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LT1442

更新时间： 2024-02-23 10:36:33
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Dot Matrix LED Unit for Outdoor Use (Lamp Type)

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LT1442 数据手册

 浏览型号LT1442的Datasheet PDF文件第2页 
Dot Matrix LED Unit for Outdoor Use LT1442M/LT1445M(Lamp Type)  
■ 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  
■ Absolute Maximum Ratings  
■ Electrical Characteristics  
(Ta=25˚C)  
(VCC=5V,VLED=3V,Ta=25˚C)  
Parameter  
Supply voltage for IC  
Supply voltage for LED  
Input voltage*1  
Operating temperature  
Storage temperature  
Power dissipation  
Symbol  
VCC  
VLED  
VI  
Topr  
Tstg  
Rating  
5.5  
3.5  
Unit  
V
V
MIN. TYP. MAX.  
Parameter  
Symbol  
Unit  
V
V
mA  
A
V
VCC  
VLED  
ICC  
ILED  
VIH  
VIL  
IIH  
4.75  
2.75  
------  
------  
3.5  
------  
------  
------  
------  
5.0  
3.0  
220/280  
9.3/11.5  
------  
5.25  
3.25  
------  
------  
------  
1.5  
Supply voltage for IC  
Supply voltage for LED  
IC current dissipation  
LED current dissipation*1  
5.5  
V
-10 to +75  
-20 to +100  
35/49  
˚C  
˚C  
W
Input voltage  
Input current  
P
------  
V
*1 VI<Vcc at Vcc≤5  
Each figure in the table is the one of LT1442M/LT1445M in sequence.  
------  
0.1  
µA  
mA  
MHz  
------  
------  
IIL  
fCLK  
0.12  
3.0  
Clock frequency  
*1 Under the condition that dichromatic all dots are lit.  
Each figure in the table is the one of LT1442M/LT1445M in sequence.  
■ Optical Characteristics  
(VCC=5V,VLED=3V,Ta=25˚C)  
Parameter  
Symbol  
TYP  
Unit  
■ Timing Chart  
Red  
MIN. 800/700  
MIN. 800/700  
36/54  
2
Luminance  
LV  
cd/m  
Yellow-green  
Viewing angle  
2θ1/2  
λp  
˚
tsetup  
thold  
td(C-L)  
t
WCLK  
660  
565  
Red  
CLOCK  
nm  
Peak emission wavelength  
Yellow-green  
RDATA  
GDATA  
Each figure in the table is the one of LT1442M/LT1445M in sequence.  
LATCH  
tWL  
1/fENA  
RENABLE  
GENABLE  
■ Terminal Functions  
t
WENA  
Symbol  
Connector  
Function  
Supply voltage for LED(+3V)  
Supply voltage for IC(+5V)  
Ground  
1/fOSC  
VLED  
VCC  
GND  
Power supply  
(CN1)  
Internal ENABLE  
Display pattern  
OFF  
ON  
OFF  
RDATA  
Serial data input for red(H=ON, L=OFF)  
■ Block Diagram  
GDATA  
Serial data input for yellow-green(H=ON, L=OFF)  
L: Contents of shift register is transmitted to latch  
register. H: Contents are latched.  
Controls ON/OFF of red LED  
(L: LED ON)  
Luminance  
adjustment  
circuit  
LATCH  
VR1  
VR2  
For yellow-green  
(For red)  
(
)
Input signal  
(CN2) RENABLE  
OSC  
MONO-MULTI  
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.)  
Ground for signal  
Input signal generated through 256-bit shift register or buffer  
Input signal generated through 256-bit shift  
register or buffer  
GENABLE  
CN3 Output signal portion  
CN2 Input signal portion  
B
U
F
F
E
R
B
U
F
F
E
R
GENABLE  
RENABLE  
CLOCK  
GENABLE  
RENABLE  
CLOCK  
CLOCK  
LATCH  
GND  
RDATA  
LATCH  
RDATA  
GDATA  
RDATA  
GDATA  
GDATA  
Output signal  
(CN3)  
LATCH  
Buffered input signal  
Shift register(yellow-green)  
Shift register(red)  
LATCH  
RENABLE Buffered input signal  
GENABLE Buffered input signal  
LATCH  
CLOCK  
GND  
Buffered input signal  
Ground for signal  
Constant current driver  
Constant current driver  
Each signal is used as input signal for next unit.  
* As for the terminal number, refer to the outline dimensions.  
LED lamp(dichromatic)  
16✕16dots  
Dot matrix  
Yellow-green Red  
¡
In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP  
68 (Notice)  
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/)  
12

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