Part Number Lead Form Shipping Option
HSDL-4250 Straight Bulk
HSDL-4251 Straight Bulk
1.14 ± 0.2
5.8 ± 0.2
5.0 ± 0.2
31.6 min.
0.7 max.
8.7 ± 0.2
2.54
0.50 ± 0.1
CATHODE
FLAT
1.0 min.
Features
High Power AlGaAs LED Technology
870nm Wavelength
T-1¾ Package
Low Cost
Low Forward Voltage: 1.4V at 20mA
High Speed: 40ns Rise Time
Applications
Industrial Infrared Equipments and applications
Portable Infrared Instruments
Consumer Electronics
(Optical mouse, Infrared Remote Controllers etc)
High Speed Infrared Communications
(IR LANs, IR Modems, IR Dongles etc)
Description
The HSDL-4250 and HSDL-4251 High
Performance Infrared emitters were designed
for applications that require high power, low
forward voltage and high speed. It utilizes
Aluminum Galium Arsenide (AlGaAs) LED
technology and is optimized for speed and
efficiency at emission wavelengths of 870nm.
The material used produces high radiant
efficiency over a wide range of currents. The
emitter is packaged in clear T-1¾ (5mm)
package.
HSDL-4250 and HSDL-4251
High-Performance T-1 ¾ (5mm) AlGaAs Infrared (870nm) Lamp
Datasheet
2
Recommended Operating Conditions
Parameter Symbol Min Max Unit Reference
Operating Temperature TO-40 85 °C
Parameter Symbol Min. Typ. Max. Unit Condition Reference
Forward Voltage VF-1.4
1.5
1.6
1.9
VI
FDC=20mA
IFDC=100mA
Figure 2
Figure 3
Forward Voltage
Temperature Coefficient
V/T- -1.44 - mV/°C IFDC=100mA Figure 4
Series Resistance RS-2.5-OhmsI
FDC=100mA
Diode Capacitance CO-75-pFV
bias=0V,
f=1MHz
Thermal Resistance,
Junction to Ambient
Rθja - 300 - °C/W
Electrical Characteristics at 25°°
°°
°C
Absolute Maximum Ratings at 25°°
°°
°C
Parameter Symbol Minimum Maximum Unit Reference
Peak Forward Current IFPK - 500 mA Figure 3
Duty cycle = 20%
Pulse Width = 100us
Forward Current IFDC -100 mA[1]
Power Dissipation PDISS -190 mW
Reverse Voltage VR5- VI
R=100uA
Storage Temperature TS-40 100 °C
LED Junction Temperature TJ110 °C
Lead Soldering Temperature 260 for 5 sec °C
Notes:
1. Derate as shown in Figure 6.
3
Parameter Symbol Min. Typ. Max. Unit Condition Reference
Radiant On-Axis Intensity IEHSDL-4250 124 180 - mW/Sr IFDC=100mA Figure 5
HSDL-4251 56 100 - mW/Sr IFDC=100mA
Radiant On-Axis Intensity
Temperature Coefficient
IE/T- -0.43 - %/°C IFDC=100mA
Viewing Angle 2θ1/2 HSDL-4250 - 15 - ° Figure 7
HSDL-4251 - 30 - ° Figure 7
Peak Wavelength λpk - 870 - nm Figure 1
Peak wavelength
Temperature Coefficient
∆λ/T-0.22-nm/°CI
FDC=100mA
Spectral Width ∆λ 45 - nm IFDC=50mA Figure 1
Optical Rise and Fall Time tr/tf40 - ns IFDC=500mA
Duty Ratio = 20%
Pulse Width=125ns
Figure 1. Relative Radiant Intensity vs. Wavelength Figure 2. DC Forward Current vs. Forward Voltage
Peak Wavelength Vs Relative Radiant Intensity
0
0.2
0.4
0.6
0.8
1
1.2
800 820 840 860 880 900 920 940
Peak Wavelength in nm
Relative Radiant Intensity
V-I Characteristics
1
10
100
0 0.5 1 1.5 2
Vf - Forward Voltage - (V)
If - Forward Current - (mA)
Figure 3. Peak Forward Current vs. Forward Voltage
Forward Voltage Vs Temperature
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
-25 0 25 50 75 100 125
Temperature in Degrees
Forward Voltage in Volts
I-Led=20mA
I-Led=100mA
Figure 4. Forward Voltage vs. Ambient Temperature
Optical Characteristics at 25°°
°°
°C
Peak Forward Voltage Vs Peak Forward Current
1
10
100
1000
0 0.5 1 1.5 2
Vfpk - Peak Forward Voltage - (V)
Ifpk - Peak Forward Current - (mA)
4
Figure 5. Relative Radiant Intensity vs. DC Forward Current
Forward Current Vs Relative Radiant Intensity
0
0.2
0.4
0.6
0.8
1
1.2
0 20 40 60 80 100 120
Forward Current in mA
Relative Radiant Intensity
Maximum Permisible DC forward current vs. ambient temperature
0
10
20
30
40
50
60
70
80
90
100
110
0 102030405060708090
TA- Ambient Temperature -˚C
IFDC MAX - Maximum DC
Forward Current mA
300
Figure 6. DC Forward Current vs. Ambient Temperature Derated
Based on TJMAX=110°°
°°
°C
Figure 7a. Radiant Intensity vs. Angular Displacement for HSDL-4250
4250-Angle Vs Relative Radiant Intensity
0
0.2
0.4
0.6
0.8
1
1.2
-90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Angle in degrees
Relative Radiant Intensity
4251-Angle Vs Relative Radiant Intensity
0
0.2
0.4
0.6
0.8
1
1.2
-100 -90 -80 -70 -60 -50-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100
Angle in Degrees
Relative Radiant Intensity
Figure 7b. Radiant Intensity vs. Angular Displacement for HSDL-4251
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, Pte. in the United States and other countries.
Data subject to change. Copyright © 2006 Avago Technologies Pte. All rights reserved.
5989-4467EN - January3, 2006