Features
l
Small emission spot
L7868: φ400 µm
L7868-01: φ150 µm
l
Uniform emission pattern
l
Narrow directivity: L7868-02
Applications
l
Optical switches
l
Automatic control system
LED
Red LED
Small emission spot, red LED using current confined chip
L7868 series
L7868/-02 are red LEDs with a microball lens bonded to the current-confined structure chip surface. L7868-01 uses the same structure LED chip
with no microball lens and provides a smaller emission spot of φ150 µm. L7868-02 uses a glass lens window for even narrower directivity (beam
spread).
1
■ Absolute maximum ratings (Ta=25 °C, unless otherwise noted)
Parameter Symbol Condition Value Unit
Reverse voltage V43V
Forward current I.60 mA
Forward current
derating rate - Ta > 25 °C 0.8 mA/°C
Pulse forward
current I.2 Pulse width=10 µs
Duty ratio=1 % 0.5 A
Pulse forward
current derating rate - Ta > 25 °C 7 mA/°C
Power dissipation P180 mW
Operating
temperature Topr -30 to +85 °C
Storage temperature Tstg -40 to +100 °C
■ Electrical and optical characteristics (Ta=25 °C)
L7868 L7868-01 L7868-02
Parameter S
y
mbol Condition Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
Peak emission
wavelength lpI.=20 mA 650 670 700 650 670 700 650 670 700 nm
Spectral half width
(FWHM) Dl I.=20 mA -20 - - 20 - - 20 -nm
Radiant flux feI.=20 mA 0.35 0.45 - 0.15 0.2 - 0.35 0.45 - mW
Radiant illuminance P-I.=20 mA -0.1 -----0.4 -mW/cm
Forward voltage V.I.=20 mA - 1.9 2.2 - 1.9 2.2 - 1.9 2.2 V
Pulse forward
voltage V.2 I.=0.5 A -4.3 5.5 -4.3 5.5 -4.3 5.5 V
Reverse current I4V4=3 V - - 10 - - 10 - - 10 µA
Rise time tr I.=20 mA,
10 % to 90 % -0.06 0.1 -0.06 0.1 -0.06 0.1 µs
Fall time tf I.=20 mA,
90 % to 10 % - 0.06 0.1 - 0.06 0.1 - 0.06 0.1 µs
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Higashi-ku, Hamamatsu City, 435-8558 Japan, Telephone: (81) 53-434-3311, Fax: (81) 53-434-5184, http://www.hamamatsu.com
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone: (1) 908-231-0960, Fax: (1) 908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49) 08152-3750, Fax: (49) 08152-2658
France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33-(1) 69 53 71 00, Fax: 33-(1) 69 53 71 10
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44) 1707-294888, Fax: (44) 1707-325777
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: (46) 8-509-031-00, Fax: (46) 8-509-031-01
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39) 02-935-81-733, Fax: (39) 02-935-81-741
Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2001 Hamamatsu Photonics K.K.
Red LED
L7868 series
Cat. No. KLED1038E01
Dec. 2001 DN
5.4 ± 0.2
4.7 ± 0.1
3.0 ± 0.1
3.6 ± 0.2
13.5
2.54 ± 0.2
COMMON TO CASE
0.45
LEAD
GLASS
WINDOW
4.65 ± 0.1
4.5 ± 0.2
6.65 ± 0.213.5
5.4 ± 0.2
2.54 ± 0.2
COMMON TO CASE
0.45
LEAD
■ Radiant flux vs. forward current
■ Directivity ■ Radiant output vs. ambient
temperature
KLEDB0238EA KLEDB0242EA
■ Emission spectrum
2
10 100
(Typ. Ta=25 ˚
C, tw=100 µs, 0.1 %
)
1000
0.1
1
10
100
FORWARD CURRENT (mA)
RADIANT FLUX (mW)
L7868-01
L7868/-02
■ Forward current vs. forward voltage
1234
(Typ.Ta=25 ˚C, tw=100 µs, 0.1 %)
5
1
10
100
1000
FORWARD VOLTAGE (V)
FORWARD CURRENT (mA)
KLEDB0243EA
KLEDB0244EA KLEDB0245EA KLEDB0027EB
■ Allowable forward current vs.
ambient temperature
■ Allowable forward current vs.
duty ratio ■ ■
■ ■
■ Dimensional outlines (unit: mm)
KLEDB0246EA
KLEDA0075EA
RELATIVE RADIANT OUTPUT (%)
(Typ. Ta=25 ˚C)
20˚10˚10˚20˚
90˚
80˚
50˚
40˚
30˚
70˚
60˚
90˚
80˚
50˚
40˚
30˚
70˚
60˚
L7868
L7868-02
L7868-01
20 %
40 %
60 %
80 %
100 %
-40 -20 0 20
(Typ.)
40 60 80 100
0
40
60
80
100
AMBIENT TEMPERATURE (˚C)
RELATIVE ALLOWABLE FORWARD CURRENT (%)
20
0.01
DUTY RATIO (%)
ALLOWABLE FORWARD CURRENT (A)
0.01
0.1 1 10 100
0.1
1
10
(Typ.
Ta=25
˚C)
PULSE WIDTH=1 µs
PULSE WIDTH=100 µs
PULSE WIDTH=10 µs
-40 -20 40 100020 6080
+3
-1
+2
-2
+1
0
-3
-4
-5
(Typ. I
F
=50 mA)
AMBIENT TEMPERATURE (˚C)
RELATIVE RADIANT OUTPUT (dB)
KLEDA0076EA
600 650 700 750
(Typ. Ta=25 ˚
C,
I
F
=20 mA)
800
0
20
40
60
80
100
WAVELENGTH (µm)
RELATIVE RADIANT OUTPUT (%)
L7868/-01 L7868-02
