LT1461ED Datasheet, PDF (1/2 Pages) Sharp Electrionic Components – Dot Matrix LED Unit for Indoor Use (Chip On Board Type)

Dot Matrix LED Unit for Indoor Use LT1461ED(Chip On Board Type)
s Features
¡No. of dots : 16!16dots
¡Outline dimensions : 64!64mm
¡Dot size : ø2.8mm
¡Dot pitch : 4.0mm
¡Radiation color : Yellow-green+Red(dichromatic type)
¡Driving method : 1/16 duty dynamic drive
LT1461ED
s Absolute Maximum Ratings
Parameter
Symbol
Supply voltage for IC
VCC
Supply voltage for LED
VLED
Input voltage
VI
Turn-on time
tON
Operating temperature
Topr
Storage temperature
Tstg
Power dissipation
P
Rating
6.0
6.0
-0.3 to +5.5
1
-10 to +45
-20 to +70
13
(Ta=25˚C)
Unit
V
V
V
ms
˚C
˚C
W
s Optical Characteristics
Parameter
Symbol
Red
Luminance _Yellow-green
Viewing angle
Peak emission wavelength ^Red
Yellow-green
LV
2θ¹/2
λp
(VCC=5V,VLED=5V,Ta=25˚C)
TYP
Unit
90
cd/m²
90
80
˚
635
565
nm
s Terminal Functions
Connector Symbol
Power
supply
(CN1)
VLED
VCC
GND1
GND2
A0 to A3
RDATA
GDATA
Function
Supply voltage for LED (+5V)
Supply voltage for IC (+5V)
Ground for IC
Ground for LED
Address specification signal for row driver
Serial data input for red (H=ON, L=OFF)
Serial data input for yellow-green (H=ON, L=OFF)
Input LATCH ^{Latch signal of display data. L: Contents are latched.}
signal
(CN2) _{ENABLE Controls ON/OFF of LED (H: LED OFF)}
Clock signal for data transmission in the shift-
CLOCK _{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 16-bit shift register
or buffer
Output
signal
GDATA
Input signal generated through 16-bit shift register
or buffer
(CN3) _{LATCH Buffered input signal}
ENABLE 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=5V,Ta=25˚C)
Parameter
Symbol MIN. TYP. MAX. Unit
Supply voltage for IC
VCC 4.75 5.0 5.25 V
Supply voltage for LED
VLED ------ 5.0 5.25 V
IC current dissipation^*1
LED current dissipation^*1
Input voltage
Input current
Clock frequency
Frame frequency
ICC
------ 50 ------ mA
ILED ------ 1.8 ------ A
VIH
3.5 ------ ------ V
VIL
------ ------ 1.5 V
IIH
------ ------ 0.1 µA
IIL
------ ------ 0.12 mA
fCLK ------ ------ 4 MHZ
fFR
80 ------ 625 HZ
*1 Under the condition that dichromatic all dots are lit.
s Timing Chart
tsu th
CLOCK
RDATA
GDATA
RDATAout
GDATAout
LATCH
ENABLE
ADDRESS
(A0~A3)
HD(n+1)DATA
tdD
td(C-L)
HD(n)DATA ON
td(E-L)
HD(n)
td(E-A)
td(L-A)
tWCLK
HD(n+2)DATA
tWL
td(L-C)
tEN
OFF
HD(n+1)DATA ON
td(L-E)
HD(n+1)
td(A-E)
s Block Diagram
Vcc
47K
tOFF
CN2
A0
A1
A2
A3
RDATA
GDATA
CLK
LATCH
ENABLE
HC367
Input circuit
Decoder
Driver
LED
Matrix
VR1
G.ADJ
VR2
G.ADJ
Mono-Multi
OSC
CN3
A0
A1
A2
A3
RDATA
GDATA
CLK
LATCH
ENABLE
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