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 Avago 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 to12 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 Avago 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.
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
ST
®
is a registered trademark of AT&T.
HCS
®
is a registered trademark of SpecTran Corporation.
The optical transmission
guideline is a supplement of the
German National DIN E 19258
standard draft. On the European
level, 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, Avago
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.
Specified Link Performance
0˚C to +70˚C unless otherwise noted.
Parameter
Link Distance with
HFBR-1505A/2505A or
HFBR-1515B/2515B
Link Distance with
HFBR-1505C/2505C
Pulse Width Distortion
with HFBR-1505A/2505A
or HFBR-1515B/2515B
Pulse Width Distortion
with HFBR-1505C/2505C
Symbol
1
Min.
0.1
0.1
0.1
0.1
–30
Max.
40
200
50
400
+30
Unit
m
m
m
m
ns
Condition
POF
HCS
®
POF
HCS
®
25% to 75%
duty cycle
arbitrary duty cycle
Reference
Notes 1,2,3,4,6
Notes 1,2,3,5,6
Notes 1,2,3,4,7
Notes 1,2,3,5,7
Note 1
1
PWD
PWD
–125
+125
ns
Note 1
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.
2
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
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.
4
5
6
7
1
8
BOTTOM VIEW,
HFBR-15x5x
SEE NOTE 10
PIN
1
4
5
6
7
8
FUNCTION
CONNECTED TO PIN 4
CONNECTED TO PIN 1
GND
GND
CATHODE
ANODE
Absolute Maximum Ratings
Parameter
Storage and Operating Temperature
Peak Forward Input Current
Average Forward Input Current I
F,AVG
Reverse Input Voltage
Lead Soldering Cycle
Temp
Time
V
R
T
SOL
Symbol
T
S,O
I
F,PK
60
Min.
–40
Max.
85
90
mA
3
260
10
V
˚C
s
Note 7
Unit
˚C
mA
Note 6
Reference
Electrical/Optical Characteristics
0˚C to +70˚C unless otherwise noted.
Parameter
Optical Power
Temperature
Coefficient
Forward Voltage
Forward Voltage
Temperature
Coefficient
Breakdown Voltage
Peak Emission
Wavelength
Full Width Half Max
Diode Capacitance
Thermal Resistance
Rise Time (10% to 90%)
Fall Time (90% to 10%)
Symbol
∆P
T
/∆T
Min.
Typ.
[1]
–0.02
Max.
Unit
dB/˚C
Condition
Ref.
V
F
∆V
F
/∆T
1.8
2.1
–1.8
2.65
V
mV/˚C
I
F, dc
= 60 mA
Fig. 1
Fig. 1
V
BR
λ
PK
FWHM
C
O
θ
JC
t
r
t
f
3.0
640
13
650
21
60
140
13
10
660
30
V
nm
nm
pF
˚C/W
ns
ns
I
F, dc
= –10
µA
Fig. 3
Fig. 3
V
F
= 0 V, f = 1 MHz
Notes 4,5
10% to 90%,
I
F
= 60 mA
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.
3
Peak Output Power
0˚C to +70˚C unless otherwise noted.
Model Number
HFBR-1505A
SERCOS
HFBR-1515B
PROFIBUS
HFBR-1505C
INTERBUS-S
Symbol
P
T
Min.
–10.5
–7.5
–18.0
–10.5
–7.5
–18.0
–6.2
–16.9
Max.
–5.5
–3.5
–10
–5.5
–3.5
–8.5
0.0
–8.5
Unit
dBm
Condition
POF, I
F, dc
= 35 mA
POF, I
F, dc
= 60 mA
HCS
®
, I
F, dc
= 60 mA
POF, I
F, dc
= 35 mA
POF, I
F, dc
= 60 mA
HCS
®
, I
F, dc
= 60 mA
POF, I
F, dc
= 60 mA
HCS
®
, I
F, dc
= 60 mA
Notes 3,8,9
Figure 2
Notes 2,3,11
Figure 2
Reference
Notes 2,3,11
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 P
T
over temperature are based on a fixed drive current. The recommended drive circuit has temperature
compensation which reduces the variation in P
T
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 I
F,PK
> 60 mA, the duty factor must maintain I
F,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.
2.5
V
F
– FORWARD VOLTAGE – V
10
-40 °C
0
25 °C
NORMALIZED SPECTRAL OUTPUT POWER
P
T
– NORMALIZED OUTPUT POWER – dB
2.3
-40 °C
0 °C
25 °C
70 °C
1.4
1.2
-40 °C
0 °C
1.0
25 °C
0.8
0.6
0.4
0.2
0
610
630
650
670
690
70 °C
85 °C
2.1
-10
85 °C
-20
1.9
85 °C
1.7
-30
1.5
1
10
100
-40
1
10
100
I
F,DO
– TRANSMITTER DRIVE CURRENT – mA
I
F,DO
– TRANSMITTER DRIVE CURRENT – mA
WAVELENGTH – nm
Figure 1. Typical forward voltage vs. drive
current.
Figure 2. Typical normalized optical power vs.
drive current.
Figure 3. Typical normalized optical spectra.
4
1.2
NORMALIZED OUTPUT POWER
2
V
CC
= 5.25 V
1
1.1
V
CC
= 5.0 V
V
CC
= 5.25 V
0
PWD – ns
1.0
V
CC
= 5.0 V
-1
-2
-3
V
CC
= 4.75 V
-4
0.9
V
CC
= 4.75 V
0.8
0.7
-40
-20
0
20
40
60
80
-5
-40
-20
0
20
40
60
80
TEMPERATURE – °C
TEMPERATURE – °C
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).
Recommended Drive Circuit for HFBR-x505A/x515B
TTL COMPATIBLE TRANSMITTER
TTL COMPATIBLE RECEIVER
+5 V V
CC
C1
10 µF
+
R1
C2
0.1 µF
1
8
7
6
5
4
8
U1
DS75451
3
4
5
6
7
8
1
TTL OUTPUT
C4
0.1 µF
0V
R2
2.7
+5 V V
CC
U2
HFBR-15X5
U3
HFBR-25X5
1
2
TTL INPUT
4
0V
R1
82.5
Ω
47
Ω
I
F
35 mA
60 mA
Figure 6. Recommended transmitter and receiver drive circuit (I
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