LT1447M Datasheet, PDF (1/2 Pages) Sharp Electrionic Components – Dot Matrix LED Unit for Outdoor Use (Lamp Type)

Dot Matrix LED Unit for Outdoor Use LT1447M(Lamp Type)
s 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
s Absolute Maximum Ratings
Parameter
Supply voltage for IC
Supply voltage for LED
Input voltage
Turn-on time
Operating temperature
Storage temperature
Power dissipation
Symbol
VCC
VLED
VI
tON
Topr
Tstg
P
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
(Ta=25˚C)
Unit
V
V
V
ms
˚C
˚C
W
s Optical Characteristics
Parameter
Symbol2
Viewing angle
2θ¹/2
Peak emission wavelength
Red
Yellow-green
λp
(VCC=5V,VLED=5V,Ta=25˚C)
TYP
Unit
40
˚
660
nm
565
LT1447M
s Electrical Characteristics
(VCC=5V,VLED=5V,Ta=25˚C)
Parameter
Symbol MIN. TYP. MAX. Unit
Supply voltage for IC
VCC
4.75 5.0 5.25 V
Supply voltage for LED
VLED
4.5 5.0 5.25 V
IC current dissipation
ICC
------ 270 350 mA
LED current dissipation^*1
ILED
------ 5.0 6.0 A
Input voltage
VIH
3.5 ------ ------ V
VIL
------ ------ 1.5 V
Input current
IIH
------ ------ 0.1 µA
IIL
------ ------ 0.12 mA
Clock frequency
fCLK
------ ------ 3.0 MHZ
Frame frequency
fFR
125 200 ------ HZ
*1 Under the condition that dichromatic all dots are lit.
s Timing Chart
s Luminance
Luminance is classified into 2 ranks shown below.
(VCC=5V,VLED=5V,Ta=25˚C)
Radiation color
Rank
Unit
1
2
Red
600
Yellow-green
750
800
1 000
cd/m²
s Terminal Functions
Connector
Power supply
(CN1)
Symbol
VLED
Vcc
GND1
GND2
A0 to A2
RENABLE
Function
Supply voltage for LED(+5V)
Supply voltage for IC(+5V)
Ground for IC
Ground for LED
Address specification signal for column driver
Controls ON/OFF of red LED
(H: LED OFF)
RDATA
Serial data input for red(H=ON, L=OFF)
Shift from up to down in the unit
HD16/HD31/HD0/HD15
Input signal ^GDATA
(CN2)
LATCH
Serial data input for yellow-green(H=ON, L=OFF)
Shift from up to down in the unit
HD16/HD31/HD0/HD15
Latch signal of display data H: Serial data is converted
to parallel data. L: Contents are latched.
GENABLE
Controls ON/OFF of yellow-green LED
(H: LED OFF)
CLOCK
Clock signal for data transmission in the shift-
register.(L/H: serial data is shifted.)
GND1 Ground for signal (Connected to ground for IC)
A0 to A2 Buffered input signal
RENABLE Buffered input signal
RDATA
Output signal
(CN3) GDATA
Input signal generated through 32-bit shift
register
Input signal generated through 32-bit shift register
LATCH Buffered input signal
GENABLE Buffered input signal
CLOCK Buffered input signal
GND1 Ground for signal (Connected to ground for IC)
Each signal is used as input singal for next unit.
* As for the terminal number, refer to the outline dimensions.
tsu th
tWCLK
CLOCK
R&G
DATA
R&G
DATA out
LATCH
Internal
ENABLE
R&G
ENABLE
ADDRESS
(A0 to A2)
VD(n+1) data
tdD td(C-L)
tWL
td(L-C)
VD(n+2) data
1/fOSC
ON
OFF
td(E-L)
VD(n) data ON
td(E-L)
VD(n)
td(L-A)
ON
td(L-E)
OFF
VD(n+1) data ON
td(A-E)
VD(n+1)
ON
tWENA
s Block Diagram
Luminance adjustment circuit
VR1
VR2
OSC
IN
A0
A1
A2
RENABLE
RDATA
GDATA
LATCH
GENABLE
CLOCK
MONO-MULTI
HC123
Input/output circuit
473
331
HC367
OUT
A0
A1
A2
RENABLE
RDATA
GDATA
LATCH
GENABLE
CLOCK
3 TO 8 DECODER
PNP DRIVER
VD0
VD15
HD16
HD0
16!16 DOT
LED
HD31
HD16
HD0
DICHROMATIC
MATRIX
HD31
HD15
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devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
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