7.62 5 7 Single Color &
Multicolor Dot Matrix LED Displays
LTP-3057A/3157A
3257AA/3357AA
Features
3.0 inch (76.2mm) matrix height.
Low power requirement.
Single plane, wide viewing angle.
5 7 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)
Series
Package Dimensions
A. LTP-3057A/3157A
Description
The LTP-3X57A series are 3.0 inch (76.2mm)matrix
height 5 7 dot matrix displays.
The LTP-3257AA/3357AA are multicolor applicable
displays. The multicolor displays have gray face and
white dots.
The LTP-3057A/3157A series are single color displays.
The green, yellow, red orange and AlGaAs red displays
have gray face and white dots.
The green series devices utilize LED chips 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.
B. LTP-3257AA/3357AA
Notes : All dimensions are in millimeters(inches).
Tolerance :
0.25mm (0.01") unless otherwise
noted.
Devices
Part No. LTP-
Green
3057AG
3157AG
Yellow
3057AY
3157AY
Red
Orange
3057AE
3157AE
AlGaAs
Red
3057AC
3157AC
Multi
Color
Description
Package
Dimension
A
A
B
B
Internal
Circuit
Diagram
A
B
C
D
Anode Column, Cathode Row
Cathode Column, Anode Row
3257AA
3357AA
Anode Column, Cathode Row
Cathode Column, Anode Row
9-73
DISPLAYS
Pin Connection
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Connection
LTP-3157A
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
No Connection
No Connection
Cathode Column 1
Anode Row 2
LTP-3057A
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
No Connection
No Connection
Anode Column 1
Cathode 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
Connection
LTP-3257AA
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
LTP-3357AA
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
9-74
Internal Circuit Diagrams
A. LTP-3057A
B. LTP-3157A
Notes : The Sign "
C. LTP-3257AA
" stands for two chips in series.
D. LTP-3357AA
Notes : The Sign "
The Sign "
" stands for Green color chips. (Two Chips In Series).
" stands for Red Orange color chips. (Two Chips In Series)
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
64
90
11
0.15
10
Yellow
60
80
8
0.08
10
-35
-35
Red
Orange
64
90
11
0.15
10
to +85
to +85
AlGaAs Red
64
110
14
0.19
10
Unit
mW
mA
mA
mA/
V
9-75
DISPLAYS
Electrical/Optical Characteristics at Ta=25
LTP-3057AG/3157AG & LTP-3257AA/3357AA (Green)
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
d
V
F
I
R
I
V
-m
Symbol
I
V
P
Min.
3000
Typ.
9600
565
30
569
4.2
6.0
Max.
Unit
cd
nm
nm
nm
Test
Condition
I
P
=80mA
1/16 Duty
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=80mA
V
R
=10V
I
F
=10mA
5.2
7.4
100
2:1
V
V
A
LTP-3057AY/3157AY
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
d
V
F
I
R
I
V
-m
Symbol
I
V
P
Min.
3000
Typ.
9600
585
35
588
4.2
6.0
Max.
Unit
cd
nm
nm
nm
Test
Condition
I
P
=80mA
1/16 Duty
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=80mA
V
R
=10V
I
F
=10mA
5.2
7.4
100
2:1
V
V
A
LTP-3057AE/3157AE & LTP-3257AA/3357AA (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
d
V
F
I
R
I
V
-m
Symbol
I
V
P
Min.
3000
Typ.
9600
630
40
621
4
5.2
Max.
Unit
cd
nm
nm
nm
Test
Condition
I
P
=80mA
1/16 Duty
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=80mA
V
R
=10V
I
F
=10mA
5.2
6.8
100
2:1
V
V
A
LTP-3057AC/3157AC
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
d
V
F
I
R
I
V
-m
Symbol
I
V
P
Min.
11500
Typ.
20000
660
35
638
3.6
4
Max.
Unit
cd
nm
nm
nm
Test
Condition
I
P
=80mA
1/16 Duty
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=80mA
V
R
=10V
I
F
=10mA
4.8
5.4
100
2:1
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.
9-76
Typical Electrical/Optical Characteristic Curves
(25 Ambient Temperatrue Unless Otherwise Noted)
9-77
DISPLAYS
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