HFBR-0507 Series
HFBR-15X7 Transmitters
HFBR-25X6 Receivers
125 Megabaud Versatile Link
The Versatile Fiber Optic Connection
Data Sheet
Description
The 125 MBd Versatile Link (HFBR-0507 Series) is the most
cost-e ective ber-optic solution for transmission of
125 MBd data over 100 meters. The data link consists of
a 650 nm LED transmitter, HFBR-15X7, and a PIN/preamp
receiver, HFBR-25X6. These can be used with low-cost
plastic or silica ber. One mm diameter plastic ber
provides the lowest cost solution for distances under 25
meters. The lower attenuation of silica ber allows data
transmission over longer distance, for a small di erence in
cost. These components can be used for high speed data
links without the problems common with copper wire
solutions, at a competitive cost.
The HFBR-15X7 transmitter is a high power 650 nm LED in
a low cost plastic housing designed to e ciently couple
power into 1 mm diameter plastic optical ber and 200
mm Hard Clad Silica (HCS) ber. With the recommended
drive circuit, the LED operates at speeds from 1-125 MBd.
The HFBR-25X6 is a high bandwidth analog receiver con-
taining a PIN photodiode and internal transimpedance
ampli er. With the recommended application circuit for
125 MBd operation, the performance of the complete
data link is speci ed for of 0-25 meters with plastic ber
and 0-100 meters with 200 mm HCS ber. A wide variety
of other digitizing circuits can be combined with the
HFBR-0507 Series to optimize performance and cost at
higher and lower data rates.
Features
Data Transmission at Signal Rates of 1 to 125 MBd over
Distances of 100 Meters
Compatible with Inexpensive, Easily Terminated Plastic
Optical Fiber, and with Large Core Silica Fiber
High Voltage Isolation
Transmitter and Receiver Application Circuit Schematics
and Recommended Board Layouts Available
Interlocking Feature for Single Channel or Duplex
Links, in a Vertical or Horizontal Mount Con guration
Applications
Intra-System Links: Boardto-Board, Rack-to-Rack
Telecommunications Switching Systems
Computer-to-Peripheral Data Links, PC Bus Extension
Industrial Control
Proprietary LANs
Digitized Video
Medical Instruments
Reduction of Lightning and Voltage Transient
Susceptibility
HCS is a registered trademark of Spectran Corporation.
2
HFBR-0507 Series
125 MBd Data Link
Data link operating conditionsand performance are
speci ed for the HFBR-15X7 transmitter and HFBR-25X6
receiver in the recommended applications circuits shown
in Figure 1. This circuit has been optimized for 125 MBd
operation. The Applications Engineering Department in
the Agilent Optical Communication
Division is available to assist in optimizing link perfor-
mance forhigher or lower speed operation.
Recommended Operating Conditions for the Circuits in Figures 1 and 2.
Parameter Symbol Min. Max. Unit Reference
Ambient Temperature TA070°C
Supply Voltage VCC +4.75 +5.25 V
Data Input Voltage – Low VIL VCC-1.89 VCC-1.62 V
Data Input Voltage – High VIH VCC-1.06 VCC-0.70 V
Data Output Load RL45 55 Note 1
Signaling Rate fS1 125 MBd
Duty Cycle D.C. 40 60 % Note 2
Link Performance: 1-125 MBd, BER ≤ 10-9, under recommended operating conditions withrecommended transmit
and receive application circuits.
Parameter Symbol Min.[3] Typ.[4] Max. Unit Condition Reference
Optical Power Budget, 1 m POF OPBPOF 11 16 dB Note 5, 6, 7
Optical Power Margin, 20 m Standard POF OPMPOF,20 3 6 dB Note 5, 6, 7
Link Distance with Standard 1 mm POF 1 20 27 m
Optical Power Margin, 25 m Low Loss POF OPMPOF,25 3 6 dB Note 5, 6, 7
Link Distance with Extra Low Loss 1 mm POF 1 25 32 m
Optical Power Budget, 1 m HCS OPBHCS 7 12 dB Note 5, 6, 7
Optical Power Margin, 100 m HCS OPMHCS,100 3 6 dB Note 5, 6, 7
Link Distance with HCS Cable 1 100 125 m
Notes:
1. If the output of U4C in Figure 1, page 4 is transmitted via coaxial cable, terminate with a 50 resistor to VCC -2 V.
2. Run length limited code with maximum run length of 10 s.
3. Minimum link performance is projected based on the worst case speci cations of the HFBR-15X7 transmitter, HFBR-25X6 receiver, and POF cable,
and the typical performance of other components (e.g. logic gates, transistors, resistors, capacitors, quantizer, HCS cable).
4. Typical performance is at 25° C, 125 MBd, and is measured with typical values of all circuit components.
5. Standard cable is HFBR-RXXYYY plastic optical ber, with a maximum attenuation of 0.24 dB/m at 650 nm and NA = 0.5. Extra low loss cable is
HFBR-EXXYYY plastic optical ber, with a maximum attenuation of 0.19 dB/m at 650 nm and NA = 0.5. HCS cable is HFBR-H/VXXYYY glass optical
ber, with a maximum attenuation of 10 dB/km at 650 nm and NA = 0.37.
6. Optical Power Budget is the di erence between the transmitter output power and the receiver sensitivity, measured after 1 meter of ber. The
minimum OPB is based on the limits of optical component performance over temperature, process, and recommended power supply variation.
7. The Optical Power Margin is the available OPB after including the e ects of attenuation and modal dispersion for the minimum link distance: OPM
= OPB - (attenuation power loss + modal dispersion power penalty). The minimum OPM is the margin available for longterm LED LOP degradation
and additional xed passive losses (such as in-line connectors) in addition to the minimum speci ed distance.
3
Plastic Optical Fiber (1 mm POF) Transmitter Application Circuit: Performance of the HFBR-15X7 transmitter in
the recommended application circuit (Figure 1) for POF; 1-125 MBd, 25° C.
Parameter Symbol Typical Unit Condition Note
Average Optical Power 1 mm POF Pavg -9.7 dBm 50% Duty Cycle Note 1, Fig 3
Average Modulated Power 1 mm POF Pmod -11.3 dBm Note 2, Fig 3
Optical Rise Time (10% to 90%) tr2.1 ns 5 MHz
Optical Fall Time (90% to 10%) tf2.8 ns 5 MHz
High Level LED Current (On) IF,H 19 mA Note 3
Low Level LED Current (O ) IF,L 3 mA Note 3
Optical Overshoot – 1 mm POF 45 %
Transmitter Application Circuit Current
Consumption – 1 mm POF
ICC 110 mA Figure 1
Hard Clad Silica Fiber (200 m HCS) Transmitter Application Circuit: Performance ofthe HFBR-15X7 transmitter in
the recommended application circuit (Figure 1) for HCS; 1-125 MBd, 25° C.
Parameter Symbol Typical Unit Condition Note
Average Optical Power 200 m HCS Pavg -14.6 dBm 50% Duty Cycle Note 1, Fig 3
Average Modulated Power 200 m HCS Pmod -16.2 dBm Note 2, Fig 3
Optical Rise Time (10% to 90%) tr3.1 ns 5 MHz
Optical Fall Time (90% to 10%) tf3.4 ns 5 MHz
High Level LED Current (On) IF,H 60 mA Note 3
Low Level LED Current (O ) IF,L 6 mA Note 3
Optical Overshoot – 200 m HCS 30 %
Transmitter Application Circuit Current
Consumption – 200 m HCS
ICC 130 mA
Notes:
1. Average optical power is measured with an average power meter at 50% duty cycle, after 1 meter of ber.
2. To allow the LED to switch at high speeds, the recommended drive circuit modulates LED light output between two non-zero powerlevels. The
modulated (useful) power is the di erence between the high and low level of light output power (transmitted) or inputpower (received), which
can be measured with an average power meter as a function of duty cycle (see Figure 3). Average ModulatedPower is de ned as one half the slope
of the average power versus duty cycle:
[Pavg @ 80% duty cycle – Pavg @ 20% duty cycle]
Average Modulated Power =
(2) [0.80 – 0.20]
3. High and low level LED currents refer to the current through the HFBR-15X7 LED. The low level LED “o ” current, sometimesreferred to as “hold-on”
current, is prebias supplied to the LED during the o state to facilitate fast switching speeds.
4
C1
0.001
C2
0.1
R5
22
Q1
BFQ52
R6
91
R7
91
Q2
BFQ52
C20
10 C19
0.1
T
X
V
EE
9
8
7
6
5
4
3
2
1
J1
Q2 BASE
Q1 BASE
T
X
V
CC
R
X
V
CC
PIN 19 10H116
PIN 18 10H116
R
X
V
EE
NC
L1
CB70-1812
1
23
4
5
13
12
10
9
14
7
8
11
6
1
2
3
4
8
5
8
5
1
2
3
4
12
13
5
7
8
9
3
4
17
15
19
18
R24
1K
R22
1K
R18
51
R16
51
C17
0.1
V
BB
V
CC
C10
0.1
R19
51
R17
51
R15
1K
R23
1K
V
BB
C18
0.1
R25
1K R20
12
R21
62
V
CC
V
BB
3 V
C14
10
TL431
U5
MC10H116FN
C15
0.1
C11
0.1
C16
0.1 C12
0.1
R14
1K
V
BB
3V
C9
.47
R12
4.7
C13
0.1
HFBR-25X6
R13
4.7
U4C U4A U4B U3
R11*
R10
15
C8*
74ACTQ00
U1B
74ACTQ00
U1D
74ACTQ00
U1C
R9*
R8*
HFBR-15X7
C7
0.001
C6
0.1
C5
10
C4
0.001
C3
0.1
Q3
2N3904
V
CC
74ACTQ00
U1A
POF
300
300
1K
43 pF
R8
R9
R11
C8
HCS
82
82
470
120 pF
TOLERANCE
1%
1%
1%
1%
THE VALUES OF R8, R9, R11, AND
C8 ARE DIFFERENT FOR POF AND
HCS DRIVE CIRCUITS.
ALL CAPACITOR VALUES
ARE IN MICRO FARADS,
WITH 10% TOLERANCE
(UNLESS OTHERWISE NOTED).
ALL RESISTANCES ARE IN
OHMS WITH 5% TOLERANCE
(UNLESS OTHERWISE NOTED).
U2
MC10H116FN MC10H116FN
2
20
+
+
+
10 14
Plastic and Hard Clad Silica Optical Fiber Receiver Application Circuit:Performance[4] of the HFBR-25X6 receiver in
the recommended application circuit (Figure 1); 1-125 MBd, 25° C unless otherwise stated.
Parameter Symbol Typical Unit Condition Note
Data Output Voltage – Low VOL VCC-1.7 V RL = 50 Note 5
Data Output Voltage – High VOH VCC-0.9 V RL = 50 Note 5
Receiver Sensitivity to Average Modulated Optical
Power 1 mm POF
Pmin -27.5 dBm 50% eye opening Note 2
Receiver Sensitivity to Average Modulated Optical
Power 200 m HCS
Pmin -28.5 dBm 50% eye opening Note 2
Receiver Overdrive Level of Average Modulated
Optical Power 1 mm POF
Pmax -7.5 dBm 50% eye opening Note 2
Receiver Overdrive Level of Average Modulated
Optical Power 200 m HCS
Pmax -10.5 dBm 50% eye opening Note 2
Receiver Application Circuit Current Consumption ICC 85 mA RL = ∞ Figure 1
Notes:
4. Performance in response to a signal from the HFBR-15X7 transmitter driven with the recommended circuit at 1-125 MBd over 1 meter of HFBR-R/
EXXYYY plastic optical ber or 1 meter of HFBR-H/VXXYYY hard clad silica optical ber.
5. Terminated through a 50 resistor to VCC -2 V.
6. If there is no input optical power to the receiver, electrical noise can result in false triggering of the receiver. In typical applications, data encoding
and error detection prevent random triggering from being interpreted as valid data. Refer to Applications Note 1066 for design guidelines.
Figure 1. Transmitter and Receiver Application Circuit with +5 V ECL Inputs and Outputs.
5
Figure 2. Recommended Power Supply Filter and +5 V ECL Signal Terminations for the Transmitter and Receiver Application Circuit of Figure 1.
Figure 3. Average Modulated Power. Figure 4. Typical Optical Power Budget vs. Data Rate.
8 TD
9 T
X
V
EE
7 TD
6 T
X
V
CC
5 R
X
V
CC
4
3 RD
2 RD
82 :
10 μF 0.1 μF
4.7 μH
0.1 μF
1 R
X
V
EE
+5 V ECL
SERIAL DATA
SOURCE
0.1 μF
0.1 μF
82 :
120 :120 :
+5 V ECL
SERIAL DATA
RECEIVER
4.7 μH
10 μF
+
+
+
–
5 V
82 :
82 :
120 :120 :
FIBER-OPTIC
TRANSCEIVER
SHOWN IN
FIGURE 1
4.7 μH
AVERAGE POWER – μW
0
200
100
0
DUTY CYCLE – %
20 40 80 100
150
50
60
AVERAGE POWER,
50% DUTY CYCLE
AVERAGE
MODULATED
POWER
OPTICAL POWER BUDGET –dB
10
21
15
9
DATA RATE – MBd
9070 130 150
19
11
110
17
13
30 50
POF
HCS
6
CAUTION: The small junction sizes inherent to the design of this component increase the component's susceptibility
to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling
and assembly of this component to prevent damage and/or degradation which may be induced by ESD.
WARNING: WHEN VIEWED UNDER SOME CONDITIONS, THE OPTICAL PORT MAYEXPOSE THE EYE BEYOND THE MAXIMUM
PERMISSIBLE EXPOSURE RECOMMENDEDIN ANSI Z136.2, 1993. UNDER MOST VIEWING CONDITIONS THERE IS NO EYE HAZARD.
ANODE 1
CATHODE 2
GROUND 3
GROUND 4
GROUND
GROUND
SEE NOTE 6
125 Megabaud Versatile Link Transmitter
HFBR-15X7 Series
Description
The HFBR-15X7 transmitters incorporate a 650 nanometer
LED in a horizontal (HFBR-1527) or vertical (HFBR-1537)
gray housing. The HFBR-15X7 transmitters are suitable
for use with current peaking to decrease response time
and can be used with HFBR-25X6 receivers in data links
operating at signal rates from 1 to 125 megabaud over
1 mm diameter plastic optical ber or 200 m diameter
hard clad silica glass optical ber. Refer to Application
Note 1066 for details for recommended interface circuits.
Absolute Maximum Ratings
Parameter Symbol Min. Max. Unit Reference
Storage Temperature TS-40 85 °C
Operating Temperature TO-40 70 °C
Lead Soldering Temperature
Cycle Time
260 °C Note 1
10 s
Transmitter High Level Forward Input Current IF,H 120 mA 50% Duty Cycle ≥ 1 MHz
Transmitter Average Forward Input Current IF,AV 60 mA
Reverse Input Voltage VR3V
7
Electrical/Optical Characteristics 0 to 70° C, unless otherwise stated.
Parameter Symbol Min. Typ.[2] Max. Unit Condition Note
Transmitter Output Optical Power,
1 mm POF
PT-9.5
-10.4
-7.0 -4.8
-4.3
dBm IF,dc = 20 mA, 25° C
0-70° C
Note 3
Transmitter Output Optical Power,
1 mm POF
PT-6.0
-6.9
-3.0 -0.5
-0.0
dBm IF,dc = 60 mA, 25° C
0-70° C
Note 3
Transmitter Output Optical Power,
200 m HCS
PT-14.6
-15.5
-13.0 -10.5
-10.0
dBm IF,dc = 60 mA, 25° C
0-70° C
Note 3
Output Optical Power Temperature
Coe cient
PT
T
-0.02 dB/°C
Peak Emission Wavelength PK 640 650 660 nm
Peak Wavelength Temperature
Coe cient
T
0.12 nm/°C
Spectral Width FWHM 21 nm Full Width,
Half Maximum
Forward Voltage VF1.8 2.1 2.4 V IF = 60 mA
Forward Voltage Temperature
Coe cient
VF
T
-1.8 mV/°C
Transmitter Numerical Aperture NA 0.5
Thermal Resistance, Junction to Case jc 140 °C/W Note 4
Reverse Input Breakdown Voltage VBR 3.0 13 V IF,dc = -10 A
Diode Capacitance CO60 pF VF = 0 V, f = 1 MHz
Unpeaked Optical Rise Time, 10% - 90% tr12 ns IF = 60 mA,
f = 100 kHz
Figure 1
Note 5
Unpeaked Optical Fall Time, 90% - 10% tf9nsI
F = 60 mA,
f = 100 kHz
Figure 1
Note 5
Notes:
1. 1.6 mm below seating plane.
2. Typical data is at 25° C.
3. Optical Power measured at the end of 0.5 meter of 1 mm diameter plastic or 200 m diameter hard clad silica optical ber with a large area
detector.
4. Typical value measured from junction to PC board solder joint for horizontal mount package, HFBR-1527. jc is approximately 30°C/W higher for
vertical mount package, HFBR-1537.
5. Optical rise and fall times can be reduced with the appropriate driver circuit; refer to Application Note 1066.
6. Pins 5 and 8 are primarily for mounting and retaining purposes, but are electrically connected; pins 3 and 4 are electrically unconnected. It is
recommended that pins 3, 4, 5, and 8 all be connected to ground to reduce coupling of electrical noise.
7. Refer to the Versatile Link Family Fiber Optic Cable and Connectors Technical Data Sheet for cable connector options for 1 mm plastic optical ber
and 200 m HCS ber.
8. The LED current peaking necessary for high frequency circuit design contributes to electromagnetic interference (EMI). Care must be taken in
circuit board layout to minimize emissions for compliance with governmental EMI emissions regulations. Refer to Application Note 1066 for design
guidelines.
8
Figure 5. Test Circuit for Measuring Unpeaked Rise and Fall Times. Figure 6. Typical Spectra Normalizedto the 25° C Peak.
Figure 7. Typical Forward Voltage vs. Drive Current. Figure 8. Typical Normalized Output Optical Power vs. Drive Current.
HP8082A
PULSE
GENERATOR
50 OHM
LOAD
RESISTOR
HP54002A
50 OHM BNC
INPUT POD
HP54100A
OSCILLOSCOPE
BCP MODEL 300
500 MHz
BANDWIDTH
SILICON
AVALANCHE
PHOTODIODE
NORMALIZED SPECTRAL OUTPUT POWER
620
1.2
0.6
0
WAVELENGTH (nm)
630 650 670 680
1.0
0.2
660
70° C
0.8
0.4
640
25° C
0° C
V
F
– FORWARD VOLTAGE – V
1
2.4
2.0
1.6
I
F,DC
– TRANSMITTER DRIVE CURRENT (mA)
10 100
1.8
70° C
2.2 25° C
0° C
P
T
– NORMALIZED OUTPUT POWER – dB
1
0
-15
-25
I
F,DC
– TRANSMITTER DRIVE CURRENT (mA)
10 100
-20 70° C
-5
0° C
-10
25° C
9
CAUTION: The small junction sizes inherent to the design of this component increase the component's susceptibility
to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling
and assembly of this component to prevent damage and/or degradation which may be induced by ESD.
125 Megabaud Versatile Link Receiver
HFBR-25X6 Series
Description
The HFBR-25X6 receivers contain a PIN photodiode and
transimpedance pre-ampli er circuit in a horizontal
(HFBR-2526) or vertical (HFBR-2536) blue housing, and
are designed to interface to 1 mm diameter plastic optical
ber or 200 m hard clad silica glass optical ber. The
receivers convert a received optical signal to an analog
output voltage. Follow-on circuitry can optimize link per-
formance for a variety of distance and data rate require-
ments. Electrical bandwidth greater than 65 MHz allows
design of high speed data links with plastic or hard clad
silica optical ber. Refer toApplication Note 1066 for
details for recommended interface circuits.
Absolute Maximum Ratings
Parameter Symbol Min. Max. Unit Reference
Storage Temperature TS-40 +75 °C
Operating Temperature TO0 +70 °C
Lead Soldering Temperature
Cycle Time
260 °C Note 1
10 s
Signal Pin Voltage VO-0.5 VCC V
Supply Voltage VCC -0.5 6.0 V
Output Current IO25 mA
1
2
GROUND
3
4
GROUND
GROUND
SEE NOTES 2, 4, 9
GROUND
SIGNAL
V
CC
10
Electrical/Optical Characteristics 0 to 70° C; 5.25 V ≥ VCC ≥ 4.75 V; power supply must be ltered (see Figure 1, Note 2).
Parameter Symbol Min. Typ. Max. Unit Test Condition Note
AC Responsivity 1 mm POF RP,APF 1.7 3.9 6.5 mV/W650 nm Note 4
AC Responsivity 200 m HCS RP,HCS 4.5 7.9 11.5 mV/W
RMS Output Noise VNO 0.46 0.69 mVRMS Note 5
Equivalent Optical Noise Input Power,
RMS – 1 mm POF
PN,RMS - 39 -36 dBm Note 5
Equivalent Optical Noise Input Power,
RMS – 200 m HCS
PN,RMS -42 -40 dBm Note 5
Peak Input Optical Power – 1 mm POF PR-5.8
-6.4
dBm
dBm
5 ns PWD
2 ns PWD
Note 6
Peak Input Optical Power – 200 m HCS PR-8.8
-9.4
dBm
dBm
5 ns PWD
2 ns PWD
Note 6
Output Impedance ZO30 50 MHz Note 4
DC Output Voltage VO0.8 1.8 2.6 V PR = 0 W
Supply Current ICC 915mA
Electrical Bandwidth BWE65 125 MHz -3 dB electrical
Bandwidth * Rise Time 0.41 Hz * s
Electrical Rise Time, 10-90% tr3.3 6.3 ns PR = -10 dBm peak
Electrical Fall Time, 90-10% tf3.3 6.3 ns PR = -10 dBm peak
Pulse Width Distortion PWD 0.4 1.0 ns PR = -10 dBm peak Note 7
Overshoot 4 % PR = -10 dBm peak Note 8
Notes:
1. 1.6 mm below seating plane.
2. The signal output is an emitter follower, which does not reject noise in the power supply. The power supply must be ltered as in Figure 1.
3. Typical data are at 25° C and VCC = +5 Vdc.
4. Pin 1 should be AC coupled to a load ≥ 510 with load capacitance less than 5 pF.
5. Measured with a 3 pole Bessel lter with a 75 MHz, -3 dB bandwidth.
6. The maximum Peak Input Optical Power is the level at which the Pulse Width Distortion is guaranteed to be less than the PWD listed under Test
Condition. PR,Max is given for PWD = 5 ns for designing links at ≤ 50 MBd operation, and also for PWD = 2 ns for designing links up to 125 MBd (for
both POF and HCS input conditions).
7. 10 ns pulse width, 50% duty cycle, at the 50% amplitude point of the waveform.
8. Percent overshoot is de ned at: (VPK - V100%)
× 100%
V
100%
9. Pins 5 and 8 are primarily for mounting and retaining purposes, but are electrically connected. It is recommended that these pins be connected to
ground to reduce coupling of electrical noise.
10. If there is no input optical power to the receiver (no transmitted signal) electrical noise can result in false triggering of the receiver. In typical
applications, data encoding and error detection prevent random triggering from being interpreted as valid data. Refer to Application Note 1066
for design guidelines.
11
Figure 9. Recommended Power Supply Filter Circuit.
Figure 10. Simpli ed Receiver Schematic.
Figure 11. Typical Pulse Width Distortion vs. Peak Input Power. Figure 12. Typical Output Spectral Noise Density vs. Frequency.
Figure 13. Typical Rise and Fall Time vs. Temperature.
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 © 2005-2012 Avago Technologies. All rights reserved. Obsoletes 5965-6114E
AV02-3589EN - June 11, 2012
Versatile Link Mechanical Dimensions
Versatile Link Printed Circuit Board Layout Dimensions
