laser fault of some kind. Low indicates normal operation. In the low state, the output will be pulled to < 0.8V. 2. TX_DISABLE is an input that is used to shut down the transmitter optical output. It is internally pulled up (within the transceiver) with a 6.8kW resistor. Low (0 - 0.8V): Transmitter on Between (0.8V and 2.0V): Undefined High (2.0 - Vcc max) or OPEN: Transmitter Disabled 3. The signals Mod-Def 0, 1, 2 designate the two wire serial interface pins. They must be pulled up with a 4.7k - 10kW resistor on the host board. Mod-Def 0 is grounded by the module to indicate the module is present Mod-Def 1 is serial clock line (SCL) of two wire serial interface Mod-Def 2 is serial data line (SDA) of two wire serial interface 4. RX_LOS (Rx Loss of Signal) is an open collector/drain output that must be pulled up with a 4.7k - 10kW resistor on the host board. When high, this output indicates the received optical power is below the worst case receiver sensitivity (as defined by the standard in use). Low indicates normal operation. In the low state, the output will be pulled to < 0.8V. 5. RD-/+ designate the differential receiver outputs. They are AC coupled 100W differential lines which should be terminated with 100W differential at the host SERDES input. AC coupling is done inside the transceiver and is not required on the host board. The voltage swing on these lines will be between 500 and 1600 mV differential (250 - 800 mV single ended) when properly terminated. 6. VccR and VccT are the receiver and transmitter power supplies. They are defined at the SFP connector pin. The maximum supply current is 300 mA and the associated in-rush current will typically be no more than 30 mA above steady state after 500 nanoseconds. 7. TD-/+ designate the differential transmitter inputs. They are AC coupled differential lines with 100W differential termination inside the module. The AC coupling is done inside the module and is not required on the host board. The inputs will accept differential swings of 400 - 2400 mV (200 - 1200 mV single ended), though it is recommended that values between 500 and 1200 mV differential (250 - 600 mV single ended) be used for best EMI performance.
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Table 3. Absolute Maximum Ratings
Parameter Storage Temperature Case Operating Temperature Relative Humidity Supply Voltage Low Speed Input Voltage Symbol TS TC RH VccT, R VIN Minimum -40 -40 5 -0.5 -0.5 Maximum 100 100 95 3.8 Vcc+0.5 Unit C C % V V Notes Note 1,2 Note 1,2 Note 1 Note 1,2,3 Note 1
Notes 1. Absolute Maximum Ratings are those values beyond which damage to the device may occur if these limits are exceeded for other than a short period of time. See Reliability Data Sheet for specific reliability performance. 2. Between Absolute Maximum Ratings and the Recommended Operating Conditions functional performance is not intended, device reliability is not implied, and damage to the device may occur over an extended period of time. 3. The module supply voltages, VCCT and VCCR must not differ by more than 0.5V or damage to the device may occur.
Table 4. Recommended Operating Conditions
Parameter Case Operating Temperature Supply Voltage Data Rate Symbol TC VccT, R Minimum -40 2.97 0.614 Maximum 85 3.63 3.072 Unit C V Gb/s Notes Note 1,2 Note 2 Note 2
Notes 1. The Ambient Operating Temperature limitations are based on the Case Operating Temperature limitations and are subject to the host system thermal design. 2. Recommended Operating Conditions are those values for which functional performance and device reliability is implied.
Table 5. Transceiver Electrical Characteristics
(TC = -40C to 85C, VccT, VccR = 3.3V 10%) Parameter AC Electrical Characteristics Power Supply Noise Rejection (peak-peak) DC Electrical Characteristics Module supply current Power Dissipation Low Speed Outputs: Transmit Fault (TX_FAULT), Loss of Signal (RX_LOS), MOD-DEF 2 Low Speed Inputs: Transmit Disable (TX_DIS), Rate Select (RATE_SELECT) MOD-DEF 1, MOD-DEF 2 ICC PDISS VOH VOL VIH VIL 2.0 0 2.0 300 350 1000 VccT,R+0.3 0.8 Vcc 0.8 mA mA mW V V V V Note 3 Note 2 -40C to 70C -40C to 85C PSNR 100 mV Note 1 Symbol Minimum Maximum Unit Notes
Notes 1. Filter per SFP specification is required on host board to remove 10 Hz to 2 MHz content. 2. Pulled up externally with a 4.7k - 10kW resistor on the host board to 3.3V. 3. Rate_Select, Mod-Def1 and Mod-Def2 must be pulled up externally with a 4.7k - 10kW resistor on the host board to 3.3V.
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Table 6. Transmitter Optical Characteristics
(TC = -40C to 85C, VccT, VccR = 3.3V 10%) Parameter Modulated Optical Output Power (OMA) (Peak-to-Peak) Average Optical Output Power Center Wavelength Spectral Width - rms Optical Rise/Fall Time (8.5 Gb/s) RIN 12 (OMA) Transmitter Contributed Deterministic Jitter (0.614 to 3.072 Gb/s) Transmitter Contributed Total Jitter (0.614 to 3.072 Gb/s) Pout TX_DISABLE Asserted Symbol Tx,OMA Pout lC s,rms tr, tf RIN DJ TJ POFF 100 -120 50 30 80 60 -35 dBm -9.5 1280 Minimum Typical 300 -3.0 1345 Maximum Unit W dBm nm nm ps dB/Hz ps ps ps -40/85C, Note 3 -20/85C, Note 3 -40/85C, Note 4, 5 -20/85C, Note 4, 5 Note 6 20% - 80% Notes Note 2,6 Note 1, 2
Notes: 1. Max Pout is the lesser of Class 1 safety limits (CDRH and EN 60825) or receiver power, max. 2. Into single-mode optical fiber. 3. Contributed DJ is measured on an oscilloscope in average mode with 50% threshold and K28.5 pattern. 4. Contributed RJ is calculated for 1x10-12 BER by multiplying the RMS jitter (measured on a single rise or fall edge) from the oscilloscope by 14. 5. In a network link, each component's output jitter equals each component's input jitter combined with each component's contributed jitter. Contributed DJ adds in a linear fashion and contributed RJ adds in a RMS fashion. 6. OMA, center wavelength and spectral width must comply with the Triple Tradeoff Curve shown below.
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Table 7. Receiver Optical Characteristics
(TC = -40C to 85C, VccT, VccR = 3.3V 10%) Parameter Input Optical Power [Overdrive] Input Optical Modulation Amplitude Peak-to-Peak (0.614 to 3.072 Gb/s) [Sensitivity] Return Loss Loss of Signal - Assert Loss of Signal - De-Assert Loss of Signal Hysteresis PA -30 PD PD - PA 15 -20.0 0.5 Symbol PIN OMA 29 41 12 13.8 -20.5 Minimum Typical Maximum -3 Unit dBm, avg W, oma W, oma dB uW, oma dBm, avg uW, oma dBm, avg dB Note 2 Note 2 1x10-12 BER , Note 1 1x10-15 BER, Note 1 Notes
Notes 1. Input Optical Modulation Amplitude (commonly known as sensitivity) requires a valid 8B/10B encoded input. 2. These average power values are specified with an Extinction Ratio of 9dB. The loss of signal circuitry responds to valid 8B/10B encoded peak to peak input optical power, not average power.
Table 8. Transmitter and Receiver Electrical Characteristics
(TC = -40C to 85C, VccT, VccR = 3.3V 10%) Parameter High Speed Data Input: Transmitter Differential Input Voltage (TD +/-) High Speed Data Output: Receiver Differential Output Voltage (RD +/-) Receiver Contributed Deterministic Jitter (0.614 to 3.072 Gb/s) Receiver Contributed Total Jitter (0.614 to 3.072 Gb/s) Receiver Electrical Output Rise & Fall Times (20-80%) Symbol VI Vo DJ TJ Tr, tf 30 Minimum 400 500 Typical Maximum 2400 1600 25 65 200 Unit mV mV ps ps ps Notes Note 1 Note 2 Note 3, 7 Note 4, 6, 7 Note 5
Notes 1. Internally AC coupled and terminated (100 Ohm differential). 2. Internally AC coupled but requires an external load termination (100 Ohm differential). 3. Contributed DJ is measured on an oscilloscope in average mode with 50% threshold and K28.5 pattern 4. Contributed RJ is calculated for 1x10-12 BER by multiplying the RMS jitter (measured on a single rise or fall edge) from the oscilloscope by 14. 5. 20%-80% electrical rise & fall times measured with a 500 MHz signal utilizing a 1010 data pattern. 6. In a network link, each component's output jitter equals each component's input jitter combined with each component's contributed jitter. Contributed DJ adds in a linear fashion and contributed RJ adds in a RMS fashion. 7. Measured at an input optical power of 48uW, OMA.
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Table 9. Transceiver SOFT DIAGNOSTIC Timing Characteristics
(TC = -40C to 85C, VccT, VccR = 3.3V 10%) Parameter Hardware TX_DISABLE Assert Time Hardware TX_DISABLE Negate Time Time to initialize, including reset of TX_FAULT Hardware TX_FAULT Assert Time Hardware TX_DISABLE to Reset Hardware RX_LOS DeAssert Time Hardware RX_LOS Assert Time Hardware RATE_SELECT Assert Time Hardware RATE_SELECT DeAssert Time Software TX_DISABLE Assert Time Software TX_DISABLE Negate Time Software Tx_FAULT Assert Time Software Rx_LOS Assert Time Software Rx_LOS De-Assert Time Software RATE_SELECT Assert Time Software RATE_SELECT DeAssert Time Analog parameter data ready Serial bus hardware ready Write Cycle Time Serial ID Clock Rate Symbol t_off t_on t_init t_fault t_reset t_loss_on t_loss_off t_rate_high t_rate_low t_off_soft t_on_soft t_fault_soft t_loss_on_soft t_loss_off_soft t_rate_soft_high t_rate_soft_low t_data t_serial t_write f_serial_clock 10 100 100 10 10 100 100 100 100 100 1 1 1000 300 10 100 Minimum Maximum 10 1 300 100 Unit s ms ms s s s s s s ms ms ms ms ms ms ms ms ms ms kHz Notes Note 1 Note 2 Note 3 Note 4 Note 5 Note 6 Note 7 Note 8 Note 8 Note 9 Note 10 Note 11 Note 12 Note 13 Note 14 Note 14 Note 15 Note 16 Note 17
Notes 1. Time from rising edge of TX_DISABLE to when the optical output falls below 10% of nominal. 2. Time from falling edge of TX_DISABLE to when the modulated optical output rises above 90% of nominal. 3. Time from power on or falling edge of Tx_Disable to when the modulated optical output rises above 90% of nominal. 4. From power on or negation of TX_FAULT using TX_DISABLE. 5. Time TX_DISABLE must be held high to reset the laser fault shutdown circuitry. 6. Time from loss of optical signal to Rx_LOS Assertion. 7. Time from valid optical signal to Rx_LOS De-Assertion. 8. Time from rising or falling edge of Rate_Select input until transceiver is in conformance with appropriate specification. 9. Time from two-wire interface assertion of TX_DISABLE (A2h, byte 110, bit 6) to when the optical output falls below 10% of nominal. Measured from falling clock edge after stop bit of write transaction. 10. Time from two-wire interface de-assertion of TX_DISABLE (A2h, byte 110, bit 6) to when the modulated optical output rises above 90% of nominal. 11. Time from fault to two-wire interface TX_FAULT (A2h, byte 110, bit 2) asserted. 12. Time for two-wire interface assertion of Rx_LOS (A2h, byte 110, bit 1) from loss of optical signal. 13. Time for two-wire interface de-assertion of Rx_LOS (A2h, byte 110, bit 1) from presence of valid optical signal. 14. Time from two-wire interface selection of Rate_Select input (A2h, byte 110, bit 3) write STOP condition until completion of the receiver bandwidth switch 15. From power on to data ready bit asserted (A2h, byte 110, bit 0). Data ready indicates analog monitoring circuitry is functional. 16. Time from power on until module is ready for data transmission over the serial bus (reads or writes over A0h and A2h). 17. Time from stop bit to completion of a 1-8 byte write command.
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Table 10. Transceiver Digital Diagnostic Monitor (Real Time Sense) Characteristics
(TC = -40C to 85C, VccT, VccR = 3.3V 10%) Parameter Transceiver Internal Temperature Accuracy Transceiver Internal Supply Voltage Accuracy Transmitter Laser DC Bias Current Accuracy Transmitted Average Optical Output Power Accuracy Received Average Optical Input Power Accuracy Symbol TINT VINT IINT PT PR Min 3.0 0.1 10 3.0 3.0 Units C V % dB dB Notes Temperature is measured internal to the transceiver. Valid from = -40C to 85 C case temperature. Supply voltage is measured internal to the transceiver and can, with less accuracy, be correlated to voltage at the SFP Vcc pin. Valid over 3.3 V 10%. IINT is better than 10% of the nominal value. Coupled into single-mode fiber. Valid from 100 uW to 500 uW, avg. Coupled from single-mode fiber. Valid from 15 uW to 500 uW, avg.
Description of the Digital Diagnostic Data Transceiver Internal Temperature
Temperature is measured on the AFCT-57J5APZ using sensing circuitry mounted on the internal PCB. The measured temperature will generally be cooler than laser junction and warmer than SFP case and can be indirectly correlated to SFP case or laser junction temperature using thermal resistance and capacitance modeling. This measurement can be used to observe drifts in thermal operating point or to detect extreme temperature fluctuations such as a failure in the system thermal control. For more information on correlating internal temperature to case or laser junction contact Avago Technologies. and supply voltage operating points. The AFCT-57J5APZ uses a closed loop laser bias feedback circuit to maintain constant optical power. This circuit compensates for normal FABRY PEROT parametric variations in quantum efficiency, forward voltage and lasing threshold due to changing transceiver operating points. Consistent increases in laser bias current observed at equilibrium temperature and supply voltage could be an indication of laser degradation. For more information on using laser bias current for predicting laser lifetime, contact Avago Technologies.
Transceiver Internal Supply Voltage
Supply voltage is measured on the AFCT-57J5APZ using sensing circuitry mounted on the internal PCB. Transmit supply voltage (VccT) is monitored for this readback. The resultant value can be indirectly correlated to SFP VccT or VccR pin supply voltages using resistance modeling, but not with the required accuracy of SFF-8472. Supply voltage as measured will be generally lower than SFP Vcc pins due to use of internal transient suppression circuitry. As such, measured values can be used to observe drifts in supply voltage operating point, be empirically correlated to SFP pins in a given host application or used to detect supply voltage fluctuations due to failure or fault in the system power supply environment. For more information on correlating internal supply voltage to SFP pins contact Avago Technologies.
Transmitted Average Optical Output Power
Transmitted average optical power is measured using sensing circuitry located on the transmitter laser driver IC and laser optical subassembly. Variations in average optical power are not expected under normal operation because the AFCT-57J5APZ uses a closed loop laser bias feedback circuit to maintain constant optical power. This circuit compensates for normal FABRY PEROT parametric variations due to changing transceiver operating points. Only under extreme laser bias conditions will significant drifting in transmitted average optical power be observable. Therefore it is recommended Tx average optical power be used for fault isolation, rather than predictive failure purposes.
Received Average Optical Input Power
Received average optical power is measured using detecting circuitry located on the receiver preamp and quantizer ICs. Accuracy is +/- 3.0 dB, but typical accuracy is +/- 2.0 dB. This measurement can be used to observe magnitude and drifts in incoming optical signal level for detecting cable plant or remote transmitter problems.
Transmitter Laser DC Bias Current
Laser bias current is measured using sensing circuitry located on the transmitter laser driver IC. Normal variations in laser bias current are expected to accommodate the impact of changing transceiver temperature 12
VCCT,R > 2.97 V TX_FAULT TX_DISABLE TRANSMITTED SIGNAL t_init
VCCT,R > 2.97 V TX_FAULT TX_DISABLE TRANSMITTED SIGNAL t_init
t-init: TX DISABLE NEGATED
t-init: TX DISABLE ASSERTED
VCCT,R > 2.97 V
TX_FAULT TX_DISABLE TRANSMITTED SIGNAL t_init INSERTION
TX_FAULT TX_DISABLE TRANSMITTED SIGNAL t_off t_on
t-init: TX DISABLE NEGATED, MODULE HOT PLUGGED
t-off & t-on: TX DISABLE ASSERTED THEN NEGATED
OCCURANCE OF FAULT TX_FAULT TX_DISABLE TRANSMITTED SIGNAL t_fault
OCCURANCE OF FAULT TX_FAULT TX_DISABLE TRANSMITTED SIGNAL
* SFP SHALL CLEAR TX_FAULT IN < t_init IF THE FAILURE IS TRANSIENT
t_reset
t_init*
t-fault: TX FAULT ASSERTED, TX SIGNAL NOT RECOVERED
t-reset: TX DISABLE ASSERTED THEN NEGATED, TX SIGNAL RECOVERED
OCCURANCE OF FAULT TX_FAULT TX_DISABLE TRANSMITTED SIGNAL t_fault
* SFP SHALL CLEAR TX_FAULT IN < t_init IF THE FAILURE IS TRANSIENT
OCCURANCE OF LOSS
LOS
t_loss_on t_loss_off
t_reset t_init*
t-fault: TX DISABLE ASSERTED THEN NEGATED, TX SIGNAL NOT RECOVERED
t-loss-on & t-loss-off
Figure 4. Transceiver Timing Diagrams (Module Installed Except Where Noted)
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Table 12. EEPROM Serial ID Memory Contents - Conventional SFP Memory (Address A0h)
Byte # Decimal 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Data Hex 03 04 07 00 00 00 00 0A 00 01 00 01 1F 00 08 50 00 00 00 00 41 56 41 47 4F 20 20 20 20 20 20 20 20 20 20 20 00 Notes SFP physical device SFP function defined by serial ID only LC optical connector Byte # Decimal 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68-83 84-91 92 93 94 95 96 - 255 Data Hex 00 17 6A 41 46 43 54 2D 35 37 4A 35 41 50 5A 20 20 20 20 20 20 20 20 05 1E 00 00 1A 00 50 Notes Hex Byte of Vendor OUI 1 Hex Byte of Vendor OUI 1 Hex Byte of Vendor OUI 1 "A" - Vendor Part Number ASCII character "F" - Vendor Part Number ASCII character "C" - Vendor Part Number ASCII character "T" - Vendor Part Number ASCII character "-" - Vendor Part Number ASCII character "5" - Vendor Part Number ASCII character "7" - Vendor Part Number ASCII character "J" - Vendor Part Number ASCII character "5" - Vendor Part Number ASCII character "A" - Vendor Part Number ASCII character " P" - Vendor Part Number ASCII character " Z" - Vendor Part Number ASCII character " " - Vendor Part Number ASCII character " " - Vendor Part Number ASCII character " " - Vendor Part Number ASCII character " " - Vendor Part Number ASCII character " " - Vendor Part Number ASCII character " " - Vendor Part Number ASCII character " " - Vendor Part Number ASCII character " " - Vendor Part Number ASCII character Hex Byte of Laser Wavelength 2 Hex Byte of Laser Wavelength 2 Checksum for Bytes 0-62 3 Hardware SFP TX_DISABLE, TX_FAULT & RX_LOS 80% below nominal rate tolerated (0.614 Gb/s) Vendor Serial Number ASCII characters 4 Vendor Date Code ASCII characters 5 Digital Diagnostics, Internal Cal, Rx Pwr Avg A/W, Soft SFP TX_DISABLE, TX_FAULT & RX_LOS SFF-8472 Compliance to revision 10 Checksum for Bytes 64-94 3
Medium distance Single mode optical media Compatible with 8B/10B encoded data 3100 MBit/sec nominal bit rate (3.072 Gbit/s) 8 km of single mode fiber @ 3.1GBit/sec 8 km of single mode fiber @ 3.1GBit/sec
"A" - Vendor Name ASCII character "V" - Vendor Name ASCII character "A" - Vendor Name ASCII character "G" - Vendor Name ASCII character "O" - Vendor Name ASCII character " " - Vendor Name ASCII character " " - Vendor Name ASCII character " " - Vendor Name ASCII character " " - Vendor Name ASCII character " " - Vendor Name ASCII character " " - Vendor Name ASCII character " " - Vendor Name ASCII character " " - Vendor Name ASCII character " " - Vendor Name ASCII character " " - Vendor Name ASCII character " " - Vendor Name ASCII character
68 F0 03 00
Notes: 1. The IEEE Organizationally Unique Identifier (OUI) assigned to Avago Technologies is 00-17-6A (3 bytes of hex). 2. Laser wavelength is represented in 16 unsigned bits. The hex representation of 1310 (nm) is 051E. 3. Addresses 63 and 95 are checksums calculated (per SFF-8472 and SFF-8074) and stored prior to product shipment. 4. Addresses 68-83 specify the AFCT-57J5APZ ASCII serial number and will vary on a per unit basis. 5. Addresses 84-91 specify the AFCT-57J5APZ ASCII date code and will vary on a per date code basis.
14
Table 13. EEPROM Serial ID Memory Contents - Enhanced Feature Set Memory (Address A2h)
Byte # Decimal 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Notes Temp H Alarm MSB 1 Temp H Alarm LSB 1 Temp L Alarm MSB 1 Temp L Alarm LSB 1 Temp H Warning MSB 1 Temp H Warning LSB 1 Temp L Warning MSB 1 Temp L Warning LSB 1 Vcc H Alarm MSB 2 Vcc H Alarm LSB 2 Vcc L Alarm MSB 2 Vcc L Alarm LSB 2 Vcc H Warning MSB 2 Vcc H Warning LSB 2 Vcc L Warning MSB 2 Vcc L Warning LSB 2 Tx Bias H Alarm MSB 3 Tx Bias H Alarm LSB 3 Tx Bias L Alarm MSB 3 Tx Bias L Alarm LSB 3 Tx Bias H Warning MSB 3 Tx Bias H Warning LSB 3 Tx Bias L Warning MSB 3 Tx Bias L Warning LSB 3 Tx Pwr H Alarm MSB 4 Tx Pwr H Alarm LSB 4 Byte # Decimal 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40-55 56-94 95 96 97 98 99 100 101 102 103 Notes Tx Pwr L Alarm MSB 4 Tx Pwr L Alarm LSB 4 Tx Pwr H Warning MSB 4 Tx Pwr H Warning LSB 4 Tx Pwr L Warning MSB 4 Tx Pwr L Warning LSB 4 Rx Pwr H Alarm MSB 5 Rx Pwr H Alarm LSB 5 Rx Pwr L Alarm MSB 5 Rx Pwr L Alarm LSB 5 Rx Pwr H Warning MSB 5 Rx Pwr H Warning LSB 5 Rx Pwr L Warning MSB 5 Rx Pwr L Warning LSB 5 Reserved External Calibration Constants 6 Checksum for Bytes 0-94 7 Real Time Temperature MSB 1 Real Time Temperature LSB 1 Real Time Vcc MSB 2 Real Time Vcc LSB 2 Real Time Tx Bias MSB 3 Real Time Tx Bias LSB 3 Real Time Tx Power MSB 4 Real Time Tx Power LSB 4 Byte # Decimal 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118-127 128-247 248-255 Notes Real Time Rx Pwr MSB 5 Real Time Rx Pwr LSB 5 Reserved Reserved Reserved Reserved Status/Control - See Table 14 Reserved Flag Bits - See Table 15 Flag Bits - See Table 15 Reserved Reserved Flag Bits - See Table 15 Flag Bits - See Table 15 Reserved Customer Writeable Vendor Specific
Notes: 1. Temperature (Temp) is decoded as a 16 bit signed twos compliment integer in increments of 1/256 degrees C. 2. Supply Voltage (Vcc) is decoded as a 16 bit unsigned integer in increments of 100 uV. 3. Laser bias current (Tx Bias) is decoded as a 16 bit unsigned integer in increments of 2 uA. 4. Transmitted average optical power (Tx Pwr) is decoded as a 16 bit unsigned integer in increments of 0.1 uW. 5. Received average optical power (Rx Pwr) is decoded as a 16 bit unsigned integer in increments of 0.1 uW. 6. Bytes 55-94 are not intended for use with AFCT-57J5APZ, but have been set to default values per SFF-8472. 7. Byte 95 is a checksum calculated (per SFF-8472) and stored prior to product shipment.
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Table 14. EEPROM Serial ID Memory Contents - Soft Commands (Address A2h, Byte 110)
Bit # 7 6 5 4 3 2 1 0 Status/Control Name TX_ DISABLE State Soft TX_ DISABLE reserved reserved reserved TX_FAULT State RX_LOS State Data Ready (Bar) Digital state of the SFP TX_FAULT Output Pin (1 = TX_FAULT asserted) Digital state of the SFP RX_LOS Output Pin (1 = RX_LOS asserted) Indicates transceiver is powered and real time sense data is ready. (0 = Ready) Note 1 Note 1 Note 1 Description Digital state of SFP TX_ DISABLE Input Pin (1 = TX_DISABLE asserted) Read/write bit for changing digital state of TX_DISABLE function Notes Note 1 Note 1,2
Notes: 1. The response time for soft commands of the AFCT-57J5APZ is 100 msec as specified by the MSA SFF-8472 2. Bit 6 is logic OR'd with the SFP TX_DISABLE input pin 3 ... either asserted will disable the SFP transmitter.
Table 15. EEPROM Serial ID Memory Contents - Alarms and Warnings (Address A2h, Bytes 112, 113, 116, 117)
Byte 112 Bit 7 6 5 4 3 2 1 0 113 7 6 0-5 116 7 6 5 4 3 2 1 0 117 7 6 0-5 Flag Bit Name Temp High Alarm Temp Low Alarm Vcc High Alarm Vcc Low Alarm Tx Bias High Alarm Tx Bias Low Alarm Tx Power High Alarm Tx Power Low Alarm Rx Power High Alarm Rx Power Low Alarm reserved Temp High Warning Temp Low Warning Vcc High Warning Vcc Low Warning Tx Bias High Warning Tx Bias Low Warning Tx Power High Warning Tx Power Low Warning Rx Power High Warning Rx Power Low Warning reserved Set when transceiver internal temperature exceeds high warning threshold. Set when transceiver internal temperature exceeds low warning threshold. Set when transceiver internal supply voltage exceeds high warning threshold. Set when transceiver internal supply voltage exceeds low warning threshold. Set when transceiver laser bias current exceeds high warning threshold. Set when transceiver laser bias current exceeds low warning threshold. Set when transmitted average optical power exceeds high warning threshold. Set when transmitted average optical power exceeds low warning threshold. Set when received average optical power exceeds high warning threshold. Set when received average optical power exceeds low warning threshold. Description Set when transceiver internal temperature exceeds high alarm threshold. Set when transceiver internal temperature exceeds low alarm threshold. Set when transceiver internal supply voltage exceeds high alarm threshold. Set when transceiver internal supply voltage exceeds low alarm threshold. Set when transceiver laser bias current exceeds high alarm threshold. Set when transceiver laser bias current exceeds low alarm threshold. Set when transmitted average optical power exceeds high alarm threshold. Set when transmitted average optical power exceeds low alarm threshold. Set when received average optical power exceeds high alarm threshold. Set when received average optical power exceeds low alarm threshold.
16
Figure 5 . Module drawing
17
Y
X
34.5 10 3x 10x 1.05 0.01 0.1 L X A S 1 B 7.2 2.5 2.5 A 3.68 7.1 0.85 0.05 0.1 S X Y 1
16.25 MIN. PITCH PCB EDGE
11.08 16.25 REF. 14.25
8.58
5.68
PIN 1
20
2x 1.7
8.48 9.6
11.93
10
11
4.8
SEE DETAIL 1 2.0 11x 26.8 3 41.3 42.3 10 3x 5 11x 2.0 9x 0.95 0.05 0.1 L X A S 2
3.2
5 0.9 20x 0.5 0.03 0.06 L A S B S
PIN 1
20
LEGEND 10.53 11.93 1. PADS AND VIAS ARE CHASSIS GROUND 2. THROUGH HOLES, PLATING OPTIONAL
10.93 9.6 0.8 TYP.
10
11
3. HATCHED AREA DENOTES COMPONENT AND TRACE KEEPOUT (EXCEPT CHASSIS GROUND) 2 0.005 TYP. 0.06 L A S B S DETAIL 1 4. AREA DENOTES COMPONENT KEEPOUT (TRACES ALLOWED) DIMENSIONS ARE IN MILLIMETERS
4 2x 1.55 0.05 0.1 L A S B S
Figure 6. SFP host board mechanical layout
18
1.7 0.9 3.5 0.3 41.78 0.5 CASE TEMPERATURE MEASUREMENT POINT
CAGE ASSEMBLY
15 MAX.
11.73 REF 15.25 0.1
9.8 MAX.
10 REF (to PCB)
10.4 0.1
PCB
0.4 0.1 (below PCB) 16.25 0.1 MIN. PITCH
DIMENSIONS ARE IN MILLIMETERS
Figure 7 . SFP Assembly Drawing
For product information and a complete list of distributors, please go to our web site:
www.avagotech.com
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Limited in the United States and other countries. Data subject to change. Copyright (c) 2007 Avago Technologies Limited. All rights reserved. AV02-0680EN - September 11, 2007

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