9-78
10.16 57 Single Color &
Multicolor Dot Matrix LED Displays
LTP-4057A/4157A
4257AA/4357AA Series
Package Dimensions
A. LTP-4057A/4157A
Features
4.0 inch (101.6mm) matrix height.
Low power requirement.
Single plane, wide viewing angle.
57 array with X-Y select.
Compatible with usascll and ebcdic codes.
Stackable vertically and horizontally.
Choices of Two matrix orientation.
Cathode row or cathode column.
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-4X57A series are 2.0 inch (50.80mm)matrix
height 5 7 dot matrix displays.
The LTP-4257AA/4357AA are multicolor applicable
displays.
The multicolor displays have gray face and white dots.
The LTP-4057A/4157A series are single color displays.
The green, red orange displays have gray face and
white dot color.
The AlGaAs red devices have red face and white dots.
The green series devices utilize LED chipse which are
made from GaP on a transparent GaP substrate.
The 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.
Notes : All dimensions are in millimeters(inches).
Tolerance : 0.25mm (0.01") unless otherwise
noted.
Devices
B. LTP-4257AA/4357AA
Part No. LTP- Package
Dimension
Red
Orange Anode Column, Cathode Row
Cathode Column, Anode Row
Anode Column, Cathode Row
Cathode Column, Cathode Row
4057AE
4157AE
Multi
Color
4257AA
4357AA
Green
4057AG
4157AG
Internal
Circuit
Diagram
Description
A
B
C
D
A
A
B
B
AlGaAs
Red
4057AC
4157AC
Yellow
4057AY
4157AY
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DISPLAYS
Pin Connection
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A. LTP-4057A
Cathode Row 5
Cathode Row 7
Anode Column 2
Anode Column 3
Cathode Row 4
Anode Column 5
Cathode Row 6
Cathode Row 3
Cathode Row 1
Anode Column 4
Anode Column 3
Cathode Row 4
Anode Column 1
Cathode Row 2
Connection
B. LTP-4157A
Anode Row 5
Anode Row 7
Cathode Column 2
Cathode Column 3
Anode Row 4
Cathode Column 5
Anode Row 6
Anode Row 3
Anode Row 1
Cathode Column 4
Cathode Column 3
Anode Row 4
Cathode Column 1
Anode Row 2
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
C. LTP-4257AA
Anode Column 1 Green
Anode Column 1 Red Orange
Cathode Row 7 Green
Cathode Row 7 Red Orange
Anode Column 2 Green
Anode Column 2 Red Orange
Anode Column 3 Green
Anode Column 3 Red Orange
Cathode Row 5 Green
Cathode Row 5 Red Orange
Cathode Row 4 Green
Cathode Row 4 Red Orange
Cathode Row 6 Green
Cathode Row 6 Red Orange
Anode Column 5 Green
Anode Column 5 Red Orange
Cathode Row 1 Green
Cathode Row 1 Red Orange
Anode Column 4 Green
Anode Column 4 Red Orange
Anode Column 3 Green
Anode Column 3 Red Orange
Cathode Row 3 Green
Cathode Row 3 Red Orange
Cathode Row 4 Green
Cathode Row 4 Red Orange
Cathode Row 2 Green
Cathode Row 2 Red Orange
Connection
D. LTP-4357AA
Cathode Column 1 Green
Cathode Column 1 Red Orange
Anode Row 7 Green
Anode Row 7 Red Orange
Cathode Column 2 Green
Cathode Column 2 Red Orange
Cathode Column 3 Green
Cathode Column 3 Red Orange
Anode Row 5 Green
Anode Row 5 Red Orange
Anode Row 4 Green
Anode Row 4 Red Orange
Anode Row 6 Green
Anode Row 6 Red Orange
Cathode Column 5 Green
Cathode Column 5 Red Orange
Anode Row 1 Green
Anode Row 1 Red Orange
Cathode Column 4 Green
Cathode Column 4 Red Orange
Cathode Column 3 Green
Cathode Column 3 Red Orange
Anode Row 3 Green
Anode Row 3 Red Orange
Anode Row 4 Green
Anode Row 4 Red Orange
Anode Row 2 Green
Anode Row 2 Red Orange
9-80
Internal Circuit Diagrams
A. LTP-4057A B. LTP-4157A
Note : The Sign " " Stands For 2 Chips in Series.
C. LTP-4257AA D. LTP-4357AA
Absolute Maximum Ratings at Ta=25
Notes : The Sign " " stands for Green color 2 chips sceries.
The Sign " " stands for Red Orange color 2 chips sceries.
Parameter
Average Power Dissipation Per Dot
Solder Temperature 1/16 Inch Below Seating Plane for 3 Seconds at 260
-35 to +85
-35 to +85
Green Red
Orange AlGaAs Red
64
Unit
mW
Yellow
Peak Forward Current Per Dot
(1/10 Duty Cycle, 0.1ms Pulse Width)
Average Forward Current Per Dot
Derating Linear from 25 Per Dot
Reverse Voltage Per Dot
Operating Temperature Range
Storage Temperature Range
90
11
0.15
10
60
80
8
0.11
10
64
90
11
0.15
10
64
110
14
0.19
10
mA
mA
mA/
V
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DISPLAYS
Electrical/Optical Characteristics at Ta=25
LTP-4057AG/4157AG & LTP-4257AA/4357AA (Green)
LTP-4057AY/4157AY
LTP-4057AE/4157AE & LTP-4257AA/4357AA (Red Orange)
Note: Luminous intensity is measured with a light sensor and filter combination that approximates the CIE (Commision
Internationale De L’Eclairage) eye-response curve.
LTP-4057AC/4157AC
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, any Dot
Reverse Current, any Dot
Symbol
IV
P
d
VF
IR
Min.
3000
Typ.
9600
565
30
569
4.2
6
Max.
5.2
7.4
100
Unit Test
Condition
IP=80mA
1/16 Duty
IF=20mA
IF=20mA
IF=20mA
IF=20mA
IF=80mA
VR=10V
cd
nm
nm
nm
V
VA
IV-m 2:1 IP=80mA
1/16 Duty
Luminous Intensity Matching Ratio
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, any Dot
Reverse Current, any Dot
Symbol
IV
P
d
VF
IR
Min.
3000
Typ.
9600
585
35
588
4.2
6.0
Max.
5.2
7.4
100
Unit Test
Condition
IP=80mA
1/16 Duty
IF=20mA
IF=20mA
IF=20mA
IF=20mA
IF=80mA
VR=10V
cd
nm
nm
nm
V
VA
IV-m 2:1 IP=80mA
1/16 Duty
Luminous Intensity Matching Ratio
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, any Dot
Reverse Current, any Dot
Symbol
IV
P
d
VF
IR
Min.
3000
Typ.
9600
630
40
621
4
5.2
Max.
5.2
6.8
100
Unit Test
Condition
IP=80mA
1/16 Duty
IF=20mA
IF=20mA
IF=20mA
IF=20mA
IF=80mA
VR=10V
cd
nm
nm
nm
V
VA
IV-m 2:1 IP=80mA
1/16 Duty
Luminous Intensity Matching Ratio
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, any Dot
Reverse Current, any Dot
Symbol
IV
P
d
VF
IR
Min.
11600
Typ.
20000
660
35
638
3.6
4
Max.
4.8
6.2
100
Unit Test
Condition
IP=80mA
1/16 Duty
IF=20mA
IF=20mA
IF=20mA
IF=20mA
IF=80mA
VR=10V
cd
nm
nm
nm
V
VA
IV-m 2:1 IP=80mA
1/16 Duty
Luminous Intensity Matching Ratio
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Typical Electrical/Optical Characteristic Curves
(25 Ambient Temperatrue Unless Otherwise Noted)
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