LA-301 B / L Series
LED displays
Single Digit LED Numeric Display
LA-301 B / L Series
LA-301 B / L series is developed because of the demand
for small single digit LED Numeric Display. Materials of
emission are GaAsP on GaP, AlGalnP, GaP and GaN.
This is the height of a letter 8mm, single digit LED
Numeric Display that is packed by epoxy resin.
Dimensions
(Unit : mm)
7.0
10˚
1.0
Features
1) The height of a letter is 8mm.
2) The light don’t leak from the segment in spite of the
small package.
3) The package of surface color is black. Color of
segment is colored in emitting color. (Blue color is only
milky white)
4) Each color has anode common and cathode common
respectively.
0.5
+0.1
0
1.0
4.0
φ0.8
(5.3)
Selection guide
Emitting color
Common
Anode
Cathode
Red
LA-301VB
LA-301VL
Red
Orange
Yellow
(High brightness)
(High brightness) (High brightness)
LA-301AB
LA-301AL
LA-301EB
LA-301EL
LA-301XB
LA-301XL
3.8±0.5
0.25
+0.1
0
5.0
Tolerance are
±0.3
unless otherwise noted:
Green
LA-301MB
LA-301ML
Blue
LA-301BB
LA-301BL
Pin assignments
Pin No.
1
+
2
+
3
+
4
+
5
+
e
d
D.P
f
g
c
a
b
+
10
+
9
+
8
+
7
+
6
Pin No.
1
2
3
4
5
6
7
8
9
10
Function
Segment "a"
Segment "f"
Segment "g"
Segment "e"
Segment "d"
D.P Cathode
D.P Anode
Segment "c"
Common
Segment "b"
Equivalent circuit (anode common)
COM
9
7
(cathode common)
COM
9
7
a b c d e f g
1 10 8 5 4 2 3
D.P
6
a b c d e f g
1 10 8 5 4 2 3
D.P
6
Rev.C
(2.0)
(8.0)
11.0
8.0
1/4
LA-301 B / L Series
LED displays
Absolute maximum ratings
(Ta=25°C)
Parameter
Power dissipation
Power dissipation
Forward current
Peak forward current
Reverse voltage
Operating temperature
Storage temperature
∗1
Pulse width 1ms Duty 1 / 5
∗2
Pulse width 0.1ms Duty 1 / 10
Symbol
P
D
P
D
/ seg
I
F
I
FP
V
R
Topr
Tstg
Orange
Yellow
Red
Blue
Green
(High brightness)
(High brightness) (High brightness)
LA-301VB / VL LA-301AB / AL
LA-301EB / EL
LA-301XB / XL LA-301MB / ML LA-301BB / BL
480
336
320
520
520
520
60
42
40
65
65
65
20
10
15
25
25
25
∗1
∗2
∗2
∗2
∗1
60
50
∗2
60
50
50
50
5
5
5
5
5
5
−25
to
+75
−30
to
+85
Red
Unit
mW
mW
mA
mA
V
˚C
˚C
Electrical characteristics
(Ta=25°C)
Parameter
Forward voltage
Reverse current
Peak wavelength
Spectral line half width
Symbol
Conditions
Orange
Yellow
Red
(High brightness)
(High brightness) (High brightness)
Typ. Max. Typ.
Max.
Typ.
Max.
Typ.
Max.
∗
∗
∗
∗
∗
2.0 2.8
2.05
2.6
2.05
2.6
2.05
2.6
∗
100
100
100
100
−
−
−
−
∗
∗
∗
650
626
610
589
−
−
−
−
40
18
∗
17
∗
15
∗
−
−
−
−
Red
Green
Blue
Unit
V
F
I
R
λ
P
∆λ
I
F
=10mA
V
R
=3V
I
F
=10mA
I
F
=10mA
Typ. Max. Typ. Max.
2.1
2.8
3.6
4.2
100
100
−
−
563
470
−
−
40
26
−
−
V
µA
nm
nm
∗
Shows the number on the condition of I
F
=20mA.
The products are not radiations resistant.
Luminous intensity
Color
Red
Red (High brightness)
Orange (High brightness)
Yellow (High brightness)
Green
Blue
λ
P
(nm)
650
626
610
589
563
470
Type
LA-301VB
LA-301VL
LA-301AB
LA-301AL
LA-301EB
LA-301EL
LA-301XB
LA-301XL
LA-301MB
LA-301ML
LA-301BB
LA-301BL
Min.
3.6
36
36
36
3.6
14
Typ.
10
90
90
90
10
56
Unit
mcd
mcd
mcd
mcd
mcd
mcd
A condition of measurement is I
F
=10mA.
Rev.C
2/4
LA-301 B / L Series
LED displays
Electrical and optical characteristic curve
100
Ta=25°C
10.00
Relative Luminous Intensity
Forward Current:I
F
(mA)
10
1
LA-301BB
LA-301BL
LA-301XB
LA-301XL
LA-301EB
LA-301EL
LA-301AB
LA-301AL
LA-301MB
LA-301ML
LA-301VB
LA-301VL
Ta=25°C
1.00
0.10
LA-301BB
LA-301BL
LA-301XB
LA-301XL
LA-301EB
LA-301EL
LA-301AB
LA-301AL
LA-301MB
LA-301ML
LA-301VB
LA-301VL
0.1 1
2
3
4
5
0.01
1
10
Forward Current:I
F
(mA)
100
Forward Voltage:V
F
(V)
Fig.1 Forward Current - Forward Voltage
Fig.2 Relative Luminous Intensity - Forward Current
I
F
=10mA
1.4
Relative Luminous Intensity
1.2
1
0.8
0.6
0.4
-25 -15 -5
5
15 25 35 45 55 65 75
1
1
50kHz
LA-301BB
LA-301BL
LA-301XB
LA-301XL
LA-301EB
LA-301EL
LA-301AB
LA-301AL
LA-301MB
LA-301ML
LA-301VB
LA-301VL
IF peak Max.
Ratio of Maximum Tolerance Peak
IF Max.
Current to Maximum Tolerance DC Current
1.6
)
10
LA-301BB
LA-301BL
500Hz
200Hz
100Hz
10kHz
5kHz
2kHz
20kHz
1kHz
(
5
10
100
1000
10000
Case Temparature (°C)
Pulse Duration tw(µs)
Fig.3 Relative Luminous Intensity - Case Temperature
Fig.4 Ratio of Maximum Tolerable Peak Current - Pulse Duration (
Ι
)
)
IF peak Max.
Ratio of Maximum Tolerance Peak
IF Max.
Current to Maximum Tolerance DC Current
100kHz
LA-301XB
LA-301XL
LA-301EB
LA-301EL
LA-301AB
LA-301AL
I
F
peak Max.
Ratio of Maximum Tolerable peak
I
F
Max.
Current to Maximum Forward Current
10
)
10
LA-301MB
LA-301ML
(
(
300Hz
100Hz
30kHz
10kHz
500Hz
200Hz
100Hz
50kHz
20kHz
10kHz
5kHz
2kHz
1kHz
1
1
10
100
1000
10000
1
1
300kHz
10
100
1000
30Hz
3kHz
1kHz
10000
100000
Pulse Duration : Tw (µs)
Pulse Duration : tw(µs)
Fig.5 Ratio of Maximum Tolerable Peak Current - Pulse Duration (
ΙΙ
)
Fig.6 Ratio of Maximum Tolerable Peak Current - Pulse Duration (
ΙΙΙ
)
Rev.C
3/4
LA-301 B / L Series
LED displays
I
F
peak Max.
Ratio of Maximum Tolerable peak
I
F
Max.
Current to Maximum Forward Current
10
120%
)
LA-301VB
LA-301VL
500Hz
200Hz
100Hz
50kHz
20kHz
10kHz
100%
80%
60%
40%
20%
0%
-25 -15 -5
(
5kHz
2kHz
1kHz
1
1
Forward Current (%)
10
100
1000
10000
5 15 25 35 45 55 65 75 85
Ambient Temperature(°C)
Pulse Duration : tw(µs)
Fig.7 Ratio of Maximum Tolerable Peak Current - Pulse Duration (
ΙV
)
Fig.8 Derating
Rev.C
4/4
Appendix
Notes
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The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level
of reliability and the malfunction of which would directly endanger human life (such as medical
instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers
and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow
for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in
order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM
cannot be held responsible for any damages arising from the use of the products under conditions out of the
range of the specifications or due to non-compliance with the NOTES specified in this catalog.
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Appendix1-Rev2.0
