LT1448MA

Dot Matrix LED Unit for Outdoor Use LT1448MA(Lamp Type,Water-proof Type) s Features ¡No. of dots : 16!16dots ¡Outline dimensions : 160!160mm ¡Dot size : ø7.5mm(Using oval lamp) ¡Dot pitch : 9.9mm ¡Radiation color : Yellow-green+Red(High-luminosity)dichromatic type ¡Driving method : 1/4 duty dynamic drive LT1448MA 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 VDD VLED VI tON Topr Tstg P Rating -0.3 to +5.5 -0.3 to +5.0 -0.3 to Vcc+0.3 1 -10 to +45 -20 to +100 38 (Ta=25˚C) s Electrical Characteristics Parameter Supply voltage for IC Supply voltage for LED IC current dissipation*1 LED current dissipation*1 (VCC=5V,VLED=4.5V,Ta=25˚C) Unit V V V ms ˚C ˚C W s Optical Characteristics Symbol Parameter 2θ1/2 Viewing angle(Horizontal) Red λp Peak emission wavelength Yellow-green (VCC=5V,VLED=4.5V,Ta=25˚C) TYP 70 660 565 Unit ˚ nm Symbol MIN. TYP. MAX. Unit V 5.25 5.0 VDD 4.75 V 4.75 4.5 4.25 VLED mA 800 400 -----IDD A 7.0 6.0 -----ILED V ----------3.5 VIH Input voltage V 1.5 ----------VIL µA 0.1 ----------IIH Input current mA 0.12 ----------IIL MHZ 10 ----------fCLK Clock frequency 400 3 000 HZ 250 fFR Frame frequency *1 Under the condition that dichromatic all dots are lit. s Timing Chart t SU th t WCLK CLOCK s Luminance Luminance is classified into 2 ranks shown below. (VCC=5V,VLED=4.5V,Ta=25˚C) RDATA GDATA VD (N+1) VD (n+2) data t d (C-L) t...