LT1474M Datasheet, PDF (1/2 Pages) Sharp Electrionic Components – Dot Matrix LED Unit for Outdoor Use (Lamp Type,Water-proof Type)

Dot Matrix LED Unit for Outdoor Use LT1474M(Lamp Type,Water-proof Type)
s Features
¡No. of dots : 16!16dots
¡Outline dimensions : 320!320mm
¡Dot size : 18!18mm(Using oval lamp)
¡Dot pitch : 20.0mm
¡Radiation color : Yellow-green+Red(High-luminosity)dichromatic type
¡Driving method : 1/16 duty dynamic drive
LT1474M
s Absolute Maximum Ratings
Parameter
Supply voltage for IC
Supply voltage for LED
Input voltage^*1
Turn-on time
Operating temperature
Storage temperature
Power dissipation
*1 VI<Vcc at Vcc≤5
Symbol
VCC
VLED
V1
tON
Topr
Tstg
P
Rating
-0.3 to +6.0
-0.3 to +9.5
-0.3 to VCC+0.3
1
-20 to +75
-25 to +100
176
(Ta=25˚C)
Unit
V
V
V
ms
˚C
˚C
W
s Optical Characteristics
Parameter
Symbol
Luminance
Red
Yellow-green
Lv
Viewing angle[Horizontal(Red/Yellow-green)] 2θ1/2
Peak emission wavelength
Red
Yellow-green
λp
(VCC=5V,VLED=9V,Ta=25˚C)
TYP.
Unit
1 900
1 500
cd/m²
60/70
˚
660
nm
565
s Electrical Characteristics
(VCC=5V,VLED=9V,Ta=25˚C)
Parameter
Symbol MIN. TYP. MAX. Unit
Supply voltage for IC
LCC
4.75 5.0 5.25 V
Supply voltage for LED
VLED 8.75 9.0 9.25 V
IC current dissipation^*1
ICC
------ 500 750 mA
LED current dissipation^*1
ILED
------ 12 18 A
Input voltage
VIH
3.5 ------ ------ V
VIL
------ ------ 1.5 V
Input current
IIH
------ ------ 0.1 µA
IIL
------ ------ 0.12 mA
Clock frequency
fCLK
------ ------ 10 MHZ
*1 Under the condition that dichromatic all dots are lit.
s Timing Chart
tsu th
CLOCK
RDATA
GDATA
RDATA out
GDATA out
LATCH
VD(n+1) data
tdD
td(C-L)
td(L-C)
t WL
t WCLK
VD(n+2) data
s Terminal Functions
Connector Symbol
Function
Power
supply
(CN1)
VLED
VCC
GND1
GND2
Supply voltage for LED(+9V)
Supply voltage for IC(+5V)
Ground for IC
Ground for LED
A0 to A3 Address specification signal for row driver
RDATA
Serial data input for red
(H=ON, L=OFF)
Input
GDATA
Serial data input for yellow-green
(H=ON, L=OFF)
signal LATCH Latch signal of display data
(CN2) _RENABLE Controls ON/OFF of LED
GENABLE (H: LED OFF)
Clock signal for data transmission in the shift-
CLOCK register.(L/H: serial data is shifted.)
GND1 Ground for signal
A0 to A3 Buffered input signal
RDATA
Input signal generated through 16-bit shift
register or buffer
Output
signal
(CN3)
Input signal generated through 16-bit shift
GDATA _{register or buffer}
LATCH Buffered input signal
RENABLE
GENABLE
Buffered input signal
CLOCK Buffered input signal
GND1 Ground for signal(Connected to ground for IC)
Each signal is used as input signal for next unit.
* As for the terminal number, refer to the outline dimensions.
RENABLE
GENABLE
ADDRESS
(A0 to A3)
VD(n) data ON
td(E-A)
VD(n)
s Block Diagram
OUT
A0
A1
A2
A3
RDATA
GDATA
LATCH
GENABLE
CLOCK
GND1
RENABLE
NC
VD(n+1) data ON
td(A-E)
td(A-L)
VD(n+1)
t WENA
GATE
2TO 4DECODER
PNP DRIVER
IN
A0
A1
A2
A3
RDATA
GDATA
LATCH
GENABLE
CLOCK
GND1
RENABLE
NC
Luminance adjustment circuit
RADJ
Luminance adjustment circuit
RADJ
8BIT SHIFT-REGISTER
LATCH AND DRIVER
8BIT SHIFT-REGISTER
LATCH AND DRIVER
8BIT SHIFT-REGISTER
LATCH AND DRIVER
8BIT SHIFT-REGISTER
LATCH AND DRIVER
8BIT SHIFT-REGISTER
LATCH AND DRIVER
8BIT SHIFT-REGISTER
LATCH AND DRIVER
8BIT SHIFT-REGISTER
LATCH AND DRIVER
8BIT SHIFT-REGISTER
LATCH AND DRIVER
16!16 DOT
DICHROMATIC
LEDMATRIX
8BIT SHIFT-REGISTER
LATCH AND DRIVER
!2
8BIT SHIFT-REGISTER
LATCH AND DRIVER
!2
8BIT SHIFT-REGISTER
LATCH AND DRIVER
!2
8BIT SHIFT-REGISTER
LATCH AND DRIVER
!2
8BIT SHIFT-REGISTER
LATCH AND DRIVER
!2
8BIT SHIFT-REGISTER
LATCH AND DRIVER
!2
8BIT SHIFT-REGISTER
LATCH AND DRIVER
!2
GADJ
Luminance adjustment circuit
8BIT SHIFT-REGISTER
LATCH AND DRIVER
!2
GADJ
Luminance adjustment circuit
17 (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.
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