5 5 7 Single Color AlInGaP
Dot Matrix LED Displays
LTP-2057A/2157A
Features
2.0 Inch (50.80mm) matrix height.
Low power requirement.
Single plane, wide viewing angle.
Solid state reliability.
5 7 array with X-Y select.
Compatible with usascll and ebcdic codes.
Stackable horizontally.
Chocies 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 three color-
AlInGaP Super Red/AlInGaP red orange/AlInGaP amber
yellow.
Series
Package Dimensions
LTP-2057A/2157A
Description
The LTP-2057/2157A series are 2.0 inch (50.8mm) matrix
height 5 7 dot matrix displays. All device have gray
face and white segment.
The AlInGaP super red, AlInGaP red orange and AlInGaP
amber yellow series device utilize LED chips which are
made from AlInGaP on a non-transparent GaAs substrate.
Devices
AlInGaP Super Red AlInGaP Red Orange
LTP-2057AKR
LTP-2157AKR
LTP-2057AKA
LTP-2157AKA
Pin Connection
Pin No.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Y
R
A
IN
IM
L
E
R
P
Part No.
AlInGaP Amber
Yellow
LTP-2057AKY
LTP-2157AKY
Notes:All dimensions are in millimeters (inches).
Tolerance: 0.25mm (0.01") unless otherwise
noted.
Description
Internal
Circuit
Diagram
A
B
Anode Column, Cathode Row
Cathode Column, Anode Row
Connection
A.LTP-2057A
B.LTP-2157A
Cathode Row 5
Cathode Row 7
Anode Column 2
Anode Column 3*1
Cathode Row 4*2
Anode Column 5
Cathode Row 6
Cathode Row 3
Cathode Row 1
Anode Column 4
Anode Column 3*1
Cathode Row 4*2
Anode Column 1
Cathode Row 2
Anode Row 5
Anode Row 7
Cathode Column 2
Cathode Column 3*1
Anode Row 4*2
Cathode Column 5
Anode Row 6
Anode Row 3
Anode Row 1
Cathode Column 4
Cathode Column 3*1
Anode Row 4*2
Cathode Column 1
Anode Row 2
Notes: 1.Pin 4 & 11 are internally connected.
2.Pin 5 & 12 are internally connected.
9-45
DISPLAYS
Internal Circuit Diagrams
A.LTP-2057A
B.LTP-2157A
Absolute Maximum Ratings at Ta=25
Parameter
Average Power Dissipation Per Dot
Peak Forward Current Per Dot
Derating Linear from 25
Average Forward Current 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
LTP-2057AKR/2157AKR
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, any Dot
Reverse Current, any Dot
Y
R
A
IN
IM
L
E
R
P
AlInGaP
Super Red
36
13
5
100
AlInGaP
Red Orange
36
13
5
100
AlInGaP
Amber Yellow
36
13
5
100
Unit
mW
mA
Per Dot
0.17
0.17
0.17
mA
mA/
V
-35
to +85
to +85
-35
Parameter
Symbol
I
V
Min.
2100
Typ.
4600
639
20
631
2.0
Max.
Unit
Test Condition
I
P
=32mA
1/16 Duty
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=20mA
V
R
=5V
I
F
=10mA
cd
P
d
nm
nm
nm
V
V
F
I
R
2.6
2:1
100
A
Luminous Intensity Matching Ratio
I
V
-m
LTP-2057AKA/2157AKA
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.
2100
Typ.
4600
621
18
615
2.05
Max.
Unit
cd
nm
nm
nm
Test Condition
I
P
=32mA
1/16 Duty
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=20mA
V
R
=5V
I
F
=10mA
2.6
100
2:1
V
A
9-46
LTP-2057AKY/2157AKY
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.
2100
Typ.
4600
595
15
592
2.05
Max.
Unit
cd
nm
nm
nm
Test Condition
I
P
=32mA
1/16 Duty
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=20mA
V
R
=5V
I
F
=10mA
2.6
100
2:1
V
A
Typical Electrical/Optical Characteristic Curves
(25 Ambient Temperature Unless Otherwise Noted)
Y
R
A
IN
IM
L
E
R
P
9-47
DISPLAYS
Note: Luminous intensity is measured with a light sensor and filter combiuation that approximates the CIE (Commision
Internationale De L’Eclairage) eye-response curve.
详细参数
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