Fiber Optic Transmitters and
Receivers for SERCOS, PROFIBUS
and INTERBUS-S Applications HFBR-1505A/2505A
(SMA Tx/Rx for SERCOS)
HFBR-1515B/2515B
(ST® Tx/Rx for PROFIBUS)
HFBR-1505C/2505C
(SMA Tx/Rx for INTERBUS-S)
Technical Data
Features
• Meets Industrial SERCOS,
PROFIBUS, and INTERBUS-S
Standard
• SMA and ST® Ports
• 650 nm Wavelength
Technology
• Specified for Use with 1 mm
Plastic Optical Fiber and 200
µm Hard Clad Silica
• Auto-Insertable and Wave
Solderable
• DC – 10 MBd Data Rate
Applications
• Industrial Control Data
Links
• Factory Automation Data
Links
• Voltage Isolation
Applications
• PLCs
• Motor Drives
• Sensor, Meter and Actuator
Interfaces
Description
SERCOS
SERCOS, an acronym for SErial
Realtime COmmunications
System, is a standard digital
interface for communication in
industrial CNC applications.
SERCOS is a European
(EN 61491) and international
standard (IEC 61491). The
optical interface allows data rates
of 2, 4, 8, and 16 MBd and data
transfer between numerical
controls and drives via fiber-optic
rings, with voltage isolation and
noise immunity. The HFBR-
1505A and HFBR-2505A
products comply with SERCOS
specifications for optical
characteristics and connector
style, and have guaranteed
performance up to 10 MBd.
(Typically the 16 MBd required
by SERCOS is possible as well
but please contact Agilent
regarding the plan for the
16 MBd device.)
PROFIBUS
PROFIBUS, an acronym of
PROcess FIeld BUS, is an open
fieldbus standard defined for data
rates ranging from 9.6 kBd to
12 MBd in selectable steps for
wire and optical fiber. PROFIBUS
is a German national DIN 19245
standard and a European
CENELEC standard EN 50170.
The ST® connector is the
recommended optical port of the
PROFIBUS optical fiber version
but other connectors are allowed
as well. The HFBR-1515B and
HFBR-2515B comply fully to the
technical guideline using Plastic
Optical Fiber up to 6 MBd, and
have a guaranteed performance at
data rates up to 10 MBd.
(Typically the 12 MBd is possible
as well, but please contact Agilent
regarding the plan for the 12 MBd
device.)
INTERBUS-S
INTERBUS-S, a special open
Sensor/Actuator Bus, is finding a
broad acceptance in the factory
automation industry. The HFBR-
1505C and HFBR-2505C were
specially designed for this
application and can be used with
1 mm POF and 200 µm HCS fiber
at the specified data rates of
500 kBd and 2 MBd. The optical
transmission guideline is a
supplement of the German
National DIN E 19258 standard
draft. On the European level,
ST® is a registered trademark of AT&T.
HCS® is a registered trademark of
SpecTran Corporation.
2
Specified Link Performance
0˚C to +70˚C unless otherwise noted.
Parameter Symbol Min. Max. Unit Condition Reference
Link Distance with 1 0.1 40 m POF Notes 1,2,3,4,6
HFBR-1505A/2505A or 0.1 200 m HCS®Notes 1,2,3,5,6
HFBR-1515B/2515B
Link Distance with 1 0.1 50 m POF Notes 1,2,3,4,7
HFBR-1505C/2505C 0.1 400 m HCS®Notes 1,2,3,5,7
Pulse Width Distortion PWD –30 +30 ns 25% to 75% Note 1
with HFBR-1505A/2505A duty cycle
or HFBR-1515B/2515B
Pulse Width Distortion PWD –125 +125 ns arbitrary duty cycle Note 1
with HFBR-1505C/2505C
prEN 50254 is the draft of the
INTERBUS-S fieldbus.
Package Information
All HFBR-X5X5X series
transmitters and receivers are
housed in a low-cost, dual-in-line
package that is made of high
strength, heat resistant,
chemically resistant and UL 94
V-O (UL file # E121562) flame
retardant plastic. The
transmitters are easily identified
by the light grey colored
connector port. The receivers are
easily identified by the dark grey
colored connector port. The
package is designed for auto-
insertion and wave soldering so it
is ideal for high volume
production applications.
Handling and Design
Information
When soldering, it is advisable to
leave the protective 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 X5X5X
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.
CAUTION: The small junction size inherent in the design of these components increases 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.
Notes:
1. With recommended Tx and Rx circuits (60 mA nominal drive current).
2. POF HFBR-Exxyyy 0.23 dB/m worst case attentuation.
3. HCS® 10 dB/km worst case attenuation.
4. Including a 3 dB optical safety margin accounting for link service lifetime.
5. Including a 2 dB optical safety margin accounting for link service lifetime.
6. Signaling rate DC to 10 MBd.
7. Signaling rate DC to 2 MBd.
3
Absolute Maximum Ratings
Parameter Symbol Min. Max. Unit Reference
Storage and Operating Temperature TS,O –40 85 ˚C
Peak Forward Input Current IF,PK 90 mA Note 6
Average Forward Input Current IF,AVG 60 mA
Reverse Input Voltage VR3V
Lead Soldering Cycle Temp TSOL 260 ˚C Note 7
Time 10 s
HFBR-15X5X
Transmitters
The HFBR-15X5X transmitter
incorporates a 650 nm LED in a
light gray nonconductive plastic
housing. The high light output
power enables the use of both
PIN FUNCTION
1
4
5
6
7
8
CONNECTED TO PIN 4
CONNECTED TO PIN 1
GND
GND
CATHODE
ANODE
Electrical/Optical Characteristics
0˚C to +70˚C unless otherwise noted.
Parameter Symbol Min. Typ.[1] Max. Unit Condition Ref.
Optical Power ∆PT/∆T –0.02 dB/˚C
Temperature
Coefficient
Forward Voltage VF1.8 2.1 2.65 V IF, dc = 60 mA Fig. 1
Forward Voltage ∆VF/∆T –1.8 mV/˚C Fig. 1
Temperature
Coefficient
Breakdown Voltage VBR 3.0 13 V IF, dc = –10 µA
Peak Emission λPK 640 650 660 nm Fig. 3
Wavelength
Full Width Half Max FWHM 21 30 nm Fig. 3
Diode Capacitance CO60 pF VF = 0 V, f = 1 MHz
Thermal Resistance θJC 140 ˚C/W Notes 4,5
Rise Time (10% to 90%) tr13 ns 10% to 90%,
Fall Time (90% to 10%) tf10 ns IF = 60 mA
plastic optical fiber (POF) and
Hard Clad Silica (HCS®). This
transmitter can be operated up to
10 MBd using a simple driver
circuit. The HFBR-1505X is
compatible with SMA connectors,
while the HFBR-1515X mates
with ST® connectors.
5
6
7
8
4
1
BOTTOM VIEW,
HFBR-15x5x
SEE NOTE 10
EYE SAFETY: The HFBR-15x5x is a Class 1 LED Product and eye safe when used within the data
sheet limits and under normal operating conditions. This includes all reasonably foreseeable
single fault conditions per IEC60825-1 and amendments.
4
Peak Output Power
0˚C to +70˚C unless otherwise noted.
Model Number Symbol Min. Max. Unit Condition Reference
HFBR-1505A PT–10.5 –5.5 dBm POF, IF, dc = 35 mA Notes 2,3,11
SERCOS –7.5 –3.5 POF, IF, dc = 60 mA Figure 2
–18.0 –10 HCS®, IF, dc = 60 mA
HFBR-1515B –10.5 –5.5 POF, IF, dc = 35 mA Notes 2,3,11
PROFIBUS –7.5 –3.5 POF, IF, dc = 60 mA Figure 2
–18.0 –8.5 HCS®, IF, dc = 60 mA
HFBR-1505C –6.2 0.0 POF, IF, dc = 60 mA Notes 3,8,9
INTERBUS-S –16.9 –8.5 HCS®, IF, dc = 60 mA Figure 2
Notes:
1. Typical data at 25˚C.
2. Optical power measured at the end of 0.5 meters of 1 mm diameter plastic optical fiber with a large area detector.
3. Minimum and maximum values for PT over temperature are based on a fixed drive current. The recommended drive circuit has
temperature compensation which reduces the variation in PT over temperature, refer to Figures 4 and 6.
4. Thermal resistance is measured with the transmitter coupled to a connector assembly and fiber, and mounted on a printed circuit
board.
5. To further reduce the thermal resistance, the cathode trace should be made as large as is consistent with good RF circuit design.
6. For IF,PK > 60 mA, the duty factor must maintain IF,AVG ≤ 60 mA and pulse width ≤ 1 µs.
7. 1.6 mm below seating plane.
8. Minimum peak output power at 25˚C is –5.3 dBm (POF) and –16.0 dBm (HCS®) for 1505C series only.
9. Optical power measured at the end of 1 meter of 1 mm diameter plastic or 200 µm hard clad silica optical fiber with a large area
detector.
10. Pins 1 and 4 are for mounting and retaining purposes, but are electrically connected; pins 5 and 6 are electrically isolated. It is
recommended that pins 1, 4, 5, and 6 all be connected to ground to reduce coupling of electrical noise.
11. Output power with 200 µm hard clad silica optical fiber assumes a typical –10.5 dB difference compared to 1 mm plastic optical
fiber.
Figure 1. Typical Forward Voltage vs.
Drive Current. Figure 2. Typical Normalized Optical
Power vs. Drive Current. Figure 3. Typical Normalized Optical
Spectra.
2.5
1 10 100
IF,DO – TRANSMITTER DRIVE CURRENT – mA
VF – FORWARD VOLTAGE – V
2.3
2.1
1.9
1.7
1.5
-40 °C
0 °C
25 °C
70 °C
85 °C
10
1 10 100
IF,DO – TRANSMITTER DRIVE CURRENT – mA
PT – NORMALIZED OUTPUT POWER – dB
0
-10
-20
-30
-40
-40 °C
25 °C
85 °C
1.4
610 650 690
WAVELENGTH – nm
NORMALIZED SPECTRAL OUTPUT POWER
1.2
0.8
0.4
0.2
0
-40 °C
0 °C
630 670
0.6
1.0 25 °C
70 °C
85 °C
5
Figure 4. Typical Normalized Optical
Power vs. Temperature (in
Recommended Drive Circuit).
Figure 5. Typical Optical Pulse Width
Distortion vs. Temperature and
Power Supply Voltage (in
Recommended Drive Circuit).
1.2
-40 -20 0 20 40 60 80
TEMPERATURE – °C
NORMALIZED OUTPUT POWER
1.1
1.0
0.9
0.8
0.7
V
CC
= 5.0 V
V
CC
= 5.25 V
V
CC
= 4.75 V
2
-40 -20 0 20 40 60 80
TEMPERATURE – °C
PWD – ns
1
-1
-2
-4
-5
V
CC
= 5.0 V
V
CC
= 4.75 V
-3
0V
CC
= 5.25 V
Recommended Drive Circuit for HFBR-x505A/x515B
Figure 6. Recommended Transmitter and Receiver Drive Circuit (IF, on = 35 mA or 60 mA Nominal at TA = 25˚C).
8
7
6
5
1
4
U2
HFBR-15X5 5
6
7
8
4
1
U3
HFBR-25X5
R2
2.7
C4
0.1 µF
+5 V V
CC
0 V
TTL OUTPUT
8
2
1
3
4
+5 V V
CC
0 V
TTL INPUT
R1
C1
10 µF
C2
0.1 µF
U1
DS75451
TTL COMPATIBLE TRANSMITTER TTL COMPATIBLE RECEIVER
R1 I
F
82.5 Ω35 mA
47 Ω60 mA
+
6
Absolute Maximum Ratings
Parameter Symbol Min. Max. Unit Reference
Storage and Operating Temperature TS–40 85 ˚C
Supply Voltage VCC –0.5 +5.5 V
Average Output Current IO,AVG –16 +16 mA
Output Power Dissipation POD 80 mW
Lead Soldering Cycle Temp 260 ˚C Note 2
Time 10 s
HFBR-25x5A/B Receivers
The HFBR-25x5A/B receiver
consists of a silicon PIN
photodiode and digitizing IC to
produce a logic compatible
output. The IC includes a unique
circuit to correct the pulse width
distortion of the first bit after a
long idle period. This enables
operation from DC to 10 MBd
Electrical/Optical Characteristics
0˚C to +70˚C, 4.75 V < VCC < 5.25 V, VP–P Noise ≤100 mV unless otherwise noted.
Parameter Symbol Min. Typ.[1] Max. Unit Condition Ref.
Peak Input Power PRH –42 dBm 1mm POF Notes 3,5
Level Logic HIGH –44 200 µm HCS®
Peak Input Power PRL –20 –0 dBm 1 mm POF, Note 3
Level Logic LOW –22 –2 200 µm HCS®Figs. 7,8,
|PWD| < 30 ns 9,10
Supply Current ICC 27 45 mA VO = Open
High Level Output VOH 4.2 4.7 V IO = –40 µA
Voltage
Low Level Output VOH 0.22 0.4 V IO = +1.6 mA
Voltage
Output Rise Time tr12 30 ns CL = 10 pF Note 3
Output Fall Time tf10 30 ns CL = 10 pF Note 3
Notes:
1. Typical data are at 25˚C, VCC = 5.0 V.
2. 1.6 mm below seating plane.
3. In recommended receiver circuit, with an optical signal from the recommended transmitter circuit.
4. Pins 1 and 4 are electrically connected to the conductive housing and are also used for mounting and retaining purposes. It is
required that pin 1 and 4 be connected to ground to maintain conductive housing shield effectiveness.
5. BER ≤10E-9, includes a 10.8 dB margin below the receiver switching threshold level (signal to noise ratio = 12).
with low PWD for arbitrary data
patterns. The receiver output is a
“push–pull” stage compatible with
TTL and CMOS logic. The
receiver housing is a dark grey,
conductive plastic. The
HFBR-2505A is compatible with
SMA connectors, while the
HFBR-2515B mates with ST®
connectors.
5
6
7
8
4
1
BOTTOM VIEW,
HFBR 25x5A/B
SEE NOTE 4
PIN FUNCTION
1
4
5
6
7
8
CONNECTED TO PIN 4
CONNECTED TO PIN 1
NO CONNECT
V
CC
GND
V
O
7
Figure 7. Typical POF Receiver
Overdrive PRL,max at 10 MBd vs.
Temperature and Power Supply Voltage.
Figure 8. Typical POF Receiver Pulse Width
Distortion vs. Optical Power at 10 MBd.
Figure 9. Typical POF Receiver Pulse Width
Distortion vs. Power Supply Voltage at High
Optical Power, (0 dBm, 10 MBd).
6
-40 -20 0 20 40 60 100
TEMPERATURE – °C
RECEIVED POWER – dBm
5
4
3
1
0
V
CC
= 5.0 V
V
CC
= 5.25 V
V
CC
= 4.75 V
2
80
30
-22 -18 -14 -10 -5 2
P
PL
– RECEIVER OPTICAL INPUT POWER – dBm
RECEIVED PWD – ns
20
10
0
-20
-30
-10
-2
Figure 10. Typical POF Receiver Pulse Width
Distortion vs. Power Supply Voltage at Low
Optical Power, (-21 dBm, 10 MBd).
-13
4.7 4.9 5.0 5.1 5.3 5.5
V
CC
– VOLTS
PWD – ns
-14
-15
-17
-18
-16
5.4
4.8 5.2
16
4.7 4.9 5.0 5.1 5.3 5.5
V
CC
– VOLTS
PWD – ns
15
14
13
10
9
12
5.4
11
4.8 5.2
8
5
6
7
8
4
1
BOTTOM VIEW,
HFBR 2505C
SEE NOTE 3
Absolute Maximum Ratings
Parameter Symbol Min. Max. Units Reference
Storage & Operating Temperatures TS, O –40 +85 °C
Lead Soldering Cycle Temp. 260 °C Note 1
Time 10 sec
Supply Voltage VCC –0.5 7 V Note 2
Output Collector Current IOAV 25 mA
Output Collector Power Dissipation POD 40 mW
Output Voltage VO–0.5 18 V
Pull-up Voltage VP–5 VCC V
Fan Out (TTL) N 5
Notes:
1. 1.6 mm below seating plane.
2. It is essential that a bypass capacitor 0.1 µF be connected from pin 6 to pin 7 of the receiver. Total lead length between both ends
of the capacitor and the pins should not exceed 20 mm.
3. Pins 1 and 4 are electrically connected to the conductive housing and are also used for mounting and retaining purposes. It is
required that pin 1 and 4 be connected to ground to maintain conductive housing shield effectiveness.
HFBR-2505C Receiver
The HFBR-2505C receiver
includes a monolithic DC
coupled, digital IC receiver with
open collector Schottky output
transistor. An internal pullup
resistor to VCC is available at
PIN FUNCTION
1
4
5
6
7
8
CONNECTED TO PIN 4
CONNECTED TO PIN 1
R
L
V
CC
GND
V
O
pin 5. The receiver housing is a
dark gray conductive plastic and
the optical port is compatible
with SMA connectors. The speci-
fied signal rate of HFBR-2505C
is 2 MBd.
9
Receiver Electrical/Optical Characteristics
0°C to 70°C, 4.75 V ≤VCC ≤5.25 V unless otherwise specified
Parameter Symbol Min. Typ. Max. Units Conditions Ref.
Input Optical Power PR(L) –21.6 –2.0 dBm VOL = 0.5 V Notes 1,
Level for Logic “0” IOL = 8 mA 2
1 mm POF
–23.0 VOL = 0.5 V
IOL = 8 mA
200 µm HCS
Input Optical Power PR(H) –43 dBm VOL = 5.25 V Note 1
Level for Logic “1” IOH ≤250 µA
High Level Output Current IOH 5 250 µAV
O
= 18 V, PR = 0 Note 3
Low Level Output Current VOL 0.4 0.5 V IOL = 8 mA, Note 3
PR = PR(L)MIN
High Level Supply ICCH 3.5 6.3 mA VCC = 5.25 V, Note 3
Current PR = 0
Low Level Supply Current ICCL 6.2 10 mA VCC = 5.25 V Note 3
PR = -12.5 dBm
Effective Diameter D 1 mm
Numerical Aperture NA 0.5
Internal Pull-up Resistor RL680 1000 1700 Ω
Notes:
1. Optical flux, P (dBm) = 10 Log [P (µW)/1000 µW].
2. Measured at the end of the fiber optic cable with large area detector.
3. RL is open.
8
7
6
5
1
4HFBR-1505C
5
6
7
8
4
1
HFBR-2505C
C4
0.1 µF
+5 V V
CC
0 V
TTL OUTPUT
8
2
1
3
4
+5 V V
CC
0 V
TTL INPUT
R1
C1
10 µF
C2
0.1 µF
U1
DS75451
TTL COMPATIBLE TRANSMITTER TTL COMPATIBLE RECEIVER
R1 I
F
82.5 Ω35 mA
47 Ω60 mA
+
R1 = (V
CC
– V
F
)
/
I
F
I
F
V
F
Figure 11. Typical Interface Circuit.
7.0
(0.28)
6.3
(0.25)
5.1
(0.20)
2.5
(0.10)
2.8
(0.11)
1.3
(0.05)
21.2
(0.83)
YYWW
HFBR-XXXX
PART NUMBERDATE
CODE
12.5
(0.49)
3.8
(0.150)
1.3
(0.050)
7.6
(0.30) 4.8
(0.19)
∅1.5
(0.06)
PINS 5, 6, 7, 8 ARE 0.5 (0.020) X 0.25 (0.01)
5
6
7
8
4
1
PINS 1, 4 ARE 0.6 (0.025) DIA.
1.3
(0.05)
1.0
(0.04) 3.6
(0.140)
5
6
7
8
4
1
6.3
(0.25)
3.8
(0.150)
1.3
(0.050)
6.4
(0.250)DIA.
12.5
(0.49)
5.1
(0.20)
2.5
(0.10)
1/4 - 36 UNS 2A THREAD
YYWW
HFBR-XXXX
2.8
(0.11)
PART NUMBERDATE
CODE
16.1
(0.63)
7.6
(0.30)
PINS 5, 6, 7, 8 ARE 0.5 (0.020) X 0.25 (0.01)
PINS 1, 4 ARE 0.6 (0.025) DIA.
1.3
(0.05)
1.0
(0.04) 3.6
(0.140)
Mechanical Dimensions
HFBR-X515X
HFBR-X505X
10
www.agilent.com/semiconductors
For product information and a complete list of
distributors, please go to our web site.
For technical assistance call:
Americas/Canada: +1 (800) 235-0312 or
(408) 654-8675
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Hong Kong: (+65) 271 2451
India, Australia, New Zealand: (+65) 271 2394
Japan: (+81 3) 3335-8152(Domestic/Interna-
tional), or 0120-61-1280(Domestic Only)
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Malaysia, Singapore: (+65) 271 2054
Taiwan: (+65) 271 2654
Data subject to change.
Copyright © 2002 Agilent Technologies, Inc.
Obsoletes 5988-1764EN
February 11, 2002
5988-5299EN