lightkey spec no: ds10121583 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 0.70 inch 5x7 dot matrix led display lm7057a/b series - 0.70 inch 5x7 dot matrix led display features ? 17.80mm (0.70inch) digit high ? dot size: diameter 1.90mm ? pitch: 2.54mm ? wide viewing angle ? range of emitted colors ? i.c. compatible ? low power consumption ? white segment ? rohs compliant package dimensions 1 . 9 0 6 . 3 0 0 . 5 0 1 7 . 8 0 2 . 5 4 * 6 = 1 5 . 2 4 12.70 0.51 7.62 6 . 3 0 2.54*4=10.16 pin 1 2.54*5=12.70 col. 1234 2 7 6 4 5 3 row 5 1 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: ds10121583 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 0.70 inch 5x7 dot matrix led display internal circuit diagram lm7057a (common cathode row) lm7057b (common anode row) row 3 2 5 7 6 4 1 6 5 9 4 2 3 no. pin 2 11 12 pin no. col. 1 1 10 3 7 4 8 5 7 6 5 4 6 5 4 9 1 2 3 row 11 2 12 pin no. col. no. no. pin 1 1 3 2 10 3 7 4 8 5 selection guide part no. chip iv@if=20ma one dot common cathode row common anode row material color wld min. typ. lm7057ar lm7057br gaalas super red 640 8 10 lm7057ad lm7057bd gaalas hi-red 640 18 25 lm7057ao lm7057bo gaasp orange 625 7 9 lm7057ay lm7057by gaasp yellow 588 8 10 lm7057ag lm7057bg gap green 568 7 9 lm7057aur lm7057bur algainp ultra red 640 30 45 lm7057auo lm7057buo algainp ultra orange 625 45 60 lm7057aua lm7057bua algainp ultra amber 605 30 45 lm7057auy lm7057buy algainp ultra yellow 595 30 45 lm7057aug lm7057bug algainp ultra green 573 30 45 lm7057apg lm7057bpg ingan pure green 525 120 300 lm7057aub lm7057bub ingan ultra blue 470 30 45 lm7057auw lm7057buw ingan ultra white \ 100 120 unit: \ \ \ nm mcd mcd
lightkey spec no: ds10121583 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 0.70 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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