High efficiency, three-digit numeric displays
LB-303AK Series
The LB-303AK series were designed to meet the need for multi-digit numeric displays. These LED numeric displays use GaAsP
on GaP for the emitting material (with the exception of green) and are housed in an epoxy resin package. They are three-digit
displays with a character height of 8.0 mm.
Dimensions (Unit : mm)
22.0
7.0
7.0
1.0
3- φ 0.9
(9.2)
φ 0.5
1.0
10°
8.0
13.0
Features
1) Height of character : 8.0 mm
2) High efficiency in a compact package.
3) Common anode and common cathode
configurations are available for red and green.
4) The package surface is painted black and
the segments are colored the display color.
φ 0.5
(2.54)
(12.7)
5.0±0.5
5.0
4.0
Tolerances are ±0.3 unless otherwise noted:
Selection guide
Emitting color
Red
Green
Anode
LB-303VA
LB-303MA
Cathode
LB-303VK
LB-303MK
Common
Pin assignments
11
10
9
8
7
+
+
+
a
+
+
a
f
e
b
g
c
d
1
b
g
e
Digit 1 D.P1
+
+
Pin No.
f
a
c
d
f
e
b
g
d
c
Digit 2 D.P2 Digit 3 D.P3
+
+
+
+
2
3
4
5
6
www.rohm.com
c 2011 ROHM Co., Ltd. All rights reserved.
○
Pin No.
Function
1
2
3
4
5
6
7
8
9
10
11
Segment "c"
Digit 1 Common
Segment "d"
Digit 2 Common
Digit 3 Common
Segment D.P
Segment "b"
Segment "f"
Segment "a"
Segment "e"
Segment "g"
1/3
2011.04 - Rev.C
LB-303AK Series
Data Sheet
Internal circuit schematic (example of common anode)
a
9
b
7
c
1
d
3
e
10
f
8
g D.P
11 6
2 Dig.1
4 Dig.2
5 Dig.3
Absolute maximum ratings (Ta = 25C)
Parameter
Symbol
Red
Green
LB-303VA / VK
LB-303MA / MK
Unit
Power dissipation
PD
960
1440
mW
Power dissipation
PD / seg
40
60
mW
Forward current
IF
15
20
mA
Peak forward current
IFP
60∗
60∗
mA
VR
3
Reverse voltage
V
3
Operating temperature
Topr
−25 to +75
°C
Storage temperature
Tstg
−30 to +85
°C
∗ Pulse width 1ms duty 1 / 5
 Electrical and optical characteristics (Ta = 25C)
Parameter
Symbol Conditions
Forward voltage
VF
Red
Green
Min. Typ. Max. Min. Typ. Max.
IF = 10mA
−
2.0
2.8
−
2.1
2.8
Unit
V
Reverse current
IR
VR = 3V
−
−
100
−
−
100
μA
Peak wavelength
λP
IF = 10mA
−
650
−
−
563
−
nm
Spectral line half width
Δλ
IF = 10mA
−
40
−
−
40
−
nm
Not designed for radiation resistance.
 Luminous intensity
Color
Red
λP
650
Type
LB-303VA
Min.
Typ.
Max.
Unit
1.4
4.0
−
mcd
2.2
6.3
−
mcd
LB-303VK
LB-303MA
Green
563
LB-303MK
Note : Measured at IF = 10mA
www.rohm.com
c 2011 ROHM Co., Ltd. All rights reserved.
○
2/3
2011.04 - Rev.C
LB-303AK Series
Data Sheet
Electrical and optical characteristic curves
10.00
Ta=25°C
LB-303MA
LB-303MK
LB-303VA
LB-303VK
Relative Luminous Intensity
Forward Current:IF(mA)
100
10
1
0.1
1
1.5
2
2.5
1.00
0.10
0.01
3
Ta=25°C
1
10
100
Forward Current:IF(mA)
Fig.1 Forward Current - Forward Voltage
Fig.2 Relative Luminous Intensity - Forward Current
)
Forward Voltage:VF(V)
IF peak Max.
Ratio of Maximum Tolerable peak
IF Max.
Current to Maximum Forward Current
1.6
IF=10mA
LB-303MA
LB-303MK
0.8
0.6
0.4
-25 -15 -5
5
15 25 35 45 55 65 75
1
1
30Hz
300Hz
1kHz
3kHz
100Hz
1000
10000
100000
120%
10
100%
Forward Current (%)
100Hz
200Hz
500Hz
1kHz
2kHz
5kHz
50kHz
10kHz
LB-303VA
LB-303VK
20kHz
)
100
Fig.4 Ratio of Maximum Tolerable Peak Current - Pulse Duration ( Ι )
Fig.3 Relative Luminous Intensity - Case Temperature
(
10
Pulse Duration : tw(µs)
Case Temparature (°C)
IF peak Max.
Ratio of Maximum Tolerable peak
IF Max.
Current to Maximum Forward Current
10kHz
30kHz
1
300kHz
1.2
100kHz
(
Relative Luminous Intensity
1.4
10
80%
60%
40%
20%
1
1
10
100
1000
0%
-25 -15 -5
10000
Pulse Duration : tw(µs)
Fig.5 Ratio of Maximum Tolerable Peak Current - Pulse Duration ( ΙΙ )
www.rohm.com
c 2011 ROHM Co., Ltd. All rights reserved.
○
5 15 25 35 45 55 65 75 85
Ambient Temperature(°C)
Fig.6 Derating
3/3
2011.04 - Rev.C
Notice
Notes
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
R1120A
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
ROHM Semiconductor:
LB-303MA LB-303MK LB-303VA LB-303VK