LT1447M
LT1447M is Dot Matrix LED Unit for Outdoor Use (Lamp Type) manufactured by Sharp Corporation.
Features
¡No. of dots : 16!16dots ¡Outline dimensions : 144!144mm ¡Dot size : ø7.5mm ¡Dot pitch : 9.0mm ¡Radiation color : Yellow-green+Red(High-luminosity)dichromatic type ¡Driving method : 1/8 duty dynamic drive
LT1447M 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 t ON Topr Tstg P Rating -0.3 to +6.0 -0.3 to +5.5 -0.3 to VCC+0.3 1 -10 to +45 -25 to +85 35
(Ta=25˚C)
Unit V V V ms ˚C ˚C W s Electrical Characteristics
Parameter Supply voltage for IC Supply voltage for LED IC current dissipation LED current dissipation- 1
(VCC=5V,VLED=5V,Ta=25˚C) s Optical Characteristics
Parameter Symbol2 2θ1/2 Viewing angle Red Peak emission wavelength λp Yellow-green
(VCC=5V,VLED=5V,Ta=25˚C)
TYP 40 660 565
Unit ˚ nm
Symbol MIN. TYP. MAX. Unit V 5.25 5.0 VCC 4.75 V 5.25 5.0 4.5 VLED m A 350 270 -----ICC A 6.0 5.0 -----ILED V ----------3.5 VIH Input voltage V 1.5 ----------VIL µA 0.1 ----------IIH Input current m A 0.12 ----------IIL MHZ 3.0 ----------f CLK Clock frequency -----200 125 f FR HZ Frame frequency
- 1 Under the condition that dichromatic all dots are lit. s Timing Chart tsu CLOCK R&G DATA R&G DATA out LATCH 1/f OSC Internal ENABLE R&G ENABLE ADDRESS (A0 to A2) ON OFF td(E-L) td(E-L) td(L-E) s Luminance
Luminance is classified into 2 ranks shown below.
(VCC=5V,VLED=5V,Ta=25˚C) th t WCLK
Radiation color Red Yellow-green
Rank 1 600 750 2 800 1 000
VD(n+1) data
VD(n+2) data
Unit cd/m
2 t WL td D td(C-L) td(L-C)
OFF data ON
ON s Terminal Functions
Symbol VLED Power supply Vcc (CN1) GND1 GND2 A0 to A2 Connector 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 red LED RENABLE (H: LED OFF) Serial data input for red(H=ON, L=OFF) RDATA Shift from up to down in the unit HD16/HD31/HD0/HD15 Serial data input for...
