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| Datasheet File OCR Text: |
| BLC149 http://www.belling.com.cn - 1 - 8/18/2006 total 1 pages ? ? ? ? ?? ?? ?? ?? ?? ?? ?? ?? ? ? ? ? parameter symbol ? ? ? ? rating ? ? ? ? ? ? ? ? unit ? assignment temperature range t amb 55 100 ? storage temperature range t atg 55 125 ? maximum reverse voltage v rm 18 v ? breakdown voltage v (br) >20 v junction temperature t j 125 ? forward voltage(i f =20ma) v f 0.5 v ? ? ? ? (at t=25 ) parameter symbol test conditions ? ? ? ? max. ? ? ? ? typ. ? ? ? ? min. unit 1v diode capacitance c 1 v r1 =1v 560 473 387 pf 8v diode capacitance c 2 v r2 =8v 32.4 24.5 16.7 pf ? capacitance ratio c 1 /c 2 v r1 =3v, v r2 =8v 17.6 10.2 6.3 reverse current i r v r =8v 1 50 na ? forward voltage v f i f =20ma 1 0.5 v ? figure of merit q v r =1v, f=1mhz 50
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