Features
• Data transmission at signal rates of dc to 10 MBd
• Up to 50 meters distances with 1 mm Plastic Optical
Fiber (POF)
• Up to 500 meters distances with 200 µm Hard Clad Silica
(HCS®)
• Wide dynamic range receiver allows operation from zero
to maximum link distance with a single transmitter
drive current
• Link distances specied for variations in temperature,
power supply, and ber attenuation
• DC coupled receiver with CMOS/TTL output for easy
designs: no data encoding or digitizing circuitry re-
quired
• Pulse width distortion controlled to limit distortion from
low duty cycle or burst mode data
• High noise immunity
• Compatible with Avago’s Versatile Link family of con-
nectors, for easy termination of ber
Applications
• Industrial control and factory automation
• Serial eld buses
• Intra-system links; Board-to-Board, Rack-to-Rack
• Extension of RS-232, RS-485
• Elimination of ground loops
• High voltage isolation
• Reduces voltage transient susceptibility
CAUTION:. 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.
HCS® is a registered trademark of SpecTran Corporation.
HFBR-0508 Series
HFBR-1528 Transmitter
HFBR-2528 Receiver
10 Megabaud Versatile Link Fiber Optic
Transmitter and Receiver
for 1 mm POF and 200 µm HCS®
Data Sheet
Description
The HFBR-0508 Series consists of a ber-optic trans-
mitter and receiver operating at a 650 nm wave-
length (red). The HFBR-1528 transmitter is an
LED in a low cost plastic housing designed to ef-
ciently couple power into 200 µm diameter HCS
and 1 mm diameter POF. The HFBR-2528 receiver incor-
porates a PIN detector and digital output IC compatible
with CMOS and TTL logic families.
HFBR-0508 links operate from DC to 10 MBd at distances
up to 50 meters with 1 mm POF and up to 500 meters
with 200 µm HCS®. No minimum link distances are re-
quired when using recommended circuits, simplifying
design.
Versatile Link components can be interlocked (N-
plexed together) to minimize space and to provide
dual connections with the duplex connectors. Up to
eight packages can be interlocked and inserted into a
printed circuit board.
POF and HCS are available in pre-connectored lengths or
can be easily eld-terminated. A single transmitter drive
current for POF and HCS allows both bers to be used
with a single design.
2
Notes:
1. Typical data at +25°C, VCC = 5 V.
2. With recommended transmitter and receiver application circuits (60 mA nominal drive current).
3. POF is HFBR-R/EXXYYY plastic (1 mm) optical ber. Worst case attenuation used (0.23 dB/m from -40°C to +85°C at 660 nm).
4. HCS is HFBR-H/VXXYYY hard clad silica (200/230 µm) ber. Worst case attenuation is used (10 dB/km from 0°C to +70°C and 12 dB/km from
-40°C to +85°C at 650 nm).
5. BER ≤ 10-9, 223 - 1 PRBS NRZ 10 MBd.
6. For IF,PK > 60 mA, the duty factor must maintain IF,AV ≤ 60 mA and pulse with ≤ 1 µs.
7. 1.6 mm below seating plane.
Recommended Operating Conditions
Parameter Symbol Min. Max. Unit Condition Note
Ambient Temperature TA -40 +85 °C
Power Supply Voltage VCC 4.75 5.25 V <100 mVp-p Noise
Transmitter Peak Forward Current IF,PK 20 90 mA 6
Transmitter Average Forward Current IF,AV 60 mA
Fanout (7400 Series TTL) N 1
Specied Link Performance, TA = -40° to +85°C, DC to 10 MBd, unless otherwise noted.
Parameter Symbol Min. Max. Unit Condition Note
Signaling Rate fS DC 10 Mb/s NRZ 2
Link Distance with Extra Low 0.1 50 m +25°C 2, 3, 5
Loss POF Cable 0.1 40 0 to +70°C
0.1 30 -40 to +85°C
Link Distance with 200 µm 0.1 500 m +25°C 2, 4, 5
HCS Cable 0.1 300 0 to +70°C
0.1 100 -40 to +85°C
Pulse Width Distortion PWD -30 +30 ns 25 – 75% Duty Cycle 2
-50 +50 ns Arbitrary Duty Cycle
HFBR-0508 Series 10 MBd Data Link
Typical Link Performance, TA = +25°C
Parameter Symbol Typ.[1] Unit Condition Note
Signaling Rate fS 15 Mb/s NRZ 2
Link Distance with Extra Low Loss POF Cable 100 m 10 MBd 2, 3, 5
Link Distance with 200 µm HCS Cable 900 m 10 MBd 2, 4, 5
Absolute Maximum Ratings
Parameter Symbol Min. Max. Unit Note
Storage and Operating Temperature TS,O -40 +85 °C
Receiver Supply Voltage VCC -0.5 +5.5 V
Receiver Average Output Current IO,AVG -16 +16 mA
Receiver Output Power Dissipation POD 80 mW
Transmitter Peak Forward Input Current IF,PK 90 mA 6
Transmitter Average Forward Input Current IF,AVG 60 mA
Transmitter Reverse Input Voltage VR 3 V
Lead Soldering Cycle Temp TSOL +260 °C 7
Time 10 sec 7
3
ANODE 1
CATHODE 2
GROUND 3
GROUND 4
8 GROUND
5 GROUND
SEE NOTE 5
HFBR-1528 Transmitter
HFBR-1528 Transmitter, Top View
HFBR-1528 Transmitter
The HFBR-1528 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 ber
(POF) and Hard Clad Silica (HCS) ber. This transmitter can
be operated up to 10 MBd using a simple driver circuit. The
HFBR-1528 is compatible with all Versatile Link connectors.
Electrical and Optical Characteristics: TA = -40° to +85°C unless otherwise noted.
Parameter Symbol Min. Typ.[1] Max. Units T
A (°C) Conditions Note
Peak Output Power PT -6.0 -3.5 0.0 dBm +25 IF, dc = 60 mA 2, 3
-6.9 +0.5 0 to +70
-7.2 +1.3 -40 to +85
Peak Output Power PT -15.6 -9.0 -2.0 dBm +25 IF,dc = 20 mA 2, 3
-16.5 -1.5 0 to +70
-16.8 -0.7 -40 to +85
Peak Output Power PT -16.1 -12.5 -8.5 dBm +25 IF,dc = 60 mA 2, 3
-17.0 -8.0 0 to +70
-17.3 -7.2 -40 to +85
Optical Power Tem- ∆PT/∆T -0.40 %/°C
-0.02 dB/°C
Peak Emission λP 640 650 660 nm 0 to +70
635 662 -40 to +85
Peak Wavelength ∆λ/∆T 0.12 nm/°C
Temperature
Coecient
Spectral Width FWHM 21 nm Fig. 3
Forward Voltage VF 1.8 2.1 2.65 V IF,dc = 60 mA Fig. 1
Forward Voltage Tem- ∆VF/∆T -1.8 mV/°C Fig. 1
perature Coecient
Reverse Input Break- VBR 3.0 13 V IF,dc = -10 µA
down Voltage
Diode Capacitance CO 60 pF VF = 0 V,
f = 1 MHz
Transmitter NA 0.5
Numerical Aperture
Thermal Resistance, θjc 140 °C/W 4
Junction to Case
50 Ω Optical Rise Time tr 13 ns 10% to 90%,
IF = 60 mA
50 Ω Optical Fall Time tf 10 ns
Notes:
1. Typical data are at 25°C.
2. Optical power measured at the end of 0.5 meters of 1 mm diameter plastic or 200 µm diameter hard clad silica ber with a large area detector.
3. Minimum and maximum values for PT over temperature are based on a xed drive current. The recommended drive circuit has temperature
compensation which reduces the variation in PT over temperature; refer to Figures 4 and 6.
4. Typical value measured from junction to PC board solder joint for horizontal mount package, HFBR-1528.
5. Pins 5 and 8 are for mounting and retaining purposes, but are electrically connected; pins 3 and 4 are electrically isolated. It is recommended
that pins 3, 4, 5 and 8 all be connected to ground to reduce coupling of electrical noise.
6. Refer to the “Plastic Optical Fiber and HCS Fiber Cable and Connectors for Versatile Link” Technical Data Sheet for cable connector options for 1
mm plastic and 200 µm HCS optical ber.
Fig. 3
1 mm POF, 60 mA
1 mm POF, 20 mA
200 µm HCS, 60 mA
Fig. 2
Fig. 2
Fig. 2
perature Coecient
Wavelength
4
WARNING: WHEN VIEWED UNDER SOME CONDITIONS, THE OPTICAL PORT MAY EXPOSE THE EYE BEYOND THE MAXIMUM PERMISSIBLE EXPO-
SURE RECOMMENDED IN ANSI Z136.2, 1993. UNDER MOST VIEWING CONDITIONS THERE IS NO EYE HAZARD.
Figure 6. Recommended Transmitter Drive Circuit
(IF,on = 60 mA Nominal at TA = 25°C).
Figure 5. Typical Optical Pulse Width Distortion vs. Temperature and Power
Supply Voltage (in Recommended Drive Circuit).
VCC
VALUE
HFBR-1528 fig 6
1
4
2
3
8
5
DATA
C1
R1
HFBR-1528
TOLERANCE
R1
R2
2 KΩ
47 Ω
5 %
1 %
6 8 5
7
R2
C2
4
C1
C2
0.1 µF
1.0 µF
20 %
20 %
1/2 SN75451
Figure 4. Typical Normalized Optical Power vs. Temperature (in Recom-
mended Drive Circuit).
Figure 3. Typical Normalized Optical Spectra.
VF – FORWARD VOLTAGE – V
1
2.1
1.5
IF,DC – TRANSMITTER DRIVE CURRENT – mA
10 100
2.5
1.7
HFBR-1528 fig 1
2.3
1.9
25° C
0° C
70° C
85° C
-40° C
Figure 2. Typical Normalized Optical Power vs. Drive Current.Figure 1. Typical Forward Voltage vs. Drive Current.
NORMALIZED SPECTRAL OUTPUT POWER
610
1.2
0.6
0
WAVELENGTH (nm)
630 650 670 690
1.0
0.2
HFBR-1528 fig 3
0.8
0.4
1.4
25° C
0° C
-40° C
70° C
85° C
NORMALIZED OUTPUT POWER
-40
1.2
0.9
0.7
TEMPERATURE – °C
-20 20 60
1.1
0.8
HFBR-1528 fig 4
1.0
0 40 80
V
CC
= 5.25 V
V
CC
= 5.0 V
V
CC
= 4.75 V
PT – NORMALIZED OUTPUT POWER – dB
1
-10
-40
IF,DC – TRANSMITTER DRIVE CURRENT – mA
10 100
10
-30
HFBR-1528 fig 2
0
-20
25° C
85° C
-40° C
PWD – ns
-40
2
-1
-5
TEMPERATURE – °C
20
1
-2
HFBR-1528 fig 5
0
60
-3
-4
V
CC
= 5.25 V
V
CC
= 5.0 V
V
CC
= 4.75 V
0 40 80
-20
5
HFBR-2528 Receiver
The HFBR-2528 receiver consists of
a silicon PIN photodiode and digitiz-
ing IC to produce a logic compatible
output. The IC includes a unique
circuit to correct the pulse width
distortion of the rst bit after a long
idle period. This enables operation
from DC to 10 MBd 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, conductive plastic, compat-
ible with all Versatile Link connec-
tors.
Electrical and Optical Characteristics: TA = -40° to +85°C, 4.75 V < VCC < 5.25 V, unless otherwise noted.
Parameter Symbol Min. Typ.[1] Max. Unit T
A (°C) Condition Note Fig.
Peak POF Sensitivity: PRL,min -23.0 -21.0 dBm +25 1 mm POF, 2,6 2,4
Minimum Input for -20.0 0 to +70 |PWD| < 30 ns
Logic “0” -19.5 -40 to +85
Peak POF Overdrive PRL,max +1.0 +5.0 dBm +25 1 mm POF, 2,3, 1,2,
Limit:Maximum +0.0 0 to +70 |PWD| < 30 ns 6 3
Input for Logic “0” -1.0 -40 to +85
Peak POF O State PRH,max -42 dBm 1 mm POF 2,6,
Limit: Maximum 8
Input for Logic “1”
Peak HCS PRL,min -25.0 -23.0 dBm +25 200 µm HCS, 2,6
Sensitivity: Minimum -22.0 0 to +70 |PWD| < 30 ns
Input for Logic “0” -21.5 -40 to +85
Peak HCS Overdrive PRL,max -1.0 +3.0 dBm +25 200 µm HCS, 2,3,
Limit: Maximum -2.0 0 to +70 |PWD| < 30 ns 6
Input for Logic “0” -3.0 -40 to +85
Peak HCS O State PRH,max -44 dBm 200 µm HCS 2,6,
Limit: Maximum 8
Input for Logic “1”
Supply Current ICC 27 45 mA VO = Open
High Level Output VOH 4.2 4.7 V IO = -40 µA
Voltage
Low Level Output VOL 0.22 0.4 V IO = +1.6 mA
Voltage
Output Rise Time tr 12 30 ns CL = 10 pF 6
Output Fall Time tf 10 30 ns CL = 10 pF 6
Thermal Resistance, θjc 200 °C/W 4
Junction to Case
Electric Field EMAX 8 V/m Near Field, 5
Immunity Electrical
Field Source
Power Supply PSNI 0.1 0.4 Vpp Sine Wave 6
Noise Immunity DC - 10 MHz
Notes:
1. Typical data are at +25°C, VCC = 5.0 V.
2. Input power levels are for peak (not average) optical input levels. For 50% duty cycle data, peak optical power is twice the average optical
power.
3. Receiver overdrive (PRL,max) is specied as the limit where |PWD| will not exceed 30 ns. The receiver will be in the correct state (logic “0”) for opti-
cal powers above PRL,max. However, it may not meet a 30% symbol period PWD if the overdrive limit is exceeded. Refer to Figure 2 for PWD per-
formance at high received optical powers.
4. Typical value measured from junction to PC board solder joint for horizontal mount package, HFBR-2528.
5. Pins 5 and 8 are electrically connected to the conductive housing and are also used for mounting and retaining purposes. It is required that
pins 5 and 8 be connected to ground to maintain conductive housing shield eectiveness.
6. In recommended receiver circuit, with an optical signal from the recommended transmitter circuit.
7. Pin 4 is electrically isolated internally. Pin 4 may be externally connected to pin 1 for board layout compatibility with HFBR-25X1, HFBR-25X2
and HFBR-25X4. Otherwise it is recommended pin 4 be grounded as in Figure 5.
8. BER ≤ 10E-9, includes a 10.8 dB margin below the receiver switching threshold level (signal to noise ratio = 12).
HFBR-2528 Receiver, Top View
NO CONNECT
4
VCC
3
GROUND
2
VO
1
GROUND 5
GROUND 8
SEE NOTES 5,7
HFBR-2528 Receiver
IC
6
Figure 5. Recommended Receiver Application Circuit.
Figure 4. Typical POF Receiver Pulse Width Distortion vs. Power Supply Voltage at Low
Optical Power, (-21 dBm,pk, 10 MBd).
Figure 3. Typical POF Receiver Pulse Width Distortion vs. Power Supply Volt-
age at High Optical Power (0 dBm,pk, 10 MBd).
RECEIVED PWD – ns
-22
30
10
-30
P
RL
– RECEIVER OPTICAL INPUT POWER – dBm
-18
20
0
HFBR-2528 fig 2
-2
-10
-20
-14 -10 -6 2
RECEIVED POWER – dBm
-40
6
4
0
TEMPERATURE – °C
-20
5
3
HFBR-2528 fig 1
100
2
1
0 20 40 60 80
VCC = 5.25 V
VCC = 5.0 V
VCC = 4.75 V
Figure 2. Typical POF Receiver Pulse Width Distortion vs. Optical
Power at 10 MBd.
Figure 1. Typical POF Receiver Overdrive, PRL,max, at 10 MBd, vs. Tempera-
ture and Power Supply Voltage.
PWD – ns
4.7
16
9
VCC – VOLTS
4.8
HFBR-2528 fig 3
5.55.0 5.1 5.34.9 5.2 5.4
13
12
11
10
14
15
PWD – ns
4.7
-13
-18
V
CC
– VOLTS
4.8
-14
-15
HFBR-2528 fig 4
5.5
-16
-17
5.0 5.1 5.34.9 5.2 5.4
HFBR-0508 Circuit Board Layout
4 13 2
5 8
7.62
(0.300)
1.01° (0.040) DIA.
1.85
(0.073)MIN.
TOP VIEW
2.54
(0.100)
7.62
(0.300)
Figure 6. HFBR-2528 Receiver Block Diagram.
Versatile Link Mechanical Dimensions Versatile Link Printed Circuit Board
Layout Dimensions
HFBR-2528 fig 6
3 VCC
PIN
PHOTODIODE
AMPLIFIER
COM-
PARATOR
8 GROUND
1 VO, DATA
2 GROUND
5 GROUND
REFERENCE
VOLTAGE
THRESHOLD
GENERATOR
FIRST BIT
BURST PWD
CORRECTION
6.5
(0.255)
10.2
(0.400)
4.2
(0.165)
1.27
(0.050)
2.5
(0.100)
0.51
(0.020)
PIN NO.1 INDICATOR
18.9
(0.743)
2.0
(0.080)
7.62
(0.300)
0.64
(0.025)
7.62
(0.300)
3.0
(0.118)
1.73
(0.068)
0.64 (0.025) DIA.
NOTE: ALL DIMENSIONS IN MM (INCHES).
ALL DIMENSIONS ± 0.25 mm UNLESS
OTHERWISE SPECIFIED.
5.1
(0.200)
3.81(0.150) MAX.
3.56 (0.140) MIN.
TRANSMITTER
HFBR-1528
RECEIVER
HFBR-2528
1
2
3
4
5
8
ANODE
CATHODE
GROUND*
GROUND*
GROUND**
GROUND**
SIGNAL, V
O
GROUND
V
CC
(+5 V)
GROUND*
GROUND**
GROUND**
PIN NO.
* NO INTERNAL CONNECTION,
GROUND CONNECTION RECOMMENDED.
** PINS 5 AND 8 CONNECTED INTERNALLY
TO EACH OTHER.
ELECTRICAL PIN FUNCTIONS
8
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Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies Limited in the United States and other countries.
Data subject to change. Copyright © 2007 Avago Technologies Limited. All rights reserved. Obsoletes 5988-5674EN
AV02-0909EN - December 7, 2007