ics for cassette, cassette deck n overview the AN7351K and the an7351sc are the single chip ics designed for pre-amp. for stereo cassette (double deck especially) incorporating 2-ch rec./playback/line amp. and muting/switching circuits. n features ? available for double deck 1. available for playback amp. tape speed switching 2. available for rec. amp. mute function 3. available for playback amp. input and output switch- ing function ? rec. amp. current and voltage both drive output is pos- sible. ? line amp. + mute circuit built-in ? playback equalizer switching built-in ? available for microcomputer direct drive of switching control pin AN7351K, an7351sc dual pre-amplifier ics for hi-fi cassette deck 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 36.8 0.3 0.9 0.25 3 ~ 15? unit : mm 13.7 0.3 0.5 0.1 1.778 4.76 0.25 3.3 0.25 15.3 0.25 0.3 + 0.1 ?0.05 0.96 0.25 AN7351K 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 42-lead sdip package (sdip042-p-0600a) 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 ? cc +v cc nc gnd 1 2 sw t 1 t 2 sw 120/70 sw line p?b mute cue rev. mute rec. mute rec. rec. ch.2 ch.1 ch.2 ch.2 ch.1 ch.1 p?b n block diagram 0.45 0.35 0.1 1.0 0.1 0.1 0.3 2.0 0.2 0.9 0.15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 9.5 0.3 11.5 0.3 unit : mm 21.25 0.3 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 an7351sc 42-lead sop package (ssop042-p-0450)
ics f or cassette , cassette dec k AN7351K, an7351sc n a b s o l u t e m a x i m u m r a t i n g s ( t a = 2 5 ? c ) v c c i c c p d t o p r t s t g s u p p l y v o l t a g e s u p p l y c u r r e n t p o w e r d i s s i p a t i o n o p e r a t i n g a m b i e n t t e m p e r a t u r e s t o r a g e t e m p e r a t u r e v m a m w ? c ? c p a r a m e t e r s y m b o l r a t i n g u n i t 7 . 2 3 9 1 0 1 4 * 7 8 7 * 2 0 ~ + 7 5 5 0 ~ + 1 5 0 5 5 ~ + 1 2 5 a n 7 3 5 1 k a n 7 3 5 1 s c a n 7 3 5 1 k a n 7 3 5 1 s c * a n 7 3 5 1 k : r t h ( j a ) = 1 2 3 . 3 ? c / w , a n 7 3 5 1 s c : r t h ( j a ) = 1 2 7 ? c / w p a r a m e t e r s y m b o l r a n g e o p e r a t i n g s u p p l y v o l t a g e r a n g e v c c 4 . 5 v ~ 7 v n r e c o m m e n d e d o p e r a t i n g r a n g e ( t a = 2 5 ? c ) v i = 3 . 6 m v s p e e d 1 f e e d b a c k t i m e c o n s t a n t 1 2 0 s v i = 3 . 6 m v s p e e d 1 f e e d b a c k t i m e c o n s t a n t 7 0 s v i = 3 . 6 m v s p e e d 2 f e e d b a c k t i m e c o n s t a n t 1 2 0 s v i = 3 . 6 m v s p e e d 2 f e e d b a c k t i m e c o n s t a n t 7 0 s r g = 2 . 2 k , d i n / a u d i o , s p e e d 1 f e e d b a c k t i m e c o n s t a n t 1 2 0 s r g = 2 . 2 k , d i n / a u d i o , s p e e d 1 f e e d b a c k t i m e c o n s t a n t 1 2 0 s r g = 2 . 2 k , d i n / a u d i o , s p e e d 1 f e e d b a c k t i m e c o n s t a n t 1 2 0 s r g = 2 . 2 k , d i n / a u d i o , s p e e d 1 f e e d b a c k t i m e c o n s t a n t 1 2 0 s v i = 3 . 6 m v v i = 3 . 6 m v t h d = 3 % t h d = 3 % r g = 2 2 0 r g = 2 2 0 v i = 3 . 6 m v v i = 3 . 6 m v v i = 2 0 0 m v v i = 3 0 m v t h d = 3 % , r l = 1 0 t h d = 3 % , r l = 1 v i = 2 0 0 m v r g = 2 . 2 k , d i n / a u d i o r g = 2 . 2 k r g = 5 k 0 . 9 0 . 9 6 0 6 0 3 3 7 0 7 0 6 0 6 0 2 . 2 1 7 5 9 2 5 p a r a m e t e r s y m b o l c o n d i t i o n m i n . t y p . m a x . u n i t n e l e c t r i c a l c h a r a c t e r i s t i c s ( v c c = 6 v , f = 1 k h z , t a = 2 5 ? c ) 0 . 1 0 . 1 0 . 1 0 . 1 1 . 5 1 . 5 9 9 7 0 7 0 0 . 1 0 . 2 1 9 2 5 0 . 0 4 0 . 0 4 0 . 0 4 0 . 0 4 0 . 7 0 . 7 3 . 4 3 . 4 0 . 0 3 0 . 0 3 3 . 2 1 . 5 0 . 0 3 t o t a l h a r m o n i c d i s t o r t i o n ( 1 ) t a p e 1 t o t a l h a r m o n i c d i s t o r t i o n ( 2 ) t a p e 1 t o t a l h a r m o n i c d i s t o r t i o n ( 3 ) t a p e 2 t o t a l h a r m o n i c d i s t o r t i o n ( 4 ) t a p e 2 o u t p u t n o i s e v o l t a g e t a p e 1 o u t p u t n o i s e v o l t a g e t a p e 2 p u l s e n o i s e v o l t a g e t a p e 1 p u l s e n o i s e v o l t a g e t a p e 2 m u t i n g a t t e n u a t i o n t a p e 1 m u t i n g a t t e n u a t i o n t a p e 2 m a x . o u t p u t v o l t a g e t a p e 1 m a x . o u t p u t v o l t a g e t a p e 2 o u t p u t o f f s e t v o l t a g e t a p e 1 o u t p u t o f f s e t v o l t a g e t a p e 2 c r o s s t a l k t a p e 1 ? t a p e 2 c r o s s t a l k t a p e 2 ? t a p e 1 t o t a l h a r m o n i c d i s t o r t i o n v o l t o t a l h a r m o n i c d i s t o r t i o n c u r m a x . o u t p u t v o l t a g e v o l m a x . o u t p u t v o l t a g e c u r m u t i n g a t t e n u a t i o n v o l o u t p u t n o i s e v o l t a g e c u r p u l s e n o i s e v o l t a g e c u r o u t p u t o f f s e t c u r r e n t c u r t h d ( p 1 ) t h d ( p 2 ) t h d ( p 3 ) t h d ( p 4 ) v n ( t 1 ) v n ( t 2 ) v p n ( t 1 ) v p n ( t 2 ) r m ( t 1 ) r m ( t 2 ) v o ( t 1 ) v o ( t 2 ) v d c ( t 1 ) v d c ( t 2 ) c t ( t 1 ) c t ( t 2 ) t h d ( r v ) t h d ( r c ) v o ( r v ) v o ( r c ) r m ( r v ) v n ( r c ) v p n ( r c ) i d c ( r c ) % % % % m v m v m v p o m v p o d b d b v v m v m v d b d b % % v v d b m v m v p o a < p l a y b a c k a m p . > r l = 2 0 k < r e c . a m p >
ics f or cassette , cassette dec k AN7351K, an7351sc v i = 1 v t h d = 3 % v i = 1 v , r l = 5 . 1 k v i = 1 v , r l = 5 . 1 k r g = 5 k , d i n / a u d i o r g = 5 k r g = 1 0 k v i = 1 v p i n 1 1 v o l t a g e a t 1 2 0 s , v c c = 4 . 5 v p i n 1 0 v o l t a g e a t 1 2 0 s , v c c = 4 . 5 v p i n 1 2 v o l t a g e a t t 2 m o d e , v c c = 4 . 5 v p i n 1 3 v o l t a g e a t m u t e o f f , v c c = 4 . 5 v p i n 1 5 v o l t a g e a t m u t e o f f , v c c = 4 . 5 v p i n 2 7 v o l t a g e a t m u t e o f f , v c c = 4 . 5 v p i n 3 3 v o l t a g e a t d o u b l e s p e e d m o d e , v c c = 4 . 5 v 3 8 0 3 4 9 2 0 0 . 8 0 0 0 0 0 0 0 8 p a r a m e t e r s y m b o l c o n d i t i o n m i n . t y p . m a x . u n i t 0 . 0 7 4 0 0 . 0 3 9 2 0 0 . 8 1 . 5 1 . 5 1 . 4 5 1 . 6 1 . 6 1 . 6 1 . 2 3 4 0 . 0 2 3 . 6 3 7 0 . 0 1 0 1 8 t o t a l h a r m o n i c d i s t o r t i o n m a x . o u t p u t v o l t a g e m u t i n g a t t e n u a t i o n c u e / r e v d i s t o r t i o n o u t p u t n o i s e v o l t a g e p u l s e n o i s e v o l t a g e o u t p u t o f f s e t v o l t a g e v o l t a g e g a i n t i m e c o n s t a n t s w i t c h i n g p i n v o l t a g e t i m e c o n s t a n t s w i t c h i n g p i n v o l t a g e t a p e s w i t c h i n g p i n v o l t a g e l / p m u t e p i n v o l t a g e c / r m u t e p i n v o l t a g e r e c o r d i n g m u t e p i n v o l t a g e s p e e d s w i t c h i n g p i n v o l t a g e c u r r e n t c o n s u m p t i o n t h d ( l ) v o ( l ) r m ( l ) r m ( c / r ) v n ( l ) v p n ( l ) v d c ( l ) g ( l ) v t ( t 1 ) v t ( t 2 ) v t 1 / t 2 v m ( l / p ) v m ( c / r ) v m ( r ) v s ( h / l ) i t o t % v d b d b m v m v p o m v d b v v v v v v v m a < l i n e a m p . > < l o g i c > n e l e c t r i c a l c h a r a c t e r i s t i c s ( c o n t . ) ( v c c = 6 v , f = 1 k h z , t a = 2 5 ? c ) 4 2 4 1 4 0 3 9 3 8 3 7 3 6 3 5 3 4 3 3 3 2 3 1 3 0 2 9 2 8 2 7 2 6 2 5 2 4 2 3 2 2 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 r / p c o n t . , 1 r / p c o n t . , 1 1 2 s w t 1 t 2 s w 1 2 0 / 7 0 s w l i n e p b m u t e c u e r e v m u t e r e c . m u t e r e c . r e c . c h . 2 c h . 1 c h . 2 c h . 1 c h . 2 c h . 1 p b b i a s t a p e 2 l r / r h e a d r t a p e 1 l r / r h e a d r 6 8 0 p f 6 8 0 p f 8 2 5 6 0 k 1 0 k 2 7 k 2 2 k 0 . 0 0 5 6 f 1 0 0 f / 6 v 4 . 7 f 4 . 7 f 2 0 k v r 2 0 k v r 0 . 4 7 f n c . 1 0 k 1 0 k 4 . 7 f 1 0 k 4 . 7 f 4 . 7 f 4 . 7 f t o a m p . l i n e i n d o l b y 1 0 k v r 1 0 0 k 1 0 f / 1 6 v 1 0 k v r 4 . 7 f 2 . 7 k 2 . 2 k 1 8 k r e c . e q 1 % 2 c o n t . 1 0 0 k 1 8 k 2 . 2 k 2 . 7 k 4 . 7 f t o h e a d 2 0 k v r 2 0 k v r g 2 7 k 5 6 0 k 1 0 k 2 2 k 0 . 0 0 5 6 f 1 0 0 f / 6 v 6 8 0 p f 6 8 0 p f 8 2 t o h e a d f g c o m f n application circuit
ics f or cassette , cassette dec k AN7351K, an7351sc n p i n d e s c r i p t i o n s e q u i v a l e n t c i r c u i t p i n n o . p i n n a m e d e s c r i p t i o n 2 p l a y b a c k a m p . t 1 i n ( c h . 1 ) p l a y b a c k a m p . t a p e 1 i n p u t t y p . w a v e f o r m m a i n c i r c u i t v c c 1 n e g a t i v e s u p p l y p i n d c 6 v 4 1 p l a y b a c k a m p . t 1 i n ( c h . 2 ) 3 p l a y b a c k a m p . t 2 i n ( c h . 1 ) 4 0 p l a y b a c k a m p . t 2 i n ( c h . 2 ) p l a y b a c k a m p . t a p e 2 i n p u t p l a y b a c k a m p . n e g a t i v e f e e d b a c k i n p u t d c 0 v 4 p l a y b a c k a m p . n f i n ( c h . 1 ) 3 9 p l a y b a c k a m p . n f i n ( c h . 2 ) p l a y b a c k a m p . d o u b l e - s p e e d e q u a l i z e r s w i t c h i n g 5 1 2 0 s / 7 0 s ( 2 ) n f s w i t c h ( c h . 1 ) 3 8 1 2 0 s / 7 0 s ( 2 ) n f s w i t c h ( c h . 2 ) 6 1 2 0 s / 7 0 s ( 1 ) n f s w i t c h ( c h . 1 ) 3 7 1 2 0 s / 7 0 s ( 1 ) n f s w i t c h ( c h . 2 ) p l a y b a c k a m p . n o r m a l s p e e d e q u a l i z e r s w i t c h i n g p l a y b a c k a m p . n e g a t i v e f e e d b a c k o u t p u t 7 p l a y b a c k a m p . n f o u t ( c h . 1 ) 3 6 p l a y b a c k a m p . n f o u t ( c h . 2 ) 8 p l a y b a c k a m p . t 1 o u t ( c h . 1 ) p l a y b a c k a m p . t a p e 1 o u t p u t 3 5 p l a y b a c k a m p . t 1 o u t ( c h . 2 ) 9 p l a y b a c k a m p . t 2 o u t ( c h . 1 ) 3 4 p l a y b a c k a m p . t 2 o u t ( c h . 2 ) p l a y b a c k a m p . t a p e 2 o u t p u t 2 3 4 0 4 1 1 0 0 k 1 0 0 4 3 9 1 0 0 o u t p u t 1 8 k 5 3 8 o u t p u t 6 3 7 a m p . 4 7 7 3 6 4 7 4 7 k 4 7 4 7 4 7 k 9 3 4 3 5 8 1 0 0 + v c c v c c d c 0 v d c 0 v a c 1 v a c 1 v a c 1 v a c 1 v d c 0 v d c 0 v d c 0 v a c 3 . 6 m v
ics f or cassette , cassette dec k AN7351K, an7351sc n p i n d e s c r i p t i o n s ( c o n t . ) e q u i v a l e n t c i r c u i t p i n n o . p i n n a m e d e s c r i p t i o n 1 0 t 2 ( 1 2 0 s / 7 0 s ) l o g i c t a p e 2 e q u a l i z e r s w i t c h i n g 7 0 s o p e n 1 2 0 s l o w ( l e s s t h a n 1 . 5 v ) t y p . w a v e f o r m 1 1 t 1 ( 1 2 0 s / 7 0 s ) l o g i c t a p e 1 e q u a l i z e r s w i t c h i n g 7 0 s o p e n 1 2 0 s l o w ( l e s s t h a n 1 . 5 v ) t a p e 1 a n d t a p e 2 s w i t c h i n g t 1 o p e n t 2 l o w ( l e s s t h a n 1 . 5 v ) t 1 / t 2 l o g i c 1 2 l i n e / p b a m p . m u t e l o g i c 1 3 l i n e m u t e t i m i n g 1 4 c u e / r e v m u t e l o g i c 1 5 m u t e o n o p e n m u t e o f f l o w ( l e s s t h a n 1 . 6 v ) l i n e a m p . , p b a m p . m u t e s w i t c h i n g m u t e o n o p e n m u t e o f f l o w ( l e s s t h a n 1 . 6 v ) l i n e m u t e s o f t s w i t c h i n g 1 6 n c 1 7 l i n e m u t e a m p . o u t ( c h . 2 ) 2 1 l i n e m u t e a m p . o u t ( c h . 1 ) l i n e a m p . o u t p u t 1 0 1 1 v c c 1 2 v c c 6 0 k 1 0 0 k v c c 2 7 k 1 3 v c c 1 4 1 1 k 4 7 k 1 k 1 5 v c c 1 7 2 1 v c c 4 7 4 7 1 0 0 4 7 k d c 0 v a c 1 v
ics f or cassette , cassette dec k AN7351K, an7351sc n p i n d e s c r i p t i o n s ( c o n t . ) e q u i v a l e n t c i r c u i t p i n n o . p i n n a m e d e s c r i p t i o n t y p . w a v e f o r m l i n e a m p . i n p u t 1 8 l i n e m u t e a m p . i n ( c h . 2 ) 2 0 l i n e m u t e a m p . i n ( c h . 1 ) 1 9 s u p p l y p i n d c 6 v m a i n c i r c u i t + v c c r e c . a m p . c u r r e n t o u t ( c h . 1 ) 2 2 r e c . a m p . c u r r e n t o u t p u t 2 0 0 m v o u t p u t a t i n p u t 3 0 m v , l o a d 1 0 0 k r e c . a m p . c u r r e n t o u t ( c h . 2 ) 3 2 r e c . a m p . v o l t a g e o u t p u t 1 . 4 5 v o u t p u t a t i n p u t 2 0 0 m v 2 3 r e c . a m p . v o l t a g e o u t ( c h . 1 ) 3 1 r e c . a m p . v o l t a g e o u t ( c h . 2 ) 2 4 r e c . a m p . n f o u t ( c h . 1 ) 3 0 r e c . a m p . n f o u t ( c h . 2 ) r e c . a m p . f e e d b a c k o u t p u t 2 5 r e c . a m p . n f i n ( c h . 1 ) 2 9 r e c . a m p . n f i n ( c h . 2 ) r e c . a m p . n e g a t i v e f e e d b a c k i n p u t d c 0 v 2 6 r e c . a m p . i n ( c h . 1 ) 2 8 r e c . a m p . i n ( c h . 2 ) r e c . a m p . i n p u t 1 8 2 0 2 2 3 2 2 3 3 1 4 7 4 7 2 4 3 0 4 7 4 7 4 7 4 7 1 0 0 2 5 2 9 1 0 0 1 0 0 2 6 2 8 a c 1 v d c 0 v d c 0 v d c 0 v d c 0 v d c 0 v
ics f or cassette , cassette dec k AN7351K, an7351sc n p i n d e s c r i p t i o n s ( c o n t . ) e q u i v a l e n t c i r c u i t p i n n o . p i n n a m e d e s c r i p t i o n t y p . w a v e f o r m r e c . a m p . m u t e s w i t c h i n g m u t e o n o p e n m u t e o f f l o w ( l e s s t h a n 1 . 6 v ) 2 7 r e c . m u t e l o g i c s p e e d h / l s w i t c h i n g 1 o p e n 2 l o w ( l e s s t h a n 1 . 2 v ) 3 3 s p e e d h / l l o g i c 4 2 g n d m a i n c i r c u i t g n d d c 0 v 2 7 v c c 4 7 4 7 4 7 3 3 v c c 4 7 k 1 5 k 5 k 2 0
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