LT1550ED Datasheet, PDF (1/2 Pages) Sharp Electrionic Components – Dot Matrix LED Unit for Indoor Use (Chip Type)

Dot Matrix LED Unit for Indoor Use LT1550ED(Chip Type)
s Features
¡No. of dots : 16!32dots
¡Outline dimensions : 64.0!128.0mm
¡Dot size : 3.0!3.0mm
¡Dot pitch : 4.0mm
¡Radiation color : Yellow-green+Red(dichromatic type)
¡Driving method : 1/16 duty dynamic drive
s Absolute Maximum Ratings
Parameter
Supply voltage for IC
Supply voltage for LED
Input voltage
Turn-on time
Operating temperature
Storage temperature
Power dissipation
*1 25% or less of lighting
Symbol
VCC
VLED
V1
tON
Topr
Tstg
P
Rating
-0.3 to +5.5
-0.3 to +4.5
-0.3 to Vcc+0.3
1
-10 to +60^*1
-20 to +70
20
(Ta=25˚C)
Unit
V
V
V
ms
˚C
˚C
W
s Optical Characteristics
Parameter
Symbol
Luminance
Red
Yellow-green
Lv
Viewing angle
2θ^1/2
Peak emission wavelength
Red
Yellow-green
λp
(VCC=5V,VLED=4V,Ta=25˚C)
TYP.
Unit
120
cd/m²
180
120
˚
635
nm
565
s Terminal Functions
Connector
Power
supply
(CN1)
Symbol
VLED
VCC
GND
A0 to A3
Function
Supply voltage for LED (+4V)
Supply voltage for IC (+5V)
Ground
Address specification signal for row driver
RDATA Serial data input for red (H=ON, L=OFF)
Input
signal
(CN2)
GDATA Serial data input for yellow-green (H=ON, L=OFF)
Latch signal of display data. H: Serial data is
LATCH _{converted to parallel data. L: Contents are latched.}
ENABLE ^{Controls ON/OFF of LED (H: LED OFF)}
CLOCK
Clock signal for data transmission in the
shift-register. (L¡H: serial data is shifted.)
GND
Ground for signal
A0 to A3 Buffered input signal
RDATA
Input signal generated through 32-bit shift register
or buffer
Output
signal
(CN3)
GDATA
LATCH
ENABLE
Input signal generated through 32-bit shift register
or buffer
Buffered input signal
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.
LT1550ED
s Electrical Characteristics
(VCC=5V,VLED=4V,Ta=25˚C)
Parameter
Symbol MIN. TYP. MAX. Unit
Supply voltage for IC
Supply voltage for LED
VCC
VLED
4.75 5.0 5.25 V
3.75 4.0 4.25 V
IC current dissipation^*1
ICC
------ 140 200 mA
LED current dissipation^*1 ILED
------ 3.8 4.2 A
Input voltage
VIH
3.5 ------ ------ V
VIL
------ ------ 1.5 V
Input current
IIH
------ ------ 0.1 µA
IIL
------ ------ 0.12 mA
Clock frequency
fCLK
------ ------ 10 MHZ
Frame frequency
fFR
70 250 1 000 HZ
*1 Under the condition that dichromatic all dots are lit.
s Timing Chart
tsu
th
CLOCK
R&G
DATA
R&G
DATA(OUT)
LATCH
VD(n+1) data
td(C-L)
t dD
ENABLE
VD(n) data ON
ADDRESS
(A0 to A3)
VD(n)
td(L-A)
td(E-A)
s Block Diagram
t WCLK
t WL
VD(n+2) data
td(L-C)
t WENA
OFF ^{VD(n+1) data ON}
1/ f ENA
VD(n+1)
OFF
td(A-E)
Input/output circuit
331 473
HC367
OUT
A0
A1
A2
A3
RDATA
GDATA
LATCH
ENABLE
CLOCK
4 TO 16 DECODER
Pch FET DRIVER
IN
A0
A1
A2
A3
RDATA
GDATA
LATCH
ENABLE
CLOCK
16!16DOT!2
DICHROMATIC
LED MATRIX
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devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
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