LT1448MA 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 LT1448MA(Lamp Type,Water-proof Type)
s Features
¡No. of dots : 16!16dots
¡Outline dimensions : 160!160mm
¡Dot size : ø7.5mm(Using oval lamp)
¡Dot pitch : 9.9mm
¡Radiation color : Yellow-green+Red(High-luminosity)dichromatic type
¡Driving method : 1/4 duty dynamic drive
LT1448MA
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
VDD
VLED
VI
tON
Topr
Tstg
P
Rating
-0.3 to +5.5
-0.3 to +5.0
-0.3 to Vcc+0.3
1
-10 to +45
-20 to +100
38
(Ta=25˚C)
Unit
V
V
V
ms
˚C
˚C
W
s Optical Characteristics
Parameter
Viewing angle(Horizontal)
Peak emission wavelength
Red
Yellow-green
Symbol
2θ¹/2
λp
(VCC=5V,VLED=4.5V,Ta=25˚C)
TYP
Unit
70
˚
660
nm
565
s Luminance
Luminance is classified into 2 ranks shown below.
(VCC=5V,VLED=4.5V,Ta=25˚C)
Rank
Radiation color
1
2
Unit
Red
Yellow-green
1 100
700
1 300
800
cd/m²
s Terminal Functions
Connector Symbol
Function
VLED
Supply voltage for LED(+4.5V)
Power supply VCC
Supply voltage for IC(+5V)
(CN1) GND1 Ground for IC
GND2 Ground for LED
A0,A1 Address specification signal for column driver
RDATA
GDATA
Serial data input for each color(H:ON, L:OFF)
Shift from up to down in the unit
(HD48/HD63/HD32/HD47/HD16/HD31/HD0/HD15)
Input signal
Latch signal of display data
(CN2) ^LATCH L/H: Contents of shift register are latched.
RENABLE Controls ON/OFF of each color 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 (Connected to ground for IC)
A0,A1 Buffered input signal
Output signal ^RDATA
(CN3) ^GDATA
LATCH
Input signal generated through 64-bit shift register or
buffer
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.
s Electrical Characteristics
(VCC=5V,VLED=4.5V,Ta=25˚C)
Parameter
Symbol MIN. TYP. MAX. Unit
Supply voltage for IC
VDD 4.75 5.0 5.25 V
Supply voltage for LED
VLED 4.25 4.5 4.75 V
IC current dissipation^*1
IDD
------ 400 800 mA
LED current dissipation^*1
ILED ------ 6.0 7.0 A
Input voltage
VIH
3.5 ------ ------ V
VIL
------ ------ 1.5 V
Input current
IIH
------ ------ 0.1 µA
IIL
------ ------ 0.12 mA
Clock frequency
fCLK ------ ------ 10 MHZ
Frame frequency
fFR
250 400 3 000 HZ
*1 Under the condition that dichromatic all dots are lit.
s Timing Chart
tSU
CLOCK
RDATA
GDATA
RDATA out
GDATA out
LATCH
Internal
ENABLE
RENABLE
GENABLE
ADDRESS
(A0, A1)
th
t WCLK
VD (N+1)
t dD
t d (C-L)
t d(L-C)
t WL
VD (n+2) data
1/fosc
ON
OFF
t d(K-L)
VD (n) data ON
t d (K-A)
VD (n)
ON
OFF
t d (L-K)
VD (n+1) data ON
t d (A-K)
t d(L-A)
VD (n+1)
ON
t WKNA
s Block Diagram
IN
A0
A1
RENABLE
RDATA
GDATA
LATCH
GENABLE
CLOCK
GND1
Luminance adjustment circuit
VR2 VR1
MONO-MULTI OSC
HC123
3 to 8 DECODER
Input/output circuit
473
331 HC541
OUT
A0
A1
RENABLE
RDATA
GDATA
LATCH
GENABLE
CLOCK
GND1
PNP DRIVER
V D0
H D0
V D15
H D0
HD15
HD16
HD15
HD16
16!16
HD31
HD32
Dot matrix LED
HD31
HD32
HD47
HD48
HD47
HD48
HD63
HD63
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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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