ROHM LB

LB-403F1 Series
LED displays
High efficiency, three-digit numeric
displays
LB-403F1 Series
!External dimensions (Units : mm)
The LB-403 F1 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 10 mm.
26.0±0.4
6.75
9.0
φ0.5
(2.54)
3.0±0.5
8.0
φ0.5
1.0
5.5
!Features
1) Height of character : 10mm.
2) Common anode configuration available for
each color.
3) High efficiency reflectors are used to
achieve a bright, clear display.
4) The package surface is painted black and
the segments are colored the display color.
(22.86)
Tolerances are ±0.3 unless otherwise noted:
!Selection guide
Emitting color
Red
Green
LB-403VF1
LB-403MF1
Common
Anode
!Pin assignments
20 19 18 17 16 15 14 13 12 11
+ + + + + + + + + +
a2
b1
c1
Digit 1
a3
f2
g2
e2
d2
b2
f3
g3
c2
b3
e3
d3
Digit 2
c3
Digit 3
+
+
+
+
+
+
+
+
+
+
Pin No. 1
2
3
4
5
6
7
8
9
10
(12.5)
10.0
16.0
1.0
10°
Pin No.
Function
Pin No.
Function
1
2
3
4
5
6
7
8
9
10
Segment "c1"
Segment "e2"
Segment "d2"
Segment "g2"
Segment "c2"
Segment "e3"
Segment "d3"
Segment "g3"
Segment "c3"
NC
11
12
13
14
15
16
17
18
19
20
Segment "b3"
Segment "a3"
Segment "f3"
Digit 3 Common
Digit 2 Common
Segment "b2"
Segment "a2"
Segment "f2"
Segment "b1"
Digit 1 Common
LB-403F1 Series
LED displays
!Internal circuit schematic (example of common anode)
Dig.1
20
COM
b1 c1
19 1
Dig.2
15
Dig.3
14
COM
COM
a3 b3 c3 d3 e3 f3 g3
12 11 9 7 6 13 8
a2 b2 c2 d2 e2 f2 g2
17 16 5 3 2 18 4
!Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Red
Green
LB-403VF1
LB-403MF1
Unit
Power dissipation
PD
640
640
mW
Power dissipation
PD / seg
40
40
mW
Forward current
IF
15
15
mA
Peak forward current
IFP
60∗
60∗
mA
Reverse voltage
VR
3
3
V
Operating temperature
Topr
−25~+75
°C
Storage temperature
Tstg
−30~+85
°C
∗ Pulse width 1ms duty 1 / 5
! Electrical and optical characteristics (Ta = 25°C)
Parameter
Symbol Conditions
Red
Green
Min. Typ. Max. Min. Typ. Max.
Unit
Forward voltage
VF
IF = 10mA
−
2.0
2.8
−
2.1
2.8
V
Reverse current
IR
VR = 3V
−
−
100
−
−
100
µA
Peak wavelength
λP
IF = 10mA
−
650
−
−
563
−
nm
Spectral line half
width
∆λ
IF = 10mA
−
40
−
−
40
−
nm
Not designed for radiation resistance.
! Luminous intensity
λP
Color
Type
Min.
Typ.
Max.
Unit
Red
650
LB-403VF1
2.2
6.3
−
mcd
Green
563
LB-403MF1
5.6
16
−
mcd
Note : Measured at IF = 10mA