AFCT-5971LZ [AVAGO]
Single Mode Laser Small Form Factor Fast Ethernet Transceivers; 单模激光器小型化的快速以太网收发器
| 型号： | AFCT-5971LZ |
| 厂家： | 
AVAGO TECHNOLOGIES LIMITED |
| 描述： | Single Mode Laser Small Form Factor Fast Ethernet Transceivers |
| 文件： | 总15页 (文件大小：706K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AFCT-5971LZ/ALZ
Single Mode Laser Small Form Factor
Fast Ethernet Transceivers
Data Sheet
Description
Features
The AFCT-5971LZ/ALZ are high performance, cost ef-
fective modules for serial optical data communications
applications specified for a signal rate of 125 Mbd. They
are designed for fast ethernet applications and are also
compatible with the EFM baseline 100-BASE-LX10 stan-
dard over dual single mode fiber.
• Multisourced 2 x 5 package style with LC receptacle
• Single +3.3 V power supply
• Temperature range:
AFCT-5971LZ:
0 °C to +70 °C
AFCT-5971ALZ: -40°C to +85°C
• Wave solder and aqueous wash process compatible
• Manufactured in an ISO9002 certified facility
• Fully Class 1 CDRH/IEC 825 compliant
• IEEE 802.3ah Standard Compliant
• RoHS Compliant
• LVPECL compatible signal detect output
• Designed for EFM (Ethernet in the First Mile) baseline
100-BASE-LX10 performance over dual single mode
fiber
All modules are designed for single mode fiber and
operate at a nominal wavelength of 1300 nm. They in-
corporate high performance, reliable, long wavelength
optical devices and proven circuit technology to give
long life and consistent service.
The transmitter section of the AFCT-5971LZ/ALZ incor-
porates a 1300 nm Fabry Perot (FP) laser. The transmit-
ter has full IEC 825 and CDRH Class 1 eye safety.
The receiver section uses an MOVPE grown planar PIN
photodetector for low dark current and excellent re-
sponsivity.
Applications
• Ethernet in the First Mile
• Fast Ethernet
A pseudo-ECL compatible logic interface simplifies in-
terface to external circuitry.
These transceivers are supplied in the new industry
standard 2 x 5 DIP style package with the LC fiber con-
nector interface and is footprint compatible with SFF
Multi Source Agreement (MSA).
Functional Description
Receiver Section
Design
These components will reduce the sensitivity of the re-
ceiver as the signal bit rate is increased above 155 Mb/s.
The receiver section for the AFCT-5971LZ/ALZ con-
tains an InGaAs/InP photo detector and a preamplifier
mounted in an optical subassembly. This optical subas-
sembly is coupled to a postamp/decision circuit on a
circuit board. The design of the optical assembly is such
that it provides better than 14 dB Optical Return Loss
(ORL).
Noise Immunity
The receiver includes internal circuit components to
filter power supply noise. However under some condi-
tions of EMI and power supply noise, external power
supply filtering may be necessary (see Application Sec-
tion).
The postamplifier is ac coupled to the preamplifier as
illustrated in Figure 1. The coupling capacitors are large
enough to pass the EFM test pattern at 125 MBd with-
out significant distortion or performance penalty.
The Signal Detect Circuit
The signal detect circuit works by sensing the level of
the received signal and comparing this level to a refer-
ence. The SD output is low voltage PECL.
Figure 1 also shows a filter function which limits the
bandwidth of the preamp output signal. The filter is de-
signed to bandlimit the preamp output noise and thus
improve the receiver sensitivity.
DATA OUT
FILTER
TRANS-
LVPECL
OUTPUT
BUFFER
IMPEDANCE
PRE-
AMPLIFIER
AMPLIFIER
DATA OUT
GND
LVPECL
OUTPUT
BUFFER
SIGNAL
DETECT
CIRCUIT
SD
Figure 1. Receiver Block Diagram
Functional Description
Transmitter Section
Design
FP
LASER
PHOTODIODE
(rear facet monitor)
A schematic diagram for the transmitter is shown in Fig-
ure 2. The AFCT-5971LZ/ALZ incorporates an FP laser as
its optical source. All part numbers have been designed
to be compliant with IEC 825 eye safety requirements
under any single fault condition and CDRH under nor-
mal operating conditions. The optical output is con-
trolled by a custom IC that detects the laser output via
the monitor photodiode. This IC provides both dc and
ac current drive to the laser to ensure correct modula-
tion, eye diagram and extinction ratio over temperature,
supply voltage and operating life.
DATA
DATA
LASER
MODULATOR
LVPECL
INPUT
LASER BIAS
DRIVER
LASER BIAS
CONTROL
Figure 2. Simplified Transmitter Schematic
2
Package
The overall package concept for these devices consists
of the following basic elements; two optical subas-
semblies, a electrical subassembly and the housing as
illustrated in the block diagram in Figure3.
The optical subassemblies are attached to the electrical
subassembly. These two units are then fitted within the
outer housing of the transceiver. The housing is then
encased with a metal EMI protective shield.
The package outline drawing and pin out are shown in
Figures 4 and 5. The details of this package outline and
pin out are compliant with the multisource definition of
the 2 x 5 DIP. The low profile of the Avago Technologies
transceiver design complies with the maximum height
allowed for the LC connector over the entire length of
the package.
The electrical subassembly carries the signal pins that
exit from the bottom of the transceiver. The solder
posts are designed to provide the mechanical strength
required to withstand the loads imposed on the trans-
ceiver by mating with the LC connectored fiber cables.
Although they are not connected electrically to the
transceiver, it is recommended to connect them to
chassis ground.
The electrical subassembly consists of high volume
multilayer printed circuit board on which the IC and
various surface-mounted passive circuit elements are
attached.
RX SUPPLY
NOTE
DATA OUT
PIN PHOTODIODE
PREAMPLIFIER
SUBASSEMBLY
QUANTIZER IC
DATA OUT
RX GROUND
SIGNAL
DETECT
LC
TX GROUND
RECEPTACLE
DATA IN
LASER BIAS
DATA IN
MONITORING
LASER
OPTICAL
SUBASSEMBLY
Tx DISABLE
LASER DRIVER
AND CONTROL
CIRCUIT
LASER DIODE
MODULATOR
TX SUPPLY
CASE
NOTE: NOSE CLIP PROVIDES CONNECTION TO CHASSIS GROUND FOR BOTH EMI AND THERMAL DISSIPATION.
Figure 3. Block Diagram
3
TOP VIEW
SIDE VIEW
BACK VIEW
FRONT VIEW
G MODULE - NO EMI SHIELD
SIDE VIEW
BOTTOM VIEW
DIMENSIONS IN MILLIMETERS (INCHES)
DIMENSIONS SHOWN ARE NOMINAL. ALL DIMENSIONS MEET THE MAXIMUM PACKAGE OUTLINE DRAWING IN THE SFF MSA.
Figure 4. AFCT-5971LZ/ALZ Package Outline Drawing
4
Label Instructions:
Product Label Format
Barcode Label Format
a) Product Label:
•
•
CHINA is the Country of Manufacturing.
YYWW is Year and Workweek.
•
is TUV Symbol.
b) Barcode Label:
• ACDDEEFXXXX
-
-
-
-
AC is AFCT product prefix
DDEE is Year and Workweek of barcode label
F is SFF product identifier
XXXX is 4 alphanumeric no in running sequence.
• Marking is done by Labeling on the module. Label Location Refer to Special Assembly Notes.
Special Assembly Notes:
a) The label is attached on top of the metal housing.
b) External nose shield is included.
Top View & Label Location
Bottom View & Label Location
5
Connection Diagram
RX
TX
Mounting Studs/
Solder Posts
Top
View
o
o
o
o
o
o
RECEIVER SIGNAL GROUND
RECEIVER POWER SUPPLY
SIGNAL DETECT
RECEIVER DATA OUT BAR
RECEIVER DATA OUT
1
2
3
4
5
10
TRANSMITTER DATA IN BAR
TRANSMITTER DATA IN
TRANSMITTER DISABLE
TRANSMITTER SIGNAL GROUND
TRANSMITTER POWER SUPPLY
o
o
o
o
9
8
7
6
Figure 5. Pin Out Diagram (Top View)
Pin Descriptions:
Pin 6 Transmitter Power Supply
VCC TX:
Provide +3.3 V dc via the recommended transmitter
power supply filter circuit. Locate the power supply fil-
ter circuit as close as possible to the VCC TX pin.
Pin 1 Receiver Signal Ground VEE RX:
Directly connect this pin to the receiver ground plane.
Pin 2 Receiver Power Supply VCC RX:
Provide +3.3 V dc via the recommended receiver power
supply filter circuit. Locate the power supply filter cir-
cuit as close as possible to the VCC RX pin. Note: the filter
circuit should not cause VCC to drop below minimum
specification.
Pin 7 Transmitter Signal Ground
VEE TX:
Directly connect these pins to the transmitter signal
ground plane.
Pin 3 Signal Detect SD:
Normal optical input levels to the receiver result in a
logic “1”output.
Pin 8 Transmitter Disable TDIS:
Optional feature, connect this pin to +3.3 V TTL logic
high “1” to disable module. To enable module connect to
TTL logic low “0”.
Low optical input levels to the receiver result in a logic
“0”output.
Pin 9 Transmitter Data In TD+:
No internal terminations are provided. See recommend-
ed circuit schematic.
This Signal Detect output can be used to drive a LVPECL
input on an upstream circuit, such as Signal Detect in-
put or Loss of Signal-bar.
Pin 4 Receiver Data Out Bar RD-:
Pin 10 Transmitter Data In Bar TD-:
No internal terminations are provided. See recommend-
ed circuit schematic.
No internal terminations are provided. See recommend-
ed circuit schematic.
Pin 5 Receiver Data Out RD+:
Mounting Studs/Solder Posts
No internal terminations are provided. See recommend-
ed circuit schematic.
The two mounting studs are provided for transceiver
mechanical attachment to the circuit board. It is rec-
ommended that the holes in the circuit board be con-
nected to chassis ground.
ꢀ
Application Information
Electrical and Mechanical Interface
Recommended Circuit
Figures ꢀa and ꢀb show recommended dc and ac
coupled circuits for deploying the Avago Technologies
transceivers in +3.3 V systems.
The Applications Engineering Group at Avago Tech-
nologies is available to assist you with technical under-
standing and design trade-offs associated with these
transceivers. You can contact them through your Avago
sales representative.
The following information is provided to answer some
of the most common questions about the use of the
parts.
Data Line Interconnections
Avago Technologies’ AFCT-5971LZ/ALZ fiber-optic
transceivers are designed to couple to +3.3 V PECL sig-
nals. The transmitter driver circuit regulates the output
optical power. The regulated light output will maintain
a constant output optical power provided the data pat-
tern is reasonably balanced in duty cycle. If the data
duty cycle has long, continuous state times (low or high
data duty cycle), then the output optical power will
gradually change its average output optical power level
to its preset value.
Optical Power Budget and
Link Penalties
The worst-case Optical Power Budget (OPB) in dB for a
fiber-optic link is determined by the difference between
the minimum transmitter output optical power (dBm
avg) and the lowest receiver sensitivity (dBm avg). This
OPB provides the necessary optical signal range to es-
tablish a working fiber-optic link. The OPB is allocated
for the fiber-optic cable length and the corresponding
link penalties. For proper link performance, all penalties
that affect the link performance must be accounted for
within the link optical power budget.
PHY DEVICE
TERMINATE AT
TRANSCEIVER INPUTS
Z = 50 Ω
VCC (+3.3 V)
TDIS (LVTTL)
130 Ω
100 Ω
TD-
Z = 50 Ω
LVPECL
130 Ω
TD+
10
9
8
7
6
VCC (+3.3 V)
1 µH
TX
C5 *
10 µF
10 µF
C2
C3
VCC (+3.3 V)
RX
1 µH
RD+
RD-
C4 *
10 µF
C1
1
2
3
4
5
Z = 50 Ω
Z = 50 Ω
100 Ω
VCC (+3.3 V)
LVPECL
130 Ω
130 Ω
130 Ω
Z = 50 Ω
SD
82 Ω
Note: C1 = C2 = C3 = 10 nF or 100 nF
* C4 AND C5 ARE OPTIONAL BYPASS CAPACITORS FOR ADDITIONAL
LOW FREQUENCY NOISE FILTERING.
TERMINATE AT
DEVICE INPUTS
Figure 6a. Recommended dc Coupled Interface Circuit
7
VCC (+3.3 V)
100 nF
100 nF
82 W
Z = 50 W
Z = 50 W
VCC (+3.3 V)
TDIS (LVTTL)
130 W
130 W
82 W
TD-
100 nF
NOTE A
130 W
130 W
TD+
10
9
8
7
6
VCC (+3.3 V)
VCC (+3.3 V)
1 µH
C5 *
TX
10 µF
C2
C3
VCC (+3.3 V)
10 µF
100 nF
82 W
82 W
RX
1 µH
RD+
C4 *
10 µF
C1
1
2
3
4
5
Z = 50 W
Z = 50 W
130 W
NOTE B
100 nF
RD-
VCC (+3.3 V)
100 nF
130
W
130 W
130 W
100 nF
130 W
82 W
Z = 50 W
SD
LVPECL
Note: C1 = C2 = C3 = 10 nF or 100 nF
Note A: CIRCUIT ASSUMES OPEN EMITTER OUTPUT
Note B: WHEN INTERNAL BIAS IS PROVIDED REPLACE SPLIT RESISTORS WITH 100 W TERMINATION
* C4 AND C5 ARE OPTIONAL BYPASS CAPACITORS FOR ADDITIONAL LOW FREQUENCY NOISE FILTERING.
Figure 6b. Recommended ac Coupled Interface Circuit
ous ground plane be provided in the circuit board di-
rectly under the transceiver to provide a low inductance
ground for signal return current. This recommendation
is in keeping with good high frequency board layout
practices.
The AFCT-5971LZ/ALZ have a transmit disable function
which is a single-ended +3.3 V TTL input which is dc-
coupled to pin 8.
As for the receiver section, it is internally ac-coupled
between the preamplifier and the postamplifier stages.
The actual Data and Data-bar outputs of the postampli-
fier are dc-coupled to their respective output pins (pins
4, 5). The two data outputs of the receiver should be
terminated with identical load circuits.
Package footprint and front panel considerations
The Avago Technologies transceivers comply with the
circuit board “Common Transceiver Footprint” hole
pattern defined in the current multisource agreement
which defined the 2 x 5 package style. This drawing
is reproduced in Figure 7 with the addition of ANSI
Y14.5M compliant dimensioning to be used as a guide
in the mechanical layout of your circuit board. Figure 8
shows the front panel dimensions associated with such
a layout.
Signal Detect is a single-ended, +3.3 V PECL compatible
output signal that is dc-coupled to pin 3 of the module.
Signal Detect should not be ac-coupled externally to
the follow-on circuits because of its infrequent state
changes.
Power Supply Filtering and Ground Planes
Eye Safety Circuit
It is important to exercise care in circuit board layout
to achieve optimum performance from these transceiv-
ers. Figures ꢀa and ꢀb show the power supply circuit
which complies with the small form factor multisource
agreement. It is further recommended that a continu-
For an optical transmitter device to be eye-safe in the
event of a single fault failure, the transmit-ter must ei-
ther maintain eye-safe operation or be disabled.
8
17.8
(0.700)
2 x Ø 1.4 0.1
(0.055 0.004)
*4
3.56
(0.14)
2 x Ø 2.29 MAX. 2 x Ø 1.4 0.1
NOTES:
7.11
(0.28)
(0.09)
(0.055 0.004)
1. THIS
FIGURE
DESCRIBES
MSA
*5
RECOMMENDED CIRCUIT BOARD LAYOUT
FOR THE SFF TRANSCEIVER.
2. THEHATCHEDAREASAREKEEP-OUTAREAS
RESERVED FOR HOUSING STANDOFFS. NO
METAL TRACES OR GROUND CONNECTION
IN KEEP-OUT AREAS.
4 x Ø 1.4 0.1
(0.055 0.004)
10.16
13.34
(0.4)
(0.525)
3. 2 x 5 TRANSCEIVER MODULE REQUIRES 16
PCB HOLES (10 I/O PINS, 2 SOLDER POSTS
AND 4 OPTIONAL PACKAGE GROUNDING
TABS). PACKAGE GROUNDING TABS
SHOULD BE CONNECTED TO SIGNAL
GROUND.
7.59
(0.299)
9.59
(0.378)
2
(0.079)
*4. THE MOUNTING STUDS SHOULD BE
SOLDERED TO CHASSIS GROUND FOR
MECHANICAL INTEGRITY AND TO ENSURE
FOOTPRINT COMPATIBILITY WITH OTHER
SFFTRANSCEIVERS.
4 x 1.78
(0.07)
2
3
3
2 x Ø 2.29
(0.09)
(0.079)
(0.118)
(0.118)
4.57
(0.18)
10 x Ø 0.81 0.1
(0.032 0.004)
6
*5. HOLES FOR OPTIONAL HOUSING LEADS
MUST BE TIED TO SIGNAL GROUND.
3.08
(0.236)
(0.121)
DIMENSIONSINMILLIMETERS(INCHES)
Figure 7. Recommended Board Layout Hole Pattern
magnetic Interference (EMI) enables the designer to pass
a governmental agency’s EMI regulatory standard and
more importantly, it reduces the possibility of interfer-
ence to neighboring equipment. Avago Technologies
has designed the AFCT-5971LZ/ALZ to provide excel-
lent EMI performance. The EMI performance of a chassis
is dependent on physical design and features which
help improve EMI suppression. Avago Technologies en-
courages using standard RF suppression practices and
avoiding poorly EMI-sealed enclosures.
The AFCT-5971LZ/ALZ is intrinsically eye safe and does
not require shut down circuitry.
Signal Detect
The Signal Detect circuit provides a deasserted output
signal when the optical link is broken (or when the re-
mote transmitter is OFF). The Signal Detect threshold is
set to transition from a high to low state between the
minimum receiver input optical power and -45 dBm
avg. input optical power indicating a definite optical
fault (e.g. unplugged connector for the receiver or
transmitter, broken fiber, or failed far-end transmitter or
data source). The Signal Detect does not detect receiver
data error or error-rate. Data errors can be determined
by signal processing offered by upstream PHY ICs.
Avago Technologies’ LC transceivers (AFCT-5971LZ/ALZ)
have nose shields which provide a convenient chassis
connection to the nose of the transceiver. This nose
shield improves system EMI performance by effec-
tively closing off the LC aperture. The recommended
transceiver position, PCB layout and panel opening for
these devices are the same, making them mechanically
drop-in compatible. Figure 8 shows the recommended
positioning of the transceivers with respect to the PCB
and faceplate.
Electromagnetic Interference (EMI)
One of a circuit board designer’s foremost concerns is
the control of electromagnetic emissions from electron-
ic equipment. Success in controlling generated Electro-
9
15.24
(0.6)
10.16 0.1
(0.4 0.004)
TOP OF PCB
B
B
DETAIL A
1
(0.039)
15.24
(0.6)
A
SOLDER POSTS
14.22 0.1
(0.56 0.004)
15.75 MAX. 15.0 MIN.
(0.62 MAX. 0.59 MIN.)
SECTION B - B
DIMENSIONS IN MILLIMETERS (INCHES)
1. FIGURE DESCRIBES THE RECOMMENDED FRONT PANEL OPENING FOR A LC OR SG SFF TRANSCEIVER.
2. SFF TRANSCEIVER PLACED AT 15.24 mm (0.6) MIN. SPACING.
Figure 8. Recommended Panel Mounting
Recommended Solder and Wash Process
Recommended Cleaning/Degreasing Chemicals
The AFCT-5971LZ/ALZ are compatible with industry-
standard wave solder processes.
Alcohols: methyl, isopropyl, isobutyl.
Aliphatics: hexane, heptane
Other: naphtha.
Process plug
Do not use partially halogenated hydrocarbons such as
1,1.1 trichloroethane, ketones such as MEK, acetone,
chloroform, ethyl acetate, methylene dichloride, phenol,
methylene chloride, or N-methylpyrolldone. Also, Avago
Technologies does not recommend the use of cleaners
that use halogenated hydrocarbons because of their
potential environmental harm.
This transceiver is supplied with a process plug for
protection of the optical port within the LC connector
receptacle. This process plug prevents contamination
during wave solder and aqueous rinse as well as during
handling, shipping and storage. It is made of a high-
temperature, molded sealing material that can with-
stand +85°C and a rinse pressure of 110 lbs per square
inch.
LC SFF Cleaning Recommendations
In the event of contamination of the optical ports, the
recommended cleaning process is the use of forced
nitrogen. If contamination is thought to have remained,
the optical ports can be cleaned using a NTT interna-
tional Cletop stick type (diam. 1.25 mm) and HFE7100
cleaning fluid.
The process plug should only be used once. After
removing it from the transceiver, it must not be used
again as a process plug; however, if it has not been
contaminated it can be reused as a dust cover.
Recommended Solder fluxes
Solder fluxes used with the AFCT-5971LZ/ALZ should
be water-soluble, organic fluxes. Recommended solder
fluxes include Lonco 3355-11 from London Chemical
West, Inc. of Burbank, CA, and 100 Flux from Alpha-
Metals of Jersey City, NJ.
Regulatory Compliance
The Regulatory Compliance for transceiver performance
is shown in Table 1. The overall equipment design will
determine the certification level. The transceiver perfor-
mance is offered as a figure of merit to assist the design-
er in considering their use in equipment designs.
10
Table 1: Regulatory Compliance - Targeted Specification
Feature
Electrostatic Discharge (ESD) MIL-STD-883
to the Electrical Pins Method 3015
Test Method
Performance
Class 1 (>500 V).
Electrostatic Discharge (ESD) Variation of IEC ꢀ1000-4-2
to the LC Receptacle
Tested to 8 kV contact discharge.
Electromagnetic Interference FCC Class B
(EMI)
Margins are dependent on customer board and chassis
designs.
Immunity
Variation of IEC ꢀ1000-4-3
Typically show no measurable effect from a
10 V/m field swept from 27 to 1000 MHz applied to the
transceiver without a chassis enclosure.
Laser Eye Safety
FDA CDRH 21-CFR 1040
Accession Number: 9521220-133
and Equipment Type Testing Class 1
IEC ꢀ0825-1
Amendment 2 2001-01
License Number: 933/21203530/05
UL File Number: E173874
Component
Recognition
Underwriters Laboratories and
Canadian Standards Association Joint
Component Recognition for Informa-
tion Technology Equipment Includ-
ing Electrical Business Equipment.
They are eye safe when used within the data sheet limits
per CDRH. They are also eye safe under normal operat-
ing conditions and under all reasonably foreseeable
single fault conditions per ENꢀ0825-1. Avago Technolo-
gies has tested the transceiver design for compliance
with the requirements listed below under normal
operating conditions and under single fault conditions
where applicable. TUV Rheinland has granted certifica-
tion to these transceivers for laser eye safety and use in
EN ꢀ0825-2 applications. Their performance enables the
transceivers to be used without concern for eye safety
up to 3.5 V transmitter VCC.
Electrostatic Discharge (ESD)
There are two design cases in which immunity to ESD
damage is important.
The first case is during handling of the transceiver prior
to mounting it on the circuit board. It is important to use
normal ESD handling precautions for ESD sensitive de-
vices. These precautions include using grounded wrist
straps, work benches, and floor mats in ESD controlled
areas.
The second case to consider is static discharges to the
exterior of the equipment chassis containing the trans-
ceiver parts. To the extent that the LC connector recep-
tacle is exposed to the outside of the equipment chassis
it may be subject to whatever system-level ESD test cri-
teria that the equipment is intended to meet.
CAUTION:
There are no user serviceable parts nor any mainte-
nance required for the AFCT-5971LZ/ALZ. All adjust-
ments are made at the factory before shipment to our
customers. Tampering with or modifying the perform-
ance of the parts will result in voided product warranty.
It may also result in improper operation of the circuitry,
and possible overstress of the laser source. Device deg-
radation or product failure may result.
Electromagnetic Interference (EMI)
Most equipment designs utilizing these high-speed
transceivers from Avago Technologies will be required
to meet FCC regulations in the United States, CENELEC
EN55022 (CISPR 22) in Europe and VCCI in Japan. Refer
to EMI section (page 9) for more details.
Connection of the devices to a non-approved optical
source, operating above the recommended absolute
maximum conditions or operating the AFCT-5971LZ/
ALZ in a manner inconsistent with its design and func-
tion may result in hazardous radiation exposure and
may be considered an act of modifying or manufac-
turing a laser product. The person(s) performing such
an act is required by law to recertify and reidentify
the laser product under the provisions of U.S. 21 CFR
(Subchapter J).
Immunity
Transceivers will be subject to radio-frequency elec-
tromagnetic fields following the IEC ꢀ1000-4-3 test
method.
Eye Safety
These laser-based transceivers are classified as AEL Class
I (U.S. 21 CFR(J) and AEL Class 1 per EN ꢀ0825-1 (+A11).
11
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause catastrophic damage to the device. Limits apply to
each parameter in isolation, all other parameters having values within the recommended operating conditions. It
should not be assumed that limiting values of more than one parameter can be applied to the product at the same
time. Exposure to the absolute maximum ratings for extended periods can adversely affect device reliability.
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Wave Soldering Temp/Time
Aqueous Wash
TSOLD/tsold
P
+2ꢀ0/10 °C/sec
110
+85
3.ꢀ
VCC
50
psi
°C
V
Storage Temperature
Supply Voltage
TS
-40
VCC
VI
-0.5
-0.5
Data Input Voltage
Data Output Current
Relative Humidity
V
ID
mA
%
RH
85
Recommended Operating Conditions
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Ambient Operating Temperature
AFCT-5971LZ
TA
TA
0
+70
+85
°C
°C
1
1
AFCT-5971ALZ
-40
Supply Voltage
VCC
3.1
0.3
3.5
V
2
3
Power Supply Noise Rejection
Transmitter Differential Input Voltage
Data Output Load
PSNR
VD
100
50
mVP-P
V
1.ꢀ
RDL
W
V
Transmit Disable Input Voltage - Low
Transmit Disable Input Voltage - High
Transmit Disable Assert Time
Transmit Disable Deassert Time
TDIS
0.ꢀ
TDIS
2.2
V
TASSERT
TDEASSERT
10
µs
ms
4
5
1.0
Transmitter Electrical Characteristics
AFCT-5971LZ: TA = 0 °C to +70 °C, VCC = 3.1 V to 3.5 V
AFCT-5971ALZ: TA = -40 °C to +85 °C, VCC = 3.1 V to 3.5 V
Parameter
Supply Current
Symbol
ICCT
Min.
Typ.
57
Max.
140
Unit
mA
W
Reference
Power Dissipation
PDIST
0.5
Data Input Voltage Swing (single-ended)
VIH - VIL
250
930
mV
Transmitter Differential
Data Input Current - Low
IIL
-350
µA
µA
Transmitter Differential
Data Input Current - High
IIH
350
Notes:
1. Ambient operating temperature utilizes air flow of 2 ms-1 over the device.
2. The transceiver is class 1 eye safe up to VCC = 3.5 V.
3. Tested with a sinusoidal signal in the frequency range from 10 Hz to 1 MHz on the VCC supply with the recommended power supply filter in
place. Typically less than a 1 dB change in sensitivity is experienced.
4. Time delay from Transmit Disable Assertion to laser shutdown.
5. Time delay from Transmit Disable Deassertion to laser startup.
Receiver Electrical Characteristics
AFCT-5971LZ: TA = 0 °C to +70 °C, VCC = 3.1 V to 3.5 V
AFCT-5971ALZ: TA = -40°C to +85 °C, VCC = 3.1 V to 3.5 V
Parameter
Symbol
Min.
Typ.
Max.
140
0.5
Unit
mA
W
Reference
Supply Current
ICCR
89
ꢀ
Power Dissipation
PDISR
Data Output Voltage Swing (single-ended)
Data Output Rise Time
VOH - VOL
tr
575
930
2.2
mV
ns
7
8
8
9
9
Data Output Fall Time
tf
2.2
ns
Signal Detect Output Voltage - Low
Signal Detect Output Voltage - High
Signal Detect Assert Time (OFF to ON)
Signal Detect Deassert Time (ON to OFF)
VOL - VCC
VOH - VCC
ASMAX
ANSMAX
-1.84
-1.1
-1.ꢀ
-0.88
100
100
V
V
µs
2.3
µs
Notes:
ꢀ. Includes current for biasing Rx data outputs.
7. These outputs are compatible with low voltage PECL inputs.
8. These are 20-80% values.
9. SD is LVPECL compatible when terminated with 50 W to VCC -2 V.
Transmitter Optical Characteristics
AFCT-5971LZ: TA = 0 °C to +70 °C, VCC = 3.1 V to 3.5 V)
AFCT-5971ALZ: TA = -40°C to +85 °C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
dBm
nm
Reference
Output Optical Power 9 µm SMF
Center Wavelength
Spectral Width - rms
Optical Rise Time
Optical Fall Time
POUT
lC
-15
-8
10
12ꢀ1
13ꢀ0
7.7
2
s
nm rms
ns
11
12
12
tr
tf
2
ns
Extinction Ratio
ER
ꢀ
dB
Output Optical Eye
RIN
Compliant with eye mask IEEE 802.3ah- 2004
13
RIN12 (OMA)
TDP
-110
dB/Hz
dB
Transmitter and Dispersion Penalty
Optical Return Loss
Signalling Speed
4.0
12
ORL
dB
125-50 ppm
125+50 ppm MBd
13
Receiver Optical Characteristics
AFCT-5971LZ: TA = 0 °C to +70 °C, VCC = 3.1 V to 3.5 V)
AFCT-5971ALZ: TA = -40°C to +85 °C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Receiver Sensitivity
Receiver Overload
Input Operating Wavelength
Signal Detect - Asserted
Signal Detect - Deasserted
Signal Detect - Hysteresis
Notes:
PIN MIN
-25
dBm avg. 14
dBm avg.
nm
PIN MAX
-8
0
l
12ꢀ1
1580
-25
PA
PD
PH
-39.8
-41.9
1.39
dBm avg.
dBm avg.
dB
-45
0.5
4
10. The output power is coupled into a 1 m single mode fiber. Minimum output optical level is at end of life.
11. The relationship between FWHM and RMS values for spectral width can be derived from the assumption of a Gaussian shaped spectrum which
results in RMS = FWHM/2.35.
12. These are unfiltered 10-90% values.
13. Mask coordinates (X1, X2, X3, Y1, Y2, Y3, Y4) = (0.18, 0.29, 0.35, 0.35, 0.38, 0.4, 0.55).
14. Minimum sensitivity for IEEE 802.3ah test pattern with baseline wander.
Ordering Information
1300 nm FP Laser (Temperature range 0 °C to +70 °C,
AFCT-5971LZ = 2 x 5 LC connector, IR, LVPECL SD with EMI nose shield
1300 nm FP Laser (Temperature range -40°C to +85 °C,
AFCT-5971ALZ = 2 x 5 LC connector, IR, LVPECL SD with EMI nose shield
Class 1 Laser Product: This product conforms to the
applicable requirements of 21 CFR 1040 at the date of
manufacture
Date of Manufacture:
Avago Technologies Inc., No 1 Yishun Ave 7, Singapore
Handling Precautions
1. The AFCT-5971LZ/ALZ can be damaged by current surges or overvoltage. Power supply transient precautions
should be taken.
2. Normal handling precautions for electrostatic sensitive devices should be taken.
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 © 2006 Avago Technologies Limited. All rights reserved. Obsoletes AV01-0207EN
AV02-0638EN - July 31, 2007
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