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 - - 2 2 0 0 4 4 5 5 7 7 n n d d ver.2.0 page 1 of 3 since 1981 package dimensions : 8.60(.339) 53.10(2.091) 38.10(1.500) 0.50(.020) 5.90.5(.232020) 2.54x6=15.24(.600) 5.0(.197) 37.8(1.488) 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. 2.00 inch (53.20mm) matrix height. 2. dot size 5.0 mm. 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-20457ND is a 53.2mm (2.00") matrix height57 dot matrix display. 2. this product use hi-eff red chips, which are made from gaasp 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 - - 2 2 0 0 4 4 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 - 1.9 2.5 v luminous intensity per dot iv i f =10ma - 12.0 - mcd reverse current per dot i r v r =5v - - 100 a peak wave length p i f =10ma - 640 - nm dominant wave length d i f =10ma 626 - 636 nm spectral line half-width ? i f =10ma - 40 - 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 - - 2 2 0 0 4 4 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) fig.1 relative radiant intensity vs. wavelength wavelength(nm) forward voltage fig.4 relative luminous forward current(ma) forward voltage (v) relative luminous intensity 0.0 0 (@20ma) 1.0 2.0 forward current (ma) 3.0 0 0 30 10 20 40 50 40 10 20 30 50 forward current 4 intensity vs. 123 5 fig.2 forward current vs. relative radiant intensity 560 0 0.5 1.0 590 620 ambient temperature ambient temperature derating curve vs. fig.5 forward current ambient temperature ta( c) ambient temperature ta( c) 0 0 20 forward current(ma) 10 30 40 80 60 20 40 relative luminous intensity (@20ma) 0.5 50 -40 0 1.5 1.0 3.0 2.5 2.0 0 -20 20 120 100 40 60 fig.3 relative luminous 650 680 intensity vs. 710 740 I??? http://www.brtled.com
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