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 m m - - 1 1 1 1 2 2 5 5 7 7 n n d d ver.2.0 page 1 of 3 since 1981 package dimensions : 8.00(.315) 3.0(.118)min 2.54x6=15.24(.600) 22.75(.896) + 4.57x4=18.28(.720) 3 1 . 8 0 ( 1 . 2 5 2 ) 4 . 5 7 x 6 = 2 7 . 4 2 ( 1 . 0 8 0 ) 2 2 . 8 6 ( . 9 0 0 ) 0.50(.020) 3.0x35 (.118x35) pin 1. 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. 1.252 inch (31.80mm) matrix height. 2. dot size 3.0mm. 3. low power requirement. 4. excellent characters appearance. 5. solid state reliability. 6. multiplex drive , column cathode com. and row anode com. 7. single color available. 8. categorized for luminous intensity. 9. stackable vertically and horizontally. description : 1. the BM-11257ND is a 31.8mm(1.252") matrix height 57 dot matrix display. 2. this product use green chips, which are made from gap on gap substrate. 3. this product have a black face and white dots. 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 m m - - 1 1 1 1 2 2 5 5 7 7 n n d d ver.2.0 page 2 of 3 since 1981 absolute maximum ratings(ta=25 ) parameter symbol rating unit power dissipation per dot pd 80 mw forward current per dot i f 30 ma peak forward current per dot i fp (duty 1/10, 1khz) 150 ma reverse voltage per dot 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 dot v f i f =10ma - 2.1 2.5 v luminous intensity per dot iv i f =10ma - 10.0 - mcd reverse current per dot i r v r =5v - - 100 a peak wave length p i f =10ma - 568 - nm dominant wave length d i f =10ma 569 - 574 nm spectral line half-width ? i f =10ma - 30 - 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 m m - - 1 1 1 1 2 2 5 5 7 7 n n d d ver.2.0 page 3 of 3 since 1981 typical electro-optical characteristics curves (25 ambient temperature unless otherwise noted) forward voltage (v) f o r w a r d c u r r e n t ( m a ) 12345 0 10 20 30 40 50 fig.2 forward current vs. forward voltage wavelength(nm) r e l a t i v e r a d i a n t i n t e n s i t y fig.1 relative radiant intensity vs. wavelength ambient temperature ta( c) forward current(ma) 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 -40 -20 0 20 40 60 0 0.5 1.0 1.5 2.0 2.5 3.0 fig.3 relative luminous intensity vs. ambient temperature fig.4 relative luminous intensity vs. forward current 10 20 30 40 50 1.0 2.0 3.0 0 460 490 0.5 520 550 1.0 640 580 610 ambient temperature ta( c) fig.5 forward current f o r w a r d c u r r e n t ( m a ) 0 10 20 40 20 60 40 50 derating curve vs. 80 100 30 120 ambient temperature ( @ 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 ( @ 2 0 m a ) 0.0 0 I??? http://www.brtled.com
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