202
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Symbol
VCC
VLED
ICC
ILED
VIH
VIL
IIH
IIL
fCLK
fFR
MIN.
4.75
7.0
------
------
3.5
------
------
------
------
250
TYP.
5.0
7.5
200
5.5
------
------
------
------
------
400
MAX.
5.25
7.75
500
7.0
------
1.5
0.1
0.12
10
3 000
Unit
V
V
mA
A
V
V
µA
mA
MHZ
HZ
(VCC=5V,VLED=5V,Ta=25˚C)
*1 Under the condition that dichromatic all dots are lit.
Supply voltage for IC
Supply voltage for LED
IC current dissipation*1
LED current dissipation*1
Input voltage
Input current
Clock frequency
Frame frequency
Parameter
t
VD(n+2) data
tdD
tsu th
VD(n+1) data
VD(n+1) data ON
VD(n) data ON
VD(n) VD(n+1)
tWENA
td(C-L) td(L-C)
tWL
WCLK
ON
ON ON ON
ON
t=1/fosc
ON ON
CLOCK
RDATA
GDATA
RDATA out
GDATA out
GENABLE
ADDRESS
ENABLE
LATCH
RENABLE
(A0 to A2)
Internal
OFF OFF
td(A-E)
td(E-A)
td(L-E)
td(E-L)
MONO-MULTI
A0
A1
A2
RDATA
GDATA
GENABLE
CLOCK
GND1
Luminance adjustment circuit
A0
A1
A2
RDATA
GDATA
LATCH
RENABLE
GENABLE
CLOCK
GND1
RENABLE
GADJ RADJ
H
D31
H D0 H D31
H D0
H D16 H D16
H D15 H D15 SELECTOR
OUT IN
OSC
3 to 8 DECODER
32 BIT SHIFT REGISTER/LATCH/DRIVER
32 BIT SHIFT REGISTER/LATCH/DRIVER
32 BIT SHIFT REGISTER/LATCH/DRIVER
LATCH
Input/output circuit
331
HC367
473
PNP DRIVER
Dot matrix LED
16✕16
GATE
■ Absolute Maximum Ratings ■ Electrical Characteristics
■ Timing Chart
■ Block Diagram
Dot Matrix LED Unit f or Outdoor Use LT1545M(Lamp Type,W ater -proof Type)
■ 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
Outline dimensions are shown on page 207, Fig.11.
■ Optical Characteristics
(Ta=25˚C)
*1 VI<Vcc at Vcc<=5
*2 When dichromatic all dots are lit, duty ratio=1/16.
Supply voltage for IC
Supply voltage for LED
Input voltage*1
Turn-on time
Operating temperature
Storage temperature
Power dissipation
Parameter VCC
VLED
V1
tON
Topr
Tstg
P
Symbol -0.3 to +6.0
-0.3 to +8.0
-0.3 to VCC+0.3
1
-20 to +75*2
-25 to +100
59
Rating V
V
V
ms
˚C
˚C
W
Unit
Symbol
2θ1/2
λp
TYP
30
660
565
Unit
˚
nm
(VCC=5V,VLED=7.5V,Ta=25˚C)
Parameter
Viewing angle
Peak emission wavelength
Red
Yellow-green
■ Luminance
1
1 500
1 500
2
1 800
1 800
(VCC=5V,VLED=7.5V,Ta=25˚C)
Rank
Luminance is classified into 2 ranks shown below.It is adjustable by
variable registers.
Radiation color
Red
Yellow-green
Unit
cd/g
LT1545M
■ Recommended Timing Conditions (Vcc=5.0V,Ta=25˚C)
Parameter
Symbol Rating Unit Remarks
Min. Typ. Max.
Clock pulse width
tWCLK 50 ––– ––– ns
Latch pulse width
tWL 50 ––– ––– ns
Enable pulse width
tWENA 4 ––– ––– µs
Data setup time
tSU 35 ––– ––– ns
Data hold time
th 25 ––– ––– ns
Clock-latch time
td (C-L) 50 ––– ––– ns
Latch-clock time
td (L-C) 60 ––– ––– ns
Data output delay time
tdD––– 91 ––– ns
RDATA,GDATA
Enable-address time
td (E-A) 2 ––– ––– µs
Propagation delay time
tPLH,tPHL ––– 26 ––– ns
Except data terminal
Oscillation frequency
fOSC ––– 300 ––– kHz
Frame frequency
fOSC 250 400 3 000 Hz
Enable frequency
fENA ––– ––– 30 kHz *
Address-enable time
td (A-E) 6 ––– ––– µs
Address-latch time
td (A-L) 0 ––– ––– µs
* When enable frame frequency is close to oscillation frequency, it causes flickering and
unevenness of luminance.