198 notice in the absence of confirmation by device specification sheets,sharp takes no responsibility for any defects that may occur in equi pment using any sharp devices shown in catalogs,data books,etc.contact sharp in order to obtain the latest device specification sheets before using any sharp device. internet internet address for electronic components group http://www.sharp.co.jp/ecg/ supply voltage for ic supply voltage for led input voltage operating temperature storage temperature v cc v led v i t opr t stg -0.3 to +6.0 -0.3 to +5.5 -0.3 to vcc+0.3 -10 to +65 *1 -20 to +85 v v v ms turn-on time t on 1 ?c ?c power dissipation p 22 w parameter rating unit (ta=25?c) *1 when dichromatic all dots are lit, duty ratio=1/8. symbol supply voltage for ic supply voltage for led ic current dissipation led current dissipation *1 signal input voltage v cc v led i cc i led v ih 4.75 4.5 ------ ------ 3.5 5.0 5.0 15 3.5 ------ clock frequency f clk ------ ------ v il ------ ------ signal input current i ih ------ ------ i il ------ ------ parameter symbol min. typ. 5.25 5.25 40 3.9 ------ 3.0 1.5 0.1 0.12 max. v v ma a v mhz frame frequency f fr 125 200 400 hz v a ma unit (v cc =5v,v led =5v,ta=25?c) *1 under the condition that dichromatic all dots are lit. n absolute maximum ratings n electrical characteristics (v cc =5v,v led =5v,ta=25?c) radiation color red yellow-green 2 550/1 000 450/1 000 unit cd/ g rank 1 450/700 330/700 each figure in the table is the one of LT1455M/lt1456m in sequence. luminance is classified into 2 ranks shown below. (v cc= 5v,v led= 5v,ta=25?c) typ. 50/40 660 565 unit ? nm symbol 2 q 1 / 2 red yellow-green l p parameter viewing angle peak emission wavelength each figure in the table is the one of LT1455M/lt1456m in sequence. n timing chart dot matrix led unit for indoor/outdoor use LT1455M/lt1456m(lamp type) n features no. of dots : 16 5 16dots outline dimensions : 96.0 5 96.0mm dot size : ?.0mm dot pitch : 6.0mm radiation color : yellow-green+red(high-luminosity)dichromatic type driving method : 1/8 duty dynamic drive outline dimensions are shown on page 206, fig.8. n optical characteristics n block diagram n luminance t v d (n+2) data td d tsu th v0(n+1) data v d (n+1) data on v d (n) data on v d( n) vd(n+1) t wena td(c-l) td(l-c) t wl wclk on on on on on t=1/f osc on on clock rdata gdata rdataout gdataout genable address enable latch renable (a0 to a2) internal off off td(a-e) td(e-a) td(l-e) td(e-l) luminance adjustment circuit input/output circuit vr2 vr1 473 331 hc367 hc123 osc mono-multi matrix v d15 v d0 hd0 hd16 hd31 hd31 hd15 hd15 hd16 hd0 16bit shift-register latch and driver 16bit shift-register latch and driver 16bit shift-register latch and driver 16bit shift-register latch and driver pnp driver 3 to 8 decoder 16 5 16 dot led dichromatic a0 out a1 a2 clock genable latch gdata rdata renable a0 a1 a2 clock genable latch gdata rdata renable LT1455M lt1456m n recommended timing conditions (vcc=5.0v,ta=25?c) parameter symbol rating unit remarks min. typ. max. clock pulse width t wclk 100 ns latch pulse width t wl 80 ns enable pulse width t wena 2 ? data setup time t su 80 ns data hold time th 40 ns clock-latch time td (c-l) 80 ns latch-clock time td (l-c) 150 ns data output delay time td d 85 150 ns rdata,gdata enable-latch time td (e-l) 2 ? latch-enable time td (l-e) 2 ? enable-address time td (e-a) 2 ? propagation delay time tp lh ,tp hl 15 40 ns except data terminal address-enable time td (a-e) 20 ? oscillation frequency f osc 25 khz enable frequency f ena 3.2 khz * frame frequency f fr 125 200 400 hz * when enable frame frequency is close to oscillation frequency, it causes flickering and unevenness of luminance.
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