HFCT-5944TL [AVAGO]
FIBER OPTIC TRANSCEIVER, 1260-1360nm, 2700Mbps(Tx), 2700Mbps(Rx), THROUGH HOLE MOUNT, DIP, LC CONNECTOR;
| 型号： | HFCT-5944TL |
| 厂家： | 
AVAGO TECHNOLOGIES LIMITED |
| 描述： | FIBER OPTIC TRANSCEIVER, 1260-1360nm, 2700Mbps(Tx), 2700Mbps(Rx), THROUGH HOLE MOUNT, DIP, LC CONNECTOR 光纤 |
| 文件： | 总18页 (文件大小：435K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HFCT-5944xxx
Single Mode SFF Transceivers for SONET OC-48/SDH STM-16 Multirate
Operation (Part of the Avago Technologies METRAK family)
Data Sheet
Description
Features
The HFCT-5944xxx are high performance, cost effective
modules for serial optical data communications ap-
plications that range from 125 Mb/s to 2.7 Gb/s. They
are designed to provide SONET/SDH compliant links at
2488 Mb/s for both short and intermediate reach links.
•
•
Multirate operation from 125 Mb/s to 2.7 Gb/s
HFCT-5944L/AL: Links of 2 km with 9/125 µm single
mode fiber (SMF)
•
HFCT-5944TL/ATL: 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
The 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.
Temperature range:
HFCT-5944L/G:
0°C to +70°C
0°C to +70°C
HFCT-5944TL/TG:
HFCT-5944AL/AG: -40°C to +85°C
HFCT-5944ATL/ATG: -20°C to +85°C
Wave solder and aqueous wash process compatible
Manufactured in an ISO9002 certified facility
Fully Class 1 CDRH/IEC 825 compliant
Compliant with ITU-T G.957 STM-16, I-16 and S-16.1
Optical Interfaces
HFCT-5944L/AL/TL/ATL: metalized nose and EMI
shield
HFCT-5944G/AG/TG/ATG: no metalization and no EMI
shield
The transmitter section of the HFCT-5944L/AL/G/AG
incorporates a 1300 nm Fabry Perot (FP) laser. The
transmitter in the HFCT-5944TL/ATL/TG/ATG uses a
Distributed Feedback (DFB) Laser packaged in conjunc-
tion with an optical isolator for excellent back reflection
performance. 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
current and excellent responsivity.
A positive ECL logic interface simplifies interface to ex-
ternal circuitry.
Applications
•
•
SONET/SDH equipment interconnect
Multirate 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
Noise Immunity
The receiver section for the HFCT-5944xxx 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
provides better than 27 dB Optical Return Loss (ORL).
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 Signal Detect Circuit
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 155 Mb/
s, 622 Mb/s and 2488 Mb/s without significant distor-
tion or performance penalty. For multirate applications
the sensitivity will meet the maximum SONET specifica-
tion for OC48 across all datarates (-19 dBm), also for DC
balanced codes, e.g. 8B/10B. For codes which have a
significantly lower frequency content, jitter and pulse
distortion could be degraded.
The signal detect circuit works by sensing the peak level
of the received signal and comparing this level to a ref-
erence. 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.
These components will reduce the sensitivity of the re-
ceiver as the signal bit rate is increased above 2.7 Gb/s.
As an optional feature the device also incorporates a
photodetector bias circuit. The circuit works by provid-
ing a mirrored output of the bias current within the
photodiode. This output must be connected to VCC and
can be monitored by connecting through a series resis-
tor (see Application Section).
PHOTODETECTOR
BIAS
DATA OUT
FILTER
TRANS-
IMPEDANCE
PRE-
PECL
OUTPUT
BUFFER
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 Fig-
ure 2. The HFCT-5944L/AL/G/AG incorporates an FP laser
and the HFCT-5944TL/TG/ATL/ATG uses a DFB packaged
in conjunction with an optical isolator. Both packages
have been designed to be compliant with IEC 825 eye
safety requirements under any single fault condition
and CDRH under normal operating conditions. The op-
tical 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
PHOTODIODE
(rear facet monitor)
LASER
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 subassem-
blies, two electrical subassemblies and the housing as
illustrated in the block diagram in Figure3.
The optical subassemblies are each attached to their
respective transmit or receive electrical subassemblies.
These two units are then fitted within the outer housing
of the transceiver that is molded of filled nonconductive
plastic to provide mechanical strength. The housing is
then encased with a metal EMI protective shield. The
case is signal ground and we recommend soldering the
four ground tabs to host card signal ground.
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 pcb’s for the two electrical subassemblies both car-
ry the signal pins that exit from the bottom of the trans-
ceiver. The solder posts are fastened into the molding of
the device and are designed to provide the mechanical
strength required to withstand the loads imposed on
the transceiver 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.
In combination witht he metalized nose segment of the
package a metallic nose clip provides connection to
chassis ground for both EMI and thermal dissipation.
The electrical subassemblies consist of high volume
multilayer printed circuit boards on which the IC and
various surface-mounted passive circuit elements are
attached.
The receiver electrical subassembly includes an internal
shield for the electrical and optical subassembly to en-
sure high immunity to external EMI fields.
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
+ 0
13.59
0.535
13.59
(0.535)
MAX
- 0.2
+0
15.0 0.2
(0.591 0.008)
(
)
-0.008
TOP VIEW
48.5 0.2
(1.91 0.008)
6.25
(0.246)
4.06 0.1
(0.16 0.004)
10.8 0.2
(0.425 0.008)
9.8
(0.386)
MAX
3.81 0.15
(0.15 0.006)
Ø 1.07 0.1
(0.042 0.004)
9.6 0.2
(0.378 0.008)
1
0.1
0.25 0.1
(0.01 0.004)
20 x 0.5 0.2
(0.02 0.008)
(0.039 0.004)
10.16 0.1
(0.4 0.004)
1
0.1
19.5 0.3
(0.768 0.012)
(0.039 0.004)
BACK VIEW
FRONT VIEW
SIDE VIEW
1.78 0.1
(0.07 0.004)
48.5 0.2
(1.91 0.008)
9.8
(0.386)
MAX
G MODULE - NO EMI NOSE SHIELD
3.81 0.1
(0.15 0.004)
0.25 0.1
(0.01 0.004)
20 x 0.5 0.2
(0.02 0.008)
1.78 0.1
(0.07 0.004)
Ø 1.07 0.1
(0.042 0.004)
1
0.1
19.5 0.3
(0.768 0.012)
(0.039 0.004)
SIDE VIEW
20 x 0.25 0.1 (PIN THICKNESS)
(0.01 0.004)
NOTE: END OF PINS
CHAMFERED
BOTTOM VIEW
DIMENSIONS IN MILLIMETERS (INCHES)
DIMENSIONS SHOWN ARE NOMINAL. ALL DIMENSIONS MEET THE MAXIMUM PACKAGE OUTLINE DRAWING IN THE SFF MSA.
Figure 4. HFCT-5944xxx Package Outline Drawing
5
Connection Diagram
RX
TX
Mounting Studs/
Solder Posts
Package
Grounding Tabs
o
o
o
o
o
o
o
o
o
o
o
PHOTO DETECTOR BIAS
RECEIVER SIGNAL GROUND
RECEIVER SIGNAL GROUND
NOT CONNECTED
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
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
o
o
o
o
o
o
o
o
o
Top
View
NOT CONNECTED
RECEIVER SIGNAL GROUND
RECEIVER POWER SUPPLY
SIGNAL DETECT
RECEIVER DATA OUTPUT BAR
RECEIVER DATA OUTPUT
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 V TX:
Directly connect these pins to the EtEransmitter signal
ground plane.
This pin enables monitoring of photo detector bias cur-
rent. The pin should either be connected directly to VC-
CRX, or to VCCRX through a resistor for monitoring photo
detector bias current.
Pin 13 Transmitter Disable T :
Optional feature, connectDItShis 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.
Pin 14 Transmitter Data In TD+:
PECL logic family. Internal terminations are provided
(Terminations, ac coupling).
Pins 4, 5 DO NOT CONNECT
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
coupling).
Pin 17 Laser Diode Bias Current Monitor - Negative End
BMON–
Pin 8 Signal Detect SD:
The laser diode bias current is accessible by measuring
the voltage developed across pins 17 and 18. Dividing
the voltage by 10 Ohms (internal) will yield the value of
the laser bias current.
Normal optical input levels to the receiver result in a
logic “1” output. Low optical input levels to the receiver
result in a logic “0” output. This Signal Detect output
can be used to drive a TTL input on an upstream circuit,
such as Signal Detect input or Loss of Signal-bar.
Pin 18 Laser Diode Bias Current Monitor - Positive End
BMON
+
Pin 9 Receiver Data Out Bar RD-:
PECL logic family. Output internally biased and ac
coupled.
See pin 17 description.
Pin 19 Laser Diode Optical Power Monitor - Negative End
PMON
–
Pin 10 Receiver Data Out RD+:
PECL logic family. Output internally biased and ac
coupled.
The back facet diode monitor current is accessible by
measuring the voltage developed across pins 19 and 20.
The voltage across a 200 Ohm resistor between pins 19
and 20 will be proportional to the photo current.
Pin 11 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.
6
Optical Power Budget and Link Penalties
Pin 20 Laser Diode Optical Power Monitor - Positive End
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.
PMON
+
See pin 19 description.
Mounting Studs/Solder Posts
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.
Package Grounding Tabs
Connect four package grounding tabs to signal ground.
Electrical and Mechanical Interface
Recommended Circuit
Figure 6 shows the recommended interface for deploy-
ing the Avago Technologies transceivers in a +3.3 V
system.
Application Information
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.
Z = 50 W
VCC (+3.3 V)
TDIS (LVTTL)
130 W
BMON
-
TD-
Z = 50 W
BMON
+
NOTE A
130 W
PMON
PMON
-
TD+
+
20 19 18 17 16 15 14 13 12 11
VCC (+3.3 V)
1 µH
TX
10 µF
C2
C1
C3
VCC (+3.3 V)
RX
1 µH
RD+
RD-
10 µF
1
2
3
4
5
6
7
8
9
10
Z = 50 W
VCCRX (+3.3 V)
2 kW
100 W
NOTE B
Z = 50 W
10 nF
NOTE C
3 k
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 kW.
Figure 6. Recommended Interface Circuit
7
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 inter-
nally biased and ac-coupled to their respective output
pins (pins 9, 10).
Data Line Interconnections
Avago Technologies’ HFCT-5944xxx 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 constant 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 pre-
set 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 de-
coupling capacitor is used on this pin.
The HFCT-5944xxx 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
option of monitoring the laser diode bias current and
the laser diode optical power. The voltage measured
between pins 17 and 18 is proportional to the bias cur-
rent through an internal 10 Ω resistor. Similarly the opti-
cal power rear facet monitor circuit provides a photo
current which is proportional to the voltage measured
between pins 19 and 20, this voltage is measured across
an internal 200 Ω resistor.
Caution should be taken to account for the proper in-
tercon-nection between the supporting Physical Layer
integrated circuits and these transceivers. Figure 6 il-
lustrates a recommended interface circuit for intercon-
necting to a +3.3 V dc PECL fiber-optic transceiver.
8.89
(0.35)
3.56
(0.14)
2 x Ų 2.29 MAX. 2 x Ų 1.4 ±0.1
2 x Ų 1.4 ±0.1
(0.055 ±0.004)
7.11
(0.28)
(0.09)
(0.055 ±0.004)
4 x Ų 1.4 ±0.1
(0.055 ±0.004)
10.16
13.34
(0.4)
(0.525)
7.59
(0.299)
9.59
(0.378)
2
(0.079)
9 x 1.78
(0.07)
2
3
3
2 x Ų 2.29
(0.09)
(0.079)
(0.118)
(0.118)
4.57
(0.18)
20 x Ų 0.81 ±0.1
(0.032 ±0.004)
6
16
3.08
(0.236)
(0.63)
(0.121)
DIMENSIONS IN MILLIMETERS (INCHES)
NOTES:
1. THIS FIGURE DESCRIBES THE RECOMMENDED CIRCUIT BOARD LAYOUT FOR THE SFF TRANSCEIVER.
2. THE HATCHED AREAS ARE KEEP-OUT AREAS RESERVED FOR HOUSING STANDOFFS. NO METAL TRACES OR
GROUND CONNECTION IN KEEP-OUT AREAS.
3. 2 x 10 TRANSCEIVER MODULE REQUIRES 26 PCB HOLES (20 I/O PINS, 2 SOLDER POSTS AND 4 PACKAGE
GROUNDING TABS).
PACKAGE GROUNDING TABS SHOULD BE CONNECTED TO SIGNAL GROUND.
4. THE MOUNTING STUDS SHOULD BE SOLDERED TO CHASSIS GROUND FOR MECHANICAL INTEGRITY AND TO
ENSURE FOOTPRINT COMPATIBILITY WITH OTHER SFF TRANSCEIVERS.
5. HOLES FOR 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
transceiver to provide a low inductance ground for sig-
nal 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 ei-
ther maintain eye-safe operation or be disabled.
The HFCT-5944xxx 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 transmit-
ter 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 mechanical layout of your circuit board. Figure 8
shows the front panel dimensions associated with such
a layout.
9
Electromagnetic Interference (EMI)
Package and Handling Instructions
One of a circuit board designer’s foremost concerns is
the control of electromagnetic emissions from elec-
tronic equipment. Success in controlling generated
Electromagnetic Interference (EMI) enables the designer
to pass a governmental agency’s EMI regulatory stan-
dard and more importantly, it reduces the possibility of
interference to neighboring equipment. Avago Tech-
nologies has designed the HFCT-5944xxx to provide
good EMI performance. The EMI performance of a chas-
sis 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.
Flammability
The HFCT-5944xxx transceiver housing consists of high
strength, heat resistant and UL 94 V-0 flame retardant
plastic and metal packaging.
Recommended Solder and Wash Process
The HFCT-5944xxx are compatible with industry-stan-
dard wave solder processes.
Process plug
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.
Avago Technologies’ OC-48 LC transceivers (HFCT-
5944xxx) 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 effec-
tively closing off the LC aperture. Localized shielding is
also improved by tying the four metal housing package
grounding tabs to signal ground on the PCB. Though
not obvious by inspection, the nose shield and metal
housing are electrically separated for customers who
do not wish to directly tie chassis and signal grounds
together. The recommended transceiver position, PCB
layout and panel opening for both devices are the same,
making them mechanically drop-in compatible. Figure
8 shows the recommended positioning of the transceiv-
ers with respect to the PCB and faceplate.
Recommended Solder fluxes
Solder fluxes used with the HFCT-5944xxx 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-Met-
als of Jersey City, NJ.
Recommended Cleaning/Degreasing Chemicals
Alcohols: methyl, isopropyl, isobutyl.
Aliphatics: hexane, heptane
Other: naphtha.
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.
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. 1.25mm) and HFE7100
cleaning fluid.
10
Regulatory Compliance
Eye Safety
The Regulatory Compliance for transceiver performance These laser-based transceivers are classified as AEL
is shown in Table 1. The overall equipment design will Class I (U.S. 21 CFR(J) and AEL Class 1 per EN 60825-
determine the certification level. The transceiver perfor- 1 (+A11). They are eye safe when used within the
mance is offered as a figure of merit to assist the design- data sheet limits per CDRH. They are also eye safe
er in considering their use in equipment designs.
under normal operating conditions and under all
reasonably foreseeable single fault conditions per
EN60825-1. Avago Technologies has tested the trans-
ceiver design for compliance with the requirements
listed below under normal operating conditions and
under single fault conditions where applicable. TUV
Rheinland has granted certification to these trans-
ceivers 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.
Immunity
Transceivers will be subject to radio-frequency electro-
magnetic fields following the IEC 61000-4-3 test method.
Table 1: 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
Variation of IEC 61000-4-2
Tested to 8 kV contact discharge.
(ESD) to the LC Receptacle
Electromagnetic
Interference (EMI)
FCC Class B
CENELEC EN55022 Class B
(CISPR 22A)
Margins are dependent on customer board and chas-
sis 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:
HFCT-5944L/AL ) 9521220 - 37
HFCT-5944ATL/TL ) 9521220 - 38
HFCT-5944ATG/AG/G/TG ) 9521220 - 41
AEL Class 1, TUV Rheinland of North America
TUV Bauart License:
EN 60825-1: 1994 +A11
EN 60825-2: 1994
EN 60950: 1992+A1+A2+A3
HFCT-5944L/GL/AL/AG ) 933/510111/04
HFCT-5944ATL/ATG/TL/TG ) 933/510111/05
Component Recognition Underwriters Laboratories and Canadian
Standards Association Joint Component
Recognition for Information Technology
Equipment Including Electrical Business
Equipment.
UL File Number: E173874
11
CAUTION:
There are no user serviceable parts nor any mainte-
nance required for the HFCT-5944xxx. All adjustments
are made at the factory before shipment to our custom-
ers. Tampering with or modifying the performance 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 degrada-
tion or product failure may result.
Connection of the devices to a non-approved optical
source, operating above the recommended absolute
maximum conditions or operating the HFCT-5944xxx
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 (Subchap-
ter J).
12
Absolute Maximum Ratings (HFCT-5944xxx)
Stresses in excess of the absolute maximum ratings can cause catastrophic damage to the device. Limits apply to each parame-
ter 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.
-40
Typ.
Max.
+85
3.6
VCC
50
Unit
°C
Reference
Storage Temperature
Supply Voltage
TS
VCC
VI
-0.5
-0.5
V
1
Data Input Voltage
Data Output Current
Relative Humidity
Receiver Optical Input
V
ID
mA
%
RH
PINABS
0
85
6
dBm
Recommended Operating Conditions (HFCT-5944xxx)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Ambient Operating Temperature
HFCT-5944L/TL/G/TG
HFCT-5944AL/AG
TA
TA
TA
0
-40
-20
+70
+85
+85
°C
°C
°C
2
2
2
HFCT-5944ATL/ATG
Supply Voltage
VCC
3.1
3.5
2.4
1.0
0.6
V
Power Supply Rejection
PSR
VD
100
50
mVP-P
V
3
Transmitter Differential Input Voltage
Data Output Load
0.3
RDL
W
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
4
5
Process Compatibility (HFCT-5944xxx)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Reference
Wave Soldering and Aqueous Wash
TSOLD/tSOLD
+260/10 °C/sec.
6
Notes:
1. The transceiver is class 1 eye safe up to VCC = 3.6 V.
2. Ambient operating temperature utilizes air flow of 2 ms-1 over the device.
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.
6. Aqueous wash pressure <110 psi.
13
Transmitter Electrical Characteristics
HFCT-5944L/G: TA = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
HFCT-5944AL/AG: TA = -40°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
ICCT
Min.
Typ.
100
Max.
175
Unit
mA
W
Reference
Supply Current
Power Dissipation
PDIST
VIH - VIL
IIL
0.33
0.61
1200
Data Input Voltage Swing (single-ended)
Transmitter Differential Data Input Current - Low
Transmitter Differential Data Input Current - High
Laser Diode Bias Monitor Voltage
Power Monitor Voltage
150
mV
µA
-350
-2
IIH
18
350
400
100
µA
mV
mV
1, 2
1, 2
10
Receiver Electrical Characteristics
HFCT-5944L/G: TA = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
HFCT-5944AL/AG: TA = -40°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
ICCR
Min.
Typ.
Max.
Unit
Reference
Supply Current
115
140
0.49
930
150
150
0.8
mA
W
3
4
5
6
6
7
7
Power Dissipation
PDISR
VOH - VOL
tr
0.38
Data Output Voltage Swing (single-ended)
Data Output Rise Time
575
mV
ps
125
125
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 TA =+25°C.
2. The laser bias monitor current and laser diode optical power are calculated as ratios of the corresponding voltages to their current sensing
resistors, 10 W and 200 W (under modulation).
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
HFCT-5944L/G: TA = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
HFCT-5944AL/AG: TA = -40°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
-10
Typ.
Max.
-3
Unit
dBm
nm
Reference
Output Optical Power 9 µm SMF
Center Wavelength
Spectral Width - rms
Optical Rise Time
POUT
lC
s
-6
1
1260
1360
4
1.8
30
nm rms
ps
2
3
3
tr
70
Optical Fall Time
tf
150
12
225
ps
Extinction Ratio
ER
8.2
dB
Output Optical Eye
Back Reflection Sensitivity
Jitter Generation
Compliant with eye mask Telcordia GR-253-GORE
-8.5
dB
4
5
5
pk to pk
RMS
70
7
mUI
mUI
Receiver Optical Characteristics
HFCT-5944L/G: TA = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
HFCT-5944AL/AG: TA = -40°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
PIN MIN
PIN MAX
l
Min.
Typ.
-23
+1
Max.
Unit
Reference
Receiver Sensitivity
Receiver Overload
-19
dBm avg.
dBm avg.
nm
6, 7
6
-3
Input Operating Wavelength
Signal Detect - Asserted
Signal Detect - Deasserted
Signal Detect - Hysteresis
Reflectance
1260
1570
-19.5
PA
-27.3
-28.7
1.4
dBm avg.
dBm avg.
dB
PD
-35
0.5
PH
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 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. For multirate applications the sensitivity will meet the maximum SONET specification for OC48 across all datarates (-19
dBm).
7. Beginning of life sensitivity at +25°C is -22 dBm (worst case).
15
Transmitter Electrical Characteristics
HFCT-5944TL/TG: TA = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
HFCT-5944ATL/ATG: TA = -20°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
ICCT
Min.
Typ.
100
Max.
175
Unit
mA
W
Reference
Supply Current
Power Dissipation
PDIST
VIH - VIL
IIL
0.33
0.61
1200
Data Input Voltage Swing (single-ended)
Transmitter Differential Data Input Current - Low
Transmitter Differential Data Input Current - High
Laser Diode Bias Monitor Voltage
Power Monitor Voltage
150
mV
µA
-350
-2
IIH
18
350
400
100
µA
0
mV
mV
1, 2
1, 2
10
Receiver Electrical Characteristics
HFCT-5944TL/TG: TA = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
HFCT-5944ATL/ATG: TA = -20°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
ICCR
Min.
Typ.
115
Max.
140
0.49
930
150
150
0.8
Unit
mA
W
Reference
Supply Current
3
4
5
6
6
7
7
Power Dissipation
PDISR
VOH - VOL
tr
0.38
Data Output Voltage Swing (single-ended)
Data Output Rise Time
575
mV
ps
ps
V
125
125
Data Output Fall Time
tf
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
VOH
2.0
0.6
V
ASMAX
ANSMAX
100
100
1.2
µs
µs
0.9
µA/µW
8
Notes:
1. Measured at TA =+25°C.
2. The laser bias monitor current and laser diode optical power are calculated as ratios of the corresponding voltages to their current sensing
resistors, 10 W and 200 W (under modulation).
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.
16
Transmitter Optical Characteristics
HFCT-5944TL/TG: TA = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
HFCT-5944ATL/ATG: TA = -20°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
Min.
-5
Typ.
Max.
0
Unit
Reference
Output Optical Power 9 µm SMF
Center Wavelength
Spectral Width
POUT
lC
-3
dBm
1
1260
1360
1
nm
s
nm (pk -20 dB)
2
Side Mode Suppression Ratio
Optical Rise Time
SMSR
tr
30
dB
ns
ns
dB
3
3
Optical Fall Time
tf
Extinction Ratio
ER
8.2
10.5
Output Optical Eye
Back Reflection Sensitivity
Jitter Generation
Compliant with eye mask Telcordia GR-253-CORE
-8.5
dB
4
5
5
pk to pk
RMS
70
7
mUI
mUI
Receiver Optical Characteristics
HFCT-5944TL/TG: TA = 0°C to +70°C, VCC = 3.1 V to 3.5 V)
HFCT-5944ATL/ATG: TA = -20°C to +85°C, VCC = 3.1 V to 3.5 V)
Parameter
Symbol
PIN MIN
PIN MAX
l
Min.
Typ.
-23
+1
Max.
Unit
Reference
Receiver Sensitivity
Receiver Overload
-19
dBm avg.
dBm avg.
nm
6, 7
6
0
Input Operating Wavelength
Signal Detect - Asserted
Signal Detect - Deasserted
Signal Detect - Hysteresis
Reflectance
1260
1570
-19.5
PA
-27.3
-28.7
1.4
dBm avg.
dBm avg.
dB
PD
-35
0.5
PH
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. For multirate applications the sensitivity will meet the maximum SONET specification for OC48 across all datarates (-19
dBm).
7. Beginning of life sensitivity at +25°C is -22 dBm (worst case).
17
Design Support Materials
Class 1 Laser Product: This product conforms to the
applicable requirements of 21 CFR 1040 at the date of
manufacture
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
information and results can be made available to the
designer as a technical aid. Please contact your Avago
Technologies representative for further information if
required.
Date of Manufacture:
Avago Technologies Inc., No 1 Yishun Ave 7, Singapore
Handling Precautions
1. The HFCT-5944xxx can be damaged by current surges
or overvoltage. Power supply transient precautions
should be taken.
Ordering Information
1300 nm FP Laser
(Temperature range 0°C to +70°C)
HFCT-5944L
2. Normal handling precautions for electrostatic sensi-
tive devices should be taken.
HFCT-5944G
1300 nm FP Laser
(Temperature range -40°C to +85°C)
HFCT-5944AL
HFCT-5944AG
1300 nm DFB Laser
(Temperature range 0°C to +70°C)
HFCT-5944TL
HFCT-5944TG
1300 nm DFB Laser
(Temperature range -20°C to +85°C)
HFCT-5944ATL
HFCT-5944ATG
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, Pte. in the United States and other countries.
Data subject to change. Copyright © 2006 Avago Technologies Pte. All rights reserved.
5988-8282EN - July 4, 2006
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