0.3" Dual Digit
Numeric LED Displays
LTD-322
LTD-323
Features
0.3 inch (7.62mm) digit height
Continuous uniform segments.
Choices of five bright colors-AlGaAs red/bright red/
green/yellow/red orange.
Low power requirement.
Excellent characters appearance.
High contrast.
High brightness.
Wide viewing angle.
Solid state reliability.
Common anode or Common cathode modles.
Two digit package simplifies alignments & assembly.
Leads on 0.1" (2.54mm) centers.
Categorized for luminous intensity.
I.C. compatiable.
Easy mounting on P.C. board.
Notes:All dimensions are in millimeters (inches).
Tolerance: 0.25mm (0.01") unless otherwise noted.
Series
Package Dimensions
Description
The LTD-322/323 series are 0.3 inch (7.62mm) height dual digit displays. All device displays have black face and white
segments.
The AlGaAs red seven segment displays are designed for appleications requiring low power consumption. They are
tested and selected for the excellent low current characteristics to ensure that the segments are matched at low
current. Drive current as low as 1 mA per segment is available.
The AlGaAs red series device utilize LED chips which are made from AlGaAs on a non-transparent GaAs substrate.
The bright red and green series devices utilize LED chips which are made from GaP on a transparent GaP substrate.
The yellow, red orange series devices utilize LED chips which are made from GaAsP on a transparent GaP substrate.
Devices
Part No. LTD-
AlGaAs Red
322WC
323WC
Bright Red
322P
323P
Red
Green Yellow Orange
322G
323G
322Y
323Y
322E
323E
Description
Dualplex Common Cathode,
Rt. Hand Decimal
Dualplex Common Anode,
Rt. Hand Decimal
Internal
Circuit
Diagram
A
B
Pin Connection
Pin No.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Connection
A.LTD-322
Anode G
No Pin
Anode A
Anode F
Common Cathode (Digit 2)
Anode D
Anode E
Anode C
Anode B
Common Cathode (Digit 1)
B.LTD-323
Cathode G
No Pin
Cathode A
Cathode F
Common Anode (Digit 2)
Cathode D
Cathode E
Cathode C
Cathode B
Common Anode (Digit 1)
9-124
Internal Circuit Diagrams
A.LTD-322
B.LTD-323
Absolute Maximum Rating at Ta=25
Parameter
Power Dissipation Per Segment
Peak Forward Current Per Segment
(1/10 Duty Cycle, 0.1ms Pulse Width)
Continuous Forward Current Per Segment
Derating Linear from 25 Per Segment
Reverse Voltage Per Segment
Operating Temperature Range
Stroage Temperature Range
Solder Temperature 1/16 Inch Below Seating Plane for 3 Seconds at 260
AlGaAs Red
75
125
30
0.4
5
Bright Red
40
60
15
0.2
5
-35
-35
Green
75
100
25
0.33
5
to +85
to +85
Red
Yellow Orange
60
80
20
0.27
5
75
100
25
0.33
5
Unit
mW
mA
mA
mA/
V
Electrical/Optical Characteristics at Ta=25
LTD-322WC/323WC
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
d
V
F
I
R
I
V
-m
Symbol
I
V
P
Min.
200
Typ.
600
3100
660
35
638
1.6
1.7
1.8
Max.
Unit
cd
nm
nm
nm
Tset Condition
I
F
=1mA
I
F
=5mA
I
F
=20mA
I
F
=20mA
I
F
=20mA
I
F
=1mA
I
F
=5mA
I
F
=20mA
V
R
=5V
I
F
=10mA
Forward Voltage, Per Segment
Reverse Current, Per Segment
Luminous Intensity Matching Ratio
2.4
100
2:1
V
A
LTD-322P/323P
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, Per Segment
Reverse Current, Per Segment
Luminous Intensity Matching Ratio
d
V
F
I
R
I
V
-m
Symbol
I
V
P
Min.
210
Typ.
650
697
90
657
2.1
Max.
Unit
cd
nm
nm
nm
Tset Condition
I
F
=10mA
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
9-125
DISPLAYS
LTD-322G/323G
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, Per Segment
Reverse Current, Per Segment
Luminous Intensity Matching Ratio
d
V
F
I
R
I
V
-m
Symbol
I
V
P
Min.
540
Typ.
1600
565
30
569
2.1
Max.
Unit
cd
nm
nm
nm
Tset Condition
I
F
=10mA
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
LTD-322Y/323Y
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, Per Segment
Reverse Current, Per Segment
Luminous Intensity Matching Ratio
d
V
F
I
R
I
V
-m
Symbol
I
V
P
Min.
500
Typ.
2000
585
35
588
2.1
Max.
Unit
cd
nm
nm
nm
Tset Condition
I
F
=10mA
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
LTD-322E/323E
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, Per Segment
Reverse Current, Per Segment
Luminous Intensity Matching Ratio
d
V
F
I
R
I
V
-m
Symbol
I
V
P
Min.
500
Typ.
2000
630
40
621
2.0
Max.
Unit
cd
nm
nm
nm
Tset Condition
I
F
=10mA
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
Note: Luminous intensity is measured with a light sensor and filter combiuation that approximates the CIE (Commision
Internationale De L’Eclairage) eye-response curve.
9-126
Typical Electrical/Optical Characteristic Curves
(25 Ambient Temperature Unless Otherwise Noted)
9-127
DISPLAYS
FPGA/CPLD
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