Sharp LT1445M, LT1442M Datasheet
Supply voltage for IC
Supply voltage for LED
Input voltage
*1
Operating temperature
Storage temperature
Power dissipation
V
CC
VLED
VI
Topr
Tstg
P
5.5
3.5
5.5
-10 to +75
-20 to +100
35/49
V
V
V
˚C
˚C
W
Parameter Symbol Rating Unit
(Ta=25˚C)
*1 VI<Vcc at Vcc≤5
Each figure in the table is the one of LT1442M/LT1445M in sequence.
LATCH
CLOCK
CLOCK
LATCH
GENABLE
GENABLE
RENABLE
RENABLE
RDATA
GDATA
RDATA
Shift register(red)
Shift register(yellow-green)
LATCH
Constant current driverConstant current driver
16✕16dots
Dot matrix
CN3
Output signal portion
CN2
Input signal portion
LATCH
GDATA
Yellow-green
Red
LED lamp(dichromatic)
VR1
MONO-MULTI
OSC
VR2
(For red)
(
For yellow-green
)
Luminance
adjustment
circuit
B
U
F
F
E
R
B
U
F
F
E
R
Parameter
Red
Yellow-green
Red
Yellow-green
MIN. 800/700
cd/m
2
Symbol TYP
Unit
LV
MIN. 800/700
36/54 ˚
2θ
1
/2
660
nm
λp
565
Luminance
Viewing angle
Peak emission wavelength
(VCC=5V,VLED=3V,Ta=25˚C)
Each figure in the table is the one of LT1442M/LT1445M in sequence.
Dot Matrix LED Unit for Outdoor Use LT1442M/LT1445M(Lamp Type)
Supply voltage for IC
Supply voltage for LED
IC current dissipation
LED current dissipation
*1
Input voltage
VCC
VLED
ICC
ILED
VIH
4.75
2.75
------
------
3.5
5.0
3.0
220/280
9.3/11.5
------
Clock frequency
f
CLK
------ ------
V
IL
------ ------
Input current
I
IH
------ ------
I
IL
------ ------
Parameter Symbol
MIN. TYP.
5.25
3.25
------
------
------
3.0
1.5
0.1
0.12
MAX.
V
V
mA
A
V
MHz
V
µ
A
mA
Unit
(VCC=5V,VLED=3V,Ta=25˚C)
*1 Under the condition that dichromatic all dots are lit.
Each figure in the table is the one of LT1442M/LT1445M in sequence.
td(C-L)
tholdtsetup
CLOCK
GDATA
RDATA
LATCH
tWCLK
tWL
Internal ENABLE
GENABLE
tWENA
1/fOSC
OFF
ON
Display pattern
OFF
RENABLE
1/f
ENA
■ 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
■ Optical Characteristics
■ Timing Chart
■ Terminal Functions
Connector
Power supply
(CN1)
Input signal
(CN2)
Output signal
(CN3)
Each signal is used as input signal for next unit.
* As for the terminal number, refer to the outline dimensions.
(Notice) ¡
(Internet) ¡Data for sharp's optoelectronic/power device is provided for internet.(Address http://www.sharp.co.jp/ecg/)
Symbol
VLED
VCC
GND
RDATA
GDATA
LATCH
RENABLE
GENABLE
CLOCK
GND
RDATA
GDATA
LATCH
RENABLE
GENABLE
CLOCK
GND
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.
Supply voltage for LED(+3V)
Supply voltage for IC(+5V)
Ground
Serial data input for red(H=ON, L=OFF)
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)
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
Buffered input signal
Buffered input signal
Buffered input signal
Buffered input signal
Ground for signal
Function
■ Block Diagram
159
P10✕13=130 9.59.5
159
9.5
2.5
9.5P10✕13=130
156
154
60 60
256-ø7.5
1
1
VR1
VR2
CN2
5
7
CN1
15
69.75
51
69.75
7
CN3
1
49
21
Depth7
15.84
70
6-M3
31
7 RDATA
CN2(Input signal)
4 GND
GENABLE
2
5 CLOCK
3 LATCH
1 GDATA
5 CLOCK
6 RENABLE6 RENABLE
3 LATCH
1 GDATA
GENABLE
4 GND
2
7 RDATA
CN3(Output signal)
1 VLED
Pin connection
CN1(Power supply)
4 GND
5 VLED
3 VCC
2 GND
130
157
15
23
52
38
1.6t
LT1442M/LT1445MLT1447M
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