LT1540M Datasheet, PDF (1/2 Pages) Sharp Electrionic Components – Dot Matrix LED Unit for Outdoor Use (Lamp Type)

Dot Matrix LED Unit for Outdoor Use LT1540M(Lamp Type)
s Features
¡No. of dots : 16!16dots
¡Outline dimensions : 240!240mm
¡Dot size : 13.0!13.0mm
¡Dot pitch : 14.9mm
¡Radiation color : Yellow-green+Red(High-luminosity)dichromatic type
¡Driving method : 1/8 duty dynamic drive
LT1540M
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
VCC
VLED
VI
tON
Topr
Tstg
P
Rating
-0.3 to +6.0
-0.3 to +8.5
-0.3 to Vcc+0.3
1
-20 to +45
-25 to +100
58
(Ta=25˚C)
Unit
V
V
V
ms
˚C
˚C
W
s Optical Characteristics
Parameter
Symbol
Viewing angle
2θ¹/2
Peak
emission
wavelength
Red
Yellow-green
λp
(Vcc=5V,VLED=8V,Ta=25˚C)
TYP.
Unit
50
˚
660
565
nm
s Luminance
Luminance is classified into 2 ranks shown below.
(Vcc=5V,VLED=8V,Ta=25˚C)
Radiation color
Rank
1
2
Unit
Red
Yellow-green
1 200
750
1 600
1 000
cd/m²
s Terminal Functions
Connector Symbol
Power
supply
(CN1)
VLED
VCC
GND1
GND2
A0 to A2
Function
Supply voltage for LED (+8V)
Supply voltage for IC (+5V)
Ground for IC
Ground for LED
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
HD16¡HD31¡HD0¡HD15
Input
signal
(CN2)
LATCH
Latch signal of display data.H: Serial data is
converted to parallel data. L: Contents are latched.
LATCH signal is set up after switching address(A0 to A2)
RENABLE Controls ON/OFF of each color of LED.
GENABLE (H: LED OFF)
Output
signal
(CN3)
CLOCK
Clock signal for data transmission in the shift-register.
(L¡H: serial data is shifted.)
GND1 Ground for signal. (Connected to ground for IC)
A0 to A3 Buffered input signal
RDATA Input signal generated through 32-bit shift
GDATA register
LATCH 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=8V,Ta=25˚C)
Parameter
Symbol MIN. TYP.
Supply voltage for IC
VCC
4.75 5.0
Supply voltage for LED
VLED
7.5 8.0
IC current dissipation
ICC
------ 200
LED current dissipation^*1 ILED
------ _5.5
Input voltage
VIH
3.5 ------
VIL
------ ------
Input current
IIH
------ ------
IIL
------ ------
Clock frequency
fCLK
------ ------
Frame frequency
fFR
250 400
*1 Under the condition that dichromatic all dots are lit.
MAX.
5.25
8.25
500
7.0
------
1.5
0.1
0.12
10.0
3 000
Unit
V
V
mA
A
V
V
µA
mA
MHz
Hz
s Timing Chart
tSU
th
tWCLK
CLOCK
RDATA
GDATA
RDATA out
GDATA out
VD(n+1) data
tdD
LATCH
Internal
ENABLE
t=1/fosc
ON ON
ON
td(C-L)
td(L-C)
tWL
ON
OFF ON
VD(n+2) data
ON
ON
OFF
RENABLE
GENABLE
ADDRESS
(A0 to A2)
VD(n) data ON
td(E-A)
VD(n)
s Block Diagram
VD(n+1) data ON
td(A-E)
td(A-L)
VD(n+1)
tWKNA
Input/output circuit
473
331
HC367
A0
A1
A2
RENABLE
RDATA
GDATA
LATCH
GENABLE
CLOCK
GND1
OUT
Luminance adjustment circuit
GADJ RADJ
OSC MONO-MULTI
3 to 8 DECODER
GATE
IN
A0
A1
A2
RENABLE
RDATA
GDATA
LATCH
GENABLE
CLOCK
GND1
HD16
PNPDRIVER
HD16
16!16 Dot
HD31
HD0
HD31
HD0
matrix LED
HD15
HD15
SELECTOR
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