Agilent AFBR-57L5APZ
Digital Diagnostic SFP, 850 nm,
1.0625 and 1.25 GBd Ethernet,
RoHS Compliant Optical Transceiver
Data Sheet

Features,

continued

ˇ Link lengths at 1.0625 GBd:

500 m with 50

m MMF,

300 m with 62.5

m MMF

ˇ Link lengths at 1.25 GBd:

2 to 550 m with 50

m MMF,

2 to 275 m with 62.5

m MMF

ˇ LC Duplex optical connector

interface conforming to ANSI
TIA/EIA604-10 (FOCIS 10A)

ˇ 850 nm Vertical Cavity Surface

Emitting Laser (VCSEL) source
technology

ˇ IEC 60825-1 Class 1/CDRH Class 1

laser eye safe

Applications

ˇ Fibre channel systems

Director class switches

Fabric switches

HBA cards

ˇ Disk and tape drive arrays

Related Products

ˇ AFBR-59R5LZ: 850 nm +3.3 V LC

SFF 2x7 for 4.25/2.125/1.0625
GBd Fibre Channel

ˇ AFBR-57R5APZ: 850 nm +3.3 V LC

SFP for 4.25/2.125/1.0625 GBd
Fibre Channel

850 nm, SFP (Small Form Pluggable), RoHS Compliant,
Low Voltage (3.3 V) Digital Diagnostic Optical Transceiver

Features

ˇ Fully RoHS Compliant

ˇ Diagnostic features per SFF-8472

"Diagnostic Monitoring Interface
for Optical Transceivers"

ˇ Real time monitoring of:

Transmitted optical power
Received optical power
Laser bias current
Temperature
Supply voltage

ˇ Wide temperature and supply

voltage operation (-10

C to 85

(3.3 V

10%)

ˇ Transceiver specifications per SFP

(SFF-8074i) Multi-Source Agree-
ment and SFF-8472 (revision 9.3)

1.0625 GBd Fibre Channel

operation for FC-PI 100-M5-SN-I
and 100-M6-SN-I

1.25 GBd operation for IEEE 802.3

Gigabit Ethernet 1000Base-SX

Description

Agilent's AFBR-57L5APZ optical
transceiver supports high-speed
serial links over multimode
optical fiber at signaling rates up
to 1.0625 Gb/s. Compliant with
Small Form Pluggable (SFP)
Multi Source Agreement (MSA)
mechanical and electrical
specifications for LC Duplex
transceivers, ANSI Fibre
Channel FC-PI, FC-PI-2 and
compliant with IEEE 802.3 for
gigabit applications. The part is
electrically interoperable with
SFP conformant devices.

As an enhancement to the
conventional SFP interface
defined in SFF-8074i, the AFBR-
57L5APZ is compliant to SFF-
8472 (digital diagnostic interface
for optical transceivers). Using
the 2-wire serial interface
defined in the SFF-8472 MSA,
the AFBR-57L5APZ 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 (TX_DISABLE),
monitor for Transmitter Faults
(TX_FAULT), and monitor for
Receiver Loss of Signal (RX_LOS).

Installation
The AFBR-57L5APZ can be
installed in any SFF-8074i
compliant Small Form Pluggable
(SFP) port regardless of host
equipment operating status. The
AFBR-57L5APZ 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 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
SFF-8074i. New digital diag-
nostic information, bytes 0-255
at memory address 0xA2, is
compliant to SFF-8472. The new
diagnostic information provides
the opportunity for Predictive
Failure Identification, Com-
pliance Prediction, Fault
Isolation and Component
Monitoring.

Predictive Failure Identification
The AFBR-57L5APZ 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 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-57L5APZ
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 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. AFBR-57L5APZ
real-time 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.

Component Monitoring
Component evaluation is a more
casual use of the AFBR-57L5APZ
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.

Description,

continued

Figure 1. Transceiver functional diagram.

Transmitter Section

The transmitter section includes
consists of 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 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).

Transmit Disable (Tx_Disable)
The AFBR-57L5APZ 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 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-57L5APZ 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.

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

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).

Functional Data I/O
The AFBR-57L5APZ 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 AFBR-57L5APZ 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-57L5APZ 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-
57L5APZ. 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-
57L5APZ. All mechanical

adjustments are made at the
factory prior to shipment.
Tampering with, modifying,
misusing or improperly handling
the AFBR-57L5APZ 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 AFBR-57L5APZ
to a light source not compliant
with ANSI FC-PI or IEEE 802.3
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.

Ordering Information

Please contact your local field
sales engineer or one of Agilent
Technologies franchised
distributors for ordering
information. For technical
information, please visit Agilent
Technologies' WEB page at
www.agilent.com or contact
Agilent Technologies Semicon-
ductor Products Customer
Response Center at 1-800-235-
0312. For information related to
SFF Committee documentation
visit www.sffcommittee.org.

Regulatory Compliance
The AFBR-57L5APZ 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.

Electrostatic Discharge (ESD)
The AFBR-57L5APZ 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 pre-
cautions. These include use of
grounded wrist straps, work-
benches 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.

Electromagnetic Interference (EMI)
Equipment incorporating gigabit
transceivers is typically subject to

Table 1. Regulatory Compliance

Feature

Test Method

Performance

Electrostatic Discharge (ESD)

MIL-STD-883C

Class 1 (> 2000 Volts)

to the Electrical Pins

Method 3015.4

Electrostatic Discharge (ESD)

Variation of IEC 61000-4-2

Typically, no damage occurs with 25 kV when

to the Duplex LC Receptacle

the duplex LC connector receptacle is
contacted by a Human Body Model probe.

GR1089

10 contacts of 8 kV on the electrical faceplate
with device inserted into a panel.

Electrostatic Discharge (ESD)

Variation of IEC 801-2

Air discharge of 15 kV (min.) contact to

to the Optical Connector

connector without damage.

Electromagnetic Interference

FCC Class B

System margins are dependent on customer

(EMI)

CENELEC EN55022 Class B

board and chassis design.

(CISPR 22A)
VCCI Class 1

Immunity

Variation of IEC 61000-4-3

Typically shows no measurable effect from a
10 V/m field swept from 10 MHz to 1 GHz.

Laser Eye Safety and

US FDA CDRH AEL Class 1

CDRH certification # TBD

Equipment Type Testing

US21 CFR, Subchapter J per

TUV file # TBD

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

Component Recognition

Underwriters Laboratories and

UL File # TBD

Canadian Standards Association
Joint Component Recognition
for Information Technology
Equipment including Electrical
Business Equipment

RoHS Compliance

Less than 1000 ppm of cadmium, lead, mercury,
hexavalent chromium, polybrominated biphenyls,
and polybrominated biphenyl ethers.

BAUART

GEPRUFT

TYPE

APPROVED

TUV

Rheinland

Product Safety

regulation by the FCC in the United
States, CENELEC EN55022 (CISPR
22) in Europe and VCCI in Japan.
The AFBR-57L5APZ's compliance to
these standards is detailed in Table
1. The metal housing and shielded
design of the AFBR-57L5APZ
minimizes the EMI challenge facing
the equipment designer.

EMI Immunity (Susceptibility)
Due to its shielded design, the EMI
immunity of the AFBR-57L5APZ
exceeds typical industry standards.

Flammability
The AFBR-57L5APZ optical
transceiver is made of metal and
high strength, heat resistant,
chemical resistant and UL 94V-0
flame retardant plastic.

Part Number AFBR-57L5APZ