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ASM2I EP4857 TFS150Y SAC10 74HC5 MAX14591 HER30 LA6551
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  s u p e r v i s o r y c i r c u i t s w i t h w a t c h d o g a n d m a n u a l r e s e t i n 5 - l e a d s o t - 2 3 d a t a s h e e t a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 r e v . 0 d o c u m e n t f e e d b a c k i n f o r m a t i o n f u r n i s h e d b y a n a l o g d e v i c e s i s b e l i e v e d t o b e a c c u r a t e a n d r e l i a b l e . h o w e v e r , n o r e s p o n s i b i l i t y i s a s s u m e d b y a n a l o g d e v i c e s f o r i t s u s e , n o r f o r a n y i n f r i n g e m e n t s o f p a t e n t s o r o t h e r r i g h t s o f t h i r d p a r t i e s t h a t m a y r e s u l t f r o m i t s u s e . s p e c i f i c a t i o n s s u b j e c t t o c h a n g e w i t h o u t n o t i c e . n o l i c e n s e i s g r a n t e d b y i m p l i c a t i o n o r o t h e r w i s e u n d e r a n y p a t e n t o r p a t e n t r i g h t s o f a n a l o g d e v i c e s . t r a d e m a r k s a n d r e g i s t e r e d t r a d e m a r k s a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s . o n e t e c h n o l o g y w a y , p . o . b o x 9 1 0 6 , n o r w o o d , m a 0 2 0 6 2 - 9 1 0 6 , u . s . a . t e l : 7 8 1 . 3 2 9 . 4 7 0 0 ? 2 0 1 3 a n a l o g d e v i c e s , i n c . a l l r i g h t s r e s e r v e d . t e c h n i c a l s u p p o r t w w w . a n a l o g . c o m f e a t u r e s 2 6 r e s e t t h r e s h o l d o p t i o n s 2 . 5 v t o 5 v i n 1 0 0 m v i n c r e m e n t s 4 r e s e t t i m e o u t o p t i o n s 1 m s , 2 0 m s , 1 4 0 m s , a n d 1 1 2 0 m s ( m i n i m u m ) 4 w a t c h d o g t i m e o u t o p t i o n s 6 . 3 m s , 1 0 2 m s , 1 . 6 s e c , a n d 2 5 . 6 s e c ( t y p i c a l ) m a n u a l r e s e t i n p u t m u l t i p l e r e s e t o u t p u t o p t i o n s l o w p o w e r c o n s u m p t i o n s p e c i f i e d o v e r w i d e t e m p e r a t u r e r a n g e (  4 0 c t o + 1 2 5 c ) q u a l i f i e d f o r a u t o m o t i v e a p p l i c a t i o n s 5 - l e a d s o t - 2 3 p a c k a g e a p p l i c a t i o n s a u t o m o t i v e i n f o t a i n m e n t m i c r o p r o c e s s o r s y s t e m s c o m p u t e r s c o n t r o l l e r s i n t e l l i g e n t i n s t r u m e n t s p o r t a b l e e q u i p m e n t f u n c t i o n a l b l o c k d i a g r a m s f i g u r e 1 . a d m 8 3 1 6 f i g u r e 2 . a d m 8 3 2 0 g e n e r a l d e s c r i p t i o n t h e a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 a r e s u p e r v i s o r y c i r c u i t s t h a t m o n i t o r p o w e r s u p p l y v o l t a g e l e v e l s a n d c o d e e x e c u t i o n i n t e g r i t y i n m i c r o p r o c e s s o r - b a s e d s y s t e m s . a s w e l l a s p r o v i d i n g p o w e r - o n r e s e t s i g n a l s , a n o n - c h i p w a t c h d o g t i m e r c a n r e s e t t h e m i c r o p r o c e s s o r i f i t f a i l s t o s t r o b e w i t h i n a p r e s e t t i m e o u t p e r i o d . a r e s e t s i g n a l c a n a l s o b e a s s e r t e d b y a n e x t e r n a l p u s h - b u t t o n s w i t c h t h r o u g h a m a n u a l r e s e t i n p u t . t h e s i x d e v i c e s f e a t u r e d i f f e r e n t c o m b i n a t i o n s o f w a t c h d o g i n p u t , m a n u a l r e s e t i n p u t , a n d o u t p u t s t a g e c o n f i g u r a t i o n , a s s h o w n i n t a b l e 6 . e a c h d e v i c e i s a v a i l a b l e i n a c h o i c e o f 2 6 r e s e t t h r e s h o l d o p t i o n s r a n g i n g f r o m 2 . 5 v t o 5 v i n 1 0 0 m v i n c r e m e n t s . t h e r e a r e a l s o f o u r r e s e t t i m e o u t o p t i o n s o f 1 m s , 2 0 m s , 1 4 0 m s , a n d 1 1 2 0 m s ( m i n i m u m ) a n d f o u r w a t c h d o g t i m e o u t o p t i o n s o f 6 . 3 m s , 1 0 2 m s , 1 . 6 s e c , a n d 2 5 . 6 s e c ( t y p i c a l ) . t h e a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 a r e a v a i l a b l e i n 5 - l e a d s o t - 2 3 p a c k a g e s a n d t y p i c a l l y c o n s u m e o n l y 1 0 a , m a k i n g t h e m s u i t a b l e f o r u s e i n l o w p o w e r , p o r t a b l e a p p l i c a t i o n s . a d m 8 3 1 6 v c c v c c m r g n d w d i r e s e t r e s e t g e n e r a t o r w a t c h d o g d e t e c t o r d e b o u n c e v r e f 1 1 7 7 9 - 0 0 1 a d m 8 3 2 0 v c c m r g n d w d i r e s e t r e s e t g e n e r a t o r w a t c h d o g d e t e c t o r v r e f 1 1 7 7 9 - 0 0 2 d e b o u n c e
a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 d a t a s h e e t r e v . 0 | p a g e 2 o f 1 6 t a b l e o f c o n t e n t s f e a t u r e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  a p p l i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  f u n c t i o n a l b l o c k d i a g r a m s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  g e n e r a l d e s c r i p t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  r e v i s i o n h i s t o r y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  s p e c i f i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  a b s o l u t e m a x i m u m r a t i n g s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  e s d c a u t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  p i n c o n f i g u r a t i o n s a n d f u n c t i o n d e s c r i p t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  t y p i c a l p e r f o r m a n c e c h a r a c t e r i s t i c s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  t h e o r y o f o p e r a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0  c i r c u i t d e s c r i p t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0  p u s h - p u l l r e s e t o u t p u t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0  o p e n - d r a i n r e s e t o u t p u t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0  m a n u a l r e s e t i n p u t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0  w a t c h d o g i n p u t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0  a p p l i c a t i o n s i n f o r m a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1  w a t c h d o g i n p u t c u r r e n t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1  n e g a t i v e g o i n g v c c t r a n s i e n t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1  e n s u r i n g r e s e t v a l i d t o v c c = 0 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1  w a t c h d o g s o f t w a r e c o n s i d e r a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1  o p t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2  o u t l i n e d i m e n s i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4  o r d e r i n g g u i d e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4  a u t o m o t i v e p r o d u c t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5  r e v i s i o n h i s t o r y 1 0 / 1 3 ? r e v i s i o n 0 : i n i t i a l v e r s i o n
d a t a s h e e t a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 r e v . 0 | p a g e 3 o f 1 6 s p e c i f i c a t i o n s v c c = ( v t h + 1 . 5 % ) t o 5 . 5 v , t a =  4 0 c t o + 1 2 5 c , u n l e s s o t h e r w i s e n o t e d . t y p i c a l v a l u e s a r e a t t a = 2 5 c . t a b l e 1 . p a r a m e t e r m i n t y p m a x u n i t t e s t c o n d i t i o n s / c o m m e n t s s u p p l y v c c o p e r a t i n g v o l t a g e r a n g e 1 0 . 9 5 . 5 v v c c t h a t g u a r a n t e e s v a l i d o u t p u t 0 . 9 v s u p p l y c u r r e n t ( w d i f l o a t i n g ) 1 0 2 0 a v c c = 5 . 5 v 1 0 1 8 a v c c = 3 . 6 v r e s e t t h r e s h o l d v o l t a g e 2 v t h  1 % v t h v t h + 1 % v t a = 2 5 c v t h  1 . 5 % v t h v t h + 1 . 5 % v t a =  4 0 c t o + 1 2 5 c r e s e t t h r e s h o l d t e m p e r a t u r e c o e f f i c i e n t 2 0 p p m / c r e s e t t h r e s h o l d h y s t e r e s i s 2 . 5 v t h m v r e s e t t i m e o u t p e r i o d s e e t a b l e 7 r e s e t t i m e o u t o p t i o n a 1 1 . 4 1 . 8 m s r e s e t t i m e o u t o p t i o n b 2 0 2 8 3 6 m s r e s e t t i m e o u t o p t i o n c 1 4 0 2 0 0 2 6 0 m s r e s e t t i m e o u t o p t i o n d 1 1 2 0 1 6 0 0 2 0 8 0 m s v c c t o r e s e t d e l a y , t r d 9 0 s v c c f a l l i n g a t 1 m v / s p u s h - p u l l o u t p u t ( a d m 8 3 1 6 , a d m 8 3 1 8 , a d m 8 3 1 9 , a d m 8 3 2 1 , a d m 8 3 2 2 ) r e s e t o u t p u t v o l t a g e 0 . 2 v v c c  0 . 9 v , i s i n k = 2 5 a 0 . 2 v v c c  1 . 2 v , i s i n k = 1 0 0 a 0 . 2 v v c c  2 . 7 v , i s i n k = 1 . 2 m a 0 . 3 v v c c  4 . 5 v , i s i n k = 3 . 2 m a 0 . 9 v c c v v c c  2 . 7 v , i s o u r c e = 5 0 0 a 0 . 9 v c c v v c c  4 . 5 v , i s o u r c e = 8 0 0 a r e s e t r i s e t i m e 5 0 1 0 0 n s f r o m 1 0 % t o 9 0 % v c c , c l = 5 p f , v c c = 3 . 3 v r e s e t o u t p u t v o l t a g e 0 . 2 v v c c  2 . 7 v , i s i n k = 1 . 2 m a 0 . 3 v v c c  4 . 5 v , i s i n k = 3 . 2 m a 0 . 9 v c c v v c c  2 . 7 v , i s o u r c e = 5 0 0 a 0 . 9 v c c v v c c  4 . 5 v , i s o u r c e = 8 0 0 a o p e n - d r a i n o u t p u t ( a d m 8 3 2 0 , a d m 8 3 2 1 , a d m 8 3 2 2 ) r e s e t o u t p u t v o l t a g e 0 . 2 v v c c  0 . 9 v , i s i n k = 2 5 a 0 . 2 v v c c  1 . 2 v , i s i n k = 1 0 0 a 0 . 2 v v c c  2 . 7 v , i s i n k = 1 . 2 m a 0 . 3 v v c c  4 . 5 v , i s i n k = 3 . 2 m a o p e n - d r a i n r e s e t o u t p u t l e a k a g e c u r r e n t 1 a w a t c h d o g i n p u t ( a d m 8 3 1 6 , a d m 8 3 1 8 , a d m 8 3 2 0 , a d m 8 3 2 1 ) w a t c h d o g t i m e o u t p e r i o d , t w d s e e t a b l e 8 w a t c h d o g t i m e o u t o p t i o n w 4 . 5 6 . 3 8 . 1 m s w a t c h d o g t i m e o u t o p t i o n x 7 2 1 0 2 1 3 2 m s w a t c h d o g t i m e o u t o p t i o n y 1 . 1 2 1 . 6 2 . 2 4 s e c w a t c h d o g t i m e o u t o p t i o n z 1 8 . 0 2 5 . 6 3 3 . 2 s e c w d i p u l s e w i d t h 5 0 n s v i l = 0 . 3 v c c , v i h = 0 . 7 v c c w d i i n p u t t h r e s h o l d 0 . 3 v c c 0 . 7 v c c v w d i i n p u t c u r r e n t 3 5 1 0 0 a
a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 d a t a s h e e t r e v . 0 | p a g e 4 o f 1 6 p a r a m e t e r m i n t y p m a x u n i t t e s t c o n d i t i o n s / c o m m e n t s m a n u a l r e s e t i n p u t ( a d m 8 3 1 6 , a d m 8 3 1 9 , a d m 8 3 2 0 , a d m 8 3 2 2 ) v i l 0 . 8 v v i h 2 . 0 v m r i n p u t p u l s e w i d t h 1 s m r g l i t c h r e j e c t i o n 1 0 0 n s m r p u l l - u p r e s i s t a n c e 3 5 7 5 1 2 5 k  m r t o r e s e t d e l a y 3 5 0 n s v c c = 5 v 1 t h e d e v i c e s w i t c h e s f r o m u n d e r v o l t a g e r e s e t t o n o r m a l o p e r a t i o n w h e n 1 . 5 v < v c c < 2 . 5 v . 2 t h e d e v i c e m o n i t o r s v c c t h r o u g h a n i n t e r n a l f a c t o r y t r i m m e d v o l t a g e d i v i d e r t h a t p r o g r a m s t h e n o m i n a l r e s e t t h r e s h o l d . f a c t o r y - t r i m m e d r e s e t t h r e s h o l d s a r e a v a i l a b l e i n a p p r o x i m a t e l y 1 0 0 m v i n c r e m e n t s f r o m 2 . 5 v t o 5 v .
d a t a s h e e t a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 r e v . 0 | p a g e 5 o f 1 6 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 , u n l e s s o t h e r w i s e n o t e d . t a b l e 2 . p a r a m e t e r r a t i n g v c c  0 . 3 v t o + 6 v a l l o t h e r p i n s  0 . 3 v t o ( v c c + 0 . 3 v ) o u t p u t c u r r e n t ( r e s e t , r e s e t ) 2 0 m a o p e r a t i n g t e m p e r a t u r e r a n g e  4 0 c t o + 1 2 5 c s t o r a g e t e m p e r a t u r e r a n g e  6 5 c t o + 1 5 0 c  j a t h e r m a l i m p e d a n c e , s o t - 2 3 2 7 0 c / w l e a d t e m p e r a t u r e s o l d e r i n g ( 1 0 s e c ) 3 0 0 c v a p o r p h a s e ( 6 0 s e c ) 2 1 5 c i n f r a r e d ( 1 5 s e c ) 2 2 0 c s t r e s s e s a b o v e t h o s e l i s t e d u n d e r a b s o l u t e m a x i m u m r a t i n g s m a y c a u s e p e r m a n e n t d a m a g e t o t h e d e v i c e . t h i s i s a s t r e s s r a t i n g o n l y ; f u n c t i o n a l o p e r a t i o n o f t h e d e v i c e a t t h e s e o r a n y o t h e r c o n d i t i o n s a b o v e t h o s e i n d i c a t e d i n t h e o p e r a t i o n a l s e c t i o n o f t h i s s p e c i f i c a t i o n i s n o t i m p l i e d . e x p o s u r e t o a b s o l u t e m a x i m u m r a t i n g c o n d i t i o n s f o r e x t e n d e d p e r i o d s m a y a f f e c t d e v i c e r e l i a b i l i t y . e s d c a u t i o n
a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 d a t a s h e e t r e v . 0 | p a g e 6 o f 1 6 p i n c o n f i g u r a t i o n s a n d f u n c t i o n d e s c r i p t i o n s f i g u r e 3 . a d m 8 3 1 6 / a d m 8 3 2 0 p i n c o n f i g u r a t i o n t a b l e 3 . a d m 8 3 1 6 / a d m 8 3 2 0 p i n f u n c t i o n d e s c r i p t i o n s p i n n o . m n e m o n i c d e s c r i p t i o n 1 r e s e t a c t i v e l o w r e s e t o u t p u t . a s s e r t e d w h e n e v e r v c c i s b e l o w t h e r e s e t t h r e s h o l d , v t h . t h i s p i n i s a p u s h - p u l l o u t p u t s t a g e f o r t h e a d m 8 3 1 6 a n d a n o p e n - d r a i n o u t p u t s t a g e f o r t h e a d m 8 3 2 0 . 2 g n d g r o u n d . 3 m r m a n u a l r e s e t i n p u t . t h i s i s a n a c t i v e l o w i n p u t t h a t , w h e n f o r c e d l o w f o r g r e a t e r t h a n t h e g l i t c h f i l t e r t i m e , g e n e r a t e s a r e s e t . i t f e a t u r e s a 7 5 k  i n t e r n a l p u l l - u p r e s i s t o r . 4 w d i w a t c h d o g i n p u t . g e n e r a t e s a r e s e t i f t h e l o g i c l e v e l o n t h e p i n r e m a i n s l o w o r h i g h f o r t h e d u r a t i o n o f t h e w a t c h d o g t i m e o u t . t h e t i m e r i s c l e a r e d i f a l o g i c t r a n s i t i o n o c c u r s o n t h i s p i n o r i f a r e s e t i s g e n e r a t e d . l e a v e t h i s p i n f l o a t i n g t o d i s a b l e t h e w a t c h d o g t i m e r . 5 v c c p o w e r s u p p l y v o l t a g e b e i n g m o n i t o r e d . f i g u r e 4 . a d m 8 3 1 8 / a d m 8 3 2 1 p i n c o n f i g u r a t i o n t a b l e 4 . a d m 8 3 1 8 / a d m 8 3 2 1 p i n f u n c t i o n d e s c r i p t i o n s p i n n o . m n e m o n i c d e s c r i p t i o n 1 r e s e t a c t i v e l o w r e s e t o u t p u t . a s s e r t e d w h e n e v e r v c c i s b e l o w t h e r e s e t t h r e s h o l d , v t h . t h i s p i n i s a p u s h - p u l l o u t p u t s t a g e f o r t h e a d m 8 3 1 8 a n d a n o p e n - d r a i n o u t p u t s t a g e f o r t h e a d m 8 3 2 1 . 2 g n d g r o u n d . 3 r e s e t a c t i v e h i g h p u s h - p u l l r e s e t o u t p u t . 4 w d i w a t c h d o g i n p u t . g e n e r a t e s a r e s e t i f t h e l o g i c l e v e l o n t h e p i n r e m a i n s l o w o r h i g h f o r t h e d u r a t i o n o f t h e w a t c h d o g t i m e o u t . t h e t i m e r i s c l e a r e d i f a l o g i c t r a n s i t i o n o c c u r s o n t h i s p i n o r i f a r e s e t i s g e n e r a t e d . l e a v e t h i s p i n f l o a t i n g t o d i s a b l e t h e w a t c h d o g t i m e r . 5 v c c p o w e r s u p p l y v o l t a g e b e i n g m o n i t o r e d . f i g u r e 5 . a d m 8 3 1 9 / a d m 8 3 2 2 p i n c o n f i g u r a t i o n t a b l e 5 . a d m 8 3 1 9 / a d m 8 3 2 2 p i n f u n c t i o n d e s c r i p t i o n s p i n n o . m n e m o n i c d e s c r i p t i o n 1 r e s e t a c t i v e l o w r e s e t o u t p u t . a s s e r t e d w h e n e v e r v c c i s b e l o w t h e r e s e t t h r e s h o l d , v t h . t h i s p i n i s a p u s h - p u l l o u t p u t s t a g e f o r t h e a d m 8 3 1 9 a n d a n o p e n - d r a i n o u t p u t s t a g e f o r t h e a d m 8 3 2 2 . 2 g n d g r o u n d . 3 r e s e t a c t i v e h i g h p u s h - p u l l r e s e t o u t p u t . 4 m r m a n u a l r e s e t i n p u t . t h i s i s a n a c t i v e l o w i n p u t t h a t , w h e n f o r c e d l o w f o r g r e a t e r t h a n t h e g l i t c h f i l t e r t i m e , g e n e r a t e s a r e s e t . i t f e a t u r e s a 7 5 k  i n t e r n a l p u l l - u p r e s i s t o r . 5 v c c p o w e r s u p p l y v o l t a g e b e i n g m o n i t o r e d . r e s e t g n d m r 1 3 2 v c c 5 w d i 4 a d m 8 3 1 6 / a d m 8 3 2 0 t o p v i e w ( n o t t o s c a l e ) 1 1 7 7 9 - 0 0 3 r e s e t g n d r e s e t 1 3 2 v c c 5 w d i 4 a d m 8 3 1 8 / a d m 8 3 2 1 t o p v i e w ( n o t t o s c a l e ) 1 1 7 7 9 - 0 0 4 m r r e s e t g n d r e s e t 1 3 2 v c c 5 4 a d m 8 3 1 9 / a d m 8 3 2 2 t o p v i e w ( n o t t o s c a l e ) 1 1 7 7 9 - 0 0 5
d a t a s h e e t a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 r e v . 0 | p a g e 7 o f 1 6 t y p i c a l p e r f o r m a n c e c h a r a c t e r i s t i c s f i g u r e 6 . s u p p l y c u r r e n t ( i c c ) v s . t e m p e r a t u r e f i g u r e 7 . s u p p l y c u r r e n t ( i c c ) v s . s u p p l y v o l t a g e ( v c c ) f i g u r e 8 . n o r m a l i z e d r e s e t t h r e s h o l d v s . t e m p e r a t u r e f i g u r e 9 . v c c t o r e s e t d e l a y v s . t e m p e r a t u r e f i g u r e 1 0 . m a n u a l r e s e t t o r e s e t p r o p a g a t i o n d e l a y v s . t e m p e r a t u r e f i g u r e 1 1 . n o r m a l i z e d r e s e t t i m e o u t v s . t e m p e r a t u r e 0 1 2 3 4 5 6 7 8 9 1 1 1 0 1 2 1 3 1 4 ? 4 0 i c c ( a ) ? 2 0 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 t e m p e r a t u r e ( c ) v c c = 5 . 0 v v c c = 3 . 0 v v c c = 1 . 5 v 1 1 7 7 9 - 0 0 6 0 2 4 6 8 1 0 1 2 i c c ( a ) v c c ( v ) 0 0 . 4 0 . 8 1 . 2 1 . 6 2 . 0 2 . 4 2 . 8 3 . 2 3 . 6 4 . 0 4 . 4 4 . 8 5 . 2 5 . 6 1 1 7 7 9 - 0 0 7 0 . 9 5 0 . 9 6 0 . 9 7 0 . 9 8 0 . 9 9 1 . 0 0 1 . 0 1 1 . 0 2 1 . 0 3 1 . 0 4 1 . 0 5 ? 4 0 ? 2 0 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 n o r m a l i z e d r e s e t t h r e s h o l d t e m p e r a t u r e ( c ) 1 1 7 7 9 - 0 0 8 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 v c c t o r e s e t d e l a y ( s ) t e m p e r a t u r e ( c ) v t h = 2 . 9 3 v v t h = 2 . 5 v v t h = 5 v 1 1 7 7 9 - 0 0 9 ? 4 0 ? 2 0 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 0 5 0 1 0 0 1 5 0 2 0 0 2 5 0 3 0 0 3 5 0 4 0 0 4 5 0 5 0 0 p r o p a g a t i o n d e l a y ( n s ) t e m p e r a t u r e ( c ) v t h = 2 . 9 3 v v t h = 2 . 5 v v t h = 5 v 1 1 7 7 9 - 0 1 0 ? 4 0 ? 2 0 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 0 . 8 0 0 . 8 5 0 . 9 0 0 . 9 5 1 . 0 0 1 . 0 5 1 . 1 0 1 . 1 5 1 . 2 0 n o r m a l i z e d r e s e t t i m e o u t t e m p e r a t u r e ( c ) 1 1 7 7 9 - 0 1 1 ? 4 0 ? 2 0 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0
a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 d a t a s h e e t r e v . 0 | p a g e 8 o f 1 6 f i g u r e 1 2 . n o r m a l i z e d w a t c h d o g t i m e o u t v s . t e m p e r a t u r e f i g u r e 1 3 . m a x i m u m v c c t r a n s i e n t d u r a t i o n v s . r e s e t t h r e s h o l d o v e r d r i v e f i g u r e 1 4 . m a n u a l r e s e t ( m r ) m i n i m u m p u l s e w i d t h v s . t e m p e r a t u r e f i g u r e 1 5 . w a t c h d o g i n p u t m i n i m u m p u l s e w i d t h v s . t e m p e r a t u r e f i g u r e 1 6 . r e s e t o p e n - d r a i n v o l v o l t a g e v s . v c c v o l t a g e ( v t h = 3 v ) f i g u r e 1 7 . r e s e t p u s h - p u l l v o l v o l t a g e v s . v c c v o l t a g e ( v t h = 4 v ) 0 . 9 0 0 . 9 5 1 . 0 0 1 . 0 5 1 . 1 0 1 . 1 5 1 . 2 0 n o r m a l i z e d w a t c h d o g t i m e o u t t e m p e r a t u r e ( c ) 1 1 7 7 9 - 0 1 2 ? 4 0 ? 2 0 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 0 1 0 0 1 0 0 0 m a x i m u m t r a n s i e n t d u r a t i o n ( s ) o v e r d r i v e v o l t a g e ( m v ) v t h = 2 . 9 3 v r e s e t a s s e r t e d a b o v e c u r v e v t h = 4 . 6 3 v v t h = 5 v 1 1 7 7 9 - 0 1 3 ? 4 0 ? 2 0 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 6 5 0 6 6 0 6 7 0 6 8 0 6 9 0 7 0 0 7 1 0 7 2 0 7 3 0 7 4 0 7 5 0 7 6 0 7 7 0 7 8 0 7 9 0 8 0 0 8 1 0 8 2 0 8 3 0 8 4 0 8 5 0 m r m i n i m u m p u l s e w i d t h ( n s ) t e m p e r a t u r e ( c ) 1 1 7 7 9 - 0 1 4 v t h = 2 . 5 v v t h = 2 . 9 3 v v t h = 5 v 0 1 2 3 4 5 6 7 8 9 m i n i m u m p u l s e w i d t h ( n s ) t e m p e r a t u r e ( c ) ? 4 0 ? 2 0 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 n e g a t i v e p u l s e p o s i t i v e p u l s e 1 1 7 7 9 - 0 1 5 1 . 1 1 . 3 1 . 5 1 . 7 1 . 9 2 . 1 2 . 3 2 . 5 2 . 7 2 . 9 r e s e t v o l t a g e ( v ) v c c v o l t a g e ( v ) 0 . 0 0 8 0 . 0 5 8 0 . 1 0 8 0 . 1 5 8 0 . 2 0 8 0 . 2 5 8 0 . 3 0 8 1 1 7 7 9 - 0 1 6 i s i n k = 3 . 2 m a i s i n k = 8 0 0 a 0 0 . 0 5 0 . 1 0 0 . 1 5 0 . 2 0 0 . 2 5 0 . 3 0 1 . 1 1 . 3 1 . 5 1 . 7 1 . 9 2 . 1 2 . 3 2 . 5 2 . 7 2 . 9 3 . 1 3 . 3 3 . 5 3 . 7 3 . 9 r e s e t v o l t a g e ( v ) v c c v o l t a g e ( v ) 1 1 7 7 9 - 0 1 7 i s i n k = 3 . 2 m a i s i n k = 8 0 0 a
d a t a s h e e t a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 r e v . 0 | p a g e 9 o f 1 6 f i g u r e 1 8 . r e s e t p u s h - p u l l v o h v o l t a g e v s . v c c v o l t a g e ( v t h = 3 v ) f i g u r e 1 9 . r e s e t p u s h - p u l l r i s e t i m e v s . v c c v o l t a g e 0 0 . 5 1 . 0 1 . 5 2 . 0 2 . 5 3 . 0 3 . 5 1 . 1 1 . 3 1 . 5 1 . 7 1 . 9 2 . 1 2 . 3 2 . 5 2 . 7 2 . 9 r e s e t v o l t a g e ( v ) v c c v o l t a g e ( v ) i s o u r c e = 3 . 2 m a i s o u r c e = 8 0 0 a 1 1 7 7 9 - 0 1 8 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 . 6 2 . 8 3 . 0 3 . 2 3 . 4 3 . 6 3 . 8 4 . 0 4 . 2 4 . 4 4 . 6 4 . 8 5 . 0 5 . 2 5 . 4 r i s e t i m e ( n s ) v c c v o l t a g e ( v ) 1 1 7 7 9 - 0 1 9
a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 d a t a s h e e t r e v . 0 | p a g e 1 0 o f 1 6 t h e o r y o f o p e r a t i o n c i r c u i t d e s c r i p t i o n t h e a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 p r o v i d e m i c r o p r o c e s s o r s u p p l y v o l t a g e s u p e r v i s i o n b y c o n t r o l l i n g t h e m i c r o p r o c e s s o r r e s e t i n p u t . c o d e e x e c u t i o n e r r o r s a r e a v o i d e d d u r i n g p o w e r - u p , p o w e r - d o w n , a n d b r o w n o u t c o n d i t i o n s b y a s s e r t i n g a r e s e t s i g n a l w h e n t h e s u p p l y v o l t a g e i s b e l o w a p r e s e t t h r e s h o l d a n d b y a l l o w i n g s u p p l y v o l t a g e s t a b i l i z a t i o n w i t h a f i x e d t i m e o u t r e s e t d e l a y a f t e r t h e s u p p l y v o l t a g e r i s e s a b o v e t h e t h r e s h o l d . i n a d d i t i o n , p r o b l e m s w i t h m i c r o p r o c e s s o r c o d e e x e c u t i o n c a n b e m o n i t o r e d a n d c o r r e c t e d w i t h a w a t c h d o g t i m e r ( a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 2 0 / a d m 8 3 2 1 ) . i f t h e u s e r d e t e c t s a p r o b l e m w i t h s y s t e m o p e r a t i o n , a m a n u a l r e s e t i n p u t i s a v a i l a b l e ( a d m 8 3 1 6 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 2 ) t o r e s e t t h e m i c r o p r o c e s s o r , f o r e x a m p l e , b y m e a n s o f a n e x t e r n a l p u s h - b u t t o n s w i t c h . p u s h - p u l l r e s e t o u t p u t t h e a d m 8 3 1 6 f e a t u r e s a n a c t i v e l o w p u s h - p u l l r e s e t o u t p u t , w h e r e a s t h e a d m 8 3 2 1 / a d m 8 3 2 2 h a v e a c t i v e h i g h p u s h - p u l l r e s e t o u t p u t s . t h e a d m 8 3 1 8 / a d m 8 3 1 9 f e a t u r e d u a l a c t i v e l o w a n d a c t i v e h i g h p u s h - p u l l r e s e t o u t p u t s . f o r a c t i v e l o w a n d a c t i v e h i g h o u t p u t s , t h e r e s e t s i g n a l i s g u a r a n t e e d t o b e v a l i d f o r v c c d o w n t o 0 . 9 v . t h e r e s e t o u t p u t i s a s s e r t e d w h e n v c c i s b e l o w t h e r e s e t t h r e s h - o l d ( v t h ) , w h e n m r i s d r i v e n l o w , o r w h e n w d i i s n o t s e r v i c e d w i t h i n t h e w a t c h d o g t i m e o u t p e r i o d ( t w d ) . t h e r e s e t o u t p u t r e m a i n s a s s e r t e d f o r t h e d u r a t i o n o f t h e r e s e t a c t i v e t i m e o u t p e r i o d ( t r p ) a f t e r v c c r i s e s a b o v e t h e r e s e t t h r e s h o l d , a f t e r m r t r a n s i t i o n s f r o m l o w t o h i g h , o r a f t e r t h e w a t c h d o g t i m e r t i m e s o u t . f i g u r e 2 0 i l l u s t r a t e s t h e b e h a v i o r o f t h e r e s e t o u t p u t s . f i g u r e 2 0 . r e s e t t i m i n g d i a g r a m o p e n - d r a i n r e s e t o u t p u t t h e a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 h a v e a n a c t i v e l o w , o p e n - d r a i n r e s e t o u t p u t . t h i s o u t p u t s t r u c t u r e r e q u i r e s a n e x t e r n a l p u l l - u p r e s i s t o r t o c o n n e c t t h e r e s e t o u t p u t t o a v o l t a g e r a i l n o h i g h e r t h a n v c c . a r e s i s t o r t h a t c o m p l i e s w i t h t h e l o g i c l o w a n d l o g i c h i g h v o l t a g e l e v e l r e q u i r e m e n t s o f t h e m i c r o p r o c e s s o r w h i l e s u p p l y i n g i n p u t c u r r e n t a n d l e a k a g e p a t h s o n t h e r e s e t l i n e i s r e c o m m e n d e d . a 1 0 k  r e s i s t o r i s a d e q u a t e i n m o s t s i t u a t i o n s . m a n u a l r e s e t i n p u t t h e a d m 8 3 1 6 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 2 f e a t u r e a m a n u a l r e s e t i n p u t ( m r ) , w h i c h w h e n d r i v e n l o w , a s s e r t s t h e r e s e t o u t p u t . w h e n m r t r a n s i t i o n s f r o m l o w t o h i g h , t h e r e s e t r e m a i n s a s s e r t e d f o r t h e d u r a t i o n o f t h e r e s e t a c t i v e t i m e o u t p e r i o d b e f o r e d e a s s e r t i n g . t h e m r i n p u t h a s a 7 5 k  , i n t e r n a l p u l l - u p r e s i s t o r s o t h a t t h e i n p u t i s a l w a y s h i g h w h e n u n c o n n e c t e d . a n e x t e r n a l p u s h - b u t t o n s w i t c h c a n b e c o n n e c t e d b e t w e e n m r a n d g r o u n d s o t h a t t h e u s e r c a n g e n e r a t e a r e s e t . d e b o u n c e c i r c u i t r y f o r t h i s p u r p o s e i s i n t e g r a t e d o n c h i p . n o i s e i m m u n i t y i s p r o v i d e d o n t h e m r i n p u t , a n d f a s t , n e g a t i v e g o i n g t r a n s i e n t s o f u p t o 1 0 0 n s ( t y p i c a l ) a r e i g n o r e d . a 0 . 1 f c a p a c i t o r b e t w e e n m r a n d g r o u n d p r o v i d e s a d d i t i o n a l n o i s e i m m u n i t y . w a t c h d o g i n p u t t h e a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 2 0 / a d m 8 3 2 1 f e a t u r e a w a t c h d o g t i m e r t h a t m o n i t o r s m i c r o p r o c e s s o r a c t i v i t y . a t i m e r c i r c u i t i s c l e a r e d w i t h e v e r y l o w - t o - h i g h o r h i g h - t o - l o w l o g i c t r a n s i t i o n o n t h e w a t c h d o g i n p u t p i n ( w d i ) , w h i c h d e t e c t s p u l s e s a s s h o r t a s 5 0 n s . i f t h e t i m e r c o u n t s t h r o u g h t h e p r e s e t w a t c h d o g t i m e o u t p e r i o d ( t w d ) , a r e s e t i s a s s e r t e d . t h e m i c r o - p r o c e s s o r i s r e q u i r e d t o t o g g l e t h e w d i p i n t o a v o i d a s s e r t i n g t h e r e s e t p i n . f a i l u r e o f t h e m i c r o p r o c e s s o r t o t o g g l e w d i w i t h i n t h e t i m e o u t p e r i o d , t h e r e f o r e , i n d i c a t e s a c o d e e x e c u t i o n e r r o r , a n d t h e r e s e t p u l s e g e n e r a t e d r e s t a r t s t h e m i c r o p r o c e s s o r i n a k n o w n s t a t e . a s w e l l a s l o g i c t r a n s i t i o n s o n w d i , t h e w a t c h d o g t i m e r i s a l s o c l e a r e d b y a r e s e t a s s e r t i o n d u e t o a n u n d e r v o l t a g e c o n d i t i o n o n v c c o r d u e t o m r b e i n g p u l l e d l o w . w h e n a r e s e t a s s e r t s , t h e w a t c h d o g t i m e r c l e a r s a n d d o e s n o t b e g i n c o u n t i n g a g a i n u n t i l t h e r e s e t d e a s s s e r t s . t h e w a t c h d o g t i m e r c a n b e d i s a b l e d b y l e a v i n g w d i f l o a t i n g o r b y t r i s t a t i n g t h e w d i d r i v e r . f i g u r e 2 1 . w a t c h d o g t i m i n g d i a g r a m v c c 1 v v c c 0 v v c c 0 v v t h v t h 0 v v c c r e s e t r e s e t t r d t r d 1 v t r p t r p 1 1 7 7 9 - 0 2 0 v c c 1 v v c c 0 v v c c 0 v v t h 0 v v c c w d i r e s e t t r p t r p t w d 1 1 7 7 9 - 0 2 1
d a t a s h e e t a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 r e v . 0 | p a g e 1 1 o f 1 6 a p p l i c a t i o n s i n f o r m a t i o n w a t c h d o g i n p u t c u r r e n t t o m i n i m i z e t h e w a t c h d o g i n p u t c u r r e n t , l e a v e w d i l o w f o r t h e m a j o r i t y o f t h e w a t c h d o g t i m e o u t p e r i o d . w h e n d r i v e n h i g h , w d i c a n d r a w a s m u c h a s 1 0 0 a . p u l s i n g w d i l o w t o h i g h t o l o w a t a l o w d u t y c y c l e r e d u c e s t h e e f f e c t o f t h e l a r g e i n p u t c u r r e n t . w h e n w d i i s u n c o n n e c t e d , a w i n d o w c o m p a r a t o r d i s c o n n e c t s t h e w a t c h d o g t i m e r f r o m t h e r e s e t o u t p u t c i r c u i t r y s o t h a t a r e s e t i s n o t a s s e r t e d w h e n t h e w a t c h d o g t i m e r t i m e s o u t . n e g a t i v e g o i n g v c c t r a n s i e n t s t o a v o i d u n n e c e s s a r y r e s e t s c a u s e d b y f a s t p o w e r s u p p l y t r a n s i e n t s , t h e a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 a r e e q u i p p e d w i t h g l i t c h r e j e c t i o n c i r c u i t r y . t h e t y p i c a l p e r f o r m a n c e c h a r a c t e r i s t i c i n f i g u r e 1 3 p l o t s v c c t r a n s i e n t d u r a t i o n v s . r e s e t t h r e s h o l d o v e r d r i v e . t h e c u r v e s s h o w c o m b i n a t i o n s o f r e s e t t h r e s h o l d o v e r d r i v e a n d d u r a t i o n f o r w h i c h a r e s e t i s n o t g e n e r a t e d f o r 5 v , 4 . 6 3 v , a n d 2 . 9 3 v r e s e t t h r e s h o l d d e v i c e s . f o r e x a m p l e , w i t h t h e 2 . 9 3 v t h r e s h o l d , a t r a n s i e n t t h a t g o e s 1 0 0 m v b e l o w t h e t h r e s h o l d a n d l a s t s 8 0 s t y p i c a l l y d o e s n o t c a u s e a r e s e t , b u t i f t h e t r a n s i e n t i s a n y l a r g e r i n r e s e t t h r e s h o l d o v e r d r i v e o r d u r a t i o n , a r e s e t g e n e r a t e s . a n o p t i o n a l 0 . 1 f b y p a s s c a p a c i t o r m o u n t e d n e a r v c c p r o v i d e s a d d i t i o n a l g l i t c h r e j e c t i o n . e n s u r i n g r e s e t v a l i d t o v c c = 0 v b o t h a c t i v e l o w a n d a c t i v e h i g h r e s e t o u t p u t s a r e g u a r a n t e e d t o b e v a l i d f o r v c c a s l o w a s 0 . 9 v . h o w e v e r , b y u s i n g a n e x t e r n a l r e s i s t o r w i t h p u s h - p u l l c o n f i g u r e d r e s e t o u t p u t s , v a l i d o u t p u t s f o r v c c a s l o w a s 0 v a r e p o s s i b l e . f o r a n a c t i v e l o w r e s e t o u t p u t , a r e s i s t o r c o n n e c t e d b e t w e e n r e s e t a n d g r o u n d p u l l s t h e o u t p u t l o w w h e n i t i s u n a b l e t o s i n k c u r r e n t . f o r a n a c t i v e h i g h r e s e t o u t p u t , a r e s i s t o r c o n n e c t e d b e t w e e n r e s e t a n d v c c p u l l s t h e o u t p u t h i g h w h e n i t i s u n a b l e t o s o u r c e c u r r e n t . u s e a l a r g e r e s i s t a n c e , s u c h a s 1 0 0 k  , s o t h a t i t d o e s n o t o v e r l o a d t h e r e s e t o u t p u t w h e n v c c i s g r e a t e r t h a n 0 . 9 v . f i g u r e 2 2 . e n s u r i n g r e s e t v a l i d t o v c c = 0 v w a t c h d o g s o f t w a r e c o n s i d e r a t i o n s i n i m p l e m e n t i n g t h e m i c r o p r o c e s s o r w a t c h d o g s t r o b e c o d e , q u i c k l y s w i t c h i n g w d i l o w t o h i g h a n d t h e n h i g h t o l o w ( m i n i - m i z i n g w d i h i g h t i m e ) i s d e s i r a b l e f o r c u r r e n t c o n s u m p t i o n r e a s o n s . h o w e v e r , a m o r e e f f e c t i v e w a y o f u s i n g t h e w a t c h d o g f u n c t i o n c a n b e c o n s i d e r e d . a l o w t o h i g h t o l o w w d i p u l s e w i t h i n a g i v e n s u b r o u t i n e p r e v e n t s t h e w a t c h d o g f r o m t i m i n g o u t . h o w e v e r , i f t h e s u b - r o u t i n e b e c o m e s s t u c k i n a n i n f i n i t e l o o p , t h e w a t c h d o g c a n n o t d e t e c t t h i s b e c a u s e t h e s u b r o u t i n e c o n t i n u e s t o t o g g l e w d i . a m o r e e f f e c t i v e c o d i n g s c h e m e f o r d e t e c t i n g t h i s e r r o r i n v o l v e s u s i n g a s l i g h t l y l o n g e r w a t c h d o g t i m e o u t . i n t h e p r o g r a m t h a t c a l l s t h e s u b r o u t i n e , w d i i s s e t h i g h . t h e s u b r o u t i n e s e t s w d i l o w w h e n i t i s c a l l e d . i f t h e p r o g r a m e x e c u t e s w i t h o u t e r r o r , w d i i s t o g g l e d h i g h a n d l o w w i t h e v e r y l o o p o f t h e p r o g r a m . i f t h e s u b r o u t i n e e n t e r s a n i n f i n i t e l o o p , w d i i s k e p t l o w , t h e w a t c h d o g t i m e s o u t , a n d t h e m i c r o p r o c e s s o r i s r e s e t ( s e e f i g u r e 2 3 ) . f i g u r e 2 3 . w a t c h d o g f l o w d i a g r a m f i g u r e 2 4 . t y p i c a l a p p l i c a t i o n c i r c u i t a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 v c c r e s e t 1 0 0 k ? a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 1 / a d m 8 3 2 2 v c c r e s e t 1 0 0 n? 1 1 7 7 9 - 0 2 2 s t a r t s e t w d i h i g h p r o g r a m c o d e s u b r o u t i n e s e t w d i l o w r e t u r n i n f i n i t e l o o p : w a t c h d o g t i m e s o u t r e s e t 1 1 7 7 9 - 0 2 3 r e s e t r e s e t w d i i / o m r a d m 8 3 1 6 v c c m i c r o p r o c e s s o r 1 1 7 7 9 - 0 2 4
a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 d a t a s h e e t r e v . 0 | p a g e 1 2 o f 1 6 o p t i o n s t a b l e 6 . s e l e c t i o n t a b l e d e v i c e n o . w a t c h d o g m a n u a l r e s e t o u t p u t s t a g e r e s e t r e s e t a d m 8 3 1 6 y e s y e s p u s h - p u l l n o a d m 8 3 1 8 y e s n o p u s h - p u l l p u s h - p u l l a d m 8 3 1 9 n o y e s p u s h - p u l l p u s h - p u l l a d m 8 3 2 0 y e s y e s o p e n - d r a i n n o a d m 8 3 2 1 y e s n o o p e n - d r a i n p u s h - p u l l a d m 8 3 2 2 n o y e s o p e n - d r a i n p u s h - p u l l t a b l e 7 . r e s e t t i m e o u t o p t i o n s s u f f i x m i n i m u m t y p i c a l m a x i m u m u n i t a 1 1 . 4 1 . 8 m s b 2 0 2 8 3 6 m s c 1 4 0 2 0 0 2 6 0 m s d 1 1 2 0 1 6 0 0 2 0 8 0 m s t a b l e 8 . w a t c h d o g t i m e o u t o p t i o n s s u f f i x m i n i m u m t y p i c a l m a x i m u m u n i t w 4 . 5 6 . 3 8 . 1 m s x 7 2 1 0 2 1 3 2 m s y 1 . 1 2 1 . 6 2 . 2 4 s e c z 1 8 . 0 2 5 . 6 3 3 . 2 s e c t a b l e 9 . r e s e t v o l t a g e t h r e s h o l d o p t i o n s r e s e t t h r e s h o l d n u m b e r t a = 2 5 c t a =  4 0 c t o + 1 2 5 c u n i t m i n i m u m t y p i c a l m a x i m u m m i n i m u m m a x i m u m 5 0 4 . 9 5 0 5 . 0 0 0 5 . 0 5 0 4 . 9 2 5 5 . 0 7 5 v 4 9 4 . 8 5 1 4 . 9 0 0 4 . 9 4 9 4 . 8 2 6 4 . 9 7 4 v 4 8 4 . 7 5 2 4 . 8 0 0 4 . 8 4 8 4 . 7 2 8 4 . 8 7 2 v 4 7 4 . 6 5 3 4 . 7 0 0 4 . 7 4 7 4 . 6 2 9 4 . 7 7 1 v 4 6 4 . 5 8 4 4 . 6 3 0 4 . 6 7 6 4 . 5 6 0 4 . 7 0 0 v 4 5 4 . 4 5 5 4 . 5 0 0 4 . 5 4 5 4 . 4 3 2 4 . 5 6 8 v 4 4 4 . 3 4 6 4 . 3 9 0 4 . 4 3 4 4 . 3 2 4 4 . 4 5 6 v 4 3 4 . 2 5 7 4 . 3 0 0 4 . 3 4 3 4 . 2 3 5 4 . 3 6 5 v 4 2 4 . 1 5 8 4 . 2 0 0 4 . 2 4 2 4 . 1 3 7 4 . 2 6 3 v 4 1 4 . 0 5 9 4 . 1 0 0 4 . 1 4 1 4 . 0 3 8 4 . 1 6 2 v 4 0 3 . 9 6 0 4 . 0 0 4 . 0 4 0 3 . 9 4 0 4 . 0 6 0 v 3 9 3 . 8 6 1 3 . 9 0 0 3 . 9 3 9 3 . 8 4 1 3 . 9 5 9 v 3 8 3 . 7 6 2 3 . 8 0 0 3 . 8 3 8 3 . 7 4 3 3 . 8 5 7 v 3 7 3 . 6 6 3 3 . 7 0 0 3 . 7 3 7 3 . 6 4 4 3 . 7 5 6 v 3 6 3 . 5 6 4 3 . 6 0 0 3 . 6 3 6 3 . 5 4 6 3 . 6 5 4 v 3 5 3 . 4 6 5 3 . 5 0 0 3 . 5 3 5 3 . 4 4 7 3 . 5 5 3 v 3 4 3 . 3 6 6 3 . 4 0 0 3 . 4 3 4 3 . 3 4 9 3 . 4 5 1 v 3 3 3 . 2 6 7 3 . 3 0 0 3 . 3 3 3 3 . 2 5 0 3 . 3 5 0 v 3 2 3 . 1 6 8 3 . 2 0 0 3 . 2 3 2 3 . 1 5 2 3 . 2 4 8 v 3 1 3 . 0 4 9 3 . 0 8 0 3 . 1 1 1 3 . 0 3 3 3 . 1 2 7 v 3 0 2 . 9 7 0 3 . 0 0 0 3 . 0 3 0 2 . 9 5 5 3 . 0 4 5 v 2 9 2 . 9 0 1 2 . 9 3 0 2 . 9 5 9 2 . 8 8 6 2 . 9 7 4 v 2 8 2 . 7 7 2 2 . 8 0 0 2 . 8 2 8 2 . 7 5 8 2 . 8 4 2 v 2 7 2 . 6 7 3 2 . 7 0 0 2 . 7 2 7 2 . 6 5 9 2 . 7 4 1 v 2 6 2 . 6 0 4 2 . 6 3 0 2 . 6 5 6 2 . 5 9 0 2 . 6 7 0 v 2 5 2 . 4 7 5 2 . 5 0 0 2 . 5 2 5 2 . 4 6 2 2 . 5 3 8 v
d a t a s h e e t a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 r e v . 0 | p a g e 1 3 o f 1 6 t a b l e 1 0 . s t a n d a r d m o d e l s m o d e l r e s e t t h r e s h o l d ( v ) m i n i m u m r e s e t t i m e o u t ( m s ) t y p i c a l w a t c h d o g t i m e o u t ( s e c ) a d m 8 3 1 6 w b x 3 0 a r j z r 7 3 2 0 0 . 1 0 2 a d m 8 3 1 6 w b x 4 6 a r j z r 7 4 . 6 3 2 0 0 . 1 0 2 a d m 8 3 1 8 w c y 4 6 a r j z r 7 4 . 6 3 1 4 0 1 . 6 a d m 8 3 1 9 w b 3 1 a r j z r 7 3 . 0 8 2 0 n o t a p p l i c a b l e a d m 8 3 2 0 w c y 2 9 a r j z r 7 2 . 9 3 1 4 0 1 . 6 a d m 8 3 2 1 w a y 3 0 a r j z r 7 3 1 1 . 6 a d m 8 3 2 1 w c y 4 6 a r j z r 7 4 . 6 3 1 4 0 1 . 6 a d m 8 3 2 2 w c 4 6 a r j z r 7 4 . 6 3 1 4 0 n o t a p p l i c a b l e
a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 d a t a s h e e t r e v . 0 | p a g e 1 4 o f 1 6 o u t l i n e d i m e n s i o n s f i g u r e 2 5 . 5 - l e a d s m a l l o u t l i n e t r a n s i s t o r p a c k a g e [ s o t - 2 3 ] ( r j - 5 ) d i m e n s i o n s s h o w n i n m i l l i m e t e r s f i g u r e 2 6 . o r d e r i n g c o d e s t r u c t u r e o r d e r i n g g u i d e m o d e l 1 , 2 , 3 , 4 t e m p e r a t u r e r a n g e o r d e r i n g q u a n t i t y 5 p a c k a g e d e s c r i p t i o n p a c k a g e o p t i o n b r a n d i n g a d m 8 3 1 6 w x x x x a r j z r 7  4 0 c t o + 1 2 5 c 3 , 0 0 0 5 - l e a d s o t - 2 3 r j - 5 l m t a d m 8 3 1 8 w x x x x a r j z r 7  4 0 c t o + 1 2 5 c 3 , 0 0 0 5 - l e a d s o t - 2 3 r j - 5 l m w a d m 8 3 1 9 w x x x a r j z r 7  4 0 c t o + 1 2 5 c 3 , 0 0 0 5 - l e a d s o t - 2 3 r j - 5 l m v a d m 8 3 2 0 w x x x x a r j z r 7  4 0 c t o + 1 2 5 c 3 , 0 0 0 5 - l e a d s o t - 2 3 r j - 5 l m x a d m 8 3 2 1 w x x x x a r j z r 7  4 0 c t o + 1 2 5 c 3 , 0 0 0 5 - l e a d s o t - 2 3 r j - 5 l m y a d m 8 3 2 2 w x x x a r j z r 7  4 0 c t o + 1 2 5 c 3 , 0 0 0 5 - l e a d s o t - 2 3 r j - 5 l m z 1 c o m p l e t e t h e o r d e r i n g c o d e b y i n s e r t i n g t h e r e s e t t i m e o u t , w a t c h d o g t i m e o u t , a n d r e s e t t h r e s h o l d ( a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 2 0 / a d m 8 3 2 1 ) s u f f i x e s f r o m t a b l e 7 t o t a b l e 9 . n o w a t c h d o g t i m e o u t i s a v a i l a b l e f o r a d m 8 3 1 9 / a d m 8 3 2 2 . 2 c o n t a c t s a l e s f o r t h e a v a i l a b i l i t y o f n o n s t a n d a r d m o d e l s . s e e t a b l e 1 0 f o r a l i s t o f s t a n d a r d m o d e l s . 3 z = r o h s c o m p l i a n t p a r t . 4 w = q u a l i f i e d f o r a u t o m o t i v e a p p l i c a t i o n s . 5 a m i n i m u m o f 1 2 , 0 0 0 ( f o u r r e e l s ) m u s t b e o r d e r e d f o r n o n s t a n d a r d m o d e l s . c o m p l i a n t t o j e d e c s t a n d a r d s m o - 1 7 8 - a a 1 0 5 0 s e a t i n g p l a n e 1 . 9 0 b s c 0 . 9 5 b s c 0 . 6 0 b s c 51 2 3 4 3 . 0 0 2 . 9 0 2 . 8 0 3 . 0 0 2 . 8 0 2 . 6 0 1 . 7 0 1 . 6 0 1 . 5 0 1 . 3 0 1 . 1 5 0 . 9 0 0 . 1 5 m a x 0 . 0 5 m i n 1 . 4 5 m a x 0 . 9 5 m i n 0 . 2 0 m a x 0 . 0 8 m i n 0 . 5 0 m a x 0 . 3 5 m i n 0 . 5 5 0 . 4 5 0 . 3 5 1 1 - 0 1 - 2 0 1 0 - a z : r o h s c o m p l i a n t a d m 8 3 w _ _ _ _ _ _ a r j z r 7 o r d e r i n g q u a n t i t y r 7 : 3 0 0 0 - p i e c e r e e l , r o h s c o m p l i a n t p a c k a g e c o d e r j : 5 - l e a d s o t - 2 3 t e m p e r a t u r e r a n g e a : ? 4 0 c t o + 1 2 5 c r e s e t t h r e s h o l d n u m b e r ( 2 5 t o 5 0 ) w a t c h d o g t i m e o u t p e r i o d w : 6 . 3 m s ( t y p ) x : 1 0 2 m s ( t y p ) y : 1 . 6 s e c ( t y p ) z : 2 5 . 6 s e c ( t y p ) r e s e t t i m e o u t p e r i o d a : 1 m s ( m i n ) b : 2 0 m s ( m i n ) c : 1 4 0 m s ( m i n ) d : 1 1 2 0 m s ( m i n ) g e n e r i c n u m b e r ( 1 6 t o 2 2 ) w : a u t o m o t i v e q u a l 1 1 7 7 9 - 0 2 5
d a t a s h e e t a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 r e v . 0 | p a g e 1 5 o f 1 6 a u t o m o t i v e p r o d u c t s t h e a d m 8 3 1 6 w / a d m 8 3 1 8 w / a d m 8 3 1 9 w / a d m 8 3 2 0 w / a d m 8 3 2 1 w / a d m 8 3 2 2 w m o d e l s a r e a v a i l a b l e w i t h c o n t r o l l e d m a n u f a c t u r i n g t o s u p p o r t t h e q u a l i t y a n d r e l i a b i l i t y r e q u i r e m e n t s o f a u t o m o t i v e a p p l i c a t i o n s . n o t e t h a t t h e s e a u t o m o t i v e m o d e l s m a y h a v e s p e c i f i c a t i o n s t h a t d i f f e r f r o m t h e c o m m e r c i a l m o d e l s ; t h e r e f o r e , d e s i g n e r s s h o u l d r e v i e w t h e s p e c i f i c a t i o n s s e c t i o n o f t h i s d a t a s h e e t c a r e f u l l y . o n l y t h e a u t o m o t i v e g r a d e p r o d u c t s s h o w n a r e a v a i l a b l e f o r u s e i n a u t o m o t i v e a p p l i c a t i o n s . c o n t a c t y o u r l o c a l a n a l o g d e v i c e s a c c o u n t r e p r e s e n t a t i v e f o r s p e c i f i c p r o d u c t o r d e r i n g i n f o r m a t i o n a n d t o o b t a i n t h e s p e c i f i c a u t o m o t i v e r e l i a b i l i t y r e p o r t s f o r t h e s e m o d e l s .
a d m 8 3 1 6 / a d m 8 3 1 8 / a d m 8 3 1 9 / a d m 8 3 2 0 / a d m 8 3 2 1 / a d m 8 3 2 2 d a t a s h e e t r e v . 0 | p a g e 1 6 o f 1 6 n o t e s ? 2 0 1 3 a n a l o g d e v i c e s , i n c . a l l r i g h t s r e s e r v e d . t r a d e m a r k s a n d r e g i s t e r e d t r a d e m a r k s a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s . d 1 1 7 7 9 - 0 - 1 0 / 1 3 ( 0 )


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