Dot Matrix LED Unit for Outdoor Use LT1447M(Lamp Type)
■ Features
¡No. of dots : 16✕16dots
¡Outline dimensions : 144✕144mm
¡Dot size : ø7.5mm
¡Dot pitch : 9.0mm
¡Radiation color : Yellow-green+Red(High-luminosity)dichromatic type
¡Driving method : 1/8 duty dynamic drive
LT1447M
■ Absolute Maximum Ratings
(Ta=25˚C)
■ Electrical Characteristics
(VCC=5V,VLED=5V,Ta=25˚C)
Parameter
Symbol
VCC
VLED
VI
Rating
-0.3 to +6.0
-0.3 to +5.5
-0.3 to VCC+0.3
1
-10 to +45
-25 to +85
35
Unit
V
V
Parameter
Symbol
VCC
VLED
ICC
ILED
VIH
VIL
IIH
IIL
MIN. TYP. MAX. Unit
Supply voltage for IC
Supply voltage for LED
Input voltage
Supply voltage for IC
Supply voltage for LED
IC current dissipation
LED current dissipation*1
4.75
4.5
------
------
3.5
------
------
------
------
125
5.0
5.0
270
5.0
------
------
------
------
------
200
5.25
5.25
350
6.0
------
1.5
0.1
0.12
3.0
V
V
mA
A
V
V
µA
mA
MHZ
HZ
V
Turn-on time
t
ON
ms
˚C
˚C
W
Operating temperature
Storage temperature
Power dissipation
Topr
Tstg
P
Input voltage
Input current
fCLK
fFR
Clock frequency
Frame frequency
■ Optical Characteristics
(VCC=5V,VLED=5V,Ta=25˚C)
------
Parameter
Viewing angle
Symbol2
TYP
40
Unit
˚
*1 Under the condition that dichromatic all dots are lit.
1
2θ /2
660
565
Red
Yellow-green
nm
Peak emission wavelength
λp
■ Timing Chart
tsu
th
tWCLK
■ Luminance
Luminance is classified into 2 ranks shown below.
CLOCK
R&G
DATA
(VCC=5V,VLED=5V,Ta=25˚C)
V
D
(n+1) data
VD(n+2) data
Rank
Radiation color
Unit
R&G
DATA out
tWL
1
2
tdD
td(C-L)
td(L-C)
600
750
800
1 000
Red
Yellow-green
LATCH
2
m
cd/
1/fOSC
ON
Internal
ENABLE
OFF
td(E-L)
OFF
ON
td(L-E)
ON
■ Terminal Functions
VD(n+1) data ON
td(A-E)
R&G
ENABLE
VD(n) data ON
td(E-L)
tWENA
Symbol
VLED
Vcc
Connector
Function
ADDRESS
(A0 to A2)
Supply voltage for LED(+5V)
Supply voltage for IC(+5V)
Ground for IC
V
D(n)
VD(n+1)
Power supply
(CN1)
td(L-A)
GND1
GND2
A0 to A2 Address specification signal for column driver
Ground for LED
■ Block Diagram
Controls ON/OFF of red LED
(H: LED OFF)
RENABLE
Luminance adjustment circuit
VR1
VR2
Serial data input for red(H=ON, L=OFF)
Shift from up to down in the unit
Input/output circuit
RDATA
GDATA
473
HD16/HD31/HD0/HD15
331
HC367
MONO-MULTI
OSC
Serial data input for yellow-green(H=ON, L=OFF)
Shift from up to down in the unit
HC123
Input signal
(CN2)
H
D16/HD31/HD0/HD15
IN
OUT
A0
A1
A0
A1
A2
Latch signal of display data H: Serial data is converted
to parallel data. L: Contents are latched.
Controls ON/OFF of yellow-green LED
(H: LED OFF)
A2
LATCH
RENABLE
RDATA
GDATA
LATCH
GENABLE
CLOCK
RENABLE
RDATA
GDATA
LATCH
GENABLE
CLOCK
GENABLE
3 TO 8 DECODER
PNP DRIVER
Clock signal for data transmission in the shift-
register.(L/H: serial data is shifted.)
CLOCK
GND1
Ground for signal (Connected to ground for IC)
V
D15
V
D0
HD16
HD0
A0 to A2 Buffered input signal
RENABLE Buffered input signal
16✕16 DOT
Input signal generated through 32-bit shift
register
Input signal generated through 32-bit shift register
Buffered input signal
RDATA
LED
Output signal
(CN3)
H
HDD1361
GDATA
LATCH
HD0
DICHROMATIC
MATRIX
GENABLE Buffered input signal
CLOCK
GND1
Each signal is used as input singal for next unit.
Buffered input signal
Ground for signal (Connected to ground for IC)
HD31
HD15
*
As for the terminal number, refer to the outline dimensions.
(Notice)
¡
In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP
devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
(Internet) ¡Data for sharp's optoelectronic/power device is provided for internet.(Address http://www.sharp.co.jp/ecg/)
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