b b r r i i g g h h t t l l e e d d e e l l e e c c t t r r o o n n i i c c s s c c o o r r p p . . b b t t - - m m 3 3 4 4 5 5 r r d d ver.1.0 page 1 of 3 since 1981 package dimensions : notes: 1. all dimensions are in millimeters(inches). 2. tolerance is 0.25mm(.01")unless otherwise specified. 3. specifications are subject to change without notice. features : 1. 0.39 inch (10.0mm) digit height. 2. continuous uniform segments. 3. low power requirement. 4. excellent characters appearance. 5. solid state reliability. 6. categorized for luminous intensity. 7. multiplex drive common anode. description : 1. the BT-M345RD is a 10.0mm(0.39") high three digit seven segments display. 2. this product use bright red chips, which are made from gap on gap substrate. 3. this product have a black face and white segments. 4. this product doesn't contain restriction substance, comply rohs standard. internal circuit diagram : I??? http://www.brtled.com
b b r r i i g g h h t t l l e e d d e e l l e e c c t t r r o o n n i i c c s s c c o o r r p p . . b b t t - - m m 3 3 4 4 5 5 r r d d ver.1.0 page 2 of 3 since 1981 absolute maximum ratings(ta=25 ) parameter symbol rating unit power dissipation per segment pd 40 mw forward current per segment i f 15 ma peak forward current per segment i fp (duty 1/10, 1khz) 50 ma reverse voltage per segment v r 5 v operating temperature topr -40 ~80 - storage temperature tstg -40 ~85 - soldering temperature (1/16" from body) ts o l 260 for 5 seconds - electrical and optical characteristics(ta=25 ) parameter symbol condition min. typ. max. unit forward voltage per segment vf i f =10ma - 2.1 2.5 v luminous intensity per segment iv i f =10ma - 1.2 - mcd reverse current per segment i r v r =5v - - 100 a peak wave length p i f =10ma - 700 - nm dominant wave length d i f =10ma 631 - 641 nm spectral line half-width ? i f =10ma - 90 - nm I??? http://www.brtled.com
b b r r i i g g h h t t l l e e d d e e l l e e c c t t r r o o n n i i c c s s c c o o r r p p . . b b t t - - m m 3 3 4 4 5 5 r r d d ver.1.0 page 3 of 3 since 1981 typical electro-optical characteristics curves (25 ambient temperature unless otherwise noted) fig.1 relative radiant intensity vs. wavelength wavelength(nm) forward voltage f o r w a r d c u r r e n t ( m a ) fig.4 relative luminous forward current(ma) forward voltage (v) r e l a t i v e l u m i n o u s i n t e n s i t y 0.0 ( @ 2 0 m a ) 1.0 2.0 3.0 0 30 10 20 40 50 40 10 20 30 50 forward current 4 intensity vs. 123 5 fig.2 forward current vs. r e l a t i v e r a d i a n t i n t e n s i t y 550 0 0.5 1.0 600 650 ambient temperature ambient temperature derating curve vs. fig.5 forward current ambient temperature ta( c) ambient temperature ta( c) 0 10 f o r w a r d c u r r e n t ( m a ) 5 15 20 20 40 60 80 0.5 25 -40 0 1.5 1.0 3.0 2.5 2.0 0 -20 20 120 100 40 60 fig.3 relative luminous 700 750 intensity vs. 800 850 ( @ 2 0 m a ) r e l a t i v e l u m i n o u s i n t e n s i t y 0 0 0 I??? http://www.brtled.com
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