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 s s - - a a 8 8 4 4 4 4 b b d d ver.1.0 page 1 of 3 since 1981 package dimensions : 27.70(1.091) 11.00(.433) 8 0.50(.020) 20.40(.800) 19.90(.783) 15.24(.600) 8.40(.331) 1.5(.059) 1.00(.039) 2.54(.100) 6.30.5(.248020) 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. 0.80 inch (20.40mm) digit height. 2. continuous uniform segments. 3. low power requirement. 4. excellent characters appearance. 5. solid state reliability. 6. categorized for luminous intensity. 7. direct drive common anode. description : 1. the BS-A844BD is a 20.40mm (0.80") high single digit seven segments 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 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 s s - - a a 8 8 4 4 4 4 b b 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 80 mw forward current per segment i f 30 ma peak forward current per segment i fp (duty 1/10, 1khz) 150 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 - 1.9 2.5 v luminous intensity per segment iv i f =10ma - 3.2 - mcd reverse current per segment 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 s s - - a a 8 8 4 4 4 4 b b 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 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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