3 15 d e c e m b er 1 2 , 1 9 9 7 ul6264a p p a c k a g e s : p d i p2 8 ( 6 00 m il) s o p 2 8 (3 3 0 m i l) descrip t ion t h e u l 6 2 6 4 a is a s t a t i c r a m m a n u f a ctur e d u s i n g a cmos p ro- c es s t e c hn o l o g y w i t h t h e f o l l o w i ng o p e r a t i n g m o d e s : - r e ad - s t a n d by - w r i t e - d a ta r e t e n t i o n t h e me m o r y a r r a y i s b a s e d o n a 6- t r a n s i st o r c e l l . t h e c i r c u i t i s act i v a t e d b y t h e risi n g e d g e o f e2 ( a t e 1 = l ) or t h e f a l li n g e d g e o f e 1 ( a t e2 = h). t h e a d d r e s s a n d c on t r o l i n p u t s o p e n s i m u l t a n e o usly. a c c o r di n g t o t h e i n f o r m a t i on of w a n d g t h e d a t a i n p u ts, o r o u t p uts , a r e a ct i v e . i n t h e a c t i ve st a t e e 1 = l a n d e 2 = h , e a ch a d d r e s s c h a n g e l e a d s t o a n e w r e a d o r w r i t e c y c l e . i n a r e ad c y c l e , t h e d a t a o u t p uts a r e a cti v a- t e d b y t h e f a l l i n g e d g e o f g , aft e r - w a r d s t h e d a t a w o r d r e a d w i l l b e a v a i l a b l e a t t h e o ut p u t s dq 0 - dq 7 . a f t e r t h e a d d r e s s ch a n g e, t h e d a t a o ut p u t s g o hi g h-z u n t il t h e n e w r e ad i n f o r m a t i on i s a v a i l a b l e . t h e d a t a o u t p u t s h a v e n o p r e f e rr e d s t a t e . i f t h e m e m o r y i s d r i v e n b y c m os l e v e ls i n t h e a ct i v e s t a t e , a n d i f t h e r e i s n o c h a n g e of t h e a d d r e ss , d a t a i n p u t a n d c o n t r o l si g n a ls w o r g , t he o p e r a t i n g c u r - r e n t ( a t i o = 0 m a ) d r o p s t o t h e v a l u e o f t h e op e r a t i n g c u r r en t i n t h e s t a n d b y m o d e. the r e ad c y c l e i s f i n i s h ed b y t h e f a l l i n g e d g e of e2 o r w , o r b y t h e risi n g e d g e of e1 , r e s p e ct i v e l y . d a t a r e t en t i o n i s g u a r an t e e d d o w n to 2 v . w ith t h e e x c e p t i o n of e 2 , a ll i n p u t s c o n sist o f nor g a t e s , s o t h a t n o p u l l- u p/ p u ll- d o w n r e s i s t o r s a r e r e q u i r e d . th i s g a t e circ u i t a l l o w s t o a c h i e v e l o w p o w e r s t a n d b y r e q u i r e- m e n t s b y a c t i v a t i on w i t h t t l -l e v e l s t o o . if the circu i t is i n a cti v a t e d b y e2 = l , t h e s t a n d b y c u rr e n t ( t t l) d r o p s t o 1 0 0 m a t y p . fe a t u r e s p 8 1 9 2 x 8 b it st a t i c cmo s ram p 2 5 0 an d 5 0 0 n s a c c es s t i m e s p c o m mo n d a t a i n p u t s a n d da t a o ut p u t s p t h r e e -st a t e o u tp u ts p t y p . o p e r a t i n g s u p p l y curr e n t : 2 5 0 n s : 1 2 ma 5 0 0 n s : 7 ma p s t a n d b y c u r r e n t < 5 m a p s t a n d b y c u r r en t a t 25 c a n d 3 . 3 v : t y p . 5 0 na p ttl/ c mos - c o m p a t i b l e p a u t o m a tic r e d ucti o n of p o w e r d i s s i p a ti o n in l o ng r e ad o r w rite c y cl e s p p o w e r s u p p l y v o l t a g e 3 . 3 v p 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 s 0 t o 7 0 c -25 t o 8 5 c -40 t o 8 5 c p q u a l i t y a ss e ssm e nt a cc o r d i n g t o cec c 9 0 0 0 0 , cecc 9 0 1 0 0 a n d cecc 9 0 1 1 1 p esd p r o t e c t i o n > 2 0 0 0 v ( m i l s t d 8 8 3 c m 3 0 1 5 . 7) p l a tch - u p i m m u n i t y > 1 0 0 m a l o w v o l tage 8k x 8 s r a m p i n descrip t ion sig n al n a m e s i gn a l d e s cri p tion a 0 - a 1 2 addres s i n p u ts d q0 - d q 7 d a t a i n/out e1 c h i p enabl e 1 e2 c h i p enabl e 2 g o u t p u t e n a b l e w write enable v c c p o w er sup p l y volt a g e vss g rou n d n . c . n o t c o n n e ct e d pin c o n f i g u r a t i o n 1 n.c. v c c 28 2 a 1 2 w ( w e ) 27 4 a6 a 8 25 5 a5 a 9 24 3 a7 e2 (ce2 ) 26 6 a4 a 1 1 23 7 a3 g ( o e ) 22 8 a2 a 1 0 21 1 2 d q 1 d q 5 17 9 a1 e ( c e 1 ) 20 1 0 a0 dq 7 19 1 1 d q 0 dq 6 18 1 3 d q 2 d q 4 16 1 4 vss dq 3 15 pdip t op vi e w sop
3 16 d e c em b e r 1 2 , 1 9 9 7 ul6264a a ddre s s c h a n ge d e t e c t o r * h o r l o p er a ti n g m o d e e1 e2 w g dq 0 - d q7 s t an d b y / n o t s e l e ct e d * l * * h i g h - z h * * * h i g h - z i nt e r n a l r e a d l h h h h i g h - z r e a d l h h l d a ta o u t p u t s l o w - z write l h l * d a t a i n p u ts hi g h - z t ruth t ab l e a0 a1 a2 a3 a10 me m o r y c e ll ar r ay 256 r o w s x 256 c o l u m n s r o w d e c oder r o w a ddr es s i nput s c o l u m n d e c oder c o m m on d a t a - i / o s e n s e a m p li f ier/ w r i t e c o n tr o l l o g i c cl o ck gene r ator 1 d q 0 d q 1 d q 2 d q 3 d q 4 d q 5 d q 6 d q 7 m a x i m um r a tin g s sy m bol m in. m a x . unit p o w e r su p p l y v o l t a ge v cc -0 . 3 7 v i n p u t v o l t a g e v i -0 . 3 v cc + 0 . 5 v ou t p u t v o l t a g e v o -0 . 3 v cc + 0 . 5 v p o w e r dis s i p a t i o n p d 1w op e r a ti n g t e m p e r a ture c- t y p e g - t y pe k- t ype t a 0 - 2 5 - 4 0 70 85 85 c c c st o r a g e t e m p e r a t u r e t s t g - 5 5 1 25 c e2 e1 ch a ra c ter i sti c s c o l u m n addr es s i nput s v cc v ss w g b l ock d i agr a m a4 a5 a6 a7 a8 a9 a 1 1 a12 a l l v o l t a g e s a r e r e f e r e n c e d to v ss = 0 v ( g r o u n d ) . a l l c h a r a c t e r i s tics a re v a li d in t h e po w er s u p p l y v o l t age r a n ge a n d in t h e op e r a ti n g t e mp e r a t u re r a n g e sp e cifi e d . d y n a m i c m e a s u r e m e n ts a re b a s e d o n a rise a n d f a l l time o f 5 n s , m e a s u r e d b e t w e e n 1 0 % a n d 9 0 % o f v i , a s w e l l as i n p u t l e v els o f v il = 0 v a n d v ih = 3 v . t h e timi n g r e f e r e n c e l e v e l o f a l l i n p u t a n d o u tp u t sign a ls is 1 . 5 v , w i t h t h e e x c e pti o n o f t h e t dis - t im e s, in w h ich c a s e s t ra n s iti o n is m e a s u r e d 2 0 0 m v f r o m s t e a d y - s t a t e v o l t a g e.
3 17 d e c e m b er 1 2 , 1 9 9 7 ul6264a e l e c tri c al char a c t eri s ti c s sym b ol con d iti o ns m in. m a x . u n it s u p p l y c u rr e n t - op e r a ti n g m o de s u p p l y c u rr e n t - st a n d b y m o de (c m os l e v e l) s u p p l y c u rr e n t - s t a n d b y m o de (t t l l e v e l ) i c c ( o p ) i cc(sb) i cc(sb)1 v cc v il v ih t cw t cw v cc v e1 = v e2 v cc v e1 = v e2 = 3 .6 v = 0 .8 v = 2 .0 v = 5 0 0 ns = 2 5 0 ns = 3 . 6 v = v cc - 0 . 2 v = 3 . 6 v = 2 . 0 v 20 30 5 2 ( t y p . 0 . 7) ma ma m a ma o u tp u t h i g h v o l t a g e o u tp u t l ow v o l t a ge v oh v ol v cc i oh v cc i ol = 3 . 0 v = -1 . 0 m a = 3 . 0 v = 2 . 0 ma 2 . 4 0 . 4 v v i n p u t h igh l e a k a g e c u rr e nt i n p u t l o w l e a k a g e cu r r e n t i ih i il v cc v ih v cc v il = 3 . 6 v = 3 . 6 v = 3 .6 v = 0 v -1 1 m a m a o u tp u t h i g h c u r r e n t o u t p u t l ow cur r e n t i oh i ol v cc v oh v cc v ol = 3 . 0 v = 2 .4 v = 3 . 0 v = 0 . 4 v 2 . 0 -1 m a ma o u tp u t l e a k a g e c urr e nt hi g h a t thr e e - s t a t e out p u t s l o w a t t h r e e-s t a t e o u tp u ts i ohz i olz v cc v oh v cc v ol = 3 .6 v = 3 . 6 v = 3 .6 v = 0 v -1 1 m a m a re c o m m e n d ed o p e r a ti n g con d iti o ns sym b ol con d iti o ns m in. m a x. unit p o w e r s u p p l y v o l t a g e v cc 3 . 0 3 .6 v d a t a r e t e nt i on v ol t a g e v cc(d r ) 2 . 0 v i n p u t l o w v o l t age* v il -0.3 0 .8 v in p ut hi g h v o l t a ge v ih 2 . 0 v cc + 0 .3 v * -2 v a t p u lse w idth 1 0 n s
3 18 d e c em b e r 1 2 , 1 9 9 7 ul6264a s w it c hi n g c h ar a ct e ri s tics s y m b o l m i n . ma x . u n i t a l t . i e c 2 5 5 0 2 5 5 0 t i m e t o o u t p u t i n l o w - z t lz t t (q x ) 2 0 20 ns g lo w t o o u t p u t i n l o w - z t o l z t tg( q x ) 1 0 10 ns c y cle t i me wri t e c y cle t i me r e ad c y c l e t i m e t wc t rc t cw t cr 2 5 0 2 5 0 5 0 0 5 0 0 ns ns a c c e s s t im e e1 l o w o r e2 hig h t o d a t a v a l id g l o w t o d a t a v a l i d a d d r e s s to d a ta v a l i d t a c e t oe t aa t a(e) t a ( g ) t a( a ) - - - - - - 2 5 0 1 0 0 2 5 0 5 0 0 1 0 0 5 0 0 ns ns ns pu l se w i d t h s wri t e pu l se w id t h c h i p e n a b l e t o e n d o f w r i te t wp t cw t w ( w ) t w(e) 1 2 0 1 8 0 1 5 0 2 1 0 ns ns s et u p t i mes a d d r e s s s et u p t i me c h i p e n a b l e t o e n d o f w r i te wri t e pu l se w id t h d a t a s e tup t i me t as t cw t wp t ds t s u( a ) t s u (e) t su( w ) t s u ( d ) 0 1 8 0 1 2 0 80 0 2 1 0 1 5 0 1 0 0 ns ns ns ns d a t a h o ld t i me ad d r e ss h o l d t i m e f r o m e n d o f w r i t e t dh t ah t h( d ) t h ( a ) 0 0 0 0 ns ns out p u t h o l d t i m e f r o m ad d r e s s ch a n g e t oh t v ( a ) 2 0 20 ns e1 h i g h o r e 2 lo w t o o u t p u t i n h i g h -z w l o w t o ou t p u t i n hig h -z g h i gh to ou t p u t i n h i g h -z t h z c e t hz w e t h z o e t d i s( e ) t d is(w) t d is(g) 0 0 0 0 0 0 60 60 40 60 60 40 ns ns ns v c c (d r ) 3 2 v d ata r e te n tion m ode e1 -co n trol l ed data r e te n tion m ode e 2 -co n tro l l ed d a t a r e t e n ti o n 3 . 0 v t dr t rec v cc e1 v c c (d r ) 3 2 v v e2(d r ) 3 v cc( d r) - 0.2 v or v e2(d r ) 0 . 2 v v cc( d r) - 0.2 v v e1 (d r ) v c c(d r ) + 0 . 3 v 0 v d a t a r e t e n ti o n t rec t dr 0 . 8 v 0. 8 v v e 2( d r) 0 . 2 v 2 . 0 v 2 . 0 v 3 . 0 v 0 v v cc e2 c h i p d e s e l e c t t o d a t a r e t e n ti o n t i m e t dr : m i n 0 n s op e r a t i ng r e c o v e r y t i m e t r e c : m i n t cr
3 19 d e c e m b er 1 2 , 1 9 9 7 ul6264a t e st co n fig u rati o n f or f u n c tio n a l ch e ck v ih v il v ss v cc 3 . 3 v 960 510 5 p f v o si m u l t aneou s m eas ur e- m e n t of al l 8 out put p i ns i n p u t l e v e l ac c o r d i ng t o t he r e l e v a n t t e s t m e a s ur em ent l 1: f o r d y n a m ic m e a sur e m e n t e x c e p t t dis - t i m es l 2 : f o r t d i s -ti m e s i c c o d e n u m b e r s e x a m p l e t h e d a t e o f m a n u f a cture i s g i v e n b y t h e 4 l a s t d i g i t s of t h e m a r k , t h e f i r s t 2 d i gi t s i n d i c a ti n g t h e y e a r , a n d t h e l a s t 2 d i gi t s t h e c a l e n d a r w e e k . d u l 6 2 6 4a 25 g t y p e p a c k a g e d = p dip s = s o p a c c e s s t i m e 25 = 2 5 0 n s 50 = 5 0 0 ns o p e rati n g t e m p er a ture r a nge c = 0 t o 7 0 c g = - 25 t o 8 5 c k = - 4 0 t o 8 5 c all p ins n ot u n d er t est m u s t b e c o n n e c t e d w i th g r o u n d b y c a p aci t o r s. 1 0 0 p f v o qq q l1 l 2 c a p a ci t an c e c on d iti o ns sym b ol m i n . m a x . unit i n p ut c a p a c i t a n ce v cc = 3.3 v v i = v ss c i 8 p f o u tp u t c a p acit a n ce f = 1 m h z t a = 2 5 c c o 10 p f a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a 1 1 a12 e1 e2 w g d q 0 d q 1 d q 2 d q 3 d q 4 d q 5 d q 6 d q 7
32 0 d e c em b e r 1 2 , 1 9 9 7 ul6264a t h ( d) r e ad c y c l e 1 (d u ring re a d c y c le: e1 = g = v il , e 2 = w = v ih ) r e a d c y c l e 2 (d u ring re a d c y c l e : w = v ih ) write cyc l e 1 (w -c o ntro l le d ) t a ( a) p r e vi o u s d a t a v a l i d o u t put d a t a v alid t cr a ddre s s e s v a lid t v( a ) aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa aaa aaa aaa a i dq i a i e1 e2 g dq i o u t p u t o u t p u t t d i s( e ) t cr t su( a ) t a(e) t su ( a) t t ( q x ) t t( q x) t t g( q x) t a ( g) t a( e ) t d is( e ) t dis ( g) a d dr e s s e s v a lid o ut p ut d at a v a l i d aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa aaa aaa aaa a i e1 e2 w dq i i n p u t g dq i o u t p u t t cw t s u(e) t h( a ) t w( w ) t su( a ) t s u (e) t s u( d ) t d is( w ) t t( q x) a ddr e s s e s v alid i n p u t d a t a v alid hig h -z aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aa aa aa aa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa aaa aaa aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa aaa aaa aaa
32 1 d e c e m b er 1 2 , 1 9 9 7 ul6264a hig h - z in p ut d at a v a l i d t h( d ) t su( w ) t w( e ) t su ( d) t cw a d dr e s s e s v a lid t su( a ) t su( e ) t h( a ) t t( q x) t di s (w) aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aa aa aa aa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa aaa aaa aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa a i e1 e2 w dq i i np u t g dq i o u tp u t t s u ( a ) aaaa a aaa a aaa a aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa a a a a a aaaa a aaa a aaa a aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa a a a a a u n d e f i n ed l - o r h- l e v el write cyc l e 2 ( e 1 - c ontr o ll e d) write c y c l e 3 (e 2 -c o ntro l le d ) t h( d ) a i e1 e2 w dq i i n p u t g dq i o u t p u t t cw t w( e ) t h( a ) t su( w ) t su( e ) t su( d ) t d i s( w ) t t(q x ) addr e s s e s v a l i d i np u t d a t a v a l i d hig h -z aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa aaa aaa aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa
|
