9-215
DISPLAYS
0.6" Four Digit Clock LED Displays
L TC-637 Series
Notes:All dimensions are in millimeters (inches).Tolerance:
0.25mm (0.010") unless otherwise noted.
Features
0.6 inch (15.0mm) height character red or green color.
Flexible to select both 12/24 hours and full feature.
Continuous uniform segments.
Wide angle, long distance viewing.
Color filter provides high contrast.
Low power requirements, high reliability and long life.
Description
The LTC-6000 series devices are designed for viewing distance of up to
two meters and for using in instrument, test equipment, communication equipment,
business machines, computers, micro processor...ect.
Package Dimensions
A. LTC-637C1X Series
B.LTC-637D1 Series
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Pin Connection
LTL-637C1P-12/LTC-637D1P-12
LTC-637C1G-12/LTC-637D1G-12
Common Cathode 1
Common Cathode 2
Cathode AM
Anode AM
Anode PM
Digit 1 Anode B
No Use
No Use
Digit 2 Anode E, Digit 1 Anode C
Digit 2 Anode B, Digit 2 Anode G
No Use
Digit 3 Anode A, Digit 2 Anode D
Digit 2 Anode A, Digit 2 Anode F
No Use
Digit 3 Anode A, Digit 3 Anode F
Digit 3 Anode B, Digit 3 Anode G
Digit 3 Anode C, Digit 3 Anode D
Digit 3 Anode E, Digit 4 Anode E
Digit 4 Anode B, Digit 4 Anode G
Digit 4 anode C, Digit 4 Anode D
Digit 4 Anode A, Digit 4 Anode F
No Connection
No Connection
No Connection
No Connection
Common Cathode 2
Anode AL
Cathode AL
Common Cathode 1
Anode UC, Anode LC
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
29
30
Common Cathode 1
Common Cathode 2
Cathode AM
Anode AM
Anode PM
Digit 1 Anode B
Digit 1 Anode A, Digit 1 Anode G
Digit 1 Anode D, Digit 1 Anode E
Digit 2 Anode E, Digit 1 Anode C
Digit 2 Anode B, Digit 2 Anode G
No Use
Digit 2 Anode C, Digit 2 Anode D
Digit 2 Anode A, Digit 2 Anode F
No Use
Digit 3 Anode A, Digit 3 Anode F
Digit 3 Anode B, Digit 3 Anode G
Digit 3 Anode C, Digit 3 Anode D
Digit 3 Anode E, Digit 4 Anode E
Digit 4 Anode B, Digit 4 Anode G
Digit 4 Anode C, Digit 4 Anode D
Digit 4 Anode A, Digit 4 Anode F
No Connection
No Connection
No Connection
No Connection
Common Cathode 2
Anode AL
Cathode AL
Common Cathode 1
Anode UC, Anode LC
LTL-637C1P/LTC-637D1P
LTC-637C1G/LTC-637D1G
Part No. LTC-
Green
Common Cathode
Common Cathode
Common Cathode
Common Cathode
Bright Red
637C1P-12
637C1P
637D1P-12
637D1P
Internal
Circuit
Diagram
Description
A
B
A
B
Package
Dimension
A
A
B
B
Devices
637C1G-12
637C1G
637D1G-12
637D1G
Drive Mode Clock AM/PM Alarm
LOW
LOW
LOW
LOW
AM/PM
AM/PM
AM/PM
AM/PM
12Hr
24Hr
12Hr
24Hr
9-217
DISPLAYS
Parameter
Power Dissipation Per Segment
Peak forward Current Per Segment
(1/10 Duty Cycle, 0.1ms Pulse Width)
Continuous forward Current Per Segment
Derating Linar From 25 Per segment
Reverse Voltage Per Segment
Operating Temperature Range
Storage Temperature Range
Ma x. solder Temperature 260 from 3 Seconds at 2 mm from The Case or Reflector Edge
Bright
Red Green
40
60
15
0.2
5
75
100
25
0.33
5
Unit
mW
mA
mA
mA/
V
125
-25 to +65
-25 to +65
Absolute Maximum Ratings at Ta=25
Electrical/Optical Characteristics at Ta=25
Bright Red
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, any Segment or D.P.
Reverse Current, any Segment or D.P.
Luminous Intensity Matching Ratio
Symbol
IV
P
d
VF
IR
IV-m
Min. Typ.
350
697
90
638
2.1
Max.
2.6
100
2:1
Unit
IF=10mA
IF=20mA
IF=20mA
IF=20mA
IF=20mA
VR=5V
IF=10mA
cd
nm
nm
nm
V
A
Test
Condition
Internal Circuit Diagrams
A. LTC-637C1P-12/637D1P-12/637C1G-12/637D1G-12
B. LTC-637C1P/637D1P/637C1G/637D1G
9-218
Typical Electrical/Optical Characteristic Curves
(25 Ambient Temperature Unless Otherwise Noted)
200
Parameter
Average Luminous Intensity
Peak Emission Wavelength
Spectral Line Half-Width
Dominant Wavelength
Forward Voltage, any Segment or D.P.
Reverse Current, any Segment or D.P.
Luminous Intensity Matching Ratio
Symbol
IV
P
d
VF
IR
IV-m
Min. Typ.
600
565
30
569
2.1
Max.
2.6
100
2:1
Unit
IF=10mA
IF=20mA
IF=20mA
IF=20mA
IF=20mA
VR=5V
IF=10mA
cd
nm
nm
nm
VA
Test
Condition
Green
Note:Luminous intensity is measured with a light sensor and filter combination that approximates the CIE
(Commision Internationale De L’Eclairage) eye-response curve.
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