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  1/3 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.04 - rev.c high efficiency, three-digit numeric displays lb-303ak series the lb-303ak series were designed to meet the need for multi- digit numeric displays. these led numeric displays use gaasp on gap for the emitting material (with the exception of green) and are housed in an epoxy resin package. they are three-digit displays with a character height of 8.0 mm. ? features ? dimensions (unit : mm) 1) height of character : 8.0 mm 2) high efficiency in a compact package. 3) common anode and common cathode configurations are ava ilable for red and green. 4) the package surface is painted black and the segments are colored the display color. ? selection guide red green lb-303va lb-303vk lb-303ma lb-303mk anode cathode common emitting color ? pin assignments digit 1 d.p1 a g d fb ec digit 2 d.p2 a g d fb ec digit 3 d.p3 a g d fb ec pin no. ++++++ + ++++ 123456 11 10 9 8 7 segment "c" digit 1 common segment "d" digit 2 common digit 3 common segment d.p segment "b" segment "f" segment "a" segment "e" segment "g" 1 2 3 4 5 6 7 8 9 10 11 function pin no. 1.0 4.0 0.5 (9.2) 3- 0.9 (12.7) (2.54) 0.5 5.0 0.5 5.0 1.0 8.0 13.0 22.0 7.0 7.0 10 tolerances are 0.3 unless otherwise noted:
2/3 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.04 - rev.c data sheet lb-303ak series ? internal circuit schematic (example of common anode) a 9 b 7 c 1 d 3 e 10 f 8 g 11 d.p 6 5 dig.3 4 dig.2 2 dig.1 ? absolute maximum ratings (ta = 25 ? c) parameter symbol red unit lb-303va / vk lb-303ma / mk 960 40 15 60 ? 3 mw mw ma ma v c c p d p d / seg i f i fp v r topr tstg power dissipation power dissipation forward current peak forward current reverse voltage operating temperature storage temperature green 1440 60 20 60 ? 3 ? 25 to + 75 ? 30 to + 85 ? pulse width 1ms duty 1 / 5 ? electrical and opti cal characteristics (ta = 25 ? c) parameter symbol red green unit conditions min. typ. max. v a nm nm 2.8 2.0 650 40 100 ? ? ? ? ?? ? min. typ. max. 2.8 2.1 563 40 100 ? ? ? ? ? ?? i f = 10ma v r = 3v i f = 10ma i f = 10ma v f i r p ? forward voltage reverse current peak wavelength spectral line half width not designed for radiation resistance. ? luminous intensity unit min. typ. max. color p type red green 650 563 lb-303va lb-303vk lb-303ma lb-303mk 1.4 4.0 ? mcd 2.2 6.3 ? mcd note : measured at i f = 10ma
3/3 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.04 - rev.c data sheet lb-303ak series ? electrical and optical characteristic curves fig.1 forward current - forward voltage lb-303ma lb-303mk lb-303va lb-303vk 0.1 1 10 100 1 1.5 2 2.5 3 ta=25 c forward voltage:v f (v) forward current:i f (ma) fig.2 relative luminous intensity - forward current 0.01 0.10 1.00 10.00 1 10 100 relative luminous intensity forward current:i f (ma) ta=25 c fig.3 relative luminous intensity - case temperature 0.4 0.6 1.2 1.4 1.6 case temparature ( c) i f =10ma -25 -15 -5 5 15 25 35 45 55 65 75 relative luminous intensity 0.8 1 fig.4 ratio of maximum tolerable peak current - pulse duration ( ) lb-303ma lb-303mk 1 10 100 1000 10000 100000 pulse duration : tw(s) 30hz 100hz 300hz 1khz 3khz 10khz 30khz 100khz 300khz ratio of maximum tolerable peak current to maximum forward current ( ) i f peak max. i f max. 1 10 fig.5 ratio of maximum tolerable peak current - pulse duration ( ? ) 1 10 1 10 100 1000 10000 pulse duration : tw(s) 100hz 200hz 500hz 1khz 2khz 5khz 10khz 20khz 50khz ratio of maximum tolerable peak current to maximum forward current ( ) i f peak max. i f max. lb-303va lb-303vk fig.6 derating 0% 20% 40% 60% 80% 100% 120% forward current (%) ambient temperature( c) -25 -15 -5 5 15 25 35 45 55 65 75 85
r 1 120 a ww w .rohm.com ? 20 1 1 rohm co., ltd. all rights reserved. notice rohm customer support system http://ww w . r ohm.com/contact/ thank you for your accessing to rohm p r oduct informations. mo r e detail p r oduct informations and catalogs a r e available, please contact us. notes


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