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Dot Matrix LED Unit
Dot Matrix LED Unit f or Indoor Use LT1570VN/1570SN(Chip LED Type)
tWCLK
td (C-L)
tsu th
tWL
td (A-E) td (E-A) td (A-L)
td (L-C)
HD (n) HD (n+1) 1/fENA
tWENA
HD (n+2) data
HD (n+1) data
HD (n) data ON HD (n+1) data ON
ENABLE
LATCH
OFF
CLOCK
DATA
ADDRESS
(A0 to A3)
■ Timing Chart
Supply voltage for IC
Supply voltage for LED
IC current dissipation*1
LED current dissipation*1
Input voltage
VCC
VLED
ICC
ILED
VIH
4.75
3.75
------
------
3.5
5.0
4.0
25
1.2
------
Clock frequency fCLK ------ ------
VIL ------ ------
Input current IIH ------ ------
IIL ------ ------
Parameter Symbol MIN. TYP. 5.25
4.25
50
2.0
------
10
1.5
1
0.12
MAX. V
V
mA
A
V
MHz
Frame frequency fFR 70 250 1 000 Hz
V
µA
mA
Unit
(VCC=5V,VLED=5V,Ta=25˚C)
*1 Under the condition that dichromatic all dots are lit.
■ Absolute Maximum Ratings
■ Electrical Characteristics
■ Block Diagram
■ Features
¡No. of dots : 16✕16dots
¡Outline dimensions : 122✕122mm
¡Dot size : 3.2✕2.4mm
¡Dot pitch : 7.62mm
¡Radiation color : Amber(High-luminosity)LT1570VN
Sunset orange(High-luminosity)LT1570SN
¡LED ON : 1/8 duty drive
¡Input signal : 1/16 duty dynamic drive
Outline dimensions are shown on page 208, Fig.13.
Supply voltage for IC
Supply voltage for LED
Input voltage
Operating temperature
Storage temperature
Power dissipation
VCC
VLED
VI
Topr
Tstg
P
-0.3 to +5.5
-0.3 to +4.5
-0.3 to Vcc+0.3
-10 to +60
-20 to +70
9.5
V
V
V
˚C
Turn-on time tON 1ms
˚C
W
Parameter Symbol Rating Unit
(Ta=25˚C)
■Recommended Timing Conditions (Vcc=5.0V,Ta=25˚C)
473
331
HC367
A0
A1
A2
DATA
NC
LATCH
CLOCK
A3
ENABLE ENABLE
A3
IN
CLOCK
LATCH
NC
DATA
A2
A1
A0
AND LUMINANCE ADJUSTMENT CIRCUIT
AND LUMINANCE ADJUSTMENT CIRCUIT
Pch FET DRIVER
CHROMATIC
16✕16DOT
LED MATRIX
16BIT
16BIT
OUT
SHIFT-REGISTER. LATCH. DRIVER
SHIFT-REGISTER. LATCH. DRIVER
DUTY CONVERTER
(1/16 1/8 DUTY)
DATA selector
4 to 16 DECODER
DATA mix
DATA (odd line)
DATA (even line)
DATA (odd line) DATA (even line)
Input/output circuit
LT1570VN
Parameter Symbol TYP Unit
Luminance Lv 1 500 cd/g
2 000
30 ˚
LT1570VN
590
LT1570SN
612
LT1570VN
LT1570SN
Viewing angle 2θ1/2
■ Optical Characteristics (Vcc=5V,VLED=4V,Ta=25˚C)
Peak emission
wavelength λpnm
Parameter
Symbol Rating Unit Remarks
MIN. TYP. MAX.
Clock pulse width
tWCLK 50 ––– ––– ns
Latch pulse width
tWL 100 ––– ––– ns
Enable pulse width
tWENA 4 ––– ––– µs
Data setup time
tSU 60 ––– ––– ns
Data hold time
th 20 ––– ––– ns
Clock-latch time
td (C-L) 100 ––– ––– ns
Latch-clock time
td (L-C) 100 ––– ––– ns
Enable-address time
td (E-A) 2 ––– ––– µs
Address-enable time
td (A-E) 2 ––– ––– µs
Latch-address time
td (A-L) 0 ––– ––– µs
Frame frequency
fFR 70 250 1 000 Hz
Enable frequency
fENA ––– ––– 16 kHz