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LT1442M Datasheet

Dot Matrix LED Unit for Outdoor Use (Lamp Type)

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Dot Matrix LED Unit for Outdoor Use LT1442M/LT1445M(Lamp Type)
s Features
¡No. of dots : 16!16dots
¡Outline dimensions : 160!160mm
¡Dot size : ø7.5mm
¡Dot pitch : 10mm
¡Radiation color : Yellow-green+Red(High-luminosity)dichromatic type
¡Driving method : Static drive
LT1445M
s Absolute Maximum Ratings
(Ta=25˚C)
Parameter
Symbol
Rating
Unit
Supply voltage for IC
VCC
5.5
V
Supply voltage for LED VLED
3.5
V
Input voltage*1 VI 5.5 V
Operating temperature
Topr
-10 to +75
˚C
Storage temperature Tstg -20 to +100 ˚C
Power dissipation
P
35/49
W
*1 VI<Vcc at Vcc5
Each figure in the table is the one of LT1442M/LT1445M in sequence.
s Optical Characteristics
(VCC=5V,VLED=3V,Ta=25˚C)
Parameter
Luminance
Red
Yellow-green
Viewing angle
Peak emission wavelength Red
Yellow-green
Symbol
LV
2θ1/2
λp
TYP
MIN. 800/700
MIN. 800/700
36/54
660
565
Unit
cd/m2
˚
nm
Each figure in the table is the one of LT1442M/LT1445M in sequence.
s Terminal Functions
Connector Symbol
VLED
Power supply
(CN1)
VCC
GND
RDATA
Function
Supply voltage for LED(+3V)
Supply voltage for IC(+5V)
Ground
Serial data input for red(H=ON, L=OFF)
GDATA Serial data input for yellow-green(H=ON, L=OFF)
LATCH
Input signal
(CN2) RENABLE
L: Contents of shift register is transmitted to latch
register. H: Contents are latched.
Controls ON/OFF of red LED
(L: LED ON)
GENABLE
CLOCK
Controls ON/OFF of yellow-green LED
(L: LED OFF)
Clock signal for data transmission in the shift-
register.(L/H: serial data is shifted.)
GND
RDATA
GDATA
Ground for signal
Input signal generated through 256-bit shift register or buffer
Input signal generated through 256-bit shift
register or buffer
Output signal LATCH Buffered input signal
(CN3)
RENABLE Buffered input signal
GENABLE Buffered input signal
CLOCK Buffered input signal
GND
Ground for signal
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=3V,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 2.75 3.0 3.25 V
IC current dissipation
ICC ------ 220/280 ------ mA
LED current dissipation*1
ILED ------ 9.3/11.5 ------ 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
*1 Under the condition that dichromatic all dots are lit.
Each figure in the table is the one of LT1442M/LT1445M in sequence.
s Timing Chart
tsetup
CLOCK
RDATA
GDATA
LATCH
RENABLE
GENABLE
Internal ENABLE
Display pattern
thold
td(C-L)
tWCLK
tWL
tWENA
1/fENA
1/fOSC
OFF
ON
OFF
s Block Diagram
Luminance VR1
adjustment (For red)
circuit
VR2
(For yellow-green)
OSC
MONO-MULTI
CN2 Input signal portion
GENABLE
RENABLE
CLOCK
LATCH
RDATA
GDATA
B
U
F
F
E
R
CN3 Output signal portion
B GENABLE
U RENABLE
F CLOCK
F LATCH
E RDATA
R GDATA
Shift register(yellow-green)
Shift register(red)
LATCH
LATCH
Constant current driver
Constant current driver
LED lamp(dichromatic)
16!16dots
Dot matrix
Yelow-green Red
68 (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/)


Sharp Electronic Components Datasheet

LT1442M Datasheet

Dot Matrix LED Unit for Outdoor Use (Lamp Type)

No Preview Available !

10
9.5
159
P10!13=130
9.5
52
38
23
15
256-ø7.5
1.6t
156
154
60
60
CN3 CN1
75
11
VR1
VR2
CN2
7
1
21
51
49
6-M3
Depth7
Pin connection
CN1(Power supply)
1 VLED
2 GND
3 VCC
4 GND
5 VLED
CN2(Input signal)
1 GDATA
2 GENABLE
3 LATCH
4 GND
5 CLOCK
6 RENABLE
7 RDATA
CN3(Output signal)
1 GDATA
2 GENABLE
3 LATCH
4 GND
5 CLOCK
6 RENABLE
7 RDATA
LT1442M/LT1445M


Part Number LT1442M
Description Dot Matrix LED Unit for Outdoor Use (Lamp Type)
Maker Sharp Electrionic Components
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LT1442M Datasheet PDF






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