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Dot Matrix LED Unit f or Indoor Use LT1580 Series(Chip LED Type)
■ Electrical Characteristics (Vcc=5V,VLED=4V,Ta=25˚C)
■ Timing Chart
■ Block Diagram
■ Features
¡No. of dots : 16✕32dots
¡Outline dimensions : 40✕80mm
¡Dot size : 1.6✕0.8mm
¡Dot pitch : 2.5mm
¡Radiation color : Yellow-green/LT1580E, Amber (High-
luminosity) /LT1580V, Red/LT1580D, Red
(High-luminosity) /LT1580U
¡Driving method : 1/16 duty dynamic drive
Outline dimensions are shown on page 205, Fig.1.
■ Optical Characteristics (Ta=25˚C)
tWCLK
td (C-L)
tsu th
tWL
td (A-E)td (E-A)
td (L-A)
td (L-C)
HD (n) HD (n+1)
HD (n +1) data
HD (n+1) data
HD (n) data ON HD (n+1) data ON OFF
ENABLE
LATCH
OFF
CLOCK
DATA
ADDRESS
(A0 to A3)
tWENA
1 / f ENA
473
331
HC541
A0
A1
A2
DATA
NC
LATCH
CLOCK
A3
ENABLE ENABLE
A3
IN
CLOCK
LATCH
NC
DATA
A2
A1
A0
DICHROMATIC
16✕16DOT ✕2
LED MATRIX
32BIT
OUT
4 TO 16 DECODER
PNP DRIVER
Detailed I/O circuit
AND LUMINANCE ADJUSTMENT CIRCUIT
SHIFT-REGISTER. LATCH. DRIVER
Parameter Symbol MIN. TYP. MAX. Unit
Supply voltage for IC VCC 4.75 5.0 5.25 V
Supply voltage for LED VLED 3.75 4 4.25 V
IC current
dissipation
LT1580E
ICC
––– 30 50
mA
LT1580V
––– 30 60
LT1580D ––– 30 50
LT1580U ––– 30 50
LED current
dissipation
LT1580E
ILED
––– 1.0 1.7
A
LT1580V
––– 0.8 1.3
LT1580D ––– 1.0 1.7
LT1580U ––– 1.0 1.7
Input voltage VIH 3.5 ––– ––– V
VIL ––– ––– 1.5 V
Input current IIH ––– ––– 1 µA
IIL ––– ––– 0.12 mA
Clock frequency fCLK ––– ––– 10 MHZ
Frame frequency fPR 70 250 1000 HZ
Parameter Symbol TYP Unit
Luminance Lv
130
cd/g
˚
400
LT1580D 80
LT1580U 400
LT1580E 150
LT1580V
150
LT1580D 150
LT1580U 150
LT1580E 565
nm
LT1580V
591
LT1580D 635
LT1580U 660
LT1580E
LT1580V
Viewing
angle 2θ1/2
Peak emission
wavelength
λp
■Recommended Timing Conditions (Vcc=5.0V,Ta=25˚C)
Parameter
Symbol Rating Unit Remarks
MIN. TYP. MAX.
Latch pulse width
tWL 50 ––– ––– ns
Enable pulse width
tWENA 4 ––– ––– µs
Data setup time
tSU 50 ––– ––– ns
Data hold time
th 30 ––– ––– ns
Clock-latch time
td (C-L) 50 ––– ––– ns
Latch-clock time
td (L-C) 30 ––– ––– ns
Enable-address time
td (E-A) 2 ––– ––– µs
Address-enable time
td (A-E) 6 ––– ––– µs
Latch-address time
td (L-A) 0 ––– ––– µs
■ Absolute Maximum Ratings
VCC
VLED
VI
tON
Topr
Tstg
P
-0.3 to +5.5
-0.3 to +4.5
-0.3 to VCC+0.3
1
-10 to +60
-20 to +70
8
Supply voltage for IC
Supply voltage for LED
Input voltage
Turn-on time
Operating temperature
Storage temperature
Power dissipation
Symbol RatingParameter
V
V
V
ms
˚C
˚C
W
Unit
(Ta=25˚C)
Clock pulse width
tWCLK 50 ––– ––– ns
Frame frequency
fFR 70 250 1 000 HZ
Enable frequency
fENA ––– ––– 16 kHZ
LT1580E
