0.040 (1.02)
0.100 (2.54)
0.050 (1.27)
45°
0.040 (1.02)
13
0.030 (0.76)
NOM
0.184 (4.67)
0.209 (5.31)
1.00 (25.4)
MIN
0.255 (6.48)
ANODE
(CASE)
Ø0.020 (0.51) 2X
PACKAGE DIMENSIONS
FEATURES
• Good optical to mechanical alignment
• Mechanically and wavelength matched to the TO-18 series phototransistor
• Hermetically sealed package
• High irradiance level
NOTES:
1. Dimensions for all drawings are in inches (mm).
2. Tolerance of ± .010 (.25) on all non-nominal dimensions
unless otherwise specified.
DESCRIPTION
The LED55B/LED55C/LED56 are 940 nm LEDs in a narrow angle, TO-46 package.
ANODE
(Connected
To Case)
3
1
CATHODE
SCHEMATIC
2001 Fairchild Semiconductor Corporation
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GaAs INFRARED EMITTING DIODE
LED55B LED55C LED56
www.fairchildsemi.com 2 OF 4 6/05/01 DS300312
Parameter Symbol Rating Unit
Operating Temperature TOPR -65 to +125 °C
Storage Temperature TSTG -65 to +150 °C
Soldering Temperature (Iron)(3,4,5 and 6) TSOL-I 240 for 5 sec °C
Soldering Temperature (Flow)(3,4 and 6) TSOL-F 260 for 10 sec °C
Continuous Forward Current IF100 mA
Forward Current (pw, 1µs; 200Hz) IF10 A
Reverse Voltage VR3V
Power Dissipation(TA= 25°C)(1) PD170 mW
Power Dissipation(TC= 25°C)(2) PD1.3 W
ABSOLUTE MAXIMUM RATINGS (TA= 25°C unless otherwise specified)
PARAMETER TEST CONDITIONS SYMBOL MIN TYP MAX UNITS
Peak Emission Wavelength IF= 100 mA !P— 940 — nm
Emission Angle at 1/2 Power IF= 100 mA "— ±8 — Deg.
Forward Voltage IF= 100 mA VF— — 1.7 V
Reverse Leakage Current VR= 3 V IR— — 10 µA
Total Power LED55B(7) IF= 100 mA PO3.5 — — mW
Total Power LED55C(7) IF= 100 mA PO5.4 — — mW
Total Power LED56(7) IF= 100 mA PO1.5 — — mW
Rise Time 0-90% of output tr— 1.0 — µs
Fall Time 100-10% of output tf— 1.0 — µs
ELECTRICAL / OPTICAL CHARACTERISTICS (TA=25°C) (All measurements made under pulse conditions)
NOTE:
1. Derate power dissipation linearly 1.70 mW/°C above 25°C ambient.
2. Derate power dissipation linearly 13.0 mW/°C above 25°C case.
3. RMA flux is recommended.
4. Methanol or isopropyl alcohols are recommended as cleaning agents.
5. Soldering iron tip 1/16” (1.6mm) minimum from housing.
6. As long as leads are not under any stress or spring tension
7. Total power output, PO, is the total power radiated by the device into a solid angle of 2 #steradians.
GaAs INFRARED EMITTING DIODE
LED55B LED55C LED56
Figure 1. Power Output vs. Input Current
0.01
.001 .002 .005 .01 .02 .05 0.1 0.2 0.5 1.0 2 5 10
IF, FORWARD CURRENT (A)
0.02
0.05
0.1
0.2
0.5
1.0
2
5
10
20
50
100
PO, NORMALIZED POWER OUTPUT
IF = 100 mA
TA = 25
°
C
NORMALIZED TO
CONTINUOUS
FORWARD
CURRENT
PW = 80 µsec
PULSED
FORWARD
CURRENT
Figure 2. Power Output vs. Temperature
0
0.2
-50
TA, AMBIENT TEMPERATURE (
°
C)
0.4
0.6
0.8
1.0
1.2
1.4
-25 0 150
PO, NORMALIZED POWER OUTPUT
755025 100 125
IF = 100 mA
TA = 25
°
C
NORMALIZED TO
Figure 5. Typical Radiation Pattern
0
20
-50
θ - ANGULAR DISPLACEMENT FROM OPTICAL AXIS (DEGREES)
40
60
80
100
-40 -30 -20 50
RELATIVE OUTPUT (%)
100-10 20 30 40
Figure 4. Forward Voltage vs. Forward Current
1
2
.9
VF, FORWARD VOLTAGE (V)
4
6
8
10
20
40
60
80
100
1.0 1.1 1.2
IF, FORWARD CURRENT (mA)
1.51.41.3
Figure 3. Forward Voltage vs. Forward Current
.01
.02
VF, FORWARD VOLTAGE (V)
.04
.06
.08
0.1
0.2
0.4
0.6
0.8
1.0
2.0
4.0
6.0
8.0
10
01 28
IF, FORWARD CURRENT (A)
54367109
TA = 100
°
C 25
°
C -55
°
C
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TYPICAL PERFORMANCE CURVES
GaAs INFRARED EMITTING DIODE
LED55B LED55C LED56
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME
ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HERE-
IN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical
implant into the body,or (b) support or sustain life,
and (c) whose failure to perform when properly
used in accordance with instructions for use provided
in labeling, can be reasonably expected to result in a
significant injury of the user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
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GaAs INFRARED EMITTING DIODE
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