LED
Red LED
L7868 series
Small emission spot, red LED using current confined chip
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).
Features
L7868:
φ400 µm
L7868-01:
φ150 µm
l
Uniform emission pattern
l
Narrow directivity: L7868-02
Applications
l
Small emission spot
l
Optical switches
l
Automatic control system
s
Absolute maximum ratings (Ta=25 °C, unless otherwise noted)
Parameter
Symbol
Condition
Reverse voltage
V
4
Forward current
I
.
Forward current
-
Ta > 25 °C
derating rate
Pulse forward
Pulse width=10 µs
I
.2
current
Duty ratio=1 %
Pulse forward
-
Ta > 25 °C
current derating rate
Power dissipation
P
Operating
Topr
temperature
Storage temperature Tstg
Value
3
60
0.8
0.5
7
180
-30 to +85
-40 to +100
Unit
V
mA
mA/°C
A
mA/°C
mW
°C
°C
s
Electrical and optical characteristics (Ta=25 °C)
Parameter
Peak emission
wavelength
Spectral half width
(FWHM)
Radiant flux
Radiant illuminance
Forward voltage
Pulse forward
voltage
Reverse current
Rise time
Fall time
Symbol
lp
Dl
fe
P
-
V
.
V
.2
I
4
tr
tf
Condition
I
.
=20 mA
I
.
=20 mA
I
.
=20 mA
I
.
=20 mA
I
.
=20 mA
I
.
=0.5 A
V
4
=3 V
I
.
=20 mA,
10 % to 90 %
I
.
=20 mA,
90 % to 10 %
L7868
Min.
650
-
0.35
-
-
-
-
-
-
Typ.
670
20
0.45
0.1
1.9
4.3
-
0.06
0.06
Max.
700
-
-
-
2.2
5.5
10
0.1
0.1
Min.
650
-
0.15
-
-
-
-
-
-
L7868-01
Typ.
670
20
0.2
-
1.9
4.3
-
0.06
0.06
Max.
700
-
-
-
2.2
5.5
10
0.1
0.1
Min.
650
-
0.35
-
-
-
-
-
-
L7868-02
Typ.
670
20
0.45
0.4
1.9
4.3
-
0.06
0.06
Max.
700
-
-
-
2.2
5.5
10
0.1
0.1
Unit
nm
nm
mW
mW/cm
V
V
µA
µs
µs
1
HAMAMATSU [ HAMAMATSU CORPORATION ]
