lightkey spec no: ds10121844 rev : a.4 checke d: emil y zh ou appr oved: m.h. lin p a ge: 1/3 http://www .l tkey .c om tel: 0086-574 -863 222 82 da te: jul/20/201 1 dat a shee t of 4.00 inch 4x4 dot matri x led displa y lm40044 a/b series ? 4.00 inch 4x4 dot matrix led displa y at t e n t i o n ob ser ve pr ec a u t i o n s fo r h a ndl i n g e l e c tro s t a ti c di s c h a rg e sen s i t i v e d evi c e s f e a t u r e s ? 108.80 mm (4.00 inch) dig i t high ? d o t s i z e : d i a m e t e r 2 0 . 0 0 m m ? pitch: 27.20 mm ? w i d e v i e w i n g a n g l e ? r a n g e o f e m i t t e d c o l o r s ? i . c . c o m p a t i b l e ? l o w p o w e r c o n s u m p t i o n ? w h i t e d o t , g r e y o r b l a c k f a c e available options ? alt e rnat iv e emi t t i ng lumi nosit y: st andar d or hi gh bri ght n e ss versio n ? alt e rnat iv e emi t t ed color ? alt e rnat iv e dot color ? alt e rnat iv e f a ce ? bot h cc an d c a versions ar e avail a b l e ? crop ped t e rmi nal p i ns ? rohs com p li a n t package di mensions 5.08 3 = 1 5 . 24 ?0 .8 0 6 . 4 9 0 . 7 1 12 3 4 1 2 3 4 co l . ro w 27 . 2 3 = 8 1 . 6 6 . 1 8 = 3 2 . 7 2 1 0 8. 8 ( 4. 3 5 ) ) 5 3 . 4 ( 8 . 8 0 1 ?2 0 . 0 ( 0. 8 0 ) pi n 1 notes: 1. all dim ens ion s are in millimet ers (inches), t o lerance is + 0.25mm (0.01inch) u n less other w i se noted. 2. specific ation s are subj ect to change w i thout notice. 3. t he ga p between the reflector and pcb s hall not ex ceed 0.2 5 mm.
lightkey spec no: ds10121844 rev : a.4 checke d: emil y zh ou appr oved: m.h. lin p a ge: 2/3 http://www .l tkey .c om tel: 0086-574 -863 222 82 da te: jul/20/201 1 dat a shee t of 4.00 inch 4x4 dot matri x led displa y internal circuit diagram lm400 44 a (common ca thode ro w ) lm40044 b (common anod e ro w ) 8 8 7 7 3 3 4 4 1 1 2 2 3 3 4 4 5 5 6 6 2 2 1 1 1 1 2 2 3 3 4 4 pi n no . pi n no . pi n no . pi n no . . l o c . l o c selection guide part no. chip i v @i f =20ma one do t common cathode ro w common anod e ro w m a t e r i a l c o l o r wl d m i n . t y p. ld40 044a r ld40 044b r gaalas super red 640 24 30 ld40 044a d ld40 044b d gaalas hi-red 640 54 75 ld40 044ao ld40 044bo g a a s p oran ge 625 21 27 ld40 044ay ld40 044by g a a s p yellow 588 24 30 ld40 044ag ld40 044bg gap gree n 568 21 27 ld40 044a ur ld40 044b ur algainp ultra r e d 640 90 135 ld40 044a uo ld40 044b uo algainp ultra o r an ge 625 135 180 ld40 044a ua ld40 044b ua algainp ultra ambe r 605 90 135 ld40 044a uy ld40 044b uy algainp ultra yello w 595 90 135 ld40 044a ug ld40 044b ug algainp ultra g r ee n 573 90 135 ld40 044ap g ld40 044bp g ingan pure g r een 525 360 900 ld40 044a ub ld40 044b ub ingan ultra blue 470 90 135 ld40 044a uw ld40 044b uw smd ultra white \ 300 360 u n i t : \ \ \ n m mc d mc d
lightkey spec no: ds10121844 rev: a.4 checked: emil y zhou approved: m.h. lin page: 3/3 http://www.ltkey.com tel: 0086-574-86322282 date: jul/20/2011 datasheet of 4.00 inch 4x4 dot matrix led display electrical characteristics & absolute maximum ratings parameter electrical optical characteristics [1] absolute maximum ratings [1] v f @ if=20ma [2] emitted color per dot typ. max. reverse current vr=5v power dissipation dc forward current peak forward current [3] super red per dot 7.2 8.8 50 240 25 100 hi-red per dot 7.2 8.8 50 240 25 100 orange per dot 8.4 10 50 320 30 100 yellow per dot 8.4 10 50 320 30 100 green per dot 8.8 10 50 320 30 100 ultra red per dot 7.6 10.4 50 240 30 100 ultra orange per dot 8 10.4 50 260 30 100 ultra amber per dot 8 10.4 50 260 30 100 ultra yellow per dot 8 10.4 50 260 30 100 ultra green per dot 8.4 10.4 50 300 30 100 pure green per dot 14 16 50 440 30 100 ultra blue per dot 14 16 50 480 30 100 ultra white per dot 14 16 50 480 30 100 unit: \ v v ua mw ma ma notes: 1. at ta = 25 c. 2. forward voltage at forward current = 20ma. 3. peak forward current at 1/10 duty cycle, 0.1ms pulse.
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