HFBR-0507ETZ Series
HFBR-1527ETZ Transmitters
HFBR-2526ETZ Receivers
125 Megabaud Versatile Link
The Versatile Fiber Optic Connection
Data Sheet
Features
-40° to +85°C operating temperature range
RoHS-compliant
Data transmission at signal rates of 1 to 125 MBd over
distances of 100 m
Compatible with inexpen sive, easily terminated plastic
optical ber, and with large core silica ber
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: board-to-board, rack-to-rack
Telecommunications switching systems
Computer-to-peripheral data links, PC bus extension
Industrial control
Proprietary LANs
Renewable energies
Medical instruments
Reduction of lightning and voltage transient suscep-
tibility
HCS is a registered trademark of OFS Corporation.
Description
The 125 MBd Versatile Link (HFBR-0507ETZ Series) is the
most cost-e ective ber-optic solution for transmission
of 125 MBd data over 100 m. The data link consists of
a 650 nm LED transmitter, HFBR-1527ETZ, and a PIN/
preamp receiver, HFBR-2526ETZ. 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 m. The lower attenuation of silica ber allows data
transmission over longer distance, for a small di erence in
cost. These com po nents can be used for high speed data
links without the problems common with copper wire
solutions, at a competitive cost.
The HFBR-1527ETZ 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 m
Hard Clad Silica (HCS®) ber. With the recom mended drive
circuit, the LED operates at speeds from 1-125 MBd. The
HFBR-2526ETZ is a high band width analog receiver con-
tain ing a PIN photodiode and internal transimpedance
ampli er. With the recommended applica tion circuit for
125 MBd operation, the performance of the complete data
link is speci ed for of 0-25 m with plastic ber and 0-100 m
with 200 m HCS ber. A wide variety of other digitizing
circuits can be combined with the HFBR-0507ETZ Series to
optimize performance and cost at higher and lower data
rates.
2
HFBR-0507ETZ Series
125 MBd Data Link
Data link operating conditions and performance are speci ed for the HFBR-1527ETZ transmitter and HFBR-2526ETZ
receiver in the recommended applications circuits shown in Figure 1. This circuit has been optimized for 125 MBd
operation. For other data rate application, please refer to application notes: AN1121, AN1122 and AN1123.
Recommended Operating Conditions for the Circuits in Figures 1 and 2
Parameter Symbol Min. Max. Unit Reference
Ambient Temperature TA-40 85 °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 with recommended 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 l 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 l 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 l 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 V
CC - 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-1527ETZ transmitter, HFBR-2526ETZ 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-RXXYYYZ plastic optical ber, with a maximum attenuation of 0.24 dB/m at 650 nm and NA = 0.5.
Extra low loss cable is plastic optical ber, with a maximum attenuation of 0.19 dB/m at 650 nm and NA = 0.5.
HCS cable is 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 m 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 long term 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-1527ETZ 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 μm HCS) Transmitter Application Circuit
Performance of the HFBR-1527ETZ 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 µm HCS Pavg -14.6 dBm 50% Duty Cycle Note 1, Fig 3
Average Modulated Power 200 µm 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 Figure 1
Notes:
1. Average optical power is measured with an average power meter at 50% duty cycle, after 1 m of ber.
2. To allow the LED to switch at high speeds, the recommended drive circuit modulates LED light output between two non-zero power levels. The
modulated (useful) power is the di erence between the high and low level of light output power (transmitted) or input power (received), which
can be measured with an average power meter as a function of duty cycle (see Figure 3). Average Modulated Power 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-1527ETZ LED. The low level LED “o ” current, sometimes referred to as
“hold-on” current, is prebias supplied to the LED during the o state to facilitate fast switching speeds.
4
Figure 1. Transmitter and receiver application circuit with +5 V ECL inputs and outputs.
Plastic and Hard Clad Silica Optical Fiber Receiver Application Circuit
Performance[4] of the HFBR-2526ETZ 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 TBA mA RL = Figure 1
Notes:
4. Performance in response to a signal from the HFBR-1527ETZ transmitter driven with the recommended circuit at 1-125 MBd over 1 m of HFBR-RZ/
EXXYYYZ plastic optical ber or 1 m of 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.
1
2
3
4
5
8
U2A
HFBR-15X7ETZ
U1C
74ACTQ00
Q3
MMBT3904LT1
8
11
6
10
9
+
U1D
74ACTQ00
13
12
U1B
74ACTQ00
U1A
74ACTQ00
5
4
3
2
1
L1
TDK
#HF30ACB453215
C7
0.001 PF
+5 V
TD+
R8
TD–
C6
0.1 PF
C5
10 PF
C4
0.001 PF
C3
0.1 PF
C2
0.1 PF
C1
0.001 PF
R9
C8 R10
R6
91
R7
91
R11
R5
22
Q2
BFT92
Q1
BFT92
0 V
16
15
14
13
12
11
10
98
7
6
5
4
3
2
1
MC2045-2Y
1
2
3
4
5
8
U3A
HFBR-
2526ETZ
R13
4.7
R12
4.7
+
C9
0.1 PF
C10
0.1 PF
C12
10 nFC11
10 nF C14
10 nF
C13
1 nF
R18
2.2k
R17
2.2k
R14
800
C19
0.1 PF
C21
0.1 PF
L3
COILCRAFT 1008LS-122XKBC
L2
COILCRAFT 1008LS-122XKBC
RD+
RD-
SD+
0 V
+5 V
Caz-
Caz+
GDNa
Din
Din
Vcca
CF
JAM
NC
Vcce
Dout
Dout
GDNe
ST
ST
Vset
+
C20
10 PF
+C22
10 PF
5
Figure 2. Recommended power supply lter and +5 V ECL signal terminations for the transmitter and receiver application circuit of Figure 1
Figure 4. Typical optical power budget vs. data rateFigure 3. Average modulated power
8 TD
9 TX VEE
7 TD
6 TX VCC
5 RX VCC
4
3 RD
2 RD
82
10 μF 0.1 μF
4.7 μH
0.1 μF
1 RX VEE
+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
200
100
0
DUTY CYCLE %
150
50
0 20 40 80 10060
AVERAGE POWER,
50% DUTY CYCLE
AVERAGE
MODULATED
POWER
OPTICAL POWER BUDGET dB
21
15
9
DATA RATE MBd
19
11
17
13
10 9070 130 15011030 50
POF
HCS
6
125 Megabaud Versatile Link Transmitter
HFBR-1527ETZ Series
Description
The HFBR-1527ETZ transmitters incorporate a 650 nano-
meter LED in a horizontal (HFBR-1527ETZ) gray housing.
The HFBR-1527ETZ transmitters are suitable for use with
current peaking to decrease response time and can be
used with HFBR-2526ETZ 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.
Absolute Maximum Ratings
Parameter Symbol Min. Max. Unit Reference
Storage Temperature TS-40 85 °C
Operating Temperature TO-40 85 °C
Lead Soldering Temperature Cycle Time 260
10
°C
s
Note 1, 9
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
ANODE 1
CATHODE 2
GROUND 3
GROUND 4
GROUND
GROUND
SEE NOTE 6
CAUTION: The small junction sizes inherent to the design of this component increase the component’s suscep ti bility
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 may expose the eye beyond the maximum permissible
exposure recommended in ansi z136.2, 1993. Under most viewing conditions there is no eye hazard.
7
Electrical/Optical Characteristics -40 to 85° C, unless otherwise stated.
Parameter Symbol Min. Typ.[2] Max. Unit Condition Note
Transmitter Output Peak Optical Power,
1 mm POF
PT-9.5
-10.4
-7.0 -4.8
-3.5
dBm IF,dc = 20 mA, 25° C
-40 - 85° C
Note 3
NA=0.5
Transmitter Output Peak Optical Power,
1 mm POF
PT-6.0
-6.9
-3.0 -0.5
0.8
dBm IF,dc = 60 mA, 25° C
-40 - 85° C
Note 3
NA=0.5
Transmitter Output Peak Optical Power,
200 m HCS
PT-14.6
-16.0
-13.0 -10.5
-9.2
dBm IF,dc = 60 mA, 25° C
-40 - 85° C
Note 3
NA=0.x
Output Optical Power Temperature
Coe cient
PT
T
-0.02 dB/° C
Peak Emission Wavelength PK 635 650 662 nm
Peak Wavelength Temperature
Coe cient
T
0.12 nm/° C
Spectral Width FWHM 21 nm Full Width,
Half Maximum
Forward Voltage VF 1.8 2.1 2.65 V IF = 60 mA
Forward Voltage Temperature
Coe cient
VF
T
-1.8 mV/°C
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%
tr10 ns IF = 60 mA
f = 100 kHz
Figure 1
Note 5
Unpeaked Optical Fall Time,
90% –10%
tf11 ns IF = 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 either 0.5m of 1mm diameter POF (NA=0.5) or 5m of 200 um diameter HCS (NA=0.37) with a large area
detector.
4. Typical value measured from junction to PC board solder joint for horizontal mount package, HFBR-1527ETZ.
5. Optical rise and fall times can be reduced with the appropriate driver circuit.
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.
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.
9. Moisture sensitivity level is MSL-4
8
Figure 6. Typical spectra at 25° CFigure 5. Test circuit for measuring unpeaked rise and fall times
Figure 7. Typical forward voltage vs. drive current Figure 8. Typical normalized output optical power vs. drive current
NORMALIZED SPECTRAL OUTPUT POWER
1.2
0.6
0
WAVELENGTH (nm)
1.0
0.2
0.8
0.4
620 630 650 670 680660640
25° C
HP8082A
PULSE
GENERATOR
50 W
LOAD
RESISTOR
HP54002A
50 W BNC
INPUT POD
HP54100A
OSCILLOSCOPE
BCP MODEL 300
500 MHz
BANDWIDTH
SILICON
AVALANCHE
PHOTODIODE
1.6
1.7
1.8
1.9
2
2.1
2.2
2.3
2.4
110100
-40
25
85
IF-DC - TRANSMITTER DRIVE CURRENT (mA)
VF - FORWARD VOLTAGE - V
-16
-14
-12
-10
-8
-6
-4
-2
0
2
110100
IF-DC - TRANSMITTER DRIVE CURRENT (mA)
PT - NORMALIZED OUTPUT POWER - dB
-40
25
85
9
125 Megabaud Versatile Link Receiver
HFBR-2526ETZ Series
Description
The HFBR-2526ETZ receivers contain a PIN photodiode
and transimpedance pre-ampli er circuit in a horizontal
(HFBR-2526ETZ) blue housing, and are designed to inter-
face 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 performance 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.
Absolute Maximum Ratings
Parameter Symbol Min. Max. Unit Reference
Storage Temperature TS-40 85 °C
Operating Temperature TA-40 85 °C
Lead Soldering Temperature Cycle Time 260
10
°C
s
Note 1, 11
Signal Pin Voltage VO-0.5 VCC V
Supply Voltage VCC -0.5 6.0 V
Output Current IO25 mA
CAUTION: The small junction sizes inherent to the design of this component increase the component’s suscep ti bility
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.
1
2
GROUND
3
4
GROUND
GROUND
SEE NOTES 2, 4, 9
GROUND
SIGNAL
VCC
10
Electrical/Optical Characteristics -40 to 85° C; 5.25 V ≥ V
CC ≥ 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 µm 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 µm 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 915 mA
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, -3dB 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%
V100%
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.
11. Moisture sensitivity level is MSL-4
11
Figure 9. Recommended power supply lter 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. tempera-
ture
HFBR-25X6ETZ
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 © 2005-2011 Avago Technologies. All rights reserved.
AV02-2590EN - August 10, 2011
Versatile Link Mechanical Dimensions Versatile Link Printed Circuit Board Layout Dimensions
HORIZONTAL MODULES
HFBR-1527ETZ
HFBR-2526ETZ
6.86
(0.270)
10.16
(0.400)
4.19
(0.165)
1.27
(0.050)
2.54
(0.100)
0.51
(0.020)
18.8
(0.74)
2.03
(0.080)
7.62
(0.30)
0.64
(0.025)
7.62
(0.300)
2.77
(0.109)
1.85
(0.073)
0.64 (0.025) DIA.
5.08
(0.200)
3.81 (0.150) MAX.
3.56 (0.140) MIN.
4 13 2
5 8
7.62
(0.300)
1.01 (0.040) DIA.
1.85
(0.073) MIN.
PCB EDGE
TOP VIEW
2.54
(0.100)
7.62
(0.300)
HORIZONTAL MODULE
TOP VIEWS
DIMENSIONS IN MILLIMETERS (INCHES).
ELECTRICAL PIN FUNCTIONS
Pin No. Transmitters
HFBR-1527ETZ Receivers
HFBR-2526ETZ
1 ANODE SIGNAL
2 CATHODE GROUND
3 GROUND* GROUND
4 GROUND* VCC +5 V
5 GROUND** GROUND**
8 GROUND** GROUND**
* No internal connection
** Pins 5 and 8 connected internally to each other only.
