9-36
Light Bars
LTL-2000 Series
Features
Rectangular light bar.
Choices of three bright colors-green/yellow/high efficiency red.
Large, bright, uniform light emitting areas.
Low power requirement.
Excellent ON-OFF contrast.
Can be used with panel and legend mount.
Easy mounting on P.C. board.
Categorized for light output.
Yellow and green categorized for dominant wavelength.
Description
The LTL-2300/2400/2500/2600/2700/2800 series light bars are rectangular light sources designed for a variety of
applications where a large bright source of light is required. These light bars are configured in single-in-line and dual-
in-line packages. The green series devices utilize LED chips which are made from GaP on a transparent GaP
substrate. The yellow and high efficiency red series devices utilize LED chips which are made trom GaAsP on a
transparent GaP substrate. All devices have white bar.
Devices
Part No. Package
Dimension
Yellow
8.89mm 3.81mm(.350 in .150 in.)
19mm 3.76mm(.748 in .148 in.)
8.89mm 3.81mm(.350 in .150 in.)
8.89mm 8.89mm(.350 in .350 in.)
8.89mm 3.81mm(.350 in .150 in.)
8.89mm 19.05mm(.350 in .750 in.)
2400Y
2450Y
2700Y
2755Y
2720Y
2785Y
Hi. Eff.
Red
2300HR
2350HR
2600HR
2655HR
2620HR
2685HR
Green
2500G
2550G
2800G
2855G
2820G
2885G
Internal
Circuit Diagram
Size of Light Emitting Areas
A
B
C
D
E
F
A
B
C
D
E
F
Package Dimensions
A. LTL-2300/2400/2500 B. LTL-2350/2450/2550
9-37
DISPLAYS
C. LTL-2600/2700/2800 D. LTL-2655/2755/2855
A LTL-2300/2400/2500 B LTL-2350/2450/2550
Cathode A
Anode A
Cathode B
Anode B
Cathode C
Anode C
Cathode D
Anode D
Pin
No.
1
2
3
4
5
6
7
8
Connection
Cathode A
Anode A
Cathode B
Anode B
C LTL-2600/2700/2800
Cathode A
Anode A
Anode B
Cathode B
Cathode C
Anode C
Anode D
Cathode D
D LTL-2655/2755/2855
Cathode A
Anode A
Anode B
Cathode B
Cathode C
Anode C
Anode D
Cathode D
E. LTL-2620/2720/2820 F. LTL-2685/2785/2885
Notes : All dimensions are in millimeters (inches). Tolerance: 0.25mm (0.010") unless otherwise noted.
Pin Connection
9-38
Internal Circuit Diagrams
A. LTL-2300/2400/2500 B. LTL-2350/2450/2550 C. LTL-2600/2700/2800
E. LTL-2620/2720/2820
Cathode A
Anode A
Anode B
Cathode B
Cathode C
Anode C
Anode D
Cathode D
Cathode E
Anode E
Anode F
Cathode F
Cathode G
Anode G
Anode H
Cathode H
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Connection
F. LTL-2685/2785/2885
Cathode A
Anode A
Anode B
Cathode B
Cathode C
Anode C
Anode D
Cathode D
Cathode E
Anode E
Anode F
Cathode F
Cathode G
Anode G
Anode H
Cathode H
D. LTL-2655/2755/2855 E. LTL-2620/2720/2820 F. LTL-2685/2785/2885
Absolute Maximum Ratings at Ta=25
Parameter
Power Dissipation Per Chip
Peak Forward Current Per Chip
(1/10 Duty Cycle, 0.1ms Pulse Width)
Continuous Forward Current Per Chip
Derating Linear from 25 Per Chip
Reverse Voltage Per Chip
Operating Temperature Range
Storage Temperature Range
Solder Temperature 1/16 Inch Below Seating Plane for 3 Seconds at 260
Green Yellow Hi.- Eff. Red
75
100
25
0.33
5
60
80
20
0.27
5
75
100
25
0.33
5
Unit
mW
mA
mA
mA/
V
-35 to +85
-35 to +85
9-39
DISPLAYS
Parameter
Average Luminous
Intensity Per Bar
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, and Bar
Reverse Current, and Bar
Symbol
IV
P
d
VF
IR
Min.
1.4
3.5
1.4
1.4
3.5
7
Typ.
4.2
8
4.2
4.2
8
16
635
40
623
2.0
Max.
2.6
100
Unit Test
Condition
IF=10mA
IF=20mA
IF=20mA
IF=20mA
IF=20mA
VR=5V
mcd
nm
nm
nm
V
A
Electrical/Optical Characteristics at Ta=25
Hi.-Eff Red LTL-2300HR/2600HR
Yellow LTL-2400Y/2700Y
LTL-
2300
2350
2600
2620
2655
2685
Parameter
Average Luminous
Intensity Per Bar
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, and Chip
Reverse Current, and Chip
Symbol
IV
P
d
VF
IR
Min.
1.4
3.5
1.4
1.4
3.5
7
Typ.
4.2
8
4.2
4.2
8
16
585
35
588
2.1
Max.
2.6
100
Unit Test
Condition
IF=10mA
IF=20mA
IF=20mA
IF=20mA
IF=20mA
VR=5V
mcd
nm
nm
nm
V
A
LTL-
2400
2450
2700
2720
2755
2785
Parameter
Average Luminous
Intensity Per Bar
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, and Chip
Reverse Current, and Chip
Symbol
IV
P
d
VF
IR
Min.
1.4
3.5
1.4
1.4
3.5
7
Typ.
4.2
8
4.2
4.2
8
16
565
30
569
2.1
Max.
2.6
100
Unit Test
Condition
IF=10mA
IF=20mA
IF=20mA
IF=20mA
IF=20mA
VR=5V
mcd
nm
nm
nm
V
A
LTL-
2500
2550
2800
2820
2855
2885
Green LTL-2500G/2800G
Notes: 1.Clean only in water, isopropanol,ethanol,freon TF (or equivalent).
2.Luminous intensity is measured with a light sensor and filter combination that approximates the CIE
(Commision Internationale De L’Eclairage)eye-response curve.
9-40
Typical Electrical/Optical Characteristic Curves
(25 Ambient Temperature Unless Otherwise Noted)
