Features
• Compliant to Restriction on Hazardous Substances
(RoHS) directive
• Rate Select not required
• Diagnostic features per SFF-8472 “Diagnostic
Monitoring Interface for Optical Transceivers”
• Real time monitoring of:
– Transmitted optical power
– Received optical power
– Laser bias current
– Temperature
– Supply voltage
• SFP Plus Mechanical Applications
• Wide temperature and supply voltage operation
(-10°C to 85°C) (3.3 V ± 10%)
• Transceiver specications per SFP (SFF-8074i) Multi-
Source Agreement and SFF-8472 (revision 10.3)
– 8.5 GBd Fibre Channel operation for FC-PI-4
800-M5-SN-S, 800-M6-SN-S and 800-M5E-SN-I
– 4.25 GBd Fibre Channel operation for FC-PI
400-M5-SN-I , 400-M6-SN-I and 400 M5E-SN-I
– 2.125 GBd Fibre Channel operation for FC-PI
200-M5-SN-I , 200-M6-SN-I and 200 M5E-SN-I
• Link lengths at 8.5 GBd: 21m with 62.5um OM1,
50m with 50um OM2, 150m with 50um OM3,
190m with 50um OM4
• Link lengths at 4.25 GBd: 70m with 62.5um OM1,
150m with 50um OM2, 380m with 50um OM3,
400m with 50um OM4
• Link lengths at 2.125 GBd: 150m with 62.5um OM1,
300m with 50um OM2, 500m with 50um OM3
• LC Duplex optical connector interface conforming to
ANSI TIA/EIA604-10 (FOCIS 10A)
• 850 nm Vertical Cavity Surface Emitting Laser (VCSEL)
source technology
• IEC 60825-1 Class 1/CDRH Class 1 laser eye safe
• Enhanced EMI performance for high port density ap-
plications
Description
Avago Technologies’ AFBR-57D9AMZ optical transceiver
supports high-speed serial links over multimode optical
ber at signaling rates up to 8.5 GBd. Compliant with
Small Form Pluggable (SFP) Multi Source Agreement (MSA)
mechanical and electrical specications for LC Duplex
transceivers, ANSI Fibre Channel for FC-PI-4 and FC-PI-2 for
gigabit applications. The part is electrically interoperable
with SFP conformant devices.
The AFBR-57D9AMZ is a multi-rate 850nm SFP which
ensures compliance to 8.5/4.25/2.125 GBd Fibre Channel
specications without the need for Rate Select. The AFBR-
57D9AMZ will ignore both Rate Select pin and control bit
inputs (ie. no connect inside the SFP). This simplies Fibre
Channel host auto-negotiation algorithms, layout and
software.
Related Products
• AFBR-59R5LZ: 850 nm + 3.3 V LC SFF 2x7
for 4.25/2.125/1.0625 GBd Fibre Channel
• AFBR-57R5APZ: 850 nm + 3.3 V LC SFP
for 4.25/2.125/1.0625 GBd Fibre Channel
• AFCT-57D5APZ: 1310nm FP + 3.3v LC SFP
for 8.5/4.25/2.125 GBd Fibre Channel
• AFCT-57D5ATPZ: 1310nm DFB + 3.3v LC SFP
for 8.5/4.25/2.125 GBd Fibre Channel
AFBR-57D9AMZ
Digital Diagnostic SFP, 850 nm, 8.5/4.25/2.125 GBd
Low Voltage (3.3 V) Fibre Channel
RoHS Compliant Optical Transceiver
Data Sheet
AFBR-57D9AMZ
Patent - www.avagotech.com/patents
2
Description, continued
As an enhancement to the conventional SFP interface
dened in SFF-8074i, the AFBR-57D9AMZ is compliant
to SFF-8472 (digital diagnostic interface for optical trans-
ceivers). Using the 2-wire serial interface dened in the
SFF-8472 MSA, the AFBR-57D9AMZ provides real time
temperature, supply voltage, laser bias current, laser
average output power and received input power. This in-
formation is in addition to conventional SFP base data. The
digital diagnostic interface also adds the ability to disable
the transmitter (TX_DISABLE), monitor for Transmitter
Faults (TX_FAULT), and monitor for Receiver Loss of Signal
(RX_LOS).
Installation
The AFBR-57D9AMZ can be installed in any SFF-8074i
compliant Small Form Pluggable (SFP) port regardless of
host equipment operating status. The AFBR-57D9AMZ is
hot-pluggable, allowing the module to be installed while
the host system is operating and on-line. Upon insertion,
the transceiver housing makes initial contact with the
host board SFP cage, mitigating potential damage due to
Electro-Static Discharge (ESD).
Digital Diagnostic Interface and Serial Identication
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 SFF-8074i. New digital
diag nostic information, bytes 0-255 at memory address
0xA2, is compliant to SFF-8472. The new diagnostic in-
formation provides the opportunity for Predictive Failure
Identication, Com pliance Prediction, Fault Isolation and
Component Monitoring.
Predictive Failure Identication
The AFBR-57D9AMZ predictive failure feature allows a host
to identify potential link problems before system perfor-
mance is impacted. Prior identication of link problems
enables a host to service an application via “fail over” to
a redundant link or replace a suspect device, maintain-
ing 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 asso ciated
with observing laser degradation and predicting failure:
average laser bias current (Tx_Bias) and average laser
optical power (Tx_Power).
Compliance Prediction
Compliance prediction is the ability to determine if an
optical transceiver is operating within its operating and
environmental requirements. AFBR-57D9AMZ devices
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 trans-
mission.
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. AFBR-57D9AMZ real-time monitors of
Tx_Bias, Tx_Power, Vcc, Temperature and Rx_Power can be
used to assess local transceiver current operating condi-
tions. In addition, status ags Tx_Disable and Rx Loss of
Signal (LOS) are mirrored in memory and available via the
two-wire serial interface.
Component Monitoring
Component evaluation is a more casual use of the
AFBR-57D9AMZ 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
qualication. For example, temperature per module can be
observed in high density applications to facilitate thermal
evaluation of blades, PCI cards and systems.
3
Figure 1. Transceiver functional diagram.
Transmitter Section
The transmitter section includes the Transmitter Optical
SubAssembly (TOSA) and laser driver circuitry. The TOSA,
containing an 850 nm VCSEL (Vertical Cavity Surface
Emitting Laser) 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
dierential 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).
Transmit Disable (Tx_Disable)
The AFBR-57D9AMZ accepts a TTL and CMOS compat-
ible 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 10 ms interval
between successive assertions of this control signal.
Tx_Disable can also be asserted via the two-wire 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.
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 AFBR-57D9AMZ 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 certication.
Such unsafe conditions can be due to inputs from the host
board (Vcc uctuation, unbalanced code) or a fault within
the transceiver.
LIGHT FROM FIBER
LIGHT TO FIBER
PHOTO-DETECTOR
RECEIVER
AMPLIFICATION
& QUANTIZATION
RD+ (RECEIVE DATA)
RD- (RECEIVE DATA)
Rx LOSS OF SIGNAL
VCSEL
TRANSMITTER
LASER
DRIVER &
SAFETY
CIRCUITRY
TX_DISABLE
TD+ (TRANSMIT DATA)
TD- (TRANSMIT DATA)
TX_FAULT
ELECTRICAL INTERFACE
MOD-DEF2 (SDA)
MOD-DEF1 (SCL)
MOD-DEF0
CONTROLLER & MEMORY
OPTICAL INTERFACE
4
Receiver Section
The receiver section includes the Receiver Optical SubAs-
sembly (ROSA) and the amplication/quantization circuitry.
The ROSA, containing a PIN photodiode and custom tran-
simpedance amplier, 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-amplication and
quantization.
Receiver Loss of Signal (Rx_LOS)
The post-amplication 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 denite optical
fault has occurred. Rx_LOS can also be monitored via the
two-wire serial interface (address A2h, byte 110, bit 1).
Functional Data I/O
The AFBR-57D9AMZ interfaces with the host circuit
board through twenty I/O pins (SFP electrical connector)
identied by function in Table 2. The board layout for this
interface is depicted in Figure 6.
The AFBR-57D9AMZ high speed transmit and receive
interfaces require SFP MSA 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 SFF-8074i) and hence are
not required on the host board. The Tx_Disable, Tx_Fault,
and Rx_LOS lines require TTL lines on the host board (per
SFF-8074i) 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).
Figure 2 depicts the recom mended interface circuit to
link the AFBR-57D9AMZ to supporting physical layer ICs.
Timing for MSA compliant control signals implemented in
the transceiver are listed in Figure 4.
Application Support
An Evaluation Kit and Reference Designs are available to
assist in evaluation of the AFBR-57D9AMZ. Please contact
your local Field Sales representative for availability and
ordering details.
Caution
There are no user serviceable parts nor maintenance
requirements for the AFBR-57D9AMZ. All mechanical
adjustments are made at the factory prior to shipment.
Tampering with, modifying, misusing or improp-
erly handling the AFBR-57D9AMZ will void the product
warranty. It may also result in improper operation and
possibly overstress the laser source. Performance degrada-
tion or device failure may result. Connection of the AFBR-
57D9AMZ to a light source not compliant with ANSI FC-PI
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 manu-
facturing 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.
Ordering Information
Please contact your local eld sales engineer or one of
Avago Technologies franchised distributors for ordering
information. For technical information, please visit Avago
Technologies’ WEB page at www.avagotech.com or contact
Avago Technologies Semicon-ductor Products Customer
Response Center at 1-800-235-0312. For information
related to SFF Committee documentation visit www.scom-
mittee.org.
Regulatory Compliance
The AFBR-57D9AMZ complies with all applicable laws
and regulations as detailed in Table 1. Certication level
is dependent on the overall conguration of the host
equipment. The transceiver performance is oered as a
gure of merit to assist the designer.
Electrostatic Discharge (ESD)
The AFBR-57D9AMZ 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 circum-
stances.
The rst 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 pre-cautions.
These include use of grounded wrist straps, work-benches
and oor 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.
5
Table 1. Regulatory Compliance
Feature Test Method Performance
Electrostatic Discharge (ESD)
to the Electrical Pins
MIL-STD-883C
Method 3015.4
Class 1 (> 2000 Volts)
Electrostatic Discharge (ESD)
to the Duplex LC Receptacle
IEC 61000-4-2 Typically, no damage occurs with 25 kV when
the duplex LC connector receptacle is con-
tacted by a Human Body Model probe.
IEC 61000-4-2 10 contacts of 8 kV on the electrical faceplate
with device inserted into a panel.
Electrostatic Discharge (ESD)
to the Optical Connector
IEC 61000-4-2 Air discharge of 15 kV (min.)
contact to connector without damage.
Electromagnetic Interference
(EMI)
FCC Class B
CENELEC EN55022 Class B
(CISPR 22A)
VCCI Class A
System margins are dependent on customer
board and chassis design.
Immunity IEC 61000-4-3 Typically shows no measurable eect from a
10 V/m eld swept from 10 MHz to 1 GHz.
Laser Eye Safety and
Equipment Type Testing
US FDA CDRH AEL Class 1
US21 CFR, Subchapter J per
Paragraphs 1002.10
and 1002.12
(IEC) EN 60825-1: 2007
(IEC) EN 60825-2: 2004+A1
(IEC) EN 60950-1: 2006+A11
CDRH Certication No.: 9720151-128
TUV le: R 72121699
Component Recognition Underwriters Laboratories and Canadian
Standards Association Joint Component
Recognition for Information Technology
Equipment including Electrical Business
Equipment
UL le: E173874, Vol. 1
RoHS Compliance RoHS Directive 2002/95/EC and
it’s amendment directives 6/6
SGS Test Report No. LPC/13392 (AD-1)/07
CTS Ref. CTS/07/3283/Avago
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 AFBR-57D9AMZ’s compliance to these standards is
detailed in Table 1. The metal housing and shielded design
of the AFBR-57D9AMZ minimizes the EMI challenge facing
the equipment designer.
EMI Immunity (Susceptibility)
Due to its shielded design, the EMI immunity of the AFBR-
57D9AMZ exceeds typical industry standards.
Flammability
The AFBR-57D9AMZ optical transceiver is made of metal
and high strength, heat resistant, chemical resistant and
UL 94V-0 ame retardant plastic.
BAUART
GEPRUFT
TYPE
APPROVED
TUV
Rheinland
Product Safety
¬
¬
6
Figure 2. Typical application conguration.
Figure 3. Recommended power supply lter.
4.7 µH
4.7 µH
0.1 µF
VCC R
SFP MODULE
22 µF
VCC T
0.1 µF
0.1 µF
3.3 V
HOST BOARD
0.1 µF
NOTE: INDUCTORS MUST HAVE LESS THAN 1Ω SERIES RESISTANCE TO LIMIT VOLTAGE DROP TO THE SFP MODULE.
22 µF
LASER DRIVER
MODULE DETECT
LOSS OF SIGNAL
SCL
SDA
Tx_FAULT
Tx_DISABLE
TD+
Tx FAULT
Tx DIS
TD-
RD+
RD-
MOD_DEF2
MOD_DEF1
MOD_DEF0
GND,R
4.7 k to
10 kΩ50 Ω
50 Ω
4.7 k to 10 kΩ4.7 k to 10 kΩ
PROTOCOL IC
V
CC
,T
V
CC
,T
V
CC
,R
µF
3.3 V
SERDES IC
Rx LOS
GND,T
0.1 µF
0.1 µF
POST AMPLIFIER
100 Ω
4.7 k to 10 kΩ
100 Ω
10 kΩ
0.1 µF
V
CC
,R
0.1 µF
4.7 k to 10 kΩ
V
CC
,R
4.7 µH
22 µF
3.3 V
4.7 µH
0.1 µF0.1 µF
22 µF 0.1 µF0.1 µF
7
Notes:
1. TX_FAULT is an open collector/drain output, which must be pulled up with a 4.7 k – 10 kΩ 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 < 0.8 V.
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 6.8 kΩ
resistor.
Low (0 – 0.8 V): Transmitter on
Between (0.8 V and 2.0 V): Undened
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 4.7 k – 10 kΩ 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 4.7 k – 10 kΩ resistor on the host board. When high,
this output indicates the received optical power is below the worst case receiver sensitivity (as dened by the standard in use). Low indicates
normal operation. In the low state, the output will be pulled to < 0.8 V.
5. RD-/+ designate the dierential receiver outputs. They are AC coupled 100 Ω dierential lines which should be terminated with 100 Ω dier-
ential 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 370 and 850 mV dierential (185 – 425 mV single ended) when properly terminated.
6. VccR and VccT are the receiver and transmitter power supplies. They are dened 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 2 microseconds.
7. TD-/+ designate the dierential transmitter inputs. They are AC coupled dierential lines with 100 Ω dierential termination inside the module.
The AC coupling is done inside the module and is not required on the host board. The inputs will accept dierential swings of 180 – 1200 mV
(90 – 600 mV single ended)
Table 2. Pin Description
Pin Name Function/Description Notes
1 VeeT Transmitter Ground
2 TX_FAULT Transmitter Fault Indication – High indicates a fault condition Note 1
3 TX_DISABLE Transmitter Disable – Module electrical input disables on high or open Note 2
4 MOD-DEF2 Module Denition 2 – Two wire serial ID interface data line (SDA) Note 3
5 MOD-DEF1 Module Denition 1 – Two wire serial ID interface clock line (SCL) Note 3
6 MOD-DEF0 Module Denition 0 – Grounded in module (module present indicator) Note 3
7 No Connect Internal pullup 30K Ω to Vcc
8 RX_LOS Loss of Signal – High indicates loss of received optical signal Note 4
9 No Connect Internal pullup 30K Ω to Vcc
10 VeeR Receiver Ground
11 VeeR Receiver Ground
12 RD- Inverse Received Data Out Note 5
13 RD+ Received Data Out Note 5
14 VeeR Receiver Ground
15 VccR Receiver Power + 3.3 V Note 6
16 VccT Transmitter Power + 3.3 V Note 6
17 VeeT Transmitter Ground
18 TD+ Transmitter Data In Note 7
19 TD- Inverse Transmitter Data In Note 7
20 VeeT Transmitter Ground
8
Table 3. Absolute Maximum Ratings
Parameter Symbol Minimum Maximum Unit Notes
Storage Temperature TS -40 85 C Note 1, 2
Case Operating Temperature TC -40 85 C Note 1, 2
Relative Humidity (Non condensing) RH 5 95 % Note 1
Supply Voltage VccT, R -0.5 3.8 V Note 1, 2, 3
Low Speed Input Voltage VIN -0.5 Vcc+0.5 V 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 specic 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 dier by more than 0.5 V or damage to the device may occur.
Table 4. Recommended Operating Conditions
Parameter Symbol Minimum Maximum Unit Notes
Case Operating Temperature TC -10 85 °C Note 1, 2
Supply Voltage VccT, R 2.97 3.63 V Note 2
Data Rate 2.125 8.5 Gb/s 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 = -10°C to 85°C, VccT, VccR = 3.3 V ±10%)
Parameter Symbol Minimum Typical Maximum Unit Notes
AC Electrical Characteristics
Power Supply Noise Rejection (peak-peak) PSNR 100 mV Note 1
10Hz to 10MHz
DC Electrical Characteristics
Module Supply Current ICC 235 mA
Power Dissipation PDISS 825 mW
Low Speed Outputs: VOH 2.0 VccT,R+0.3 V Note 2
Transmit Fault (TX_FAULT), Loss of Signal VOL 0.4 V
(RX_LOS), MOD-DEF 2
Low Speed Inputs: VIH 2.0 Vcc V Note 3
Transmit Disable (TX_DIS), MOD-DEF 1, VIL 0 0.8 V
MOD-DEF2,
Notes:
1. Filter per SFP specication is required on host board to remove 10 Hz to 2 MHz content.
2. Pulled up externally with a 4.7 k – 10 kΩ resistor on the host board to 3.3 V.
3. Mod-Def1 and Mod-Def2 must be pulled up externally with a 4.7 k – 10 kΩ resistor on the host board to 3.3 V.
9
Table 6. Transmitter and Receiver Electrical Characteristics
(TC = -10°C to 85°C, VccT, VccR = 3.3 V ±10%)
Parameter Symbol Minimum Typical Maximum Unit Notes
High Speed Data Input: VI 180 1200 mV Note 1
Transmitter Dierential Input Voltage (TD +/-)
High Speed Data Output: Vo 370 850 mV Note 2
Receiver Dierential Output Voltage (RD +/-)
Receiver Total Jitter (8.5 Gb/s) TJ 0.71 UI Note 4
83.5 ps
Receiver Deterministic Jitter (8.5 Gb/s) DJ 0.42 UI
49.4 ps
Receiver Data Dependent Pulse DDPWS 0.36 UI
Width Shrinkage (8.5 Gb/s) 42.4 ps
Receiver Contributed Total Jitter TJ 0.26 UI Note 3
(4.25 Gb/s) 61.8 ps
Receiver Contributed Total Jitter TJ 0.26 UI Note 3
(2.125 Gb/s) 123.5 ps
Notes:
1. Internally AC coupled and terminated (100 Ohm dierential).
2. Internally AC coupled but requires an external load termination (100 Ohm dierential).
3. Contributed DJ is measured on an oscilloscope in average mode with 50% threshold and K28.5 pattern. Contributed TJ is the sum of contributed
RJ and contributed DJ. 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. Per FC-PI-4 (Table 13 - MM jitter output, note 1), the actual contributed RJ is allowed to increase above its limit if the actual
contributed DJ decreases below its limits, as long as the component output DJ and TJ remain within their specied FC-PI-4 maximum limits with
the worst case specied component jitter input.
4. Receiver output jitter for 8.5 Gb/s is specied dierently than other data rates. Incoming optical jitter is controlled by TWDP and stressed receiver
sensitivity - and is not explicitly dened. Therefore “contributed” jitter cannot be calculated. Instead, Fibre Channel standard FC-PI-4 controls the
receiver output specication of TJ, DJ and DDPWS.
10
Notes:
1. An OMA of 302 µW is approximately equal to an average power of –7 dBm, avg assuming an Extinction Ratio of 9 dB.
2. An OMA of 247 µW is approximately equal to an average power of –8 dBm, avg assuming an Extinction Ratio of 9 dB.
3. An OMA of 196 µW is approximately equal to an average power of –9 dBm, avg assuming an Extinction Ratio of 9 dB.
4. Into 50/125 µm (0.2 NA) multi-mode optical ber.
5. Contributed DJ is measured on an oscilloscope in average mode with 50% threshold and K28.5 pattern. Contributed TJ is the sum of contributed
RJ and contributed DJ. 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. Per FC-PI-4 (Table 13 - MM jitter output, note 1), the actual contributed RJ is allowed to increase above its limit if the actual
contributed DJ decreases below its limits, as long as the component output DJ and TJ remain within their specied FC-PI-4 maximum limits with
the worst case specied component jitter input.
Table 7. Transmitter Optical Characteristics
(TC = -10°C to 85°C, VccT, VccR = 3.3V ±10%)
Parameter Symbol Minimum Typical Maximum Unit Notes
Modulated Optical Output Power (OMA) Tx,OMA 302 µW Note 1
(Peak-to-Peak) 8.5 Gb/s
Modulated Optical Output Power (OMA) Tx,OMA 247 µW Note 2
(Peak-to-Peak) 4.25 Gb/s
Modulated Optical Output Power (OMA) Tx,OMA 196 µW Note 3
(Peak-to-Peak) 2.125 Gb/s
Average Optical Output Power Pout -8.2 0 dBm Note 4
Center Wavelength lC 840 860 nm
Spectral Width – rms s,rms 0.65 nm
Optical Rise/Fall Time (8.5 Gb/s) tr, tf 40 ps 20% - 80%
RIN 12 (OMA) RIN -128 dB/Hz
Transmitter Waveform Distortion Penalty (8.5 Gb/s) TWDP 4.3 dB
Transmitter Uncorrelated Jitter (8.5 Gb/s) UJ 0.03 UI Note 5
3.5 ps
Transmitter Contributed Total Jitter (4.25 Gb/s) TJ 0.25 UI Note 5
59.8 ps
Transmitter Contributed Total Jitter (2.125 Gb/s) TJ 0.25 UI Note 5
119.6 ps
Pout TX_DISABLE Asserted POFF -30 dBm
11
Table 8. Receiver Optical Characteristics
(TC = -10°C to 85°C, VccT, VccR = 3.3 V ±10%)
Parameter Symbol Min. Typ. Max. Unit Notes
Input Optical Power [Overdrive] PIN 0 dBm, avg
Input Optical Modulation Amplitude OMA 76 µW, OMA Notes 1
(Peak-to-Peak) 8.5 Gb/s [Sensitivity]
Input Optical Modulation Amplitude OMA 61 µW, OMA Notes 1, 2
(Peak-to-Peak) 4.25 Gb/s [Sensitivity]
Input Optical Modulation Amplitude OMA 49 µW, OMA Notes 1, 3
(Peak-to-Peak) 2.125 Gb/s [Sensitivity]
Stressed Receiver Sensitivity 148 uW, OMA 50/125um OM3 ber, Note 4
(OMA) 8.5 Gb/s 151 µW, OMA 50/125 µm OM2 ber, Note 4
155 µW, OMA 62.5/125 µm ber, Note 4
Stressed Receiver Sensitivity 126 uW, OMA 50/125um OM3 ber, Note 5
(OMA) 4.25 Gb/s 138 µW, OMA 50/125 µm OM2 ber, Note 5
148 µW, OMA 62.5/125 µm ber, Note 5
Stressed Receiver Sensitivity 83 uW,OMA 50/125um OM3 ber, Note 6
(OMA) 2.125 Gb/s 96 µW, OMA 50/125 µm OM2 ber, Note 6
109 µW, OMA 62.5/125 µm ber, Note 6
Return Loss 12 dB
Loss of Signal – Assert PA -30 dBm, avg Note 7
Loss of Signal - De-Assert PD -13.9 dBm, avg Note 7
Loss of Signal Hysteresis PD - PA 0.5 dB
Notes:
1. Input Optical Modulation Amplitude (commonly known as sensitivity) requires a valid 8B/10B encoded input.
2. An OMA of 61 µW is approximately equal to an average power of –14 dBm, avg with an Extinction Ratio of 9 dB.
3. An OMA of 49 µW is approximately equal to an average power of –15 dBm, avg with an Extinction Ratio of 9 dB.
4. 8.5 Gb/s stressed receiver vertical eye closure penalty (ISI) min. is 3.45 dB for 50 µm ber and 3.52 dB for 62.5 µm ber.
5. 4.25 Gb/s stressed receiver vertical eye closure penalty (ISI) min. is 1.67 dB for 50 µm ber and 2.14 dB for 62.5 µm ber.
6. 2.125 Gb/s stressed receiver vertical eye closure penalty (ISI) min. is 1.26 dB for 50 µm ber and 2.03 dB for 62.5 µm ber.
7. These average power values are specied with an Extinction Ratio of 6 dB. The loss of signal circuitry responds to valid 8B/10B encoded peak to
peak input optical power, not average power.
12
Table 9. Transceiver SOFT DIAGNOSTIC Timing Characteristics
(TC = -10°C to 85°C, VccT, VccR = 3.3 V ±10%)
Parameter Symbol Minimum Maximum Unit Notes
Hardware TX_DISABLE Assert Time t_o 10 µs Note 1
Hardware TX_DISABLE Negate Time t_on 1 ms Note 2
Time to initialize, including reset of TX_FAULT t_init 300 ms Note 3
Hardware TX_FAULT Assert Time t_fault 1 ms Note 4
Hardware TX_DISABLE to Reset t_reset 10 µs Note 5
Hardware RX_LOS Deassert Time t_loss_on 100 µs Note 6
Hardware RX_LOS Assert Time t_loss_o 100 µs Note 7
Software TX_DISABLE Assert Time t_o_soft 100 ms Note 8
Software TX_DISABLE Negate Time t_on_soft 100 ms Note 9
Software Tx_FAULT Assert Time t_fault_soft 100 ms Note 10
Software Rx_LOS Assert Time t_loss_on_soft 100 ms Note 11
Software Rx_LOS Deassert Time t_loss_o_soft 100 ms Note 12
Analog parameter data ready t_data 1000 ms Note 13
Serial bus hardware ready t_serial 300 ms Note 14
Serial bus buer time t_buf 20 µs Note 16
Write Cycle Time t_write 80 ms Note 15
Serial ID Clock Rate f_serial_clock 400 kHz 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 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.
9. 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 nomi-
nal.
10. Time from fault to two-wire interface TX_FAULT (A2h, byte 110, bit 2) asserted.
11. Time for two-wire interface assertion of Rx_LOS (A2h, byte 110, bit 1) from loss of optical signal.
12. Time for two-wire interface de-assertion of Rx_LOS (A2h, byte 110, bit 1) from presence of valid optical signal.
13. From power on to data ready bit asserted (A2h, byte 110, bit 0). Data ready indicates analog monitoring circuitry is functional.
14. Time from power on until module is ready for data transmission over the serial bus (reads or writes over A0h and A2h).
15. Time from stop bit to completion of a 1-8 byte write command. For a one to four byte write the maximum cycle time is 40ms and for a ve to
eight byte write the maximum cycle time is 80ms.
16. Time between STOP and START commands.
17. Module may clock stretch for f_serial_clock greater than 100 kHz.
13
Table 10. Transceiver Digital Diagnostic Monitor (Real Time Sense) Characteristics
(TC = -10°C to 85°C, VccT, VccR = 3.3 V ±10%)
Parameter Symbol Min. Units Notes
Transceiver Internal Temperature TINT ±3.0 °C Temperature is measured internal to the transceiver.
Accuracy Valid from = -10°C to 85°C case temperature.
Transceiver Internal Supply VINT ±0.1 V Supply voltage is measured internal to the transceiver
Voltage Accuracy and can, with less accuracy, be correlated to
voltage at the SFP Vcc pin. Valid over 3.3 V ± 10%.
Transmitter Laser DC Bias Current IINT ±10 % IINT is better than ±10% of the nominal value.
Accuracy
Transmitted Average Optical PT ±3.0 dB Coupled into 50/125 µm multi-mode ber. Valid from
Output Power Accuracy 100 µW to 500 µW, avg.
Received Average Optical Input PR ±3.0 dB Coupled from 50/125 µm multi-mode ber. Valid from
Power Accuracy 49 µW to 500 µW, avg.
Figure 4. Transceiver timing diagrams (module installed except where noted).
TX_FAULT
OCCURANCE OF FAULT
t_fault
TX_DISABLE
TRANSMITTED SIGNAL
TX_FAULT
OCCURANCE OF FAULT
TX_DISABLE
TRANSMITTED SIGNAL
t-fault: TX FAULT ASSERTED, TX SIGNAL NOT RECOVERED t-reset: TX DISABLE ASSERTED THEN NEGATED, TX SIGNAL RECOVERED
t_reset t_init*
* SFP SHALL CLEAR TX_FAULT IN
< t_init IF THE FAILURE IS TRANSIENT
TX_FAULT
OCCURANCE OF FAULT
t_fault
TX_DISABLE
TRANSMITTED SIGNAL
OPTICAL SIGNAL
LOS
t-fault: TX DISABLE ASSERTED THEN NEGATED, TX SIGNAL NOT RECOVERED t-loss-on & t-loss-off
t_loss_on
t_init*
t_reset
* SFP SHALL CLEAR TX_FAULT IN
< t_init IF THE FAILURE IS TRANSIENT
t_loss_off
OCCURANCE
OF LOSS
TX_FAULT
V
CC
T,R > 2.97 V
t_init
TX_DISABLE
TRANSMITTED SIGNAL
t_init
TX_FAULT
V
CC
T,R > 2.97 V
TX_DISABLE
TRANSMITTED SIGNAL
t-init: TX DISABLE NEGATED t-init: TX DISABLE ASSERTED
TX_FAULT
V
CC
T,R > 2.97 V
t_init
TX_DISABLE
TRANSMITTED SIGNAL
t_off
TX_FAULT
TX_DISABLE
TRANSMITTED SIGNAL
t-init: TX DISABLE NEGATED, MODULE HOT PLUGGED t-off & t-on: TX DISABLE ASSERTED THEN NEGATED
INSERTION
t_on
14
Table 12. EEPROM Serial ID Memory Contents – Conventional SFP Memory (Address A0h)
Byte #
Decimal
Data
Hex Notes
Byte #
Decimal
Data
Hex Notes
0 03 SFP physical device 37 00 Hex Byte of Vendor OUI[4]
1 04 SFP function dened by serial ID only 38 17 Hex Byte of Vendor OUI[4]
2 07 LC optical connector 39 6A Hex Byte of Vendor OUI[4]
3 00 40 41 “A” - Vendor Part Number ASCII character
4 00 41 46 “F” - Vendor Part Number ASCII character
5 00 42 42 “B” - Vendor Part Number ASCII character
6 00 43 52 “R” - Vendor Part Number ASCII character
7 20 Intermediate distance (per FC-PI) 44 2D “-” - Vendor Part Number ASCII character
8 40 Shortwave laser without OFC (open ber
control)
45 35 “5” - Vendor Part Number ASCII character
9 0C Multi-mode 50 µm and 62.5 µm optical media 46 37 “7” - Vendor Part Number ASCII character
10 54 200, 400 & 800 Mbytes/sec FC-PI-4 speed[1] 47 44 “D” - Vendor Part Number ASCII character
11 01 Compatible with 8B/10B encoded data 48 39 “9” - Vendor Part Number ASCII character
12 55 8500 MBit/sec nominal bit rate (8.5 Gbit/s) 49 41 “A” - Vendor Part Number ASCII character
13 00 50 4D “M” - Vendor Part Number ASCII character
14 00 51 5A “Z” - Vendor Part Number ASCII character
15 00 52 20 “ ” - Vendor Part Number ASCII character
16 05 50 m of OM2 50/125 µm ber @ 8.5Gbit/sec[2] 53 20 “ ” - Vendor Part Number ASCII character
17 03 25 m of OM1 62.5/125 µm ber @ 8.5Gbit/sec[3] 54 20 “ ” - Vendor Part Number ASCII character
18 00 55 20 “ ” - Vendor Part Number ASCII character
19 0F 150 m of OM3 50/125 µm ber @ 8.5Gbit/sec[9] 56 20 “ ” - Vendor Part Number ASCII character
20 41 “A” - Vendor Name ASCII character 57 20 “ ” - Vendor Part Number ASCII character
21 56 “V” - Vendor Name ASCII character 58 20 “ ” - Vendor Part Number ASCII character
22 41 “A” - Vendor Name ASCII character 59 20 “ ” - Vendor Part Number ASCII character
23 47 “G” - Vendor Name ASCII character 60 03 Hex Byte of Laser Wavelength[5]
24 4F “O” - Vendor Name ASCII character 61 52 Hex Byte of Laser Wavelength[5]
25 20 “ ” - Vendor Name ASCII character 62 00
26 20 “ ” - Vendor Name ASCII character 63 Checksum for Bytes 0-62[6]
27 20 “ ” - Vendor Name ASCII character 64 00 Receiver limiting output. 1 Watt power class.
28 20 “ ” - Vendor Name ASCII character 65 1A Hardware SFP TX_DISABLE, TX_FAULT, &
RX_LOS,
29 20 “ ” - Vendor Name ASCII character 66 00
30 20 “ ” - Vendor Name ASCII character 67 00
31 20 “ ” - Vendor Name ASCII character 68-83 Vendor Serial Number ASCII characters[7]
32 20 “ ” - Vendor Name ASCII character 84-91 Vendor Date Code ASCII characters[8]
33 20 “ ” - Vendor Name ASCII character 92 68 Digital Diagnostics, Internal Cal, Rx Pwr Avg
34 20 “ ” - Vendor Name ASCII character 93 F0 A/W, Soft SFP TX_DISABLE, TX_FAULT, &
RX_LOS,
35 20 “ ” - Vendor Name ASCII character 94 03 SFF-8472 Compliance to revision 10.2
36 00 95 Checksum for Bytes 64-94[6]
96 - 255 00
Notes:
1. FC-PI speed 800 MBytes/sec is a serial bit rate of 8.5 Gbit/sec. 200 MBytes/sec is a serial bit rate of 2.125 GBit/sec. 400 MBytes/sec is a serial bit rate
of 4.25 GBit/sec.
2. Link distance with OM2 50/125 µm cable at 4.25 Gbit/sec is 150 m. Link distance at 2.125 Gbit/sec is 300 m.
3. Link distance with OM1 62.5/125 µm cable at 4.25 Gbit/sec is 70 m. Link distance at 2.125 Gbit/sec is 150 m.
4. The IEEE Organizationally Unique Identier (OUI) assigned to Avago Technologies is 00-17-6A (3 bytes of hex).
5. Laser wavelength is represented in 16 unsigned bits. The hex representation of 850 (nm) is 0352.
6. Addresses 63 and 95 are checksums calculated (per SFF-8472 and SFF-8074) and stored prior to product shipment.
7. Addresses 68-83 specify the AFBR-57D9AMZ ASCII serial number and will vary on a per unit basis.
8. Addresses 84-91 specify the AFBR-57D9AMZ ASCII date code and will vary on a per date code basis.
9. Link distance with OM3 50/125 µm cable at 4.25 Gbit/sec is 380 m. Link distance at 2.125 Gbit/sec is 500 m.
15
Table 13. EEPROM Serial ID Memory Contents – Enhanced Feature Set Memory (Address A2h)
Byte # Byte # Byte #
Decimal Notes Decimal Notes Decimal Notes
0 Temp H Alarm MSB[1] 26 Tx Pwr L Alarm MSB[4] 104 Real Time Rx Pwr MSB[5]
1 Temp H Alarm LSB[1] 27 Tx Pwr L Alarm LSB[4] 105 Real Time Rx Pwr LSB[5]
2 Temp L Alarm MSB[1] 28 Tx Pwr H Warning MSB[4] 106 Reserved
3 Temp L Alarm LSB[1] 29 Tx Pwr H Warning LSB[4] 107 Reserved
4 Temp H Warning MSB[1] 30 Tx Pwr L Warning MSB[4] 108 Reserved
5 Temp H Warning LSB[1] 31 Tx Pwr L Warning LSB[4] 109 Reserved
6 Temp L Warning MSB[1] 32 Rx Pwr H Alarm MSB[5] 110 Status/Control - See
Table 14
7 Temp L Warning LSB[1] 33 Rx Pwr H Alarm LSB[5] 111 Reserved
8 Vcc H Alarm MSB[2] 34 Rx Pwr L Alarm MSB[5] 112 Flag Bits - See Table 15
9 Vcc H Alarm LSB[2] 35 Rx Pwr L Alarm LSB[5] 113 Flag Bits - See Table 15
10 Vcc L Alarm MSB[2] 36 Rx Pwr H Warning MSB[5] 114 Reserved
11 Vcc L Alarm LSB[2] 37 Rx Pwr H Warning LSB[5] 115 Reserved
12 Vcc H Warning MSB[2] 38 Rx Pwr L Warning MSB[5] 116 Flag Bits - See Table 15
13 Vcc H Warning LSB[2] 39 Rx Pwr L Warning LSB[5] 117 Flag Bits - See Table 15
14 Vcc L Warning MSB[2] 40-55 Reserved 118-127 Reserved
15 Vcc L Warning LSB[2] 56-94 External Calibration Constants[6] 128-247 Customer Writeable
16 Tx Bias H Alarm MSB[3] 95 Checksum for Bytes 0-94[7] 248-255 Vendor Specic
17 Tx Bias H Alarm LSB[3] 96 Real Time Temperature MSB[1]
18 Tx Bias L Alarm MSB[3] 97 Real Time Temperature LSB[1]
19 Tx Bias L Alarm LSB[3] 98 Real Time Vcc MSB[2]
20 Tx Bias H Warning MSB[3] 99 Real Time Vcc LS[2]
21 Tx Bias H Warning LSB[3] 100 Real Time Tx Bias MSB[3]
22 Tx Bias L Warning MSB[3] 101 Real Time Tx Bias LSB[3]
23 Tx Bias L Warning LSB[3] 102 Real Time Tx Power MSB[4]
24 Tx Pwr H Alarm MSB[4] 103 Real Time Tx Power LSB[4]
25 Tx Pwr H Alarm LSB[4]
Notes:
1. Temperature (Temp) is decoded as a 16 bit signed twos compliment integer in increments of 1/256°C.
2. Supply Voltage (Vcc) is decoded as a 16 bit unsigned integer in increments of 100 µV.
3. Laser bias current (Tx Bias) is decoded as a 16 bit unsigned integer in increments of 2 µA.
4. Transmitted average optical power (Tx Pwr) is decoded as a 16 bit unsigned integer in increments of 0.1 µW.
5. Received average optical power (Rx Pwr) is decoded as a 16 bit unsigned integer in increments of 0.1 µW.
6. Bytes 56-94 are not intended for use with AFBR-57D9AMZ, 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.
16
Table 14. EEPROM Serial ID Memory Contents – Soft Commands (Address A2h, Byte 110)
Status/
Bit # Control Name Description Notes
7 TX_ DISABLE State Digital state of SFP TX_ DISABLE Input Pin (1 = TX_DISABLE asserted) Note 1
6 Soft TX_ DISABLE Read/write bit for changing digital state of TX_DISABLE function Note 1, 2
5 Reserved Unused
4 Reserved Unused
3 Reserved Unused
2 TX_FAULT State Digital state of the SFP TX_FAULT Output Pin (1 = TX_FAULT asserted) Note 1
1 RX_LOS State Digital state of the SFP RX_LOS Output Pin (1 = RX_LOS asserted) Note 1
0 Data Ready (Bar) Indicates transceiver is powered and real time sense data is ready. (0 = Ready) Note 3
Notes:
1. The response time for soft commands of the AFBR-57D9AMZ is 100 msec as specied 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 Bit Flag Bit Name Description
112 7 Temp High Alarm Set when transceiver internal temperature exceeds high alarm threshold
6 Temp Low Alarm Set when transceiver internal temperature exceeds low alarm threshold
5 Vcc High Alarm Set when transceiver internal supply voltage exceeds high alarm threshold
4 Vcc Low Alarm Set when transceiver internal supply voltage exceeds low alarm threshold
3 Tx Bias High Alarm Set when transceiver laser bias current exceeds high alarm threshold
2 Tx Bias Low Alarm Set when transceiver laser bias current exceeds low alarm threshold
1 Tx Power High Alarm Set when transmitted average optical power exceeds high alarm threshold
0 Tx Power Low Alarm Set when transmitted average optical power exceeds low alarm threshold
113 7 Rx Power High Alarm Set when received average optical power exceeds high alarm threshold
6 Rx Power Low Alarm Set when received average optical power exceeds low alarm threshold
0-5 Reserved
116 7 Temp High Warning Set when transceiver internal temperature exceeds high warning threshold
6 Temp Low Warning Set when transceiver internal temperature exceeds low warning threshold
5 Vcc High Warning Set when transceiver internal supply voltage exceeds high warning threshold
4 Vcc Low Warning Set when transceiver internal supply voltage exceeds low warning threshold
3 Tx Bias High Warning Set when transceiver laser bias current exceeds high warning threshold
2 Tx Bias Low Warning Set when transceiver laser bias current exceeds low warning threshold
1 Tx Power High Warning Set when transmitted average optical power exceeds high warning threshold
0 Tx Power Low Warning Set when transmitted average optical power exceeds low warning threshold
117 7 Rx Power High Warning Set when received average optical power exceeds high warning threshold
6 Rx Power Low Warning Set when received average optical power exceeds low warning threshold
0-5 Reserved
Customer Manufacturing Processes
This module is pluggable and is not designed for aqueous wash, IR reow, or wave soldering processes.
For product information and a complete list of distributors, please go to our website: www.avagotech.com
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.
Data subject to change. Copyright © 2005-2013 Avago Technologies. All rights reserved.
AV02-3466EN - January 24, 2013
Figure 5. Module drawing
Figure 6. Module Label
TX
6.25
RX
0.64 UNCOMPRESSED
0.69 UNCOMPRESSED
TCASE REFERENCE POINT
15.14 UNCOMPRESSED
BOTTOM LABEL RECESS
TOP LABEL RECESS
47.5
13.9
25.2
8.9
8.55
±0.1
13.6
13.4
±0.1
12
13
12.2
30.8
AFBR-57D9AMZ
ADYYWWAXXXX
