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Dot Matrix LED Unit for Indoor/Outdoor Use LT1455M/LT1456M(Lamp Type)
s Features
No. of dots : 16!16dots Outline dimensions : 96.0!96.0mm Dot size : o5.0mm Dot pitch : 6.0mm Radiation color : Yellow-green+Red(High-luminosity)dichromatic type Driving method : 1/8 duty dynamic drive
LT1455M LT1456M
s Absolute Maximum Ratings
Parameter Supply voltage for IC Supply voltage for LED Input voltage Turn-on time Operating temperature Storage temperature Power dissipation Symbol VCC VLED VI tON Topr Tstg P Rating -0.3 to +6.0 -0.3 to +5.5 -0.3 to Vcc+0.3 1 -10 to +65 -20 to +85 22
(Ta=25C)
s Electrical Characteristics
Parameter Supply voltage for IC Supply voltage for LED IC current dissipation LED current dissipation*1
(VCC=5V,VLED=5V,Ta=25C)
Unit V V V ms C C W
s Optical Characteristics
(VCC=5V,VLED=5V,Ta=25C)
Parameter Symbol TYP. Unit Viewing angle 50/40 21/2 660 Red nm Peak emission wavelength p 565 Yellow-green Each figure in the table is the one of LT1455M/LT1456M in sequence.
Symbol MIN. TYP. MAX. Unit V 5.0 5.25 VCC 4.75 V 5.0 5.25 4.5 VLED mA 15 40 -----ICC 3.9 -----ILED A 3.5 ----------3.5 VIL V Signal input voltage VIH ----------1.5 V IIL ----------0.1 A Signal input current IIH ----------0.12 mA MHz Clock frequency fCLK 3.0 ----------Frame frequency fFR 125 200 400 Hz *1 Under the condition that dichromatic all dots are lit.
s Timing Chart
tsu CLOCK RDATA GDATA V0(n+1) data RDATAout GDATAout tdD LATCH t=1/f osc Internal ENABLE RENABLE GENABLE ADDRESS (A0~A2) ON ON ON ON ON OFF ON ON OFF
td(L-E)
s Luminance
Luminance is classified into 2 ranks shown below.
(VCC=5V,VLED=5V,Ta=25C)
th
t WCLK
VD(n+2) data td(C-L) td(L-C) tWL
Radiation color Red Yellow-green
Rank 1 450/700 330/700 2 550/1000 450/1000
Unit cd/m
2
Each figure in the table is the one of LT1455M/LT1456M in sequence.
s Terminal Functions
Symbol VLED Power supply VCC (CN1) GND1 GND2 A0 to A2 RENABLE GENABLE Connector RDATA Input signal (CN2) GDATA LATCH CLOCK Function Supply voltage for LED(+5V) Supply voltage for IC(+5V) Ground for IC Ground for LED Address specification signal for column driver Controls ON/OFF of each color of LED (H: LED OFF) Serial data input for red(H=ON, L=OFF) Shift from up to down in the unit HD16/HD31/HD0/HD15 Serial data input for yellow-green(H=ON, L=OFF) Shift from up to down in the unit HD16/HD31/HD0/HD15 Latch signal of display data H: Serial data is converted to parallel data.L: Contents are latched. Clock signal for data transmission in the shiftregister.(L/H: serial data is shifted.)
VD(n) data ON
td(E-L)
VD(n+1) data ON
tWENA
VD(n) td(E-A)
VD(n+1)
td(A-E)
s Block Diagram
Luminance adjustment circuit
VR1 VR2
Input/output circuit
473 331 HC367
OSC
MONO-MULTI HC123
OUT
A0 A1 A2 RENABLE RDATA GDATA LATCH GENABLE CLOCK A0 A1 A2 RENABLE RDATA GDATA LATCH GENABLE CLOCK
3 TO 8 DECODER PNP DRIVER VD0
16BIT SHIFT-REGISTER LATCH AND DRIVER
HD16
16!16 DOT LED
HD31 HD16 HD15 HD0
Output signal Input signal generated through 32-bit shift register (CN3) GDATA LATCH Buffered input signal GENABLE Buffered input signal Buffered input signal CLOCK 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
(Notice)
RDATA
Input signal generated through 32-bit shift register
16BIT SHIFT-REGISTER LATCH AND DRIVER
DICHROMATIC MATRIX
HD31 HD15
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16BIT SHIFT-REGISTER LATCH AND DRIVER
16BIT SHIFT-REGISTER LATCH AND DRIVER
Ground for signal (Connected to ground for IC) GND1 A0 to A2 Buffered input signal RENABLE Buffered input signal
VD15
HD0
8
95.73
(256-o5.0)
(P6.0!1590.0)
HD0 HD16
Data shift direction
95.70.3 P6.0!15=90.0)
HD15 VD0
VD15
13.5
12.3
Data shift direction
HD31
15.0
Pin connection
CN1(Power supply)
4-M3(Depth6MIN)
95.5 78.0 (5.0) (4.0)
1 2 3 4
VLED VCC GND1 GND2
CN2(Input signal)
1 2 3 4 5 6 7 8 9 10 A0 A1 A2 RENABLE RDATA GDATA LATCH GENABLE CLOCK GND1
CN3(Output signal)
1 2 3 4 5 6 7 8 9 10 A0 A1 A2 RENABLE RDATA GDATA LATCH GENABLE CLOCK GND1
95.5 78.0 (17.0) 3.96!3=11.88)
CN3 10 1
CN2 10 1 4
1 CN1 VR1 VR2
(26.0)
LT1455M/LT1456M
(2.5!9=22.5)

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