LightKey Datasheet of 1.20 inch 5x7 Square Dot Matrix LED Display LM12257A/B Series – 1.20 inch 5x7 Square Dot Matrix LED Display ATTENTION OBSERVE PRECAUTIONS FOR HANDLING ELECTROSTATIC DISCHARGE SENSITIVE DEVICES Features Available options ¾ 28.60 mm (1.2 inch) matrix height ¾ ¾ Dot size: 4x4mm ¾ Pitch: 4.1mm ¾ Wide viewing angle ¾ Range of emitted colors ¾ I.C. compatible ¾ Low power consumption ¾ White dot, grey or black face ¾ RoHS compliant Alternative emitting luminosity: Standard or high brightness version ¾ ¾ ¾ ¾ ¾ Alternative emitted color Alternative dot and face color Alternative font Both CA and CC versions are available Cropped terminal pins 20 . 5 0 2 8 . 6( 1 . 1 . 14 ) 3.0(0.12 ) 4 . 1× 6= 2 4. 6 3 . 0( 0 . 1 2 ) Package Dimensions 4.1×4=16.4 20.3(0.81 ) COL. ROW 1 2 1 3 4 5 1 0. 3 2 3 4 5 Ø0.51 6 7 2.54×6=15.24 Notes: 1. All dimensions are in millimeters (inches), Tolerance is + 0.25mm (0.01inch) unless other wise noted. 2. Specifications are subject to change without notice. 3. The gap between the reflector and PCB shall not exceed 0.25mm. SPEC NO: DS10121810 REV: A.4 HTTP://WWW.DISPLAY-LEDS.COM CHECKED: Emily Zhou APPROVED: M.H. Lin TEL: 0086-574-86322282 PAGE: 1/3 DATE: Jul/20/2011 LightKey Datasheet of 1.20 inch 5x7 Square Dot Matrix LED Display Internal Circuit Diagram LM12257B (Common Anode Row) COL. 1 PIN NO. 13 PIN NO. 2 3 4 5 3 4, 11 10 6 LM12257A (Common Cathode Row) COL. 1 PIN NO. 13 PI N NO. 1 9 1 9 2 14 2 14 3 8 3 8 4 4 5,12 2 3 4 5 3 4,11 10 6 5,12 5 1 5 1 6 7 6 7 7 2 7 2 CODE N CODE M Selection Guide Part No. Chip Common Common Cathode Row Anode Row Material Iv@IF=20mA Color One Dot WLD Min. Typ. LM12257AR LM12257BR GaAlAs Super Red 640 8 10 LM12257AD LM12257BD GaAlAs Hi-Red 640 18 25 LM12257AO LM12257BO GaAsP Orange 625 7 9 LM12257AY LM12257BY GaAsP Yellow 588 8 10 LM12257AG LM12257BG GaP Green 568 7 9 LM12257AUR LM12257BUR AlGaInP Ultra Red 640 30 45 LM12257AUO LM12257BUO AlGaInP Ultra Orange 625 45 60 LM12257AUA LM12257BUA AlGaInP Ultra Amber 605 30 45 LM12257AUY LM12257BUY AlGaInP Ultra Yellow 595 30 45 LM12257AUG LM12257BUG AlGaInP Ultra Green 573 30 45 LM12257APG LM12257BPG InGaN Pure Green 525 120 300 LM12257AUB LM12257BUB InGaN Ultra Blue 470 30 45 LM12257AUW LM12257BUW SMD Ultra White \ 100 120 Unit: \ \ \ nm mcd mcd SPEC NO: DS10121810 REV: A.4 HTTP://WWW.DISPLAY-LEDS.COM CHECKED: Emily Zhou APPROVED: M.H. Lin TEL: 0086-574-86322282 PAGE: 2/3 DATE: Jul/20/2011 LightKey Datasheet of 1.20 inch 5x7 Square Dot Matrix LED Display Electrical Characteristics & Absolute Maximum Ratings Electrical Absolute Maximum Ratings[1] [1] Characteristics Color VF@ Reverse IF=20mA[2] Current Typ. Max. VR=5V Power Dissipation DC Peak Forward Forward Current 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. SPEC NO: DS10121810 REV: A.4 HTTP://WWW.DISPLAY-LEDS.COM CHECKED: Emily Zhou APPROVED: M.H. Lin TEL: 0086-574-86322282 PAGE: 3/3 DATE: Jul/20/2011