View UL631H256TK45_7307862.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

2 45 d e c e m b e r 1 2 , 1 9 97 ul631h256 advanced information l o w v o lta g e softstore 32k x 8 nvsram descri p tion t h e ul 6 3 1 h2 5 6 h a s t w o s e p a r a t e m o d es of o p e r a t i o n : sram m o d e a n d n o n v o l at i l e m o d e . in sram m o d e, t h e m e m o r y o p e r a t es as an or d i n a r y st a t i c ra m . in n o n v o l a t i l e o p e r at i o n , d a t a i s t r a n s f e rr e d in p a r a l l e l f r o m sram t o ee p rom or f r o m eeprom t o sr a m . i n t h is m o d e sr a m fu n c t i o ns a r e d i s a b - l e d . t h e u l 6 3 1 h2 5 6 i s a f a st s t a t i c ram (45 a n d 5 5 ns), w i t h a n o n v o- l a t i l e e l e ct r i c a l l y e r a s a b l e prom (ee p rom) e l e m e n t i n c o r p o r a t ed i n e a c h s t a t i c m e m o r y c e l l . th e sram c a n b e r e a d a n d wri t t e n an u n l i m i t e d n u m b er of ti m e s, w h i l e i n d e p e n d e n t n o n v o l a t i l e d a t a r e s i - d e s i n eepro m . d a t a t r a n s f e r s f r o m t h e s ram t o t h e e eprom ( t h e s t o r e o p e r a t i o n ) , o r f r o m t h e ee p rom t o t h e sr a m ( t h e reca l l o p e r a t i o n) a r e i n i t i a t e d t h r ou g h s o f t w a r e s equ e n c e s . t h e u l 6 3 1h 2 56 c o m b i n es t h e h i gh p e r f o r m a n c e a n d e a s e o f u s e o f a f a s t sram w i th n o n v o l a t i l e d a t a i n t e gr i t y . once a s t o r e c y c l e i s i n it i a t e d, f u r t h e r i n p u t o r o u t pu t a r e d i s a b l e d u nt i l t h e c y cle i s c o m p l e t e d. b e c au s e a s eq u e n c e o f a d d r es s es is u s e d f o r s t ore i n i t i a t i o n , i t is i m p o r t a n t t h a t n o o t h e r r e a d o r w r i t e a c c e s s e s i nt e r v e n e i n the s e q u e nce o r t h e s e q u e n ce w i l l b e a b o r t e d . i n t e r n a l l y , rec a l l is a t w o s t e p p r o c e d u r e. f irst, t h e sram d a t a is cl e a r e d a n d s e c o n d , t h e n o n v o l at i l e i n f o r m at i on i s tr a n s f e rr e d i n t o t h e s r a m c e l l s. t h e reca l l o p e r a t i o n i n n o w a y a l t e rs t h e d a t a i n t h e e eprom c e l ls. th e n o n v o l a t i l e d a t a c a n b e r e c a l l e d a n u n l i m i t ed nu m b e r o f t i m e s . t h e ul 6 3 1 h2 5 6 is p i n c o m p a ti b l e wi t h s t a n d a rd s ra m s. f eat u r e s p h ig h - p e r f o r m a n c e c m o s n o n- v o l a t i l e s t a ti c r a m 3 2 7 6 8 x 8 b i ts p 4 5 a n d 5 5 ns a c c e s s t i m e s p 2 0 a n d 25 n s o u t p u t e n a b l e a c c e s s t i m e s p s o f t w a r e s t or e i n i t i a t i o n p a u t o m a t ic s t ore t i m i ng p 10 5 s t or e c y c l e s t o e eprom p 1 0 y e a r s da t a r e t e n t i o n i n e eprom p a u t o m a t i c reca l l o n p o w e r up p s of t w a r e r e c all i n it i a t i o n p u n l i m i t e d reca l l c y c l es f r om e eprom p u n l i mi t ed r e a d a n d w r i t e t o sram p w i d e v o l t a g e r a n g e: 2 .7 ... 3.6 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: 0 t o 70 c - 4 0 t o 8 5 c p cecc 9 0 0 0 0 q u a l i t y s t a n d a rd p e s d ch a r a ct e ri z a t i o n a c c o rd i n g m i l s t d 8 8 3 c m 3 0 1 5 .7-h b m (cl a s s i fic a t i o n s e e i c c o d e n u m - b e r s ) p p a ck a g e s : s o p 28 (3 3 0 m i l ) tsop 3 2 ( t y p e i) p i n c o n fi g urati o n p i n des c ri p tion si g n a l n a me sig n al d e s cr i pti o n a0 - a 1 4 a d dres s i n p uts dq 0 - dq7 d a t a i n/ o u t e c h i p en a b l e g outp u t e n a b l e w w rite en a b l e v cc po w er s u p p l y v o l t a g e vss g r o u n d a14 a12 a7 a6 a5 a4 a3 a2 a1 a0 d q 0 d q 1 d q 2 vss v c c w a 1 3 a8 a9 a11 g a 1 0 e d q 7 d q 6 d q 5 d q 4 d q 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 sop t o p v i e w 28 27 26 25 24 23 22 21 20 19 18 17 16 15 g a 1 1 a9 a8 a13 w n . c . vcc n . c . a14 a12 a7 a6 a5 a4 a3 n . c . a10 e d q 7 d q 6 d q 5 d q 4 d q 3 vss d q 2 d q 1 d q 0 a0 a1 a2 n . c . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ts o p t o p vi e w 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
2 46 d e c e m b e r 1 2 , 1 9 9 7 ul631h256 advanced information e e p r o m arr a y 5 1 2 x ( 6 4 x 8) st o r e r e c a ll s r a m a rray 5 1 2 r o ws x 64 x 8 c o l u m n s a5 a6 a7 a8 a9 a 1 1 a12 a13 d q 0 d q 1 d q 2 d q 3 d q 4 d q 5 d q 6 d q 7 c o l u mn i /o c ol u mn d e c o d e r s tor e / r eca l l c o n tr o l ro w de c o d e r v cc v ss v cc g e w a0 a 1 a 2 a3 a 4 a10 soft w are d ete c t a 0 - a 1 3 a14 i nput b u f f e r s o p er a ting m ode e w g dq0 - d q7 s t a n d b y / n o t s e l e c t ed h ** hi g h-z i n t e rn a l r e a d l h h hi g h - z r e a d l h l d a t a o u t p u t s l o w - z wr i te l l * d at a i n p u t s h i g h - z t ruth t a b le fo r s r a m o per a ti o ns b lo c k d i a gram a : s tr e s s e s gre a t er t h a n t h o s e l i s t e d u n der ?ab s o l u t e m a xim u m r a t i n gs m a y c a u s e p e rm a nen t d a m a g e t o t h e d e vic e . t h i s is a str e ss ra t i n g o nly, a n d f u n c ti o n a l o per a t i o n o f t h e d e vi c e a t c o n d i t i o n ab o v e t h o s e i n dic a t e d in t h e o per a t i ona l s e c t i o n s o f t h i s s p e c i f i c a t i o n i s n o t impli e d. e x p o s u r e t o a bs o l u t e m a x i m u m r a t i n g c o n diti o n s f o r e x t e n d e d p e riods m a y a f f e c t r e l i a bility. a b s o l u t e m a x i m u m r a t i n g s a s y m bol m i n . m a x . u n i t p o w e r s u p p l y v o l t a g e v cc -0 . 5 4 . 6 v i n p u t v o l t a ge v i -0 . 3 v cc + 0 .5 v o u tp u t v o l t a ge v o -0 . 3 v cc + 0 .5 v p o w e r dissi p a t i o n p d 1w o p e r a t i n g t em p e r a t u r e c- t ype k- t y pe t a 0 - 4 0 70 85 c c s t o r a g e t e m p e r a t u r e t s t g - 6 5 1 5 0 c c h ar a ct e ri s tics a l l v o l t a g e s a r e r e f e r en c e d t o v ss = 0 v ( g r o u n d ) . a l l c h a r a c t e ris t ics a re v a li d in t h e p o w e r s u p ply v o lt a ge r a n ge a n d in t h e o p e ra t i n g t e mp e r a t u re r a nge spe c ifi e d . d y n a m i c m e a s u r e m e n ts a r e ba s ed o n a rise a n d f all time o f 5 ns , 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 a s i n put l e v e ls o f v il = 0 v a n d v ih = 3 v . t h e t imi n g r e f e re n c e l e v e l o f all inp u t a n d o u t put s i g n a ls is 1 . 5 v , w i t h t h e e x c e p t i o n o f t h e t d i s -ti m e s a n d t en -tim e s , i n w h ich c a s e s t r a n si t i o n i s 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 . * h o r l
2 4 7 d e c e m b e r 1 2 , 1 9 97 ul631h256 advanced information b : i c c 1 a nd i c c 3 a r e d e p e n de n t o n o u tp u t l o a di n g a n d c y c le r a t e . t h e sp e ci f i e d v a lu e s a re o bt a in e d with o u tp u ts u n l o ad e d t h e c u r r e n t i c c 1 i s m e a s u r e d f o r w r it e / r e a d - r a t i o o f 1/ 2 . c : i c c 2 i s t h e a v e r a g e c u r r e n t r e q u i r e d f o r t h e d u r a t i o n o f t h e s t o r e c yc l e ( t sto r e ). d: b ri n g i n g e 3 v ih wil l n o t p r o d u c e s t a n d b y c u rr e n t l e v els u n ti l a n y n o n v o l a tile c y c l e in p r o gr e ss h a s t im e d o u t . t h e c u r r e n t i c c (s b )1 i s m e as u r e d f o r w r i t e / r e a d - r a t i o o f 1 / 2 . dc c h ar a ct e ri s tics sy m bol c o n d itio n s c - t ype k- t y p e u n it m i n . m a x . m i n . m a x . op e r a t i n g s u p p l y curr e nt b i c c 1 v cc v il v ih t c t c = 3 .6 v = 0 .8 v = 2 .2 v = 4 5 ns = 5 5 ns 3 5 3 0 3 7 3 2 ma ma a v e r a g e su p p l y cur r e n t d ur i n g s t o r e c i c c 2 v cc e w v il v ih = 3 .6 v 3 v cc -0 . 2 v 3 v cc -0 . 2 v 0 . 2 v 3 v cc -0 . 2 v 3 4 m a a v e r a g e su p p l y cur r e n t at t cr = 20 0 ns b ( c y c l i n g c mo s in p u t l e v e l s ) i c c 3 v cc w v il v ih = 3 . 6 v 3 v cc -0 . 2 v 0 . 2 v 3 v cc -0 . 2 v 10 1 1 m a s t a n d b y s u p p l y curr e nt d (c y c l i n g t t l i n p u t l e v e l s ) i c c (sb)1 v cc e t c t c = 3 .6 v 3 v ih = 4 5 ns = 5 5 ns 9 8 1 0 9 ma ma st a n d b y s u p p l y cur e nt d (st a b l e c m os i n p u t l e v e l s ) i cc(sb) v cc e v il v ih = 3 .6 v 3 v cc -0 . 2 v 0 . 2 v 3 v cc -0 . 2 v 0 . 7 0 . 7 ma r e c o m m e nd e d o p er a ting co n di t io n s s y m b o l con d iti o ns m i n . m a x . u n it p ow e r s u p p l y v o l t a g e v cc 2 . 7 3 . 6 v i n p u t l o w v o l t age v il -2 v a t pu l s e w i d th 1 0 n s p er m i t t e d - 0 .3 0 .8 v i n p u t h i g h v o l t a g e v ih 2 . 2 v cc + 0 . 3 v
2 4 8 d e c e m b e r 1 2 , 1 9 9 7 ul631h256 advanced information sr a m m e m o r y o p er a ti o n s e : p a r a m e t e r g u a r a n t e e d b u t n o t t e s t e d . f: d e v i c e i s c o n t i n u o u s l y s e l e c t e d w i t h e a n d g b o t h l o w . g : a ddre s s v a l i d p r i o r t o o r c o i n cid e n t with e tr a n siti o n l o w . h : 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 o u t p u t v o l t a g e . d c ch a ra c ter i st i cs sym b ol con d iti o ns c- t y pe k- t y pe u n it m i n . ma x . m i n . ma x . o u t p ut hi g h v o l t a ge o u t p ut l o w v ol t a g e v oh v ol v cc i oh i ol = 2 . 7 v =-2 m a = 2 ma 2 . 4 0 . 4 2 . 4 0 . 4 v v o u t p ut hi g h curr e nt o u t p u t l o w c u rr e n t i oh i ol v cc v oh v ol = 2 . 7 v = 2 . 4 v = 0 . 4 v 2 -2 2 -2 m a ma i n p u t l e a k a g e c u r r ent hi g h l o w i ih i il v cc v ih v il = 3 . 6 v = 3 . 6 v = 0 v - 1 1 -1 1 m a m a o u t p ut l e a k a g e cur r e n t high a t thr e e- s t a t e - o u t p ut l o w a t thr e e- s t a t e - o u t p ut i o h z i o l z v cc e or g v oh v ol = 3 . 6 v 3 v ih = 3 . 6 v = 0 v - 1 1 -1 1 m a m a n o . s w it c hi n g c har a ct e ri s ti c s re a d c y c le s y m b ol 4 5 55 u n it a lt. iec m i n . m a x. m in. m a x . 1 r e a d c y c l e t i m e f t av a v t cr 45 5 5 ns 2 a d d r e s s a c c e s s t i me t o d a t a v a l id g t a v q v t a( a ) 4 5 55 ns 3 c h i p en a b l e a cc e s s t i m e t o d a t a v a l i d t e l q v t a(e) 4 5 55 ns 4 o u t p u t e n a b l e a c c es s t i me t o d at a v a l id t glqv t a ( g ) 2 0 25 ns 5e h i gh to ou t p u t i n h i g h -z h t ehqz t d i s(e) 1 5 20 ns 6g hig h t o out p u t i n h i g h -z h t g h qz t d is(g) 1 5 20 ns 7e l o w t o o u t p ut in l o w - z t e l q x t en(e) 5 5 n s 8g l ow t o o u tp u t i n l o w - z t glqx t e n ( g ) 0 0 n s 9 ou t p u t h o ld t i m e a ft e r a d d r . c h a n ge g t ax q x t v ( a ) 3 3 n s 10 ch i p e n a b l e t o p o w e r a ct i v e e t eli c ch t pu 0 0 n s 1 1 ch i p dis a b l e t o p o w er s t a n d by d, e t ehi c cl t pd 4 5 55 ns
2 49 d e c e m b e r 1 2 , 1 9 97 ul631h256 advanced information r e a d cycle 1 : a i - co n trol l e d (d u ring re a d cycl e : e = g = v il , w = v ih ) f n o . s w i t ch i ng ch a ra c teri s ti c s write cycle sy m b o l 45 55 unit a l t. # 1 a lt . # 2 i e c mi n . m a x . mi n . m a x . 12 wri t e c ycle t i me t av a v t av a v t cw 45 5 5 ns 1 3 wri t e p u l se w id t h t w l w h t w(w) 30 4 0 ns 1 4 w r i t e p u l s e w i d t h s e t u p t i me t wleh t s u ( w ) 30 4 0 ns 15 a d d r e s s s e t up t i m e t a v w l t a vel t s u( a ) 0 0 n s 1 6 a d d r e s s v a l i d t o e n d o f w ri t e t a v w h t a veh t s u ( a -wh) 30 4 0 ns 17 c h ip e n a b l e s e tup t i me t e l w h t s u (e) 30 4 0 ns 1 8 c h i p e n a b l e t o e n d o f w r i te t e l e h t w(e) 30 4 0 ns 1 9 d a t a s e t u p t i m e t o e n d of write t d v w h t d veh t su(d) 15 2 0 ns 2 0 d a t a h ol d t i m e a f t e r e n d o f w r i te t w h d x t e h dx t h(d) 0 0 n s 2 1 a d d r e s s h o l d a f t e r e n d o f w rite t wh a x t eh a x t h ( a ) 0 0 n s 22 w lo w t o o u t p u t i n h i g h - z h , i t w l qz t d i s( w ) 1 5 20 ns 23 w high t o o u t p u t i n l o w-z t whqx t en( w ) 5 5 n s t di s (e) t cr t a ( e) t e n (e) t en ( g) t a ( g) t d is( g ) a d dr e ss v a l id o u t p u t d ata v alid aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa high i mped a n ce a ct i v e s t a n d b y t pd t pu 1 3 4 5 7 6 8 10 11 t a ( a) 2 t a ( a) p r e vi o u s d a t a v alid o u t p u t d a ta v a l i d t cr a ddre s s v a lid t v ( a) aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa 1 2 9 ai e g dqi o u tp u t i cc ai dqi o u tp u t r e a d cycle 2 : g -, e -c o ntr o ll e d ( d uri n g r e a d c y c le: w = v ih ) g
25 0 d e c e m b e r 1 2 , 1 9 9 7 ul631h256 advanced information aaaa a aaa a aaa a aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa a aaa a aaa a aaaa 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 l - t o h - l e v e l u n d e f i n e d h- to l - l e v e l i : i f w i s l o w and w h en e g o e s l o w , t h e o u t p u t s r e m a i n i n t h e h i g h i m p e d a n c e s t a t e. j: e or w m u s t b e > v ih d u ri n g a d dr e ss tr a n si t i o n s. write cyc l e # 1 : w - c o n troll e d j write cycle # 2 : e -c o ntr o ll e d j t h( d ) ai e w dqi i n p u t dqi o u t p u t t cw t s u (e) t h ( a) t w ( w ) t s u( d ) t di s (w) t en ( w) a ddre s s v a lid i np u t d a ta v a l i d h i g h i m p e d a n c e t s u ( a - w h) 12 16 13 19 20 23 21 t s u ( a ) t h( d ) ai e w dqi i n p u t dqi o u t p u t t cw t w ( e) t h( a ) t s u (d) a ddr e s s v al i d in p ut d a t a v a l i d t su( w ) 12 18 21 2 0 19 17 22 pr e vi o u s d a ta aaaa aaaa aaaa aaaa aaa aaa aaa aaa 15 14 high i mp e d a n ce 15 t su ( a) 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 aaa aaa aaa aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa aaa aaa aaa 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 a a a
25 1 d e c e m b e r 1 2 , 1 9 97 ul631h256 advanced information n o n v o la t i l e m e m o ry o p e r a t i o n s k: t r e s to r e s t a rt s f r o m t h e t i m e v cc ris e s a b o v e v s w it c h . s t o r e c y c l e i nh i b it a n d a ut o m a tic p o we r up rec a l l s o f t w a r e m o de s el e c t i o n l: t h e s i x c o n s e c u t i v e a ddr e s s e s m u s t be i n o rde r list e d . w m u s t be h i g h duri n g a l l s i x c o n s e c u t ive c ycl e s . s e e s to r e c y c l e a n d r e c a l l c y cle t a bl e s a n d di a gr a ms f o r f u r t h e r d e t a ils. t h e f oll o wi n g s i x - a d d r e ss s e q u e n c e i s u s e d f o r t e sti n g p u rpo s e s a n d s h o u l d n o t b e u s e d : 0 e 3 8 , 3 1 c 7 , 0 3 e 0 , 3 c 1 f , 3 0 3 f , 3 3 9 c . m : w h i l e t h e r e a r e 1 5 a d d r e s s e s o n t h e u l 6 3 1 h 2 5 6 , o n l y t h e l o w e r 1 4 a r e u s e d t o c o n t r o l s o f t w a r e m o d e s . no. s t ore c y cle i n h i b i t a n d aut o m a tic p o w er u p rec a l l s y m b ol m i n . m a x . un i t alt. iec 2 4 p o w e r u p reca l l dur a t i o n k t restore 6 5 0 m s l o w v o l t a g e t r i g g e r l e v e l v s w it c h 2 . 4 2 .7 v e w a 1 3 - a0 ( he x ) m o d e i / o p o w er n o t e s l h 0 e 3 8 3 1 c7 0 3 e0 3 c 1f 3 0 3f 0 fc0 r e a d sram r e a d sram r e a d sram r e a d sram r e a d sram n o n v o l a t i l e s t o r e o u t p ut d a t a o u t p ut d a t a o u t p ut d a t a o u t p ut d a t a o u t p ut d a t a o u t p ut hi g h z a c t i v e i c c 2 l, m l, m l, m l, m l, m l, m l h 0 e 3 8 3 1 c7 0 3 e0 3 c 1f 3 0 3f 0 c 63 r e a d sram r e a d sram r e a d sram r e a d sram r e a d sram n o n v o l a t i l e reca l l o u t p ut d a t a o u t p ut d a t a o u t p ut d a t a o u t p ut d a t a o u t p ut d a t a o u t p ut hi g h z a c t i v e l, m l, m l, m l, m l, m l, m v cc 3 . 0 v s t ore i n h i b i t p o w e r up v sw i t c h t r e s t o r e re c a l l 24 t a a aa a a aaa a a aaa a a aaa a a aaa a aa aa a a aa a a aa a a aaa a a aaa a a aaa a a aaa a aa aa a a aa a a aa aa a aaa a a aaa a a aa
25 2 d e c e m b e r 1 2 , 1 9 9 7 ul631h256 advanced information n : t h e s o f t w a r e s e q u e n c e i s c l o c k e d w i t h e c o n t r o ll e d r e a ds o : o n c e t h e s o f t w a re c o n tr o ll e d s to r e o r r e c a l l c y cle is ini t ia t e d , it c o mpl e t e s a u t o m a ti c ally , ig n o ring all inp u t s . p : n o t e t h a t s t o r e c y c l e s ( b u t n o t r e c a ll ) a re a b o r t e d b y v cc < v s w it c h ( s t o re i n h i b i t ) . q : a n a u t o m a t i c r e c a l l a lso t a k e s pla c e a t p o w e r up, s t a r t i n g w h e n v cc e x c e e ds v s w i tch a n d t a k e s t re s to r e . v cc m us t n o t d r o p b e l ow v s w it c h o n c e i t h a s b e e n e x c e e d e d f o r t h e r e c a l l t o f u n cti o n pr o p e r l y. r : n o i s e o n t h e e p i n m a y t r i g g e r m u l t i p l e r e a d c y c l e s f r o m t h e s a m e a d d r e s s a n d a b o rt t h e a d d r e s s s e q u e n c e . s: i f t h e c h i p e n a b le p u lse w idth is l e ss t h a n t a (e) ( s e e r e a d c y c l e ) b u t g r e a t e r t h a n o r e q u a l t w ( e) s r , t h a n t h e d a t a m a y n o t be v a li d a t t h e e nd o f t h e low p u ls e , h o w e v e r t h e s t o re o r r e c a l l will stil l be i n i t i a t e d . no. soft w a re contr o ll e d s t o re / rec a ll cycle l , n s y m b ol 45 5 5 unit a l t . i e c mi n . m a x . mi n . m a x . 2 5 s t ore/rec a l l i n i t i a t i o n t i m e t av a v t cr 45 55 n s 2 6 ch i p e n a b l e t o o u t p ut i n acti v e o t elqz t dis(e)sr 600 6 00 n s 2 7 s t ore c y c l e t i m e p t e l q x s t d (e)s 10 1 0 m s 2 8 reca l l c y c l e t i m e q t elq x r t d (e)r 20 2 0 m s 2 9 ad d r e ss s e t u p t o ch i p e n a b l e r t a v e l n t s u( a ) s r 0 0 n s 3 0 c h i p e n a b l e p u l s e w i d t h r, s t e l e h n t w(e)sr 30 40 n s 3 1 ch i p d is a b l e t o a d d r e ss c h a n ge r t eh a x n t h ( a )sr 0 0 n s t: w m u st be h i gh w h e n e is l o w d u rin g t h e a d d r e s s s e q uen c e i n ord e r t o ini t i a t e a n o n v o l a tile c ycl e . g m a y b e e i the r h i g h o r l o w t h r o u g h o u t . a d dr e s s e s 1 t h r o u gh 6 a r e f o u n d in t h e m o d e s e l e c t i o n t a bl e . a d dr e ss 6 de t e rmin e s w h e t er t h e u l 6 3 1 h 2 5 6 per f o r m s a s t o r e o r r e c a l l . u : e m u s t b e u s e d t o c l o c k i n t h e a ddre s s s e q uen c e f o r t h e s o f t w a r e c o n t r o l l e d s t o r e a n d r e c a l l c y c l e s . s o f t w a r e c o nt r o l l e d s t ore/rec a l l cycle t, u (e = h igh a ft e r s t o r e i nit i ati o n) 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 aaa aaa aaa aaa ai e dqi o u t put t cr t w (e ) sr high i mped a n c e a d dr e s s 1 v a l i d v a l i d a dd r e s s 6 t d( e )s / t d ( e)r 27 2 8 / 25 t h ( a) s r 31 30 t su( a ) s r 29 t d is( e )sr 26 t h ( a) s r 31 t s u( a ) s r 29 s o f t w a r e c o nt r o l l e d s t ore/rec a l l cycle r , s , t, u (e = l o w aft e r s t o r e in i tia t io n ) 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 ai e dqi o u tp u t t cr t w (e) s r a d dr e s s 1 v a l i d v a l i d a d dr e s s 6 t cr t d(e ) s / t d( e )r 27 2 8 / 25 25 t h( a ) s r 31 30 t s u( a ) s r 29 t di s (e) s r 26 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 high i mp e d a n c e aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa
25 3 d e c e m b e r 1 2 , 1 9 97 ul631h256 advanced information a l l pi n s n o t u n der t e st m u st be c o n n e c t ed with g r o u n d b y c a p a c i t o r s . c a p a c i ta n ce e c o nd i tio n s 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 v i f t a = 3 . 0 v = v ss = 1 m h z = 2 5 c c i 8 p f o u t p ut c a p a c i t a n ce c o 7 p f 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 w 1 . 1 k 950 30 pf v v o s i m u l t a neous m e as u r e- m e n t of al l 8 out put p i ns i n put l e v e l ac c o r d i ng t o t he r e l e v ant t e s t m eas ur e m e n t d q 0 d q 1 d q 2 d q 3 d q 4 d q 5 d q 6 d q 7 v : i n m e a s u r e m e n t of t d i s - t i m e s a n d t en -ti m e s t h e c a pa c i t a n c e i s 5 p f . w : b e t w e e n v cc a n d v ss m u s t b e c o n n e c t e d a h i g h f r e q u e n c y b y p a s s c a p a c i t o r 0 . 1 m f t o a v o i d dis t u r b a n c e s. a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 a 1 0 a 1 1 a 1 2 e w g 3 v a13 a 1 4 i c co d e n u m b ers e x a m p le t y p e p a c k a g e a c c e s s t i me 4 5 = 4 5 n s 5 5 = 5 5 n s (on specia l reque st ) o p e rat i ng t e m per a ture r a nge c = 0 to 7 0 c k = - 4 0 to 8 5 c t h e d a t e of m a n uf a c t u r e is g i v en b y the l ast 4 d i g i t s o f t h e m a rk, t h e f i r st 2 d i g i t s i n d i c a t i ng t h e y e a r , a nd t h e l a st 2 d i g i ts t h e c a l e n d ar we e k . b e s d c l a s s b l a n k > 2 0 0 0 v x b > 1 0 0 0 v s u l 6 3 1 h 2 5 6 45 c s = s o p ( 3 3 0 m i l) t = tsop( t y p e i ) x : e s d pro t e cti o n > 2 000 v u n der de v e l o pm e n t
2 54 d e c e m b e r 1 2 , 1 9 9 7 ul631h256 advanced information device o p er a tion t h e u l 6 3 1h 2 5 6 h as t w o s e p a r a t e m o d e s of o p e r a t i o n: sram m o d e a n d n o n v o l a t i l e m o d e . t h e m e m o r y o p e- r a t e s i n sram m o d e a s a s t a n d a rd f a st s t a tic ra m . d a t a i s t r a ns f e rr e d i n n o n v o l a t i l e m o de f r o m s r a m to eeprom s h a d o w (t h e s t ore o p e r a t i o n ) o r f r o m eeprom t o sram (t h e rec a l l o p e r a t i o n ) . i n t h i s m o d e s r a m fu n cti o n s a r e d i s a b l e d . sr a m re a d t h e u l 6 3 1h 2 5 6 p e rf o r m s a read c y c l e w h e n e v e r e a n d g a r e l o w w hi l e w i s h i gh. t h e a d d r e s s s p e c i - f i e d on p i ns a 0 - a 1 4 d e t e r m i n e s w hich of t h e 3 2 7 6 8 d a t a b y t e s w i l l b e a c c e s s e d . w h e n t h e read is i n i t i a - t e d b y an a d d r e ss t r a nsit i o n , t h e o u t p u t s w i l l b e v a l i d a f t e r a de l ay o f t cr . if t h e read is i n i t i a t e d b y e or g , t h e o u t p u t s w i l l b e v a l i d a t t a (e) or at t a ( g ) , w h i c he v e r is l a t e r . t he d a ta o u t p u t s w i l l r e p e a t e d ly r e s p o n d t o a d d r e s s c h a n g e s w i t h i n t h e t cr acc e s s ti m e w i t h o u t t h e n e ed f o r t r a n s i ti o n on a n y c o ntr o l i n p u t p i n s, a nd w i l l r e m a in v a l id u n til a n ot h e r a d d r e ss ch a n g e o r u n til e or g is b r o u g h t h i gh o r w i s br o u g h t l o w . sr a m wr i te a w r i t e c y cle i s p e r f o r m e d w h e n e v er e a n d w a r e l o w . t h e a d d r e s s i n p u t s m u s t b e s t ab l e p ri o r to e n t e r i n g t h e w r i t e c y c l e a n d m us t r e m a in s t a b l e u nt i l e i th e r e o r w g o e s h i g h a t t h e e nd o f t h e c y c l e . t he d a t a o n p i n s d q 0 - 7 w ill b e w rit t en i n t o t h e m e m o r y i f it is v a l i d t s u ( d ) b ef o r e the e n d o f a w c o n t r o l l ed w rit e o r t s u ( d ) b e f o r e t h e end o f an e c o n t r o l l e d w ri t e . it i s r e c o m m e n d e d t h a t g i s k e pt h i g h d u ri n g t h e e n tire w r i t e c y cle to a v o id d a t a b u s c o n t e n t i o n on t h e c o m m o n i/o l i n e s . i f g i s l e f t l o w , i n t e r n a l c i r c u i t r y w i ll turn o f f t h e o u tp u t b u f f e r s t dis( w ) a f t e r w g o es lo w . n o ise c o n s i d er a t i o n t h e u l 6 3 1 h 2 5 6 i s a h i g h s p e e d m e m o r y a n d t h e r e f o r e m u s t h a v e a h i g h f r eq u e n c y b y p a s s c ap a c i t o r o f app r o - x i m a t e l y 0.1 m f c on n e c t ed b e t we e n v cc a n d v ss usi n g l e a d s a nd tr a c e s t h a t a r e as s h o rt as p o s s i b l e. a s w i t h a l l h i g h s p e e d c m o s ic s , n o r m a l c a r e f u l l r ou t i n g of p o w e r , g r o u nd a n d s i g n a l s w i l l h e lp p r e v e nt n o ise p r o- b l e m s. s o f t w a r e n on v o l a tile s t ore t h e u l 6 3 1 h 2 5 6 s o f t w a r e c o n t r o l l e d s t or e c y c l e i s i n it i a t e d b y e x e c u t i ng s e q u e n t i al r e a d c y cl e s f r o m s i x s p e cific a d d r e s s l o c a t i o n s . b y r e l y i n g o n r e ad c y c l e s o n l y , t h e ul 6 3 1 h2 5 6 i m p l e m e n t s n o n v o l a t i l e o p e r a t i o n w h i l e r e m a i n i n g c o m p a t i b l e w i t h s t a n d a r d 3 2 k x 8 sra m s. d u ri n g t h e s t or e c y c l e , a n e r a s e o f t h e p r e - v i o u s n o n v o l a t i l e d a t a i s first p erf o r m e d, f o l l ow e d b y a p r o g r a m of t h e n o n v o l a t i l e e l e m e n t s. once a s t o r e c y c l e i s i n i t i a t e d, f u rt h er i n p u t s a n d o ut p u t s a r e d is a b - l ed u nt i l t h e c y cle i s c o m p l e t e d. b e c au s e a s eq u e n c e o f ad d r e s s e s i s u s ed f o r s t o r e i n i t i a t i o n , i t i s i m p o r t a n t t h a t n o o t h e r read o r wr i te a c c e s s e s in t e r v e n e in t h e s e q u e n c e o r t h e s e q u e n c e w i l l b e a b o r t e d a n d n o s t ore o r reca l l w i l l t a k e p l a c e. t o i n it i a t e t h e s t ore c y c l e t h e f o l l ow i n g re a d s e q u e n c e m us t b e p e r f o r m e d : 1 . r e ad a d d r e s s e s 0e 3 8 ( h e x ) v a l i d r e a d 2 . r e a d ad d r e s s e s 3 1 c 7 ( h e x ) v a l i d r e a d 3 . r e a d ad d r e s s e s 0 3 e 0 ( h e x ) v a l i d r e a d 4 . r e a d ad d r e s s e s 3 c 1 f ( h e x ) v a l i d r e a d 5 . r e a d ad d r e s s e s 3 0 3 f ( h e x ) v a l i d r e a d 6 . r e ad a d d r e s s e s 0fc 0 ( h e x ) in i t i a t e s t o re c y c l e o n c e t h e s i x t h a d d r ess i n t h e s eq u e n c e h a s b e en e n t e r e d , t h e s t o r e c y c l e w i l l c o m me n c e a n d t h e c h ip w i l l b e d i s ab l e d . i t i s im p o r t an t t h a t r e a d c y c l e s a n d n ot w rit e c y c l es b e u s e d i n t h e s e q u e n c e , a l t h o u g h i t i s n o t n e c e s s a r y t h a t g b e l o w for t h e s e q u e n ce t o b e v a li d . a f t e r t h e t store c y c l e t i m e h a s b e e n f u l f i l l e d , t h e s ram w i l l a g a i n b e a cti v a t ed f o r read a n d wr i te o p e r a t i o n . s o f t w a re n o n v o l a til e rec a ll a reca l l c y c l e o f t h e eeprom d a t a i n t o t h e sram i s i n i t i a t e d w i t h a s e q u e n c e o f read o p e r a t i o n s i n a m a n n e r s i m i l a r t o t h e s t or e i n i t i a t i o n . t o i n i t i a t e t h e r eca l l c y c l e t h e f o l l ow i n g s e q u e n c e of read o p e r a - t i o ns m us t b e p e r f o r m e d : 1 . r e ad a d d r e s s e s 0e 3 8 ( h e x ) v a l i d r e a d 2 . r e a d ad d r e s s e s 3 1 c 7 ( h e x ) v a l i d r e a d 3 . r e a d ad d r e s s e s 0 3 e 0 ( h e x ) v a l i d r e a d 4 . r e a d ad d r e s s e s 3 c 1 f ( h e x ) v a l i d r e a d 5 . r e a d ad d r e s s e s 3 0 3 f ( h e x ) v a l i d r e a d 6 . r e a d a d d r e s s e s 0c 6 3 ( h e x ) i n i t i a t e rec a l l c y c l e i n t e r n a l l y , r e call is a t w o st e p p r o c e d u r e . fi r st, t h e s r a m d a t a i s c l e a r ed a n d s e c on d , t h e n o n v o l a t i le i n f o r ma t i o n i s t r an s f e r r e d i n t o t h e s r a m c e l l s . t he r eca l l o p e r a t i o n i n n o way a l t ers t h e d a t a i n t h e e eprom c e l l s . t h e n o n v o l a t i l e d a t a c a n b e r e c a l l e d a n u n l i m i t e d n u mb e r o f t i me s . a u t o m a tic p o wer up re c all on p o w e r u p , o n c e v cc e x c e e d s t h e s e n se v ol t a g e o f v s w it c h , a reca l l c y c l e i s a u t o m a t i c a l l y i n i t i a t e d . t h e v o lt a g e o n t h e v cc p i n m u s t no t d r o p b e l o w v s w i t c h o n c e it h a s r i s e n a b o v e it i n o r d e r f o r t h e reca l l t o o p e r a t e p r o p e rly. d u e t o t h i s a u t o m a tic r e cal l ,
2 55 d e c e m b e r 1 2 , 1 9 97 ul631h256 advanced information s r am o p e r at i on c a n n o t c o m m e nce u n til t restore a f t e r v cc e x c e e d s v swi t ch . i f t h e u l 6 3 1h 2 56 i s in a w r i t e st a t e at t h e e n d o f p o w e r u p reca l l , t h e s r a m d a t a w i l l b e c o rr u p t e d . t o h e l p a vo i d t h i s s i t u a t i on , a 1 0 k w r e s i s t or sh o u l d b e c onn e c t ed b e t w e e n w a n d v c c . ha r d w are p r o te c t i o n t h e u l 6 3 1 h 2 5 6 o f f e r s ha rd wa r e p r o t e c t i o n ag a i n s t i n a d v e r t en t s t o r e op e r a t i o n t h r o u g h v cc s e n s e . f o r v cc < v swi t ch t h e s o f t w a r e i n i t i a t e d s t or e o p e r a - t i o n w i l l b e i n h ib i t e d. l o w a ver a ge a c t i v e p o w er t h e u l 6 3 1 h 2 5 6 h a s b e e n d e s i g n e d t o d r a w s i g ni f i- c a n t l y l e s s p o w e r w h e n e is l o w ( c h ip e n a b l e d) b ut t h e c y c l e ti m e is l o n g e r t h an 5 5 ns. w h e n e is h i g h t h e c h i p c o n s u m e s o n l y s t a n d b y c u r- r e n t . t h e o v e r a l l a v e r a g e c u r r e n t d r a w n b y t h e p a r t d e p e n d s o n t h e f o l l o w i n g it e m s: 1 . c m o s o r t t l i n p u t l e v e ls 2 . t h e t i me d u r i n g w h i c h t h e c h i p i s d i s ab l e d ( e h i g h) 3 . t h e c y cle ti m e f o r a c c e s s e s ( e lo w ) 4 . t h e r a t i o o f read s t o w ri t e s 5 . t h e o p e r a t i ng t e m p e r at u r e 6 . t h e v cc l e v e l

▲Up To Search▲

Price & Availability of UL631H256TK45

	To Download UL631H256TK45 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .