s m a l l s i g n a l s w i t c h i n g d i o d e s reverse v oltage: 250 v olts forward current: 200 ma rohs device page 1 rev :c features -fast switching speed. -for general purpose switching applications. -surface mount package ideally suited for automatic insertion. mechanical data -case: sot -23, molded plastic. -t erminals: solderable per mil-std-750, method 2026. -approx. weight: 0.008 grams circuit diagram cdst -21/a/c/s-g maximum ratings and electrical characteristics qw -b0015 comchip t echnology co., l td. repetitive peak reverse voltage dc blocking voltage power dissipation junction temperature storage temperature units symbol parameter v rrm v r p d t j t stg 1 2 3 v alue 250 225 150 -55 to +150 v mw c cdst -21-g cdst -21a-g cdst -21c-g cdst -21s-g 1 2 3 1 2 3 1 2 3 c (at t a=25c unless otherwise noted) d i m e n s i o n s i n i n c h e s a n d ( m i l l i m e t e r ) s o t - 2 3 3 1 2 0.1 18(3.00) 0.1 10(2.80) 0.055(1.40) 0.047(1.20) 0.079(2.00) 0.071(1.80) 0.041(1.05) 0.035(0.90) 0.020(0.50) 0.012(0.30) 0.006(0.15) 0.003(0.08) 0.100(2.55) 0.089(2.25) 0.004(0.10) max 0.012(0.30) 0.020(0.50) company reserves the right to improve product design , functions and reliability without notice. -high conductance. repetitive peak forward surge current non-repetitive peak forward surge current thermal resistance junction to ambient i rm f i fsm r ja @ t = 1.0 s 625 2.5 55 ma a c/w @ t = 1.0s 0.5 a verage rectified output current i o 200 ma v rwm w orking peak reverse voltage
ra ting and characteristic cur ves (cdst -21/a/c/s-g) page 2 s m a l l s i g n a l s w i t c h i n g d i o d e s comchip t echnology co., l td. company reserves the right to improve product design , functions and reliability without notice. symbol parameter conditions min. max. unit electrical characteristics (at t a=25c unless otherwise noted) forward voltage mv 1000 i f = 100ma reverse voltage leakage current 0.1 v r = 200v reverse breakdown voltage i r = 100 a diode capacitance vr=0v , f=1mhz a reverse recovery time i = 0ma, i rr =0.1xi r , r l =100 f i r =3 50 ns i f = 200ma v (br) i r v f c d t rr v 250 1250 5 pf c a p a c i t a n c e b e t w e e n t e r m i n a l s , ( p f ) reverse voltage, (v) fig.3 - capacitance between f o r w a r d c u r r e n t , ( m a ) 0 . 4 0 1 0 0 . 0 1 2 . 0 forward voltage, (v) fig.1 - forward characteristics r e v e r s e c u r r e n t , ( a ) reverse voltage, (v) 1 0 1 1 0 0 0 0 4 0 fig.2 - reverse characteristics 0 8 12 16 20 0.6 1.4 0 5 0 1 0 0 1 5 0 2 0 0 2 5 0 0 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 ambient temperature, (c) p o w e r d a i s s i p a t i o n , ( m w ) fig.4 - power derating curve 1.2 1.6 0.8 1 1 0 0 0 0 . 8 1 . 2 1 . 6 1 0 0 8 0 1 6 0 2 0 0 t a = 1 0 0 c t a = 2 5 c 1 0 0 0 . 1 t a = 1 0 0 c t a = 2 5 c 1 2 0 1.0 4 f=1mhz t a =25c 3 0 0 rev :c qw -b0015
page 3 s m a l l s i g n a l s w i t c h i n g d i o d e s comchip t echnology co., l td. company reserves the right to improve product design , functions and reliability without notice. reel t aping specification b c d d d 2 d 1 s o t - 2 3 s y m b o l a ( m m ) ( i n c h ) 2 . 1 4 2 0 . 0 3 9 4 . 0 0 0 . 1 0 1 . 5 0 0 . 1 0 5 4 . 4 0 1 . 0 0 1 3 . 0 0 1 . 0 0 4 . 0 0 0 . 1 0 2 . 0 0 0 . 1 0 1 7 8 2 . 0 0 0 . 0 5 9 0 . 0 0 4 7 . 0 0 8 0 . 0 7 9 0 . 5 1 2 0 . 0 3 9 s y m b o l ( m m ) ( i n c h ) 0 . 0 . 0 0 4 1 5 7 0 . 1 5 7 0 . 0 0 4 0 . 0 7 9 0 . 0 0 4 e f p p 0 p 1 w w 1 1 . 7 5 0 . 1 0 0 . 0 6 9 0 . 0 0 4 3 . 5 0 0 . 1 0 0 . 1 3 8 0 . 0 0 4 s o t - 2 3 3 . 1 5 0 . 1 0 0 . 1 2 4 0 . 0 0 4 2 . 7 7 0 . 1 0 0 . 1 0 9 0 . 0 0 4 1 . 2 2 0 . 1 0 0 . 0 4 8 0 . 0 0 4 1 2 . 3 0 1 . 0 0 0 . 4 8 4 0 . 0 3 9 8 . 0 0 0 . 3 0 / + C 0 . 1 0 0 . 3 1 5 0 . 0 1 2 / + C 0 . 0 0 4 d f e b p 1 p 0 o 1 2 0 d 1 d 2 w 1 p d a w t c rev :c qw -b0015
page 4 s m a l l s i g n a l s w i t c h i n g d i o d e s comchip t echnology co., l td. company reserves the right to improve product design , functions and reliability without notice. part number cdst -21-g marking code js marking code xxx 3 1 2 xx/xxx = product type marking code suggested p ad layout size (inch) 0.031 (mm) 0.80 1.90 2.02 0.075 0.080 sot -23 2.82 0.1 1 1 a b c d a c b d standard packaging c a s e t y p e s o t - 2 3 3 , 0 0 0 r e e l ( p c s ) reel size (inch) 7 r e e l p a c k cdst -21a-g js 2 cdst -21c-g js3 cdst -21s-g js4 rev :c qw -b0015
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