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)
s
Electrical Characteristics
Parameter
Supply voltage for IC
Supply voltage for LED
IC current dissipation
LED current dissipation
*1
(V
CC
=5V,V
LED
=3V,Ta=25˚C)
Parameter
Symbol
Rating
Unit
Supply voltage for IC
V
V
CC
5.5
Supply voltage for LED
V
V
LED
3.5
*1
Input voltage
V
5.5
V
I
Operating temperature
-10 to +75
T
opr
˚C
Storage temperature
-20 to +100
T
stg
˚C
W
Power dissipation
35/49
P
*1 V
I
<Vcc at Vcc≤5
Each figure in the table is the one of LT1442M/LT1445M in sequence.
s
Optical Characteristics
Parameter
Red
Yellow-green
Viewing angle
Red
Peak emission wavelength
Yellow-green
Luminance
Symbol
L
V
2θ
1
/
2
λp
(V
CC
=5V,V
LED
=3V,Ta=25˚C)
MIN. TYP. MAX. Unit
Symbol
V
5.0
V
CC
4.75
5.25
V
3.0
2.75
3.25
V
LED
------ 220/280 ------
mA
I
CC
------ 9.3/11.5 ------
I
LED
A
------
------
3.5
V
IH
V
Input voltage
------
------
V
IL
V
1.5
------
------
I
IH
0.1
Input current
µA
------
------
I
IL
mA
0.12
Clock frequency
------
------
MHz
3.0
f
CLK
*1 Under the condition that dichromatic all dots are lit.
Each figure in the table is the one of LT1442M/LT1445M in sequence.
TYP
MIN. 800/700
MIN. 800/700
36/54
660
565
Unit
cd/m
˚
nm
2
s
Timing Chart
tsetup
CLOCK
RDATA
GDATA
LATCH
t
WL
1/f
ENA
thold
td(C-L)
t
WCLK
Each figure in the table is the one of LT1442M/LT1445M in sequence.
s
Terminal Functions
Symbol
V
LED
Power supply
V
CC
(CN1)
GND
RDATA
Connector
GDATA
LATCH
Input signal
(CN2) RENABLE
GENABLE
CLOCK
GND
RDATA
GDATA
Function
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
RENABLE
GENABLE
t
WENA
1/f
OSC
Internal ENABLE
Display pattern
OFF
ON
OFF
s
Block Diagram
Luminance
adjustment
circuit
OSC
VR1
(For red)
VR2
(For yellow-green)
MONO-MULTI
CN2 Input signal portion
GENABLE
RENABLE
CLOCK
LATCH
RDATA
GDATA
B
U
F
F
E
R
B
U
F
F
E
R
CN3 Output signal portion
GENABLE
RENABLE
CLOCK
LATCH
RDATA
GDATA
Output signal LATCH
Buffered input signal
(CN3)
RENABLE Buffered input signal
GENABLE Buffered input signal
Buffered input signal
CLOCK
Ground for signal
GND
Each signal is used as input signal for next unit.
* As for the terminal number, refer to the outline dimensions.
Shift register(yellow-green)
Shift register(red)
LATCH
LATCH
Constant current driver
Constant current driver
LED lamp(dichromatic)
16!16dots
Dot matrix
Yellow-green Red
devices
catalogs, data books, etc. Contact SHARP
68
(Internet)
¡Data
forshown inoptoelectronic/power device is provided for in order to obtain the latest device specification sheets before using any SHARP device.
sharp's
internet.(Address http://www.sharp.co.jp/ecg/)
(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
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