9-48
Package Dimensions
A. LTP-2344
B. LTP-2844A3
Series
9 4 4 Single Color & Multicolor
Dot Matrix LED Displays
LTP-2344
2844A3
Features
2.0 inch (50.80mm) matrix height.
Low power requirement.
Single plane, wide viewing angle.
Solid state reliability.
44 array with X-Y select.
Compatible with usascll and ebcdic codes.
Stackable horizontally.
Choices of two matrix orientation.
Easy mounting on P.C. board.
Categorized for luminous intensity.
Single color displays have the choices of four bright
colors-green/yellow/red orange/AlGaAs red.
Multicolor displays are applicable to three bright colors
: green, red orange and yellow (green and red orange
mixed)
Description
The LTP-2X44 series are 2.0 inch (50.80mm)matrix height
44 dot matrix displays.
The LTP-2844A3 are multicolor applicable displays.
The multicolor displays have gray face and white dots.
The LTP-2344 series are single color displays. The
yellow,green and red orange displays have gray face
and white dot color. The AlGaAs red devices have red
face and red dots.
The green series devices utilize LED chipse which are
made from GaP on a transparent GaP substrate.
The yellow and red orange series devices utilize LED
chips which are made from GaAsP on a transparent GaP
substrate.
The AlGaAs red series devices utilize LED chips which
are made from AIGaAs on a non-transparent GaAs
substrate.
Part No. Package
Dimension
Red
Orange
Anode Row, Cathode Column
Anode Row, Cathode Column
2344E
-
Multi
Color
-
2844A3
Green
2344G
-
Internal
Circuit
Diagram
Description
A
B
A
B
Notes : All dimensions are in millimeters(inches).
Tolerance : 0.25mm (0.01") unless otherwise
noted.
Devices
AlGaAs
Red
2344C
-
Yellow
2344Y
-
9-49
DISPLAYS
Pin Connection
A. LTP-2344
Cathode Column 1
Cathode Column 2
Cathode Column 3
Cathode Column 4
Anode Row 1
Anode Row 2
Anode Row 3
Anode Row 4
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Connection
B. LTP-2844A3
Cathode Column 1 Red Orange
Cathode Column 1 Green
Cathode Column 2 Red Orange
Cathode Column 2 Green
Cathode Column 3 Red Orange
Cathode Column 3 Green
Cathode Column 4 Red Orange
Cathode Column 4 Green
Anode Row 1 Red Orange
Anode Row 1 Green
Anode Row 2 Red Orange
Anode Row 2 Green
Anode Row 3 Red Orange
Anode Row 3 Green
Anode Row 4 Red Orange
Anode Row 4 Green
Internal Circuit Diagrams
A. LTP-2344 B. LTP-2844A3
Absolute Maximum Ratings at Ta=25
Parameter
Average Power Dissipation Per Dot
Peak Forward Current Per Dot
Average Forward Current Per Dot
Derating Linear from 25 Per Dot
Reverse Voltage Per Dot
Operating Temperature Range
Storage Temperature Range
Solder Temperature 1/16 Inch Below Seating Plane for 3 Seconds at 260
Green Yellow AlGaAs Red
96
90
11
0.15
15
92
80
8
0.08
15
96
110
14
0.19
15
Unit
mW
mA
mA
mA/
V
-35 to +85
-35 to +85
Red
Orange
96
90
11
0.15
15
9-50
Electrical/Optical Characteristics at Ta=25
LTP-2344G/2844A3 (Green)
LTP-2344E/2844A3 (Red Orange)
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, any Dot
Reverse Current, any Dot
Luminous Intensity Matching Ratio
Symbol
IV
P
d
VF
IR
IV-m
Min.
5.0
Typ.
11.0
630
40
621
6.0
7.8
Max.
7.8
10.2
100
2:1
Unit Test
Condition
IP=80mA
1/16 Duty
IF=20mA
IF=20mA
IF=20mA
IF=20mA
IF=80mA
VR=15V
IF=10mA
m cd
nm
nm
nm
V
V
A
LTP-2344C
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, and Dot
Reverse Current, and Chip
Luminous Intensity Matching Ratio
Symbol
IV
P
d
VF
IR
IV-m
Min.
15.1
Typ.
28
660
35
638
5.4
6
Max.
7.2
8.1
100
2:1
Unit Test
Condition
IP=80mA
1/16 Duty
IF=20mA
IF=20mA
IF=20mA
IF=20mA
IF=80mA
VR=15V
IF=10mA
m cd
nm
nm
nm
V
V
A
Note: Luminous intensity is measured with a light sensor and filter combination that approximates the CIE (Commision
Internationale De L’Eclairage) eye-response curve.
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, any Dot
Reverse Current, any Dot
Luminous Intensity Matching Ratio
Symbol
IV
P
d
VF
IR
IV-m
Min.
5.0
Typ.
11.0
565
30
569
6.3
9
Max.
7.8
11.1
100
2:1
Unit Test
Condition
IP=80mA
1/16 Duty
IF=20mA
IF=20mA
IF=20mA
IF=20mA
IF=80mA
VR=15V
IF=10mA
m cd
nm
nm
nm
V
V
A
LTP-2344Y
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, any Dot
Reverse Current, any Dot
Luminous Intensity Matching Ratio
Symbol
IV
P
d
VF
IR
IV-m
Min.
5.0
Typ.
11.0
585
35
588
6.0
7.8
Max.
7.8
10.2
100
2:1
Unit Test
Condition
IP=80mA
1/16 Duty
IF=20mA
IF=20mA
IF=20mA
IF=20mA
IF=80mA
VR=15V
IF=10mA
m cd
nm
nm
nm
V
V
A
9-51
DISPLAYS
Typical Electrical/Optical Characteristic Curves
(25 Ambient Temperatrue Unless Otherwise Noted)
