LightKey
Datasheet of 4.00 inch 4x4 Dot Matrix LED Display
LM40044A/B Series – 4.00 inch 4x4 Dot Matrix LED Display
ATTENTION
OBSERVE PRECAUTIONS
FOR HANDLING
ELECTROSTATIC
DISCHARGE
SENSITIVE
DEVICES
Features
108.80 mm (4.00 inch) digit high
Dot size: Diameter 20.00 mm
Pitch: 27.20 mm
Wide viewing angle
Range of emitted colors
I.C. compatible
Low power consumption
White dot, grey or black face
RoHS compliant
Available options
Alternative emitting luminosity:
Standard or high brightness version
Alternative emitted color
Alternative dot color
Alternative face
Both CC and CA versions are available
Cropped terminal pins
Package Dimensions
Ø20.0(0.80 )
2 7 . 2 × 3 = 8 1. 6
1 0 8 . 8( 4 . 3 5 )
PIN 1
27.2×3=81.6
108.8(4.35 )
17.0
COL .
1
ROW 1
2
3
2
3
4
Ø0.80
5.08×3=15.24
Notes:
4
1. All dimensions are in millimeters (inches), Tolerance is + 0.25mm (0.01inch) unless other wise noted.
2. Specifications are subject to change without notice.
3. The gap between the reflector and PCB shall not exceed 0.25mm.
SPEC NO: DS10121844
REV: A.4
CHECKED: Emily Zhou
TEL: 0086-574-86322282
94 . 6
APPROVED: M.H. Lin
PAGE: 1/3
HTTP://WWW.LTKEY.COM
DATE: Jul/20/2011
LightKey
Internal Circuit Diagram
LM40044A (Common Cathode Row)
Datasheet of 4.00 inch 4x4 Dot Matrix LED Display
LM40044B (Common Anode Row)
C OL . 1
PI N
8
NO.
PI N
NO.
1
5
2
7
3
3
4
4
CO L . 1
PI N
8
NO.
PI N
NO.
1
5
2
7
3
3
4
4
2
6
2
6
3
2
3
2
4
1
4
1
Selection Guide
Part No.
Common
Cathode Row
LD40044AR
LD40044AD
LD40044AO
LD40044AY
LD40044AG
LD40044AUR
LD40044AUO
LD40044AUA
LD40044AUY
LD40044AUG
LD40044APG
LD40044AUB
LD40044AUW
Unit:
Common
Anode Row
LD40044BR
LD40044BD
LD40044BO
LD40044BY
LD40044BG
LD40044BUR
LD40044BUO
LD40044BUA
LD40044BUY
LD40044BUG
LD40044BPG
LD40044BUB
LD40044BUW
\
Material
GaAlAs
GaAlAs
GaAsP
GaAsP
GaP
AlGaInP
AlGaInP
AlGaInP
AlGaInP
AlGaInP
InGaN
InGaN
SMD
\
Chip
Color
Super Red
Hi-Red
Orange
Yellow
Green
Ultra Red
Ultra Orange
Ultra Amber
Ultra Yellow
Ultra Green
Pure Green
Ultra Blue
Ultra White
\
WLD
640
640
625
588
568
640
625
605
595
573
525
470
\
nm
I
V
@I
F
=20mA
One Dot
Min.
24
54
21
24
21
90
135
90
90
90
360
90
300
mcd
Typ.
30
75
27
30
27
135
180
135
135
135
900
135
360
mcd
SPEC NO: DS10121844
HTTP://WWW.LTKEY.COM
REV: A.4
CHECKED: Emily Zhou
TEL: 0086-574-86322282
APPROVED: M.H. Lin
PAGE: 2/3
DATE: Jul/20/2011
LightKey
Parameter
Datasheet of 4.00 inch 4x4 Dot Matrix LED Display
Electrical Characteristics & Absolute Maximum Ratings
Electrical optical
Characteristics
V
F
@
Per Dot
IF=20mA
Typ.
Super Red
Hi-Red
Orange
Yellow
Green
Ultra Red
Ultra Orange
Ultra Amber
Ultra Yellow
Ultra Green
Pure Green
Ultra Blue
Ultra White
Unit:
Notes:
1. At Ta = 25 °C.
2. Forward voltage at forward current = 20mA.
3. Peak forward current at 1/10 Duty Cycle, 0.1ms Pulse.
[2]
[1]
Absolute Maximum Ratings
[1]
DC
Forward
Current
25
25
30
30
30
30
30
30
30
30
30
30
30
mA
Peak
Forward
Current
[3]
100
100
100
100
100
100
100
100
100
100
100
100
100
mA
Emitted
Color
Reverse
Current
VR=5V
50
50
50
50
50
50
50
50
50
50
50
50
50
uA
Power
Dissipation
240
240
320
320
320
240
260
260
260
300
440
480
480
mW
Max.
8.8
8.8
10
10
10
10.4
10.4
10.4
10.4
10.4
16
16
16
V
Per Dot
Per Dot
Per Dot
Per Dot
Per Dot
Per Dot
Per Dot
Per Dot
Per Dot
Per Dot
Per Dot
Per Dot
Per Dot
\
7.2
7.2
8.4
8.4
8.8
7.6
8
8
8
8.4
14
14
14
V
SPEC NO: DS10121844
HTTP://WWW.LTKEY.COM
REV: A.4
CHECKED: Emily Zhou
TEL: 0086-574-86322282
APPROVED: M.H. Lin
PAGE: 3/3
DATE: Jul/20/2011