3-29
Absolute Maximum Ratings
Parameter Symbol Min. Max. Unit Reference
Storage Temperature TS-40 85 °C
Operating Temperature TO-40 70 °C
Lead Soldering Temperature 260 °C Note 1
10 s
Transmitter High Level Forward IF,H 120 mA 50% Duty Cycle
Input Current ≥ 1 MHz
Transmitter Average Forward Input Current IF,AV 60 mA
Reverse Input Voltage VR3V
125 Megabaud Versatile Link
Transmitter
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.
CAUTION: The small junction sizes inherent to the design of this component increase the component's suscepti-
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.
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 fiber
or 200 µm diameter hard clad
silica glass optical fiber. Refer to
Application Note 1066 for details
for recommended interface
circuits.
ANODE 1
CATHODE 2
GROUND 3
GROUND 4
GROUND
GROUND
SEE NOTE 6
Cycle Time
3-30
Electrical/Optical Characteristics 0 to 70°C, unless otherwise stated.
Parameter Symbol Min. Typ.[2] Max. Unit Condition Note
Transmitter Output PT-9.5 -7.0 -4.8 dBm IF,dc = 20 mA, 25°C Note 3
Optical Power, 1 mm POF -10.4 -4.3 0-70°C
Transmitter Output PT-6.0 -3.0 -0.5 dBm IF,dc = 60 mA, 25°C Note 3
Optical Power, 1 mm POF -6.9 -0.0 0-70°C
Transmitter Output PT-14.6 -13.0 -10.5 dBm IF,dc = 60 mA, 25°C Note 3
Optical Power, -15.5 -10.0 0-70°C
200 µm HCS®
Output Optical Power ∆PT-0.02 dB/°C
Temperature Coefficient ∆T
Peak Emission Wavelength λPK 640 650 660 nm
Peak Wavelength ∆λ 0.12 nm/°C
Temperature Coefficient ∆T
Spectral Width FWHM 21 nm Full Width,
Half Maximum
Forward Voltage VF1.8 2.1 2.4 V IF = 60 mA
Forward Voltage ∆VF-1.8 mV/°C
Temperature Coefficient ∆T
Transmitter Numerical NA 0.5
Aperture
Thermal Resistance, θjc 140 °C/W Note 4
Junction to Case
Reverse Input Breakdown VBR 3.0 13 V IF,dc = -10 µA
Voltage
Diode Capacitance CO60 pF VF = 0 V,
f = 1 MHz
Unpeaked Optical Rise tr12 ns IF = 60 mA Figure 1
Time, 10% - 90% f = 100 kHz Note 5
Unpeaked Optical Fall tf9nsI
F
= 60 mA Figure 1
Time, 90% - 10% f = 100 kHz 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 µm diameter hard clad silica optical fiber with a large
area detector.
4. Typical value measured from junction to PC board solder joint for horizontal mount package, HFBR-1527. θjc 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 fiber and 200 µm HCS fiber.
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.
3-31
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
Figure 2. Typical Spectra Normalized
to the 25°C Peak.
Figure 1. Test Circuit for Measuring
Unpeaked Rise and Fall Times.
Figure 3. Typical Forward Voltage vs.
Drive Current. Figure 4. Typical Normalized Output
Optical Power vs. Drive Current.
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
