AFCT-5942LZ [BOARDCOM]
Single Mode SFF Transceivers for SONET OC-48/SDH STM-16 Singlerate Operation;
| 型号： | AFCT-5942LZ |
| 厂家： | 
Broadcom Corporation. |
| 描述： | Single Mode SFF Transceivers for SONET OC-48/SDH STM-16 Singlerate Operation |
| 文件： | 总18页 (文件大小：574K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AFCT-5942xxxZ
Single Mode SFF Transceivers for SONET
OC-48/SDH STM-16 Singlerate Operation
(Part of the Avago Technologies’ METRAK family)
Data Sheet
Features
Description
• AFCT-5942LZ/ALZ: Links of 2 km with 9/125 µm single
mode fiber (SMF)
• AFCT-5942TLZ/ATLZ: Links of 15 km with 9/125 µm
single mode fiber (SMF)
• Multisourced 2 x 10 package style with LC receptacle
• Single +3.3 V power supply
• Temperature range:
The AFCT-5942xxxZ are high performance, cost effective
modules for serial optical data communications applica-
tions. They are designed to provide SONET/SDH compli-
ant links at 2488 Mb/s for both short and intermediate
reach links.
The modules are designed for single mode fiber and op-
erate at a nominal wavelength of 1300 nm. They incorpo-
rate high performance, reliable, long wavelength optical
devices and proven circuit technology to give long life
and consistent service.
AFCT-5942LZ/GZ:
AFCT-5942TLZ/TGZ:
AFCT-5942ALZ/AGZ:
0°C to +70°C
0°C to +70°C
-40°C to +85°C
AFCT-5942ATLZ/ATGZ: -20°C to +85°C
• Wave solder and aqueous wash process compatible
• Manufactured in an ISO9002 certified facility
• RoHS compliant
• Fully Class 1 CDRH/IEC 825 compliant
• Compliant with ITU-T G.957, STM-16, I-16 and S-16.1
Optical Interfaces
• AFCT-5942LZ/ALZ/TLZ/ATLZ: With EMI shield
• AFCT-5942GZ/AGZ/TGZ/ATGZ: Without EMI shield
• Receiver output squelch function enabled
The transmitter section of the AFCT-5942LZ/ALZ/GZ/
AGZ incorporates a 1300 nm Fabry Perot (FP) laser. The
transmitter in the AFCT-5942TLZ/ATLZ/TGZ/ATGZ uses a
Distributed Feedback (DFB) Laser. The transmitter has full
IEC 825 and CDRH Class 1 eye safety.
For each device the receiver section uses an MOVPE
grown planar SEDET PIN photodetector for low dark cur-
rent and excellent responsivity.
A positive ECL logic interface simplifies interface to exter-
nal circuitry.
Applications
• SONET/SDH equipment interconnect
• Client Interface on Metro Gateways and Edge Switches
The transceivers are supplied in the new industry stan-
dard 2 x 10 DIP style package with the LC fiber connec-
tor 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 2.7 Gb/s.
The receiver section for the AFCT-5942xxxZ contains an
InGaAs/InP photo detector and a preamplifier mounted
in an optical subassembly. This optical subassembly is
coupled to a postamp/decision circuit on a circuit board.
The design of the optical assembly is such that it pro-
vides better than 27 dB Optical Return Loss (ORL).
As an optional feature the device also incorporates a
photodetector bias circuit. The circuit works by providing
a mirrored output of the bias current within the photo-
diode. This output must be connected to VCC and can be
monitored by connecting through a series resistor (see
Application Section).
The postamplifier is ac coupled to the preamplifier as il-
lustrated in Figure 1. The coupling capacitors are large
enough to pass the SONET/SDH test pattern at 2488 Mb/s
without significant distortion or performance penalty.
For codes which have a significantly lower frequency
content, jitter and pulse distortion could be degraded.
Noise Immunity
The receiver includes internal circuit components to filter
power supply noise. However under some conditions of
EMI and power supply noise, external power supply filter-
ing may be necessary (see Application Section).
The receiver outputs are squelched at Signal Detect
deasserts. That is, when the light input decreases to typi-
cal -27 dBm or less, the Signal Detect deasserts i.e. the
SD Output goes to a TTL low state. This forces the DATA
OUT and DATA OUT Bar to go PECL levels high and low
respectively.
The Signal Detect Circuit
The signal detect circuit works by sensing the peak level
of the received signal and comparing this level to a refer-
ence. The SD output is low voltage TTL.
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.
PHOTODETECTOR
BIAS
DATA OUT
FILTER
TRANS-
PECL
OUTPUT
BUFFER
IMPEDANCE
PRE-
AMPLIFIER
AMPLIFIER
DATA OUT
GND
TTL
OUTPUT
BUFFER
SIGNAL
DETECT
CIRCUIT
SD
Figure 1. Receiver Block Diagram
2
Functional Description
Transmitter Section
Design
A schematic diagram for the transmitter is shown in
Figure 2. The AFCT-5942LZ/ALZ/GZ/AGZ incorporates an
FP laser as its laser source. and the AFCT-5942TLZ/TGZ/
ATLZ/ATGZ uses a DFB laser as its laser source. Both pack-
ages have been designed to be compliant with IEC 825
eye safety requirements under any single fault condi-
tion and CDRH under normal operating conditions. The
optical output is controlled by a custom IC that detects
the laser output via the monitor photodiode. This IC pro-
vides both dc and ac current drive to the laser to ensure
correct modulation, eye diagram and extinction ratio
over temperature, supply voltage and operating life.
The transmitters also include monitor circuitry for both
the laser diode bias current and laser diode optical
power.
FP or
DFB
LASER
PHOTODIODE
(rear facet monitor)
DATA
DATA
LASER
MODULATOR
PECL
INPUT
LASER BIAS
DRIVER
BMON(+)
BMON(-)
LASER BIAS
CONTROL
PMON(+)
PMON(-)
Figure 2. Simplified Transmitter Schematic
3
Package
The overall package concept for the device consists of
the following basic elements; two optical subassemblies,
a electrical subassembly and the housing as illustrated in
the block diagram in Figure3.
The receiver electrical subassembly includes an internal
shield for the electrical and optical subassembly to en-
sure high immunity to external EMI fields.
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 en-
cased 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 10 DIP.
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 chas-
sis ground.
In combination with the metalized nose segment of the
package a metallic nose clip provides connection to
chassis ground for both EMI and thermal dissipation.
The electrical subassembly consists of high volume mul-
tilayer printed circuit boards on which the IC and various
surface-mounted passive circuit elements are attached.
RX SUPPLY
*
PHOTO DETECTOR
BIAS
DATA OUT
PIN PHOTODIODE
PREAMPLIFIER
SUBASSEMBLY
QUANTIZER IC
DATA OUT
RX GROUND
SIGNAL
DETECT
LC
TX GROUND
RECEPTACLE
DATA IN
DATA IN
Tx DISABLE
BMON(+)
BMON(-)
LASER BIAS
MONITORING
LASER
OPTICAL
SUBASSEMBLY
LASER DRIVER
AND CONTROL
CIRCUIT
LASER DIODE
OUTPUT POWER
MONITORING
PMON(+)
PMON(-)
TX SUPPLY
CASE
* NOSE CLIP PROVIDES CONNECTION TO CHASSIS GROUND FOR BOTH EMI AND THERMAL DISSIPATION.
Figure 3. Block Diagram
4
Figure 4. AFCT-5942xxxZ Package Outline Drawing
5
Connection Diagram
RX
TX
Mounting Studs/
Solder Posts
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
PHOTO DETECTOR BIAS
RECEIVER SIGNAL GROUND
RECEIVER SIGNAL GROUND
NOT CONNECTED
1
2
20
Top 19
LASER DIODE OPTICAL POWER MONITOR - POSITIVE END
LASER DIODE OPTICAL POWER MONITOR - NEGATIVE END
LASER DIODE BIAS CURRENT MONITOR - POSITIVE END
LASER DIODE BIAS CURRENT MONITOR - NEGATIVE END
TRANSMITTER SIGNAL GROUND
TRANSMITTER DATA IN BAR
TRANSMITTER DATA IN
TRANSMITTER DISABLE
TRANSMITTER SIGNAL GROUND
43 View18
5
6
7
8
17
NOT CONNECTED
16
15
14
13
12
11
RECEIVER SIGNAL GROUND
RECEIVER POWER SUPPLY
SIGNAL DETECT
RECEIVER DATA OUTPUT BAR
RECEIVER DATA OUTPUT
9
10
TRANSMITTER POWER SUPPLY
Figure 5. Pin Out Diagram (Top View)
Pin Descriptions:
Pin 1 Photo Detector Bias, VpdR:
Pins 12, 16 Transmitter Signal Ground VEE TX:
This pin enables monitoring of photo detector bias cur-
rent. The pin should either be connected directly to VC-
RX, or to VCCRX through a resistor for monitoring photo
dC etector bias current.
Directly connect these pins to the transmitter signal
ground plane.
Pin 13 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”.
Pins 2, 3, 6 Receiver Signal Ground VEE RX:
Directly connect these pins to the receiver ground plane.
Pins 4, 5 DO NOT CONNECT
Pin 14 Transmitter Data In TD+:
PECL logic family. Internal terminations are provided (Ter-
minations, ac coupling).
Pin 7 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 15 Transmitter Data In Bar TD-:
Internal terminations are provided (Terminations, ac cou-
pling).
Pin 17 Laser Diode Bias Current Monitor - Negative End BMON
The laser diode bias current is accessible by measuring
the differential voltage developed across pins 17 and 18.
–
Pin 8 Signal Detect SD:
Normal optical input levels to the receiver result in a
logic “1”output.
Pin 18 Laser Diode Bias Current Monitor - Positive End BMON
See pin 17 description.
+
Low optical input levels to the receiver result in a logic
“0”output.
This Signal Detect output can be used to drive a TTL in-
put on an upstream circuit, such as Signal Detect input or
Loss of Signal-bar.
Pin 19 Laser Diode Optical Power Monitor - Negative End PMON
–
The back facet diode monitor current is accessible by mea-
suring the differential voltage developed across pins 19
and 20.
Pin 9 Receiver Data Out Bar RD-:
PECL logic family. Output internally biased and ac cou-
pled.
Pin 20 Laser Diode Optical Power Monitor - Positive End PMON
See pin 19 description.
+
Pin 10 Receiver Data Out RD+:
PECL logic family. Output internally biased and ac cou-
pled.
Mounting Studs/Solder Posts
The two mounting studs are provided for transceiver
mechanical attachment to the circuit board. It is recom-
mended that the holes in the circuit board be connected
to chassis ground.
Pin 11 Transmitter Power Supply VCC TX:
Provide +3.3 V dc via the recommended transmitter
power supply filter circuit. Locate the power supply filter
circuit as close as possible to the VCC TX pin.
6
Optical Power Budget and Link Penalties
Application Information
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 establish 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.
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
Technologies sales representative.
The following information is provided to answer some of
the most common questions about the use of the parts.
Electrical and Mechanical Interface
Recommended Circuit
Figure 6 shows the recommended interface for deploying
the Avago Technologies transceivers in a +3.3 V system.
Z= 50Ω
VCC (+3.3 V)
TDIS(LVTTL)
130Ω
BMON
BMON
PMON
PMON
-
TD-
Z= 50Ω
+
NOTE A
130Ω
-
TD+
+
20 19 18 17 16 15 14 13 12 11
VCC (+3.3 V)
C3
1 µH
TX
10 µF
C2
C1
VCC (+3.3 V)
RX
1 µH
RD+
RD-
10 µF
1
2
3
4
5
6
7
8
9 10
Z= 50Ω
VCCRX (+3.3 V)
100Ω
NOTE B
2 kΩ
Z= 50Ω
10 nF
NOTE C
3 kΩ
SD
LVTTL
Note: C1 = C2 = C3 = 10 nF or 100 nF
TD+, TD- INPUTS ARE INTERNALLY TERMINATED AND AC COUPLED.
RD+, RD- OUTPUTS ARE INTERNALLY BIASED AND AC COUPLED.
Note A: CIRCUIT ASSUMES OPEN EMITTER OUTPUT.
Note B: CIRCUIT ASSUMES HIGH IMPENDANCE INTERNAL BIAS @ VCC - 1.3 V.
Note C: THE BIAS RESISTOR FOR VpdR SHOULD NOT EXCEED 2 kΩ
Figure 6. Recommended Interface Circuit
7
Data Line Interconnections
Avago Technologies’ AFCT-5942xxxZ fiber-optic trans-
ceivers are designed to couple to +3.3 V PECL signals.
The transmitter driver circuit regulates the output optical
power. The regulated light output will maintain a con-
stant output optical power provided the data pattern is
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.
Signal Detect is a single-ended, +3.3 V TTL compatible
output signal that is dc-coupled to pin 8 of the module.
Signal Detect should not be ac-coupled externally to the
follow-on circuits because of its infrequent state changes.
The designer also has the option of monitoring the PIN
photo detector bias current. Figure 6 shows a resistor
network, which could be used to do this. Note that the
photo detector bias current pin must be connected to VCC.
Avago Technologies also recommends that a decoupling
capacitor is used on this pin.
The AFCT-5942xxxZ has a transmit disable function which
is a single-ended +3.3 V TTL input which is dc-coupled to
pin 13. In addition the devices offer the designer the op-
tion of monitoring the laser diode bias current and the
laser diode optical power.
Caution should be taken to account for the proper inter-
con-nection between the supporting Physical Layer inte-
grated circuits and these transceivers. Figure 6 illustrates
a recommended interface circuit for interconnecting to a
+3.3 V dc PECL fiber-optic transceiver.
The receiver section is internally ac-coupled between
the preamplifier and the post-amplifier stages. The Data
and Data-bar outputs of the post-amplifier are internally
biased and ac-coupled to their respective output pins
(pins 9, 10).
DIMENSIONSINMILLIMETERS(INCHES)
8.89
(0.35)
*4
3.56
(0.14)
2 x Ø 2.29 MAX . 2 x Ø 1.4 ±0.1
2 x Ø 1.4 ±0.1
(0.055 ±0.004)
7.11
(0.28)
(0.09)
(0.055 ±0.004)
NOTES:
*5
1. THIS
FIGURE
DESCRIBES
THE
RECOMMENDED CIRCUIT BOARD LAYOUT
FOR THE SFF TRANSCEIVER.
4 x Ø 1.4 ±0.1
(0.055 ±0.004)
2. THEHATCHEDAREASAREKEEP-OUTAREAS
RESERVED FOR HOUSING STANDOFFS. NO
METAL TRACES OR GROUND CONNECTION
IN KEEP-OUT AREAS.
10.16
(0.4)
13.34
(0.525)
3. 2 x 10 TRANSCEIVER MODULE REQUIRES 26
PCB HOLES (20 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.
9 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)
20 x Ø 0.81 ±0.1
(0.032 ±0.004)
6
16
3.08
(0.236)
(0.63)
(0.121)
*5. HOLES FOR OPTIONAL HOUSING LEADS
MUST BE TIED TO SIGNAL GROUND.
Figure 7. Recommended Board Layout Hole Pattern
8
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
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 transceivers.
Figure 6 shows the power supply circuit which complies
with the small form factor multisource agreement. It is
further recommended that a continuous ground plane
be provided in the circuit board directly under the trans-
ceiver to provide a low inductance ground for signal
return current. This recommendation is in keeping with
good high frequency board layout practices.
For an optical transmitter device to be eye-safe in the
event of a single fault failure, the transmit-ter must either
maintain eye-safe operation or be disabled.
The AFCT-5942xxxZ 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
remote transmitter is OFF). The Signal Detect thresh-
old is set to transition from a high to low state be-
tween the minimum receiver input optical power and
-35 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.
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 10 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 me-
chanical layout of your circuit board. Figure 8 shows the
front panel dimensions associated with such a layout.
9
Electromagnetic Interference (EMI)
Recommended Solder fluxes
One of a circuit board designer’s foremost concerns is
the control of electromagnetic emissions from electronic
equipment. Success in controlling generated Electro-
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-5942xxxZ to provide good EMI
performance. The EMI performance of a chassis is depen-
dent on physical design and features which help improve
EMI suppression. Avago Technologies encourages using
standard RF suppression practices and avoiding poorly
EMI-sealed enclosures.
Solder fluxes used with the AFCT-5942xxxZ should be
water-soluble, organic fluxes. Recommended solder flux-
es include Lonco 3355-11 from London Chemical West,
Inc. of Burbank, CA, and 100 Flux from Alpha-Metals of
Jersey City, NJ.
Recommended Cleaning/Degreasing Chemicals
Alcohols: methyl, isopropyl, isobutyl.
Aliphatics: hexane, heptane
Other: naphtha.
Do not use par tially halogenated hydrocar-
bons such as 1,1.1 trichloroethane, ketones such
as MEK, acetone, chloroform, ethyl acetate, meth-
ylene 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.
Avago Technologies’ OC-48 LC transceivers (AFCT-
5942xxxZ) have nose shields which provide a convenient
chassis connection to the nose of the transceiver. This
nose shield and the underlying metalization (except ‘G’
options) improve system EMI performance by effectively
closing off the LC aperture. The recommended trans-
ceiver position, PCB layout and panel opening for both
devices are the same, making them mechanically drop-in
compatible. Figure 8 shows the recommended position-
ing of the transceivers with respect to the PCB and face-
plate.
LC SFF Cleaning Recommendations
In the event of contamination of the optical ports, the
recommended cleaning process is the use of forced nitro-
gen. If contamination is thought to have remained, the
optical ports can be cleaned using a NTT international
Cletop stick type (diam. 1.25mm) and HFE7100 cleaning
fluid.
Recommended Solder and Wash Process
The AFCT-5942xxxZ are compatible with industry-stan-
dard wave solder processes.
Process plug
This transceiver is supplied with a process plug for pro-
tection of the optical port within the LC connector recep-
tacle. This process plug prevents contamination during
wave solder and aqueous rinse as well as during han-
dling, shipping and storage. It is made of a high-tempera-
ture, molded sealing material that can withstand +85°C
and a rinse pressure of 110 lbs per square inch.
10
Regulatory Compliance
Immunity
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 designer
in considering their use in equipment designs.
Transceivers will be subject to radio-frequency electro-
magnetic fields following the IEC 61000-4-3 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 60825-1 (+A11).
They are eye safe when used within the data sheet limits
per CDRH. They are also eye safe under normal operating
conditions and under all reasonably foreseeable single
fault conditions per EN60825-1. Avago Technologies
has tested the transceiver design for compliance with
the requirements listed below under normal operating
conditions and under single fault conditions where ap-
plicable. TUV Rheinland has granted certification to these
transceivers for laser eye safety and use in EN 60950 and
EN 60825-2 applications. Their performance enables the
transceivers to be used without concern for eye safety up
to 3.6 V transmitter VCC.
Electrostatic Discharge (ESD)
The device has been tested to comply with MIL-STD-
883E (Method 3015). It is important to use normal ESD
handling precautions for ESD sensitive devices. These
precautions include using grounded wrist straps, work
benches, and floor mats in ESD controlled areas.
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.
Regulatory Compliance - Targeted Specification
Feature
Test Method
Performance
Electrostatic Discharge
MIL-STD-883E
Class 2 (2 kV).
(ESD) to the Electrical Pin Method 3015
Electrostatic Discharge
(ESD) to the LC
Receptacle
Variation of IEC 61000-4-2
Tested to 8 kV contact discharge.
Electromagnetic
Interference (EMI)
FCC Class B
CENELEC EN55022 Class B
(CISPR 22A)
Margins are dependent on customer board and
chassis designs.
VCCI Class I
Immunity
Variation of IEC 61000-4-3
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 and
Equipment Type Testing
US 21 CFR, Subchapter J
per Paragraphs 1002.10
and 1002.12
AEL Class I, FDA/CDRH
CDRH Accession Number: 9521220-140
EN 60825-1: 1994 +A11
EN 60825-2: 1994
AEL Class 1, TUV Rheinland of North America
TUV Bauart License: 933/21203530/290
EN 60950: 1992+A1+A2+A3
Component
Recognition
Underwriters Laboratories and Canadian
Standards Association Joint Component
Recognition for Information Technology
Equipment Including Electrical Business
Equipment.
UL File Number: E173874
RoHS Compliance
Reference to EU RoHS Directive 2002/95/EC
11
CAUTION:
Design Support Materials
There are no user serviceable parts nor any maintenance
required for the AFCT-5942xxxZ. All adjustments are
made at the factory before shipment to our customers.
Avago Technologies has created a number of reference
designs with major PHY IC vendors in order to demon-
state full functionality and interoperability. Such design
Tampering with or modifying the performance of the information and results can be made available to the
parts will result in voided product warranty. It may also
result in improper operation of the circuitry, and pos-
sible overstress of the laser source. Device degradation or
product failure may result.
designer as a technical aid. Please contact your Avago
Technologies representative for further information if
required.
Connection of the devices to a non-approved optical
source, operating above the recommended absolute
maximum conditions or operating the AFCT-5942xxxZ
in a manner inconsistent with its design and function
may result in hazardous radiation exposure and may be
considered an act of modifying or manufacturing 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).
12
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
Storage Temperature
TS
-40
+85
°C
Supply Voltage
VCC
VI
-0.5
-0.5
3.6
VCC
50
85
6
V
1
Data Input Voltage
Data Output Current
Relative Humidity
Receiver Optical Input
V
ID
mA
%
RH
PINABS
0
dBm
Recommended Operating Conditions
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Case Operating Temperature
AFCT-5942LZ/TLZ/GZ/TGZ
AFCT-5942ALZ/AGZ
TC
TC
TC
0
-40
-20
+70
+85
+85
°C
°C
°C
AFCT-5942ATLZ/ATGZ
Supply Voltage
VCC
3.1
3.5
2.4
1.0
0.6
V
Power Supply Rejection
PSR
VD
100
50
mVP-P
V
2
Transmitter Differential Input Voltage
Data Output Load
0.3
W
RDL
TTL Signal Detect Output Current - Low
TTL Signal Detect Output Current - High
Transmit Disable Input Voltage - Low
Transmit Disable Input Voltage - High
Transmit Disable Assert Time
Transmit Disable Deassert Time
IOL
mA
µA
V
IOH
-400
2.2
TDIS
TDIS
V
TASSERT
TDEASSERT
10
50
µs
µs
3
4
Process Compatibility
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Wave Soldering and Aqueous Wash
TSOLD/tSOLD
+260/10 °C/sec.
5
Notes:
1. The transceiver is class 1 eye safe up to VCC = 3.6 V.
2. 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.
3. Time delay from Transmit Disable Assertion to laser shutdown.
4. Time delay from Transmit Disable Deassertion to laser startup.
5. Aqueous wash pressure <110 psi.
13
Transmitter Electrical Characteristics
AFCT-5942LZ / GZ: Tc = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
AFCT-5942ALZ / AGZ: Tc = -40°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Supply Current
ICCT
75
175
mA
Power Dissipation
PDIST
0.25
0.61
W
Data Input Voltage Swing (single-ended)
VIH - VIL
150
1200
mV
Transmitter Differential
Data Input Current - Low
IIL
-350
-2
µA
Transmitter Differential
Data Input Current - High
IIH
18
350
400
µA
Laser Diode Bias Monitor Voltage
Power Monitor Voltage
mV
1, 2
1, 2
10
100
mV
Receiver Electrical Characteristics
AFCT-5942LZ / GZ: Tc = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
AFCT-5942ALZ / AGZ: Tc = -40°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Supply Current
ICCR
85
140
mA
3
Power Dissipation
PDISR
VOH - VOL
tr
0.28
0.49
930
150
150
0.8
W
4
5
6
6
7
7
Data Output Voltage Swing (single-ended)
Data Output Rise Time
575
mV
ps
30
30
Data Output Fall Time
tf
ps
Signal Detect Output Voltage - Low
Signal Detect Output Voltage - High
Signal Detect Assert Time (OFF to ON)
Signal Detect Deassert Time (ON to OFF)
Responsivity
VOL
V
VOH
2.0
0.6
V
ASMAX
ANSMAX
100
100
1.2
µs
µs
0.9
µA/µW
8
Notes:
1. Measured at Tc=+25°C.
2. The laser bias monitor current and laser diode optical power are accessible by measuring the differential voltages developed across correspond-
ing pins.
3. Includes current for biasing Rx data outputs.
4. Power dissipation value is the power dissipated in the receiver itself. It is calculated as the sum of the products of VCC and ICC minus the sum of
the products of the output voltages and currents.
5. These outputs are compatible with 10 k, 10 kH, and 100 k ECL and PECL inputs.
6. These are 20 - 80% values.
7. SD is LVTTL compatible.
8. Responsivity is valid for input optical power from -18 dBm to -4 dBm at 1310 nm.
14
Transmitter Optical Characteristics
AFCT-5942LZ / GZ: Tc = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
AFCT-5942ALZ / AGZ: Tc = -40°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Output Optical Power 9 µm SMF
POUT
-10
-6
-3
dBm
1
Center Wavelength
Spectral Width - rms
Optical Rise Time
Optical Fall Time
Extinction Ratio
lC
s
1260
1360
4
nm
nm rms
ps
1
2
3
3
tr
40
80
12
100
225
tf
ps
ER
8.2
dB
Output Optical Eye
Compliant with eye mask Telcordia GR-253-GORE
-8.5
Back Reflection Sensitivity
dB
4
5
5
pk to pk
RMS
70
7
mUI
mUI
Jitter Generation
Receiver Optical Characteristics
AFCT-5942LZ / GZ: Tc = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
AFCT-5942ALZ / AGZ: Tc = -40°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Receiver Sensitivity
PIN MIN
-21.5
-19
dBm avg.
6
Receiver Overload
PIN MAX
-3
+1
dBm avg.
nm
6
l
Input Operating Wavelength
Signal Detect - Asserted
Signal Detect - Deasserted
Signal Detect - Hysteresis
Reflectance
1260
1570
-19.5
PA
PD
PH
-24
dBm avg.
dBm avg.
dB
-35
0.5
-26.4
2.4
4
-35
-27
dB
Notes:
1. The output power is coupled into a 1 m single-mode fiber. Minimum output optical level is at end of life.
2. 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.
3. These are unfiltered 20 - 80% values.
4. This meets the“desired”requirement in SONET specification (GR253).The figure given is the allowable mismatch for 1 dB degradation in receiver
sensitivity.
5. For the jitter measurements, the device was driven with SONET OC-48C data pattern filled with a 223-1 PRBS payload.
6. PIN represents the typical optical input sensitivity of the receiver. Minimum sensitivity (PINMIN) and saturation (PINMAX) levels for a 223-1 PRBS with
72 ones and 72 zeros inserted. Over the range the receiver is guaranteed to provide output data with a Bit Error Rate better than or equal to
1 x 10-10
.
15
Transmitter Electrical Characteristics
AFCT-5942TLZ/TGZ: Tc = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
AFCT-5942ATLZ/ATGZ: Tc = -20°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Supply Current
ICCT
100
175
mA
Power Dissipation
PDIST
0.33
0.61
W
Data Input Voltage Swing (single-ended)
VIH - VIL
150
1200
mV
Transmitter Differential
Data Input Current - Low
IIL
-350
-2
µA
Transmitter Differential
Data Input Current - High
IIH
18
350
400
µA
Laser Diode Bias Monitor Voltage
Power Monitor Voltage
mV
1
1
10
100
mV
Receiver Electrical Characteristics
AFCT-5942TLZ / TGZ: Tc = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
AFCT-5942ATLZ / ATGZ: Tc = -20°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Supply Current
ICCR
85
140
0.49
930
150
150
0.8
mA
W
2
Power Dissipation
PDISR
VOH - VOL
tr
0.28
3
4
5
5
6
6
Data Output Voltage Swing (single-ended)
Data Output Rise Time
575
mV
ps
30
30
Data Output Fall Time
tf
ps
Signal Detect Output Voltage - Low
Signal Detect Output Voltage - High
Signal Detect Assert Time (OFF to ON)
Signal Detect Deassert Time (ON to OFF)
Responsivity
VOL
V
VOH
2.0
0.6
V
ASMAX
ANSMAX
100
100
1.2
µs
µs
0.9
µA/µW
7
Notes:
1. Measured at Tc = +25°C.
2. Includes current for biasing Rx data outputs.
3. Power dissipation value is the power dissipated in the receiver itself. It is calculated as the sum of the products of VCC and ICC minus the sum of
the products of the output voltages and currents.
4. These outputs are compatible with 10 k, 10 kH, and 100 k ECL and PECL inputs.
5. These are 20 - 80% values.
6. SD is LVTTL compatible.
7. Responsivity is valid for input optical power from -18 dBm to -4 dBm at 1310 nm.
16
Transmitter Optical Characteristics
AFCT-5942TLZ / TGZ: Tc = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
AFCT-5942ATLZ / ATGZ: Tc = -20°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Output Optical Power 9 µm SMF
POUT
-5
-2.5
0
dBm
1
Center Wavelength
Spectral Width
lC
1260
30
1360
1
nm
s
nm (pk -20 dB)
2
Side Mode Suppression Ratio
Optical Rise Time
Optical Fall Time
SMSR
dB
ns
ns
dB
tr
35
100
225
3
3
tf
67
Extinction Ratio
ER
8.2
10.5
Output Optical Eye
Compliant with eye mask Telcordia GR-253-CORE
-8.5
Back Reflection Sensitivity
dB
4
5
5
pk to pk
RMS
70
7
mUI
mUI
Jitter Generation
Receiver Optical Characteristics
AFCT-5942TLZ / TGZ: Tc = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
AFCT-5942ATLZ / ATGZ: Tc = -40°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Receiver Sensitivity
PIN MIN
-22.5
-19
dBm avg.
6
Receiver Overload
PIN MAX
0
+1
dBm avg.
nm
6
Input Operating Wavelength
Signal Detect - Asserted
Signal Detect - Deasserted
Signal Detect - Hysteresis
Reflectance
l
1260
1570
-19.5
PA
PD
PH
-24
dBm avg.
dBm avg.
dB
-35
0.5
-26.4
2.4
4
-35
-27
dB
Notes:
1. The output power is coupled into a 1 m single-mode fiber. Minimum output optical level is at end of life.
2. Spectral width of main laser peak measured 20 dB below peak spectral density.
3. These are unfiltered 20 - 80% values.
4. This meets the “desired”requirement in SONET specification (GR253). The figure given is the allowable mismatch for 1 dB degradation in re-
ceiver sensitivity.
5. For the jitter measurements, the device was driven with SONET OC-48C data pattern filled with a 223-1 PRBS payload.
6. PIN represents the typical optical input sensitivity of the receiver. Minimum sensitivity (PINMIN) and saturation (PINMAX) levels for a 223-1 PRBS
with 72 ones and 72 zeros inserted. Over the range the receiver is guaranteed to provide output data with a Bit Error Rate better than or
equal to
1 x 10-10
.
17
Ordering Information
Handling Precautions
1. The AFCT-5942xxxZ 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.
1300 nm FP Laser (Temperature range 0°C to +70°C)
AFCT-5942LZ
AFCT-5942GZ
1300 nm FP Laser (Temperature range -40°C to +85°C)
AFCT-5942ALZ
AFCT-5942AGZ
Class 1 Laser Product:
1300 nm DFB Laser (Temperature range 0°C to +70°C)
This product conforms to the applicable requirements
of 21 CFR 1040 at the date of manufacture
AFCT-5942TLZ
AFCT-5942TGZ
Date of Manufacture:
1300 nm DFB Laser (Temperature range -20°C to +85°C)
Avago Technologies Inc., No 1 Yishun Ave 7, Singapore
AFCT-5942ATLZ
AFCT-5942ATGZ
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 in the United States and other countries.
Data subject to change. Copyright © 2005-2009 Avago Technologies. All rights reserved.
AV02-0811EN - June 1, 2009
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