lightkey spec no: ds10121799 rev: a.4 checked: emil y zhou approved: m.h. lin page: 1/3 http://www.ltkey.com tel: 0086-574-86322282 date: jul/20/2011 datasheet of 1.20 inch 5x7 dot matrix led display lm12057a/b series ? 1.20 inch 5x7 dot matrix led display features ? 39.10mm (1.20inch) digit high ? dot size: diameter 3.00mm ? pitch: 4.6mm ? wide viewing angle ? range of emitted colors ? i.c. compatible ? low power consumption ? white segment ? rohs compliant package dimensions 1 * / $ 0 - 3 0 8 notes: 1. all dimensions are in millimeters (inches), tolerance is + 0.25mm (0.01inch) unless other wise noted. 2. specifications are subj ect to change without notice. 3. the gap between the reflector and pcb shall not exceed 0.25mm. attention observe precautions for handling electrostatic discharge sensitive devices available options ? alternative emitting luminosity: standard or high brightness version ? alternative emitted color ? alternative segment color ? alternative font ? common cathode is available ? cropped terminal pins
lightkey spec no: ds10121799 rev: a.4 checked: emil y zhou approved: m.h. lin page: 2/3 http://www.ltkey.com tel: 0086-574-86322282 date: jul/20/2011 datasheet of 1.20 inch 5x7 dot matrix led display internal circuit diagram lm12057a (common cathode row) lm12057b (common anode row) 3 0 8 1 * / / 0 1 * / / 0 $ 0 - 3 0 8 1 * / / 0 1 * / / 0 / 0 $ 0 - selection guide part no. chip iv@if=20ma one dot common cathode row common anode row material color wld min. typ. lm12057ar lm12057br gaalas super red 627 8 10 lm12057ad lm12057bd gaalas hi-red 627 18 25 lm12057ao lm12057bo gaasp orange 610 7 9 lm12057ay lm12057by gaasp yellow 588 8 10 lm12057ag lm12057bg gap green 568 7 9 lm12057aur lm12057bur algainp ultra red 627 30 45 lm12057auo lm12057buo algainp ultra orange 610 45 60 lm12057aua lm12057bua algainp ultra amber 605 30 45 lm12057auy lm12057buy algainp ultra yellow 595 30 45 lm12057aug lm12057bug algainp ultra green 573 30 45 lm12057apg lm12057bpg ingan pure green 525 120 300 lm12057aub lm12057bub ingan ultra blue 470 30 45 lm12057auw lm12057buw ingan ultra white \ 100 120 unit: \ \ \ nm mcd mcd
lightkey spec no: ds10121799 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 1.20 inch 5x7 dot matrix led display electrical characteristics & absolute maximum ratings electrical characteristics [1] absolute maximum ratings [1] v f @ i f =20ma [2] color typ. max. reverse current vr=5v power dissipation dc forward current peak forward current [3] super red per dot 1.8 2.2 30 60 25 100 hi-red per dot 1.8 2.2 30 60 25 100 orange per dot 2.1 2.5 30 80 30 100 yellow per dot 2.1 2.5 30 80 30 100 green per dot 2.2 2.5 30 80 30 100 ultra red per dot 1.9 2.6 30 60 30 100 ultra orange per dot 2.0 2.6 30 65 30 100 ultra amber per dot 2.0 2.6 30 65 30 100 ultra yellow per dot 2.0 2.6 30 65 30 100 ultra green per dot 2.1 2.6 30 75 30 100 pure green per dot 3.5 4.0 30 110 30 100 ultra blue per dot 3.5 4.0 30 120 30 100 ultra white per dot 3.5 4.0 30 120 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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