Transmitters and receivers are
directly compatible with popular
“industry-standard” connectors:
ST, SMA, SC and FC. They are
completely specified with
multiple fiber sizes; including
50/125 µm, 62.5/125 µm, 100/
140 µm, and 200 µm.
Complete evaluation kits are
available for ST product
offerings; including transmitter,
receiver, connectored cable, and
technical literature. In addition,
ST connectored cables are
available for evaluation.
Low Cost, Miniature Fiber
Optic Components with ST®,
SMA, SC and FC Ports
Technical Data HFBR-0400 Series
HFBR-14xx Transmitters
HFBR-24xx Receivers
Features
• Meets IEEE 802.3 Ethernet
and 802.5 Token Ring
Standards
• Low Cost Transmitters and
Receivers
• Choice of ST®, SMA, SC or
FC Ports
• 820 nm Wavelength
Technology
• Signal Rates up to 160
Megabaud
• Link Distances up to 2.7 km
• Specified with 50/125 µm,
62.5/125 µm, 100/140 µm,
and 200 µm HCS® Fiber
• Repeatable ST Connections
within 0.2 dB Typical
• Unique Optical Port Design
for Efficient Coupling
• Auto-Insertable and Wave
Solderable
• No Board Mounting Hard-
ware Required
• Wide Operating
Temperature Range
-40°C to 85°C
• AlGaAs Emitters 100%
Burn-In Ensures High
Reliability
• Conductive Port Option
Applications
• Local Area Networks
• Computer to Peripheral
Links
• Computer Monitor Links
• Digital Cross Connect Links
• Central Office Switch/PBX
Links
• Video Links
• Modems and Multiplexers
• Suitable for Tempest
Systems
• Industrial Control Links
Description
The HFBR-0400 Series of compo-
nents is designed to provide cost
effective, high performance fiber
optic communication links for
information systems and
industrial applications with link
distances of up to 2.7 kilometers.
With the HFBR-24X6, the 125
MHz analog receiver, data rates
of up to 160 megabaud are
attainable.
ST® is a registered trademark of AT&T.
HCS® is a registered trademark of the SpecTran Corporation.
2
LINK SELECTION GUIDE
Data Rate (MBd) Distance (m) Transmitter Receiver Fiber Size (µm) Evaluation Kit
5 1500 HFBR-14X2 HFBR-24X2 200 HCS N/A
5 2000 HFBR-14X4 HFBR-24X2 62.5/125 HFBR-0410
20 2700 HFBR-14X4 HFBR-24X6 62.5/125 HFBR-0414
32 2200 HFBR-14X4 HFBR-24X6 62.5/125 HFBR-0414
55 1400 HFBR-14X4 HFBR-24X6 62.5/125 HFBR-0414
125 700 HFBR-14X4 HFBR-24X6 62.5/125 HFBR-0416
155 600 HFBR-14X4 HFBR-24X6 62.5/125 HFBR-0416
160 500 HFBR-14X4 HFBR-24X6 62.5/125 HFBR-0416
For additional information on specific links see the following individual link descriptions. Distances measured over temperature range
from 0 to 70°C.
Applications Support
Guide
This section gives the designer
information necessary to use the
HFBR-0400 series components to
make a functional fiber-optic
transceiver. Agilent offers a wide
selection of evaluation kits for
hands-on experience with fiber-
optic products as well as a wide
Application Literature
Title Description
HFBR-0400 Series Transmitter & Receiver Reliability Data
Reliability Data
Application Bulletin 78 Low Cost Fiber Optic Links for Digital Applications up to 155 MBd
Application Note 1038 Complete Fiber Solutions for IEEE 802.3 FOIRL, 10Base-FB and 10 Base-FL
Application Note 1065 Complete Solutions for IEEE 802.5J Fiber-Optic Token Ring
Application Note 1073 HFBR-0319 Test Fixture for 1X9 Fiber Optic Transceivers
Application Note 1086 Optical Fiber Interconnections in Telecommunication Products
Application Note 1121 DC to 32 MBd Fiber-Optic Solutions
Application Note 1122 2 to 70 MBd Fiber-Optic Solutions
Application Note 1123 20 to 160 MBd Fiber-Optic Solutions
Application Note 1137 Generic Printed Circuit Layout Rules
range of application notes com-
plete with circuit diagrams and
board layouts. Furthermore,
Agilent’s application support
group is always ready to assist
with any design consideration.
Available Options
HFBR-1402 HFBR-1414
HFBR-1404 HFBR-1414M
HFBR-1412 HFBR-1414T
HFBR-1412T HFBR-1424
HFBR-1412TM HFBR-2412TC
HFBR-14E4 HFBR-2416
HFBR-2402 HFBR-2416M
HFBR-2406 HFBR-2412
HFBR-2412T HFBR-2416TC
HFBR-2422
HFBR-24E6
HFBR-2416T
HFBR-0400 Series Part Number Guide
HFBR X4XXaa
1 = Transmitter Option T (Threaded Port Option)
2 = Receiver Option C (Conductive Port Receiver Option)
Option M (Metal Port Option)
4 = 820 nm Transmitter and
Receiver Products
0 = SMA, Housed
1 = ST, Housed
2 = FC, Housed
E = SC, Housed
2 = Tx, Standard Power
4 = Tx, High Power
2 = Rx, 5 MBd, TTL Output
6 = Rx, 125 MHz, Analog Output
3
HFBR-0400 Series
Evaluation Kits
HFBR-0410 ST Evaluation Kit
Contains the following :
• One HFBR-1412 transmitter
• One HFBR-2412 five megabaud
TTL receiver
• Three meters of ST connec-
tored 62.5/125 (µm fiber optic
cable with low cost plastic
ferrules.
• Related literature
HFBR-0414 ST Evaluation Kit
Includes additional components
to interface to the transmitter and
receiver as well as the PCB to
reduce design time.
Contains the following:
• One HFBR-1414T transmitter
• One HFBR-2416T receiver
• Three meters of ST connec-
tored 62.5/125 µm fiber optic
cable
• Printed circuit board
• ML-4622 CP Data Quantizer
• 74ACTllOOON LED Driver
• LT1016CN8 Comparator
• 4.7 µH Inductor
• Related literature
HFBR-0400 SMA Evaluation
Kit
Contains the following :
• One HFBR-1402 transmitter
• One HFBR-2402 five megabaud
TTL receiver
• Two meters of SMA
connectored 1000 µm plastic
optical fiber
• Related literature
HFBR-0416 Evaluation Kit
Contains the following:
• One fully assembled 1x9
transceiver board for 155 MBd
evaluation including:
-HFBR-1414 transmitter
-HFBR-2416 receiver
-circuitry
• Related literature
Package and Handling
Information
Package Information
All HFBR-0400 Series
transmitters and receivers are
housed in a low-cost, dual-inline
package that is made of high
strength, heat resistant, chem-
ically resistant, and UL 94V-O
flame retardant ULTEM® (plastic
(UL File #E121562). The
transmitters are easily identified
by the light grey color connector
port. The receivers are easily
identified by the dark grey color
connector port. (Black color for
conductive port.) The package is
designed for auto-insertion and
wave soldering so it is ideal for
high volume production
applications.
Handling and Design
Information
Each part comes with a protective
port cap or plug covering the
optics. These caps/plugs will vary
by port style. When soldering, it
is advisable to leave the protec-
tive cap on the unit to keep the
optics clean. Good system
performance requires clean port
optics and cable ferrules to avoid
obstructing the optical path.
Clean compressed air often is
sufficient to remove particles of
dirt; methanol on a cotton swab
also works well.
Recommended Chemicals for
Cleaning/Degreasing
HFBR-0400 Products
Alcohols: methyl, isopropyl,
isobutyl. Aliphatics: hexane,
heptane, Other: soap solution,
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, Agilent
does not recommend the use of
cleaners that use halogenated
hydrocarbons because of their
potential environmental harm.
Ultem® is a registered Trademark of the GE corporation.
4
Mechanical Dimensions
SMA Port
HFBR-X40X
6.35
(0.25)
2.54
(0.10)
3.81
(0.15)
6.4
(0.25)DIA.
12.7
(0.50)
12.7
(0.50)
22.2
(0.87)
5.1
(0.20)
10.2
(0.40)
3.6
(0.14)
1.27
(0.05)
2.54
(0.10)
PINS 1,4,5,8
0.51 X 0.38
(0.020 X 0.015)
PINS 2,3,6,7
0.46
(0.018)DIA.
8
135
24
6
7
PIN NO. 1
INDICATOR
1/4 - 36 UNS 2A THREAD
Rx/Tx
COUNTRY OF
ORIGIN
A YYWW
HFBR-X40X
Mechanical Dimensions
ST Port
HFBR-X41X
8.2
(0.32)
Rx/Tx
COUNTRY OF
ORIGIN
A YYWW
HFBR-X41X
6.35
(0.25)
12.7
(0.50)
27.2
(1.07)
5.1
(0.20)
10.2
(0.40)
3.6
(0.14)
1.27
(0.05)
2.54
(0.10)
PINS 1,4,5,8
0.51 X 0.38
(0.020 X 0.015)
PINS 2,3,6,7
0.46
(0.018)DIA.
8
135
24
6
7
PIN NO. 1
INDICATOR
2.54
(0.10)
3.81
(0.15)
DIA.
12.7
(0.50)
7.0
(0.28)
5
Mechanical Dimensions
Threaded ST Port
HFBR-X41XT
5.1
(0.20)
3/8 - 32 UNEF - 2A
Rx/Tx
COUNTRY OF
ORIGIN
A YYWW
HFBR-X41XT
8.4
(0.33)
6.35
(0.25)
12.7
(0.50)
27.2
(1.07)
5.1
(0.20)
10.2
(0.40)
3.6
(0.14)
1.27
(0.05)
2.54
(0.10)
PINS 1,4,5,8
0.51 X 0.38
(0.020 X 0.015)
PINS 2,3,6,7
0.46
(0.018)DIA.
8
135
24
6
7
PIN NO. 1
INDICATOR
2.54
(0.10)
3.81
(0.15)
DIA.
12.7
(0.50)
7.1
(0.28)
DIA.
7.6
(0.30)
Mechanical Dimensions
FC Port
M8 x 0.75 6G
THREAD (METRIC)
Rx/Tx
COUNTRY OF
ORIGIN
A YYWW
HFBR-X42X
2.5
(0.10)
3.81
(0.15)
7.9
(0.31)
12.7
(0.50)
12.7
(0.50)
5.1
(0.20)
10.2
(0.40)
3.6
(0.14)
8
135
24
6
7
PIN NO. 1
INDICATOR
19.6
(0.77)
2.5
(0.10)
HFBR-X42X
6
HFBR-X4EX
28.65
(1.128)
15.95
(0.628)
10.0
(0.394)
12.7
(0.500)
Rx/Tx
COUNTRY OF
ORIGIN
A YYWW
HFBR-X4EX
12.7
(0.50)
2.54
(0.10)
3.81
(0.15)
6.35
(0.25)
5.1
(0.200)
10.38
(0.409)
3.60
(0.140)
1.27
(0.050)
2.54
(0.100)
Mechanical Dimensions
SC Port
7
Figure 1. HFBR-0400 ST Series Cross-Sectional View.
Panel Mount Hardware
Port Cap Hardware
HFBR-4402: 500 SMA Port Caps
HFBR-4120: 500 ST Port Plugs (120 psi)
HFBR-4401: for SMA Ports HFBR-4411: for ST Ports
(Each HFBR-4401 and HFBR-4411 kit consists of 100 nuts and 100 washers.)
HOUSING
CONNECTOR PORT
HEADER
EPOXY BACKFILL
PORT GROUNDING PATH INSERT
LED OR DETECTOR IC
LENS–SPHERE
(ON TRANSMITTERS ONLY)
LENS–WINDOW
7.87
(0.310)
7.87
(0.310)DIA.
1/4 - 36 UNEF -
2B THREAD
1.65
(0.065)
TYP.
DIA.
6.61
(0.260)DIA.
HEX-NUT
WASHER
0.14
(0.005)
14.27
(0.563)
12.70
(0.50)DIA.
3/8 - 32 UNEF -
2B THREAD
1.65
(0.065)
TYP.
DIA.
10.41
(0.410)MAX.
DIA.
HEX-NUT
WASHER
0.46
(0.018)
3/8 - 32 UNEF -
2A THREADING
0.2 IN.
WALL
WASHER
NUT
1 THREAD
AVAILABLE
DATE CODE
PART
NUMBER
Rx/Tx
COUNTRY OF
ORIGIN
A YYWW
HFBR-X40X
8
Options
In addition to the various port
styles available for the HFBR-
0400 series products, there are
also several extra options that
can be ordered. To order an
option, simply place the corre-
sponding option number at the
end of the part number. See page
2 for available options.
Option T (Threaded Port
Option)
• Allows ST style port com-
ponents to be panel mounted.
• Compatible with all current
makes of ST multimode
connectors
• Mechanical dimensions are
compliant with MIL-STD-
83522/13
• Maximum wall thickness when
using nuts and washers from
the HFBR-4411 hardware kit is
2.8 mm (0.11 inch)
• Available on all ST ports
Option C (Conductive Port
Receiver Option)
• Designed to withstand electro-
static discharge (ESD) of 25kV
to the port
• Significantly reduces effect of
electromagnetic interference
(EMI) on receiver sensitivity
• Allows designer to separate the
signal and conductive port
grounds
• Recommended for use in noisy
environments
• Available on SMA and threaded
ST port style receivers only
Option M (Metal Port Option)
• Nickel plated aluminum con-
nector receptacle
• Designed to withstand electro-
static discharge (ESD) of 15kV
to the port
• Significantly reduces effect of
electromagnetic interference
(EMI) on receiver sensitivity
• Allows designer to separate the
signal and metal port grounds
• Recommended for use in very
noisy environments
• Available on SMA, ST, and
threaded ST ports
9
Typical Link Data
HFBR-0400 Series
Description
The following technical data is
taken from 4 popular links using
the HFBR-0400 series: the 5 MBd
link, Ethernet 20 MBd link,
Token Ring 32 MBd link, and the
155 MBd link. The data given
corresponds to transceiver solu-
tions combining the HFBR-0400
series components and various
recommended transceiver design
circuits using off-the-shelf
electrical components. This data
is meant to be regarded as an
example of typical link perform-
ance for a given design and does
not call out any link limitations.
Please refer to the appropriate
application note given for each
link to obtain more information.
5 MBd Link (HFBR-14XX/24X2)
Link Performance -40°C to +85°C unless otherwise specified
Parameter Symbol Min. Typ. Max. Units Conditions Reference
Optical Power Budget OPB50 4.2 9.6 dB HFBR-14X4/24X2 Note 1
with 50/125 µm fiber NA = 0.2
Optical Power Budget OPB62.5 8.0 15 dB HFBR-14X4/24X2 Note 1
with 62.5/125 µm fiber NA = 0.27
Optical Power Budget OPB100 8.0 15 dB HFBR-14X2/24X2 Note 1
with 100/140 µm fiber NA = 0.30
Optical Power Budget OPB200 12 20 dB HFBR-14X2/24X2 Note 1
with 200 µm fiber NA = 0.37
Date Rate Synchronous dc 5 MBd Note 2
Asynchronous dc 2.5 MBd Note 3,
Fig. 7
Propagation Delay tPLH 72 ns T
A = 25°C, Figs. 6, 7, 8
LOW to HIGH PR = -21 dBm Peak
Propagation Delay tPHL 46 ns
HIGH to LOW
System Pulse Width tPLH-tPHL 26 ns Fiber cable
Distortion length = 1 m
Bit Error Rate BER 10-9 Data Rate <5 Bd
PR > -24 dBm Peak
Notes:
1. OPB at TA = -40 to 85°C, VCC = 5.0 V dc, IF ON = 60 mA. PR = -24 dBm peak.
2. Synchronous data rate limit is based on these assumptions: a) 50% duty factor modulation, e.g., Manchester I or BiPhase
Manchester II; b) continuous data; c) PLL Phase Lock Loop demodulation; d) TTL threshold.
3. Asynchronous data rate limit is based on these assumptions: a) NRZ data; b) arbitrary timing-no duty factor restriction; c) TTL
threshold.
10
5 MBd Logic Link Design
If resistor R1 in Figure 2 is
70.4 Ω, a forward current IF of
48 mA is applied to the HFBR-
14X4 LED transmitter. With IF =
48 mA the HFBR-14X4/24X2
logic link is guaranteed to work
with 62.5/125 µm fiber optic
cable over the entire range of 0
to 1750 meters at a data rate of
dc to 5 MBd, with arbitrary data
format and pulse width distortion
typically less than 25%. By
setting R1 = 115 Ω, the transmit-
ter can be driven with IF= 30 mA,
if it is desired to economize on
power or achieve lower pulse
distortion.
The following example will illus-
trate the technique for selecting
the appropriate value of IF and R1.
Maximum distance required
= 400 meters. From Figure 3 the
drive current should be 15 mA.
From the transmitter data
VF= 1.5 V (max.) at IF = 15 mA
as shown in Figure 9.
VCC - VF5 V - 1.5 V
R1 = ––––––– = –––––––––
IF15 mA
R1 = 233 Ω
The curves in Figures 3, 4, and 5
are constructed assuming no in-
line splice or any additional
system loss. Should the link
consists of any in-line splices,
these curves can still be used to
calculate link limits provided they
are shifted by the additional
system loss expressed in dB. For
example, Figure 3 indicates that
with 48 mA of transmitter drive
current, a 1.75 km link distance
is achievable with 62.5/125 µm
fiber which has a maximum
attenuation of 4 dB/km. With
2 dB of additional system loss, a
1.25 km link distance is still
achievable.
Figure 2. Typical Circuit Configuration.
11
Figure 6. Propagation Delay through
System with One Meter of Cable.
Figure 8. System Propagation Delay Test Circuit and Waveform Timing Definitions.
Figure 3. HFBR-1414/HFBR-2412
Link Design Limits with 62.5/125 µm
Cable.
Figure 4. HFBR-14X2/HFBR-24X2
Link Design Limits with 100/140 µm
Cable.
Figure 7. Typical Distortion of Pseudo
Random Data at 5 Mb/s.
Figure 5. HFBR-14X4/HFBR-24X2
Link Design Limits with 50/125 µm
Cable.
0
-1
-2
-3
-4
-5
-6 0 0.4 0.8 1.2 1.6 2
10 LOG (t/to) NORMALIZED TRANSMITTER CURRENT (dB)
LINK LENGTH (km)
IF – TRANSMITTER FORWARD CURRENT – (mA)
60
50
40
30
20
WORST CASE
-40°C, +85°C
UNDERDRIVE
CABLE ATTENUATION dB/km
α MAX (-40°C, +85°C) 4
α MIN (-40°C, +85°C) 1
α TYP (-40°C, +85°C) 2.8
TYPICAL 26°C
UNDERDRIVE
75
-22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12
PR – RECEIVER POWER – dBm
tPLH OR tPHL PROPOGATION DELAY –ns
70
65
60
55
50
45
40
35
30
25
20
tPLH (TYP) @ 25°C
tPHL (TYP) @ 25°C
55
-22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12
P
R
– RECEIVER POWER – dBm
t
D
– NRZ DISTORTION – ns
50
45
40
35
30
25
20
12
Ethernet 20 MBd Link (HFBR-14X4/24X6)
(refer to Application Note 1038 for details)
Typical Link Performance
Parameter Symbol Typ.[1,2] Units Conditions
Receiver Sensitivity -34.4 dBm 20 MBd D2D2 Hexadecimal Data
average 2 km 62.5/125 µm fiber
Link Jitter 7.56 ns pk-pk ECL Out Receiver
7.03 ns pk-pk TTL Out Receiver
Transmitter Jitter 0.763 ns pk-pk 20 MBd D2D2 Hexadecimal Data
Optical Power PT-15.2 dBm 20 MBd D2D2 Hexadecimal Data
average Peak IF,ON = 60 mA
LED rise time tr1.30 ns 1 MHz Square Wave Input
LED fall time tf3.08 ns
Mean difference |tr-tf
| 1.77 ns
Bit Error Rate BER 10-10
Output Eye Opening 36.7 ns At AUI Receiver Output
Data Format 50% Duty Factor 20 MBd
Notes:
1. Typical data at TA = 25°C, VCC = 5.0 V dc.
2. Typical performance of circuits shown in Figure 1 and Figure 3 of AN-1038 (see applications support section).
Token Ring 32 MBd Link (HFBR-14X4/24X6)
(refer to Application Note 1065 for details)
Typical Link Performance
Parameter Symbol Typ.[1,2] Units Conditions
Receiver Sensitivity -34.1 dBm 32 MBd D2D2 Hexadecimal Data
average 2 km 62.5/125 µm fiber
Link Jitter 6.91 ns pk-pk ECL Out Receiver
5.52 ns pk-pk TTL Out Receiver
Transmitter Jitter 0.823 ns pk-pk 32 MBd D2D2 Hexadecimal Data
Optical Power Logic Level “0” PT ON -12.2 dBm peak Transmitter TTL in IF ON = 60 mA,
Optical Power Logic Level “1” PT OFF -82.2
LED Rise Time tr1.3 nsec 1 MHz Square Wave Input
LED Fall Time tf3.08 nsec
Mean Difference |tr-tf
| 1.77 nsec
Bit Error Rate BER 10-10
Data Format 50% Duty Factor 32 MBd
Notes:
1. Typical data at TA = 25°C, VCC = 5.0 V dc.
2. Typical performance of circuits shown in Figure 1 and Figure 3 of AN-1065 (see applications support section)
IF OFF = 1 mA
13
155 MBd Link (HFBR-14X4/24X6)
(refer to Application Bulletin 78 for details)
Typical Link Performance
Parameter Symbol Typ.[1,2] Units Max. Units Conditions Ref.
Optical Power Budget OPB50 7.9 13.9 dB NA = 0.2 Note 2
with 50/125 µm fiber
Optical Power Budget OPB62 11.7 17.7 dB NA = 0.27
with 62.5/125 µm fiber
Optical Power Budget OPB100 11.7 17.7 dB NA = 0.30
with 100/140 µm fiber
Optical Power Budget OPB200 16.0 22.0 dB NA = 0.35
with 200 µm HCSfFiber
Data Format 20% to 1 175 MBd
80% Duty Factor
System Pulse Width |tPLH-t
PHL| 1 ns PR = -7 dBm Peak
Distortion 1 meter 62.5/125 µm fiber
Bit Error Rate BER 10-9 Data Rate < 100 MBaud
PR >-31 dBm Peak Note 2
Notes:
1. Typical data at TA = 25°C, VCC = 5.0 V dc, PECL serial interface.
2. Typical OPB was determined at a probability of error (BER) of 10-9. Lower probabilities of error can be achieved with short fibers
that have less optical loss.
14
HFBR-14X2/14X4 Low-
Cost High-Speed
Transmitters
Description
The HFBR-14XX fiber optic
transmitter contains an 820 nm
AlGaAs emitter capable of
efficiently launching optical
power into four different optical
fiber sizes: 50/125 µm, 62.5/125
µm, 100/140 µm, and 200 µm
HCS®. This allows the designer
flexibility in choosing the fiber
size. The HFBR-14XX is designed
to operate with the Agilent
HFBR-24XX fiber optic receivers.
The HFBR-14XX transmitter’s
high coupling efficiency allows
the emitter to be driven at low
current levels resulting in low
power consumption and increased
reliability of the transmitter. The
HFBR-14X4 high power transmit-
ter is optimized for small size
fiber and typically can launch
-15.8 dBm optical power at
60 mA into 50/125 µm fiber and
-12 dBm into 62.5/125 µm fiber.
The HFBR-14X2 standard
transmitter typically can launch
-12 dBm of optical power at
60 mA into 100/140 µm fiber
cable. It is ideal for large size
fiber such as 100/140 µm. The
high launched optical power level
is useful for systems where star
couplers, taps, or inline connec-
tors create large fixed losses.
Consistent coupling efficiency is
assured by the double-lens optical
system (Figure 1). Power coupled
into any of the three fiber types
varies less than 5 dB from part to
part at a given drive current and
temperature. Consistent coupling
efficiency reduces receiver
dynamic range requirements
which allows for longer link
lengths.
Absolute Maximum Ratings
Parameter Symbol Min. Max. Units Reference
Storage Temperature TS-55 +85 °C
Operating Temperature TA-40 +85 °C
Lead Soldering Cycle Temp. +260 °C
Time 10 sec
Forward Input Current Peak IFPK 200 mA Note 1
dc IFdc 100 mA
Reverse Input Voltage VBR 1.8 V
Housed Product
Unhoused Product
15
HFBR-14X2 Output Power Measured Out of 1 Meter of Cable
Parameter Symbol Min. Typ.[2] Max. Unit Conditions Reference
50/125 µmP
T50 -21.8 -18.8 -16.8 dBm TA = 25°CI
F
= 60 mA dc Notes 5, 6, 9
-22.8 -15.8
-20.3 -16.8 -14.4 TA = 25°CI
F
= 100 mA dc
-21.9 -13.8
62.5/125 µmP
T62 -19.0 -16.0 -14.0 dBm TA = 25°CI
F
= 60 mA dc
-20.0 -13.0
-17.5 -14.0 -11.6 TA = 25°CI
F
= 100 mA dc
-19.1 -11.0
100/140 µmP
T100 -15.0 -12.0 -10.0 dBm TA = 25°CI
F
= 60 mA dc
16.0 -9.0
-13.5 -10.0 -7.6 TA = 25°CI
F
= 100 mA dc
-15.1 -7.0
200 µm HCS PT200 -10.7 -7.1 -4.7 dBm TA = 25°CI
F
= 60 mA dc
-11.7 -3.7
-9.2 -5.2 -2.3 TA = 25°CI
F
= 100 mA dc
-10.8 -1.7
Electrical/Optical Specifications -40°C to +85°C unless otherwise specified.
Parameter Symbol Min. Typ.[2] Max. Units Conditions Reference
Forward Voltage VF1.48 1.70 2.09 V IF = 60 mA dc Figure 9
1.84 IF = 100 mA dc
Forward Voltage ∆VF/∆T -0.22 mV/°CI
F
= 60 mA dc Figure 9
-0.18 IF = 100 mA dc
Reverse Input Voltage VBR 1.8 3.8 V IF = 100 µA dc
Peak Emission Wavelength λP792 820 865 nm
Diode Capacitance CT55 pF V = 0, f = 1 MHz
Optical Power Temperature ∆PT/∆T -0.006 dB/°C I = 60 mA dc
-0.010 I = 100 mA dc
Thermal Resistance θJA 260 °C/W Notes 3, 8
14X2 Numerical Aperture NA 0.49
14X4 Numerical Aperture NA 0.31
14X2 Optical Port Diameter D 290 µm Note 4
14X4 Optical Port Diameter D 150 µm Note 4
Coefficient
peak
peak
peak
peak
Fiber Cable
NA = 0.2
Fiber Cable
NA = 0.275
Fiber Cable
NA = 0.3
Fiber Cable
NA = 0.37
CAUTION: The small junction sizes inherent to the design of these components increase the components’
susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be
taken in handling and assembly of these components to prevent damage and/or degradation which may be
induced by ESD.
Temperature Coefficient
16
HFBR-14X4 Output Power Measured out of 1 Meter of Cable
Parameter Symbol Min. Typ.[2] Max. Unit Conditions Reference
50/125 µm PT50 -18.8 -15.8 -13.8 dBm TA = 25°CI
F
= 60 mA dc Notes 5, 6, 9
-19.8 -12.8
-17.3 -13.8 -11.4 TA = 25°CI
F
= 100 mA dc
-18.9 -10.8
62.5/125 µm PT62 -15.0 -12.0 -10.0 dBm TA = 25°CI
F
= 60 mA dc
-16.0 -9.0
-13.5 -10.0 -7.6 TA = 25°CI
F
= 100 mA dc
-15.1 -7.0
100/140 µm PT100 -9.5 -6.5 -4.5 dBm TA = 25°CI
F
= 60 mA dc
-10.5 -3.5
-8.0 -4.5 -2.1 TA = 25°CI
F
= 100 mA dc
-9.6 -1.5
200 µm HCS PT200 -5.2 -3.7 +0.8 dBm TA = 25°CI
F
= 60 mA dc
-6.2 +1.8
-3.7 -1.7 +3.2 TA = 25°CI
F
= 100 mA dc
-5.3 +3.8
peak
peak
peak
peak
Fiber Cable
NA = 0.2
Fiber Cable
NA = 0.275
Fiber Cable
NA = 0.3
Fiber Cable
NA = 0.37
14X2/14X4 Dynamic Characteristics
Parameter Symbol Min. Typ.[2] Max. Units Conditions Reference
Rise Time, Fall Time tr, tf4.0 6.5 nsec IF = 60 mA Note 7,
(10% to 90%) No Pre-bias Figure 12
Rise Time, Fall Time tr, tf3.0 nsec IF = 10 to Note 7,
(10% to 90%) 100 mA Figure 11
Pulse Width Distortion PWD 0.5 nsec Figure 11
Notes:
1. For IFPK > 100 mA, the time duration should not exceed 2 ns.
2. Typical data at TA = 25°C.
3. Thermal resistance is measured with the transmitter coupled to a connector assembly and mounted on a printed circuit board.
4. D is measured at the plane of the fiber face and defines a diameter where the optical power density is within 10 dB of the
maximum.
5. PT is measured with a large area detector at the end of 1 meter of mode stripped cable, with an ST® precision ceramic ferrule (MIL-
STD-83522/13) for HFBR-1412/1414, and with an SMA 905 precision ceramic ferrule for HFBR-1402/1404.
6. When changing µW to dBm, the optical power is referenced to 1 mW (1000 µW). Optical Power P (dBm) = 10 log P (µW)/1000 µW.
7. Pre-bias is recommended if signal rate >10 MBd, see recommended drive circuit in Figure 11.
8. Pins 2, 6 and 7 are welded to the anode header connection to minimize the thermal resistance from junction to ambient. To further
reduce the thermal resistance, the anode trace should be made as large as is consistent with good RF circuit design.
9. Fiber NA is measured at the end of 2 meters of mode stripped fiber, using the far-field pattern. NA is defined as the sine of the half
angle,determined at 5% of the peak intensity point. When using other manufacturer’s fiber cable, results will vary due to differing
NA values and specification methods.
All HFBR-14XX LED transmitters are classified as IEC 825-1 Accessible Emission Limit (AEL)
Class 1 based upon the current proposed draft scheduled to go in to effect on January 1, 1997.
AEL Class 1 LED devices are considered eye safe. Contact your Agilent sales representative for
more information.
CAUTION: The small junction sizes inherent to the design of these components increase the components’
susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be
taken in handling and assembly of these components to prevent damage and/or degradation which may be
induced by ESD.
17
Recommended Drive
Circuits
The circuit used to supply current
to the LED transmitter can
significantly influence the optical
switching characteristics of the
LED. The optical rise/fall times
and propagation delays can be
improved by using the appro-
priate circuit techniques. The
LED drive circuit shown in
Figure 11 uses frequency com-
pensation to reduce the typical
rise/fall times of the LED and a
small pre-bias voltage to minimize
propagation delay differences
that cause pulse-width distortion.
The circuit will typically produce
rise/fall times of 3 ns, and a total
jitter including pulse-width dis-
tortion of less than 1 ns. This
circuit is recommended for appli-
cations requiring low edge jitter
or high-speed data transmission
at signal rates of up to 155 MBd.
Component values for this circuit
can be calculated for different
LED drive currents using the
equations shown below. For
additional details about LED
drive circuits, the reader is
encouraged to read Agilent
Application Bulletin 78 and
Application Note 1038.
()
()
(VCC - VF) + 3.97 (VCC - VF - 1.6 V) (5 - 1.84) + 3.97 (5 - 1.84 - 1.6)
Ry = ––––––––––––––––––––––––––––––– Ry = –––––––––––––––––––––––––––––
IF ON (A) 0.100
1 Ry3.16 + 6.19
RX1 = – –––– Ry = ––––––––––– = 93.5 Ω
2 3.97 0.100
1 93.5
REQ2(Ω) = RX1 - 1 RX1 = – –––– = 11.8 Ω
2 3.97
RX2 = RX3 = RX4 = 3(REQ2)R
EQ2 = 11.8 - 1 = 10.8 Ω
2000(ps)
C(pF) = –––––––– RX2 = RX3 = RX4 = 3(10.8) = 32.4 Ω
RX1(Ω)
2000 ps
Example for IF ON = 100 mA: VF can be C = ––––––– = 169 pF
11.8 Ω
obtained from Figure 9 (= 1.84 V).
18
Figure 9. Forward Voltage and
Current Characteristics.
Figure 12. Test Circuit for Measuring tr, tf.
Figure 11. Recommended Drive Circuit.
Figure 10. Normalized Transmitter
Output vs. Forward Current.
P(IF) – P(60 mA) – RELATIVE POWER RATIO
0
2.0
0.8
0
IF – FORWARD CURRENT – mA
20 40 80
1.6
0.4
1.2
60 100
1.8
1.4
1.0
0.6
0.2
10 30 50 70 90
P(IF) – P(60 mA) – RELATIVE POWER RATIO – dB
-7.0
-5.0
-4.0
-3.0
-2.0
-1.0
0
0.8
1.0
1.4
2.0
3.0
19
HFBR-24X2 Low-Cost
5 MBd Receiver
Description
The HFBR-24X2 fiber optic
receiver is designed to operate
with the Hewlett-Packard HFBR-
14XX fiber optic transmitter and
50/125 µm, 62.5/125 µm, 100/
140 µm, and 200 µm HCS® fiber
optic cable. Consistent coupling
into the receiver is assured by the
lensed optical system (Figure 1).
Response does not vary with fiber
size ≤0.100 µm.
The HFBR-24X2 receiver incor-
porates an integrated photo IC
containing a photodetector and
dc amplifier driving an open-
collector Schottky output
transistor. The HFBR-24X2 is
Housed Product
Unhoused Product
designed for direct interfacing to
popular logic families. The
absence of an internal pull-up
resistor allows the open-collector
output to be used with logic
families such as CMOS requiring
voltage excursions much higher
than VCC.
Both the open-collector “Data”
output Pin 6 and VCC Pin 2 are
referenced to “Com” Pin 3, 7. The
“Data” output allows busing,
strobing and wired “OR” circuit
configurations. The transmitter is
designed to operate from a single
+5 V supply. It is essential that a
bypass capacitor (0.1 µF
ceramic) be connected from
Pin 2 (VCC) to Pin 3 (circuit
common) of the receiver.
Absolute Maximum Ratings
Parameter Symbol Min. Max. Units Reference
Storage Temperature TS-55 +85 °C
Operating Temperature TA-40 +85 °C
Lead Soldering Cycle Temp. +260 °C Note 1
Time 10 sec
Supply Voltage VCC -0.5 7.0 V
Output Current IO25 mA
Output Voltage VO-0.5 18.0 V
Output Collector Power Dissipation PO AV 40 mW
Fan Out (TTL) N 5 Note 2
PIN FUNCTION
1
2
3
4
VCC (5 V)
COMMON
DATA
COMMON
20
Dynamic Characteristics
-40°C to +85°C unless otherwise specified; 4.75 V ≤VCC ≤5.25 V; BER ≤10-9
Parameter Symbol Min. Typ.[3] Max. Units Conditions Reference
Peak Optical Input Power PRH -40 dBm pk λP = 820 nm Note 5
0.1 µW pk
Peak Optical Input Power PRL -25.4 -9.2 dBm pk TA = +25°C, Note 5
2.9 120 µW pk
-24.0 -10.0 dBm pk IOL = 8 mA
4.0 100 µW pk
Propagation Delay LOW tPLHR 65 ns TA = 25°C, Note 6
to HIGH PR = -21 dBm,
Propagation Delay HIGH tPHLR 49 ns
to LOW
Notes:
1. 2.0 mm from where leads enter case.
2. 8 mA load (5 x 1.6 mA), RL = 560 Ω.
3. Typical data at TA = 25°C, VCC = 5.0 Vdc.
4. D is the effective diameter of the detector image on the plane of the fiber face. The numerical value is the product of the actual
detector diameter and the lens magnification.
5. Measured at the end of 100/140 µm fiber optic cable with large area detector.
6. Propagation delay through the system is the result of several sequentially-occurring phenomena. Consequently it is a combination
of data-rate-limiting effects and of transmission-time effects. Because of this, the data-rate limit of the system must be described in
terms of time differentials between delays imposed on falling and rising edges.
7. As the cable length is increased, the propagation delays increase at 5 ns per meter of length. Data rate, as limited by pulse width
distortion, is not affected by increasing cable length if the optical power level at the receiver is maintained.
Electrical/Optical Characteristics -40°C to + 85°C unless otherwise specified
Fiber sizes with core diameter ≤100 µm and NA ≤0.35, 4.75 V ≤VCC ≤5.25 V
Parameter Symbol Min. Typ.[3] Max. Units Conditions Reference
High Level Output Current IOH 5 250 µAV
O
= 18
PR < -40 dBm
Low Level Output Voltage VOL 0.4 0.5 V IO = 8 mA
PR > -24 dBm
High Level Supply Current ICCH 3.5 6.3 mA VCC = 5.25 V
PR < -40 dBm
Low Level Supply Current ICCL 6.2 10 mA VCC = 5.25 V
PR > -24 dBm
Equivalent N.A. NA 0.50
Optical Port Diameter D 400 µm Note 4
Logic Level HIGH
Logic Level LOW IOL = 8 mA
Data Rate =
5 MBd
CAUTION: The small junction sizes inherent to the design of these components increase the components’
susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be
taken in handling and assembly of these components to prevent damage and/or degradation which may be
induced by ESD.
21
HFBR-24X6 Low-Cost
125 MHz Receiver
Description
The HFBR-24X6 fiber optic
receiver is designed to operate
with the Agilent HFBR-14XX
fiber optic transmitters and 50/
125 µm, 62.5/125 µm, 100/140
µm and 200 µm HCS® fiber optic
cable. Consistent coupling into
the receiver is assured by the
lensed optical system (Figure 1).
Response does not vary with fiber
size for core diameters of 100 µm
or less.
The receiver output is an analog
signal which allows follow-on
circuitry to be optimized for a
variety of distance/data rate
requirements. Low-cost external
components can be used to convert
the analog output to logic
compatible signal levels for various
data formats and data rates up to
175 MBd. This distance/data rate
tradeoff results in increased optical
power budget at lower data rates
which can be used for additional
distance or splices.
The HFBR-24X6 receiver contains
a PIN photodiode and low noise
transimpedance pre-amplifier
integrated circuit. The HFBR-24X6
receives an optical signal and
converts it to an analog voltage.
The output is a buffered emitter-
follower. Because the signal
amplitude from the HFBR-24X6
receiver is much larger than from a
simple PIN photodiode, it is less
susceptible to EMI, especially at
high signaling rates. For very noisy
environments, the conductive or
metal port option is recommended.
A receiver dynamic range of 23 dB
over temperature is achievable
(assuming 10-9 BER).
The frequency response is typically
dc to 125 MHz. Although the
HFBR-24X6 is an analog receiver,
it is compatible with digital
systems. Please refer to
Application Bulletin 78 for simple
and inexpensive circuits that
operate at 155 MBd or higher.
The recommended ac coupled
receiver circuit is shown in Figure
12. It is essential that a 10 ohm
resistor be connected between pin
6 and the power supply, and a 0.1
µF ceramic bypass capacitor be
connected between the power
supply and ground. In addition, pin
6 should be filtered to protect the
Figure 11. Simplified Schematic Diagram.
Housed Product
Unhoused Product
receiver from noisy host systems.
Refer to AN 1038, 1065, or AB 78
for details.
CAUTION: The small junction sizes inherent to the design of these components increase the components’
susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be
taken in handling and assembly of these components to prevent damage and/or degradation which may be
induced by ESD.
PIN FUNCTION
1
2*
3
4*
SIGNAL
VEE
VCC
VEE
BIAS & FILTER
CIRCUITS VCC
VOUT
VEE
6
2
3, 7
POSITIVE
SUPPLY
ANALOG
SIGNAL
NEGATIVE
SUPPLY
5.0
mA
300 pF
PIN NO. 1
INDICATOR
BOTTOM VIEW
6
2
3 & 7
V
CC
ANALOG
SIGNAL
V
EE
PINFUNCTION
1†
2
3*
4†
5†
6
7*
8†
* PINS 3 AND 7 ARE ELECTRICALLY
CONNECTED TO THE HEADER.
† PINS 1, 4, 5, AND 8 ARE ISOLATED FROM
THE INTERNAL CIRCUITRY, BUT ARE
ELECTRICALLY CONNECTED TO EACH OTHER.
N.C.
SIGNAL
V
EE
N.C.
N.C.
V
CC
V
EE
N.C.
1
4
3
28
5
6
7
22
Electrical/Optical Characteristics -40°C to +85°C; 4.75 V ≤Supply Voltage ≤5.25 V,
RLOAD = 511 Ω, Fiber sizes with core diameter ≤100 µm, and N.A. ≤-0.35 unless otherwise specified
Parameter Symbol Min. Typ.[2] Max. Units Conditions Reference
Responsivity RP5.3 7 9.6 mV/µWT
A
= 25°C Note 3, 4
@ 820 nm, 50 MHz Figure 16
4.5 11.5 mV/µW @ 820 nm, 50 MHz
RMS Output Noise VNO 0.40 0.59 mV Bandwidth Filtered Note 5
Voltage @ 75 MHz
PR = 0 µW
0.70 mV Unfiltered Bandwidth Figure 13
PR = 0 µW
Equivalent Input PNBandwidth Filtered
Optical Noise Power @ 75 MHz
(RMS)
Optical Input Power PR-7.6 dBm pk TA = 25°C Figure 14
175 µW pk Note 6
-8.2 dBm pk
150 µW pk
Output Impedance Zo30 ΩTest Frequency =
50 MHz
dc Output Voltage Vo dc -4.2 -3.1 -2.4 V PR = 0 µW
Power Supply Current IEE 915mAR
LOAD = 510 Ω
Equivalent N.A. NA 0.35
Equivalent Diameter D 324 µm Note 7
Absolute Maximum Ratings
Parameter Symbol Min. Max. Units Reference
Storage Temperature TS-55 +85 °C
Operating Temperature TA-40 +85 °C
Lead Soldering Cycle Temp. +260 °C Note 1
Time 10 s
Supply Voltage VCC -0.5 6.0 V
Output Current IO25 mA
Signal Pin Voltage VSIG -0.5 VCC V
(Overdrive)
µW
0.065
0.050
dBm
-41.4
-43.0
CAUTION: The small junction sizes inherent to the design of these components increase the components’
susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be
taken in handling and assembly of these components to prevent damage and/or degradation which may be
induced by ESD.
23
Dynamic Characteristics -40°C to +85°C; 4.75 V ≤Supply Voltage ≤5.25 V; RLOAD = 511 Ω, CLOAD
= 5 pF unless otherwise specified
Parameter Symbol Min. Typ.[2] Max. Units Conditions Reference
Rise/Fall Time tr, tf3.3 6.3 ns PR = 100 µW peak Figure 15
10% to 90%
Pulse Width Distortion PWD 0.4 2.5 ns PR = 150 µW peak Note 8,
Figure 14
Overshoot 2 % PR = 5 µW peak, Note 9
tr = 1.5 ns
Bandwidth (Electrical) BW 125 MHz -3 dB Electrical
Bandwidth - Rise 0.41 Hz • s Note 10
Time Product
Notes:
1. 2.0 mm from where leads enter case.
2. Typical specifications are for operation at TA = 25°C and VCC = +5 V dc.
3. For 200 µm HCS fibers, typical responsivity will be 6 mV/µW. Other parameters will change as well.
4. Pin #2 should be ac coupled to a load ≥510 ohm. Load capacitance must be less than 5 pF.
5. Measured with a 3 pole Bessel filter with a 75 MHz, -3 dB bandwidth. Recommended receiver filters for various bandwidths are
provided in Application Bulletin 78.
6. Overdrive is defined at PWD = 2.5 ns.
7. D is the effective diameter of the detector image on the plane of the fiber face. The numerical value is the product of the actual
detector diameter and the lens magnification.
8. Measured with a 10 ns pulse width, 50% duty cycle, at the 50% amplitude point of the waveform.
9. Percent overshoot is defined as:
VPK - V100%
–––––––––– x 100%
( V100% )
10. The conversion factor for the rise time to bandwidth is 0.41 since the HFBR-24X6 has a second order bandwidth limiting
characteristic.
CAUTION: The small junction sizes inherent to the design of these components increase the components’
susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be
taken in handling and assembly of these components to prevent damage and/or degradation which may be
induced by ESD.
Figure 12. Recommended ac Coupled Receiver Circuit. (See AB 78 and AN 1038 for more information.)
0.1 µF
LOGIC
OUTPUT
+5 V
10 Ω
30 pF
R
LOADS
500 Ω MIN.
6
2
3 & 7
POST
AMP
www.semiconductor.agilent.com
Data subject to change.
Copyright © 2001 Agilent Technologies, Inc.
October 29, 2001
Obsoletes 5980-1065E (8/00)
5988-3624EN
Figure 14. Typical Pulse Width
Distortion vs. Peak Input Power.
Figure 16. Receiver Spectral
Response Normalized to 820 nm.
Figure 15. Typical Rise and Fall
Times vs. Temperature.
Figure 13. Typical Spectral Noise
Density vs. Frequency.
150
0 50 100 150 200 250
FREQUENCY – MH
Z
125
100
75
50
25
0300
SPECTRAL NOISE DENSITY – nV/ H
Z
3.0
02030405070
P
R
– INPUT OPTICAL POWER – µW
2.5
2.0
1.5
1.0
0.5
080
PWD – PULSE WIDTH DISTORTION – ns
10 60
6.0
-60 -40 -20 0 20 40
TEMPERATURE – °C
5.0
4.0
3.0
2.0
1.0 60
t
r
, t
f
– RESPONSE TIME – ns
80 100
t
f
t
r
1.25
400 480 560 640 720 800
λ – WAVELENGTH – nm
1.00
0.75
0880
NORMALIZED RESPONSE
0.50
0.25
960 1040
