integrated ci r cuit systems, inc. av9108 cpu frequency generator bl o ck dia g ram a v 91 0 8 re v b0 3 2195 g e neral d e scrip t ion t h e a v910 8 o f f e r s a t i n y foo t pr i n t so l ut i o n fo r g e n e r a t in g t w o si m u l t a n e ou s c l o c ks . on e c lo c k , t h e r e fc l k , i s a f ix e d ou t put fr e q u e n c y whi c h i s th e s a m e as t h e i npu t r e f e r e n c e c rys t a l ( o r c lo c k ) . t h e ot h e r c l o c k , c lk 1 , c a n v a ry b e tw e e n 2 a nd 1 2 0 mh z , w i t h up t o 1 6 se l e c t a bl e p r e pro g r a m m e d f r e qu e n c i e s sto r e d i n i n t e rn a l r om. t h e ics9 1 08 i s i d e a l for us e i n a 3 . 3 v sys t e m . it ca n g e n e r a t e a 6 6 . 6 6 mh z c l o c k a t 3 . 3 v . i n a d di t i o n , th e ics91 0 8 pro v id e s a sy m m e t ri c a l wa v e for m w i t h a wors t c as e d u ty c y c l e o f 45 / 55. t h e i cs 9 108 h a s v e r y t i gh t e d g e c o nt r o l b e t w e e n t h e c p u c lo c k a nd 2x c p u c l o c k ou t pu t s , wi t h a w o rst c as e s k ew o f 25 0 ps. t h e d e v ice h as a d v a n ced f ea t u r e s wh i c h i n c l u d e o n - c h ip l o op f i l t e r s , t r ist a t e o ut p uts , a n d p o we r - dow n ca p a b i l i t y . a m i n i - m u m of e x t e r n a l c o m po n e n ts - t wo d e c oup l i n g c a p a c i to r s a n d a n op t i o n a l f e r r i t e b e a d - a r e a l l t h a t a r e r e q ui r e d fo r j i t t e r -fr e e op e r a t io n . st a n d a r d v e rsio n s f o r c o m p ut e r m o t h e rbo a r d a p p l i - c a t i o n s a re t h e a v 9 108 - 03 , a v 9 108 - 05 a n d t he i cs 9 108 - 10 . cus t o m m a sk e d v e rsio n s , wi t h c usto m i z e d f r e q u e n c i e s a n d f e a tu r es , a r e a v a i l a bl e i n 6 -8 w e e k s f o r a s m a l l nr e f e e . f eat u res ru n s u p t o 80 mh z a t 3 . 3v 50 / 50 t yp i c a l d ut y c y c l e a t 5 v 2 5 0ps a b s o lu t e j i t t e r g e n e r a t e s f r e qu e n c i e s fro m 2 t o 1 40 mhz 2 t o 3 2 mhz i npu t r e f e r e n c e f r e q u e n c y up t o 1 6 fr e qu e n c i es sto r e d i n t e r n a l l y p a t e n t e d on - c h ip ph a s e l o c k e d l o op wi t h v c o f o r c l o c k g e n e r a t ion pro v id e s r e f e r e n c e c l o c k a n d sy n th e si z e d c lo c k on- c h i p l o op f i l t er l ow pow e r 0 . 8 m cmo s t e c hn o lo g y 8- p in o r 1 4-p i n dip or soi c p a c k a ge
pin c o n f ig u r a tion pin d e scrip t io n s f o r a v9108-03, a v9108-0 5 and a v9108-10 p i n numb e r p i n na m e ty p e d e scri p tion -0 5 / - 10 / - 13 - 0 3 1 1 4 fs0 i n put fr e qu e n c y se l e c t 0 fo r clk1 ( - 03 h a s p u l l - up ) . 5 1 fs1 i n put fr e qu e n c y se l e c t 1 fo r clk1 ( - 03 h a s p u l l - up ) . 2 fs2 i n put fr e qu e n c y se l e c t 2 fo r clk1 ( - 03 h a s p u l l - up ) . 3 fs3 i n put fr e qu e n c y se l e c t 3 fo r clk1 ( - 03 h a s p u l l - up ) . 4 agnd - ana l o g ground. 2 5 gmd - di g i t a l ground. 6 p d i n put po w er-do w n . shu t s o f f c h i p whe n l o w . i n t e rn a l p u l l - up. 3 7 x1 / iclk i n p u t c r ys t a l outp u t o r inpu t c l oc k f r e qu e nc y . t y p i c a l ly 1 4 . 31 8 m h z sy s t e m c l o c k. 4 8 x2 o u t p u t c r ys t a l out p u t ( no con n e c t wh e n c l o c k u s ed . ). 9 oe(r e fclk) i n p u t outpu t enabl e . t r i s t a t e s r e fclk wh e n lo w . pu l l-u p . 10 oe(c l k1) i n p u t outpu t enabl e . t r i s t a t e s c l k1 wh e n lo w . p u l l - u p . 6 1 1 clk1 o u t p u t clock 1 ou t p u t ( s e e de c o d i n g t a b l e s ) . 7 1 2 v d d - di g i t a l p o we r s up p l y ( +3 v dc). 8 13 refclk o u t p u t refer e nc e c l oc k o u t p u t . p r odu c e s a b u f f e r e d v e r s i o n o f th e i n p u t c loc k o r c r ys t a l f r e qu e nc y ( t yp i c a l l y 1 4 . 318 m hz ) . f s0 1 8 re f clk gnd 2 7 vdd x1/ i clk 3 6 clk1 x2 4 5 f s 1 a v9108-05 / -10 8-p i n d i p , s o i c fs1 1 14 fs0 f s2 2 1 3 re f clk fs3 3 12 vdd a g nd 4 1 1 clk1 g n d 5 1 0 o e (clk1) pd 6 9 o e (re f clk) x1/ i clk 7 8 x2 a v9108-03 / - 1 1 14-p i n di p , s o ic av9108 2
ac t ual f req u e n cies dec o d i n g t a b l e f or a v 9108-05, 14 . 318 i n pu t fs1 fs0 clk1 0 0 1 1 0 1 0 1 4 0 . 0 1 m h z 50 . 1 1 mhz 6 6 . 6 1 m h z 8 0 . 0 1 m h z dec o d i n g t a b l e f or a v 9108-03, 14 . 318 i n pu t fs3 fs2 fs1 fs0 clk1 0 0 0 1 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 6 . 0 0 mhz 3 9 . 9 9 mhz 5 0 .11 m h z 8 0 . 0 1 mhz 6 6 . 5 8 mhz 1 00 . 23 m h z 8 . 02 m h z 4 . 01 m h z 8 . 02 m h z 2 0 . 0 0 mhz 2 5 . 0 6 mhz 4 0 . 0 1 mhz 3 3 . 2 9 mhz 5 0 .11 m h z 4 . 01 m h z 2 . 05 m h z dec o d i n g t a b l e f or a v 9108-10, 14 . 318 i n pu t fs1 fs0 clk1 0 0 1 1 0 1 0 1 25 . 05 7 m hz 33 . 28 9 m hz 40 . 00 6 m hz 50 . 1 13 m h z dec o d i n g t a b l e f or a v 9108- 1 1 ( i n mh z ) f s 3 f s 2 f s 1 f s 0 clk1 0 0 0 1 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 16 . 00 m h z 33 . 39 m h z 50 . 1 1 m h z 80 . 01 m h z 66 . 58 m h z 10 0 . 2 3 mhz 60 . 00 m h z 4 . 0 1 m hz 8 . 0 2 m hz 20 . 05 m h z 25 . 06 m h z 39 . 99 m h z 33 . 25 m h z 50 . 1 1 m h z 30 . 00 m h z 4 . 0 1 m hz no t e : t h e d a s h n u m b e r f o l l owi n g i cs91 0 8 m us t b e in c l ud e d wh e n ord e r i n g p r odu c t s i n c e i t sp e c i f i e s t h e f r e q u e n c y d e c o di n g t a b l e b e i ng o r d e r e d . d e c od i ng o p t i ons c a n b e c r e a t e d by a s i m p l e m e t a l m a sk c h a ng e . av9 1 0 8 3
f r e q u en c y ac c uracy a n d cal c ula t ion t h e a c c ur a c y o f th e f r e q u e n c i e s pro d u c e d by t h e ics91 0 8 d e p e nd s o n th e i npu t fr e q u e n c y a n d t h e d es i r e d a c tu a l ou t put fr e q u e n c y . t h e fo r m u l a f or c a l c u l a t i ng t h e e x a c t f r e qu e n c y is a s f o l l ows: a ou t pu t f r e q u e n c y = i n pu t f r e q u e n c y b wh e r e a = 2 , 3 , 4 . .. 1 28 , a n d b = 2 , 3 , 4 . . . 32. for e x a m p l e , t o c a l c u l a t e t h e ac tu a l o ut p ut f r e q u e n c y for a v i d e o m on i to r e x p e c t i n g a 44 . 90 0 mh z c l o c k a n d usi n g a 14 . 3 1 8 mh z in p ut c lo c k , th e c l os e s t a/ b r a t io i s 6 9 /2 2 , wh i c h g i v es an o u t p u t of 4 4 . 9 06 m h z ( w i th in 0 . 0 2 % o f t h e t a rg e t fr e q u e n c y ) . ge n e r a l l y , th e ics9 1 08 c a n p rod u c e f r e qu e n c i e s wi t h i n 0 . 1% o f t h e d e s i r e d ou t pu t . al l o wable inpu t and out p ut f r equencies t h e i np u t fr e q u e n c y sh o ul d b e b e t we e n 2 a n d 32 mh z a nd t he a/ b r a t i o shou l d no t e x c e e d 2 4 . t h e o u tp u t s h ou l d f a l l i n t he r a ng e of 2 - 120 mh z . o u t p ut e n able t h e out p ut e n a b l e f e a t ur e t ris t a t e s t h e sp e c if i e d o u tp u t c l o c k p i ns. t h i s p l a c e s th e se l e c t e d ou t pu t p ins i n a hi g h i m p e d a n c e st a t e t o a l low f o r s y s t e m l e v e l di a g n ost i c t es t in g . po w er-do w n if e q ui p p e d , t h e pow e r -d o w n shu t s o f f th e s p e c i fi e d p l l o r e nt i r e c h ip t o s a v e c urr e n t . a f e w m i l l is e c o nds a r e r e q u ir e d t o r e a c h f ul l fun c t io n in g sp e e d fr o m a pow e r -d o wn s t a t e . f r e q u en c y t ran s itio n s a k e y ics91 0 8 f e a tu r e i s th e a b i l i ty t o p r ov i d e gl i t c h - fr e e fr e qu e n c y t r a nsi t i o ns a c r o s s i ts ou t pu t fr e q u e n c y r a ng e . t h e ics91 0 8 pr o vi d es s m oo t h tr a ns i t i on s b e t w e e n a ny of t h e tw o g r oup s of e i gh t f r e qu e n c i e s ( wh e n fs 3 = 0 o r fs3 = 1 ) , s o t h a t t h e d e v i c e w i l l swi t c h g l i t c h- f r e e b e t we e n 4 - 100 mh z a n d 2-5 0 mh z . av9108 4
a b sol u te m axim u m r a tin g s avdd , vdd r e f e r e n c e d t o gn d . . . . . . . . . . . . . . . 7v op e r a t i ng t e m p e r a t ur e und e r b i a s . . . . . . . . . . . . . . . . 0 c to + 7 0 c st o r a g e t e m p e r a t u r e . . . . . . . . . . . . . . . . . . . . . . . . . . -6 5 c t o + 1 5 0 c vo l t a g e on i / o p ins r e f e r e n c e d to g n d . . . . . . . . . . . gn d - 0 . 5v to vdd + 0 . 5v pow e r d i s s i p a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 . 5 w a t ts st r ess e s a b ov e t hos e l i st e d und e r abso l ut e ma x i m u m r a t i n g s m a y c a us e p e r m a n e n t d a m a g e t o t h e d e vi c e . t h i s i s a s t r e s s r a t i n g on l y a n d fu 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 se or a ny ot h e r c on d i t io n s a bov e th o s e in d i ca t e d in t h e op e r a t io n a l s e c t i on s o f t h e s p e c i fi c a t i on s i s no t i m p l i e d . e xposu r e to a b s o lu t e m a x i m u m r a t in g c ond i t i ons for e xt e n d e d p e r i od s m a y a f f e c t p rod u c t r e l i a bi l i t y . elec t ri c al ch a r a cteris t ics at 5v (op e r a t in g v d d = + 4 . 5 v t o + 5 . 5 v ; t a =0 c to 7 0 c un l e s s o t h e rwis e s t a t e d) dc cha r a c t e r i s t i c s p aram e ter sy m bol t es t condi t ions m in typ m a x uni t s in p u t lo w v o l t a ge v il - - 0 . 8 v in p u t hi g h v o l t a ge v ih 2 . 0 - - v in p u t l o w cur r e n t i il v i n =0 v - 6 .0 16 m a in p u t h i g h c u r r ent i ih v i n = v dd -2 . 0 - 2 . 0 m a ou t pu t lo w v o l t age v ol i o l = 1 0 ma - 0 . 1 5 0 . 40 v ou t pu t hi g h v o l t a g e , no t e 1 v oh i oh = - 30 m a 2 .4 3 . 2 5 - v ou t pu t low cu r r e n t , no t e 1 i ol v o l =0 . 8 v 22 . 0 3 5 . 0 - m a ou t pu t hi g h cur r e n t , no t e 1 i oh v oh =2 . 0 v - - 50 . 0 -3 5 .0 m a sup p l y c u r r ent i cc un l oa d , 5 0 m hz - 1 8 . 0 4 2 . 0 m a sup p l y c u r r ent i cc ( p d l ow) un l oa d , l o g i c i n pu t s 0 0 0 - 3 8 .0 100 . 0 m a sup p l y c u r r ent i cc ( p d l ow) un l oa d , l o g i c i n pu t s 1 1 1 - 1 4 . 0 4 0 . 0 m a pu l l -u p r e s i s t o r , no t e 1 r pu - 3 80 . 0 700 . 0 k o h m s ac cha r a c t e r i s t i c s ri s e t im e 0 . 8 t o 2 . 0 v , no t e 1 t r 15p f l o ad - 0 . 60 1 . 4 0 n s f a ll time 2 . 0 to 0 . 8 v , n o te 1 t f 15p f l o ad - 0 . 40 1 . 0 0 n s ri s e t im e 20 % t o 80 % , no t e 1 t r 15p f l o ad - 2 . 0 3 . 5 n s f a ll time 8 0 % to 2 0 %, n o t e 1 t f 15p f l o ad - 1 . 0 2 . 5 n s du t y cyc l e , no t e 1 d t 15p f l o a d @ 1 . 4 v 45 . 0 5 0 .0 5 5 . 0 % j i t t e r , o n e s i g m a , no t e 1 t jis fr o m 2 0 t o 1 0 0 m h z - 5 0 .0 150 . 0 p s j i t t e r , o n e s i g m a , no t e 1 t jis fr o m 1 4 t o 1 6 mhz 1 00 . 0 200 . 0 p s j i t t e r , o n e s i g m a , no t e 1 t jis f r om 14 t o b el o w 0 .2 1 .0 % j i t t e r , a b s o l u t e , no t e 1 t jab fr o m 2 0 t o 1 0 0 m h z - 25 0 .0 250 . 0 p s j i t t e r , a b s o l u t e , no t e 1 t jab fr o m 1 4 t o 1 6 mhz - 50 0 . 0 500 . 0 p s j i t t e r , a b s o l u t e , no t e 1 t jab f r om 14 t o b el o w 1 .0 3 .0 % in p u t f r e qu e nc y , no t e 1 f i 1 1 .0 1 4 . 3 1 9 .0 m h z ou t pu t fr e qu e n c y f o 2 .0 - 120 . 0 m h z pow e r - u p t i m e , no t e 1 t pu - 7 . 5 8 1 8 . 0 m s tr a n s it i on t i me, n o te 1 t ft 8 t o 6 6 .6 mh z - 6 .0 1 3 .0 ms no t e 1 : p a r a m e t e r is gu a r a n t e e d b y d e s i gn a nd c h a r a c t e r i z a t io n . no t 100 % t e st e d i n p rod u c t i o n. av9 1 0 8 5
elec t ri c al ch a r a cteris t ics at 3.3v (op e r a t in g v d d = + 3 . 0 v t o + 3 . 7 v ; t a =0 c to 7 0 c un l e s s o t h e rwis e s t a t e d) dc cha r a c t e r i s t i c s p aram e ter s ymbol te s t cond i t i ons m in typ max un i ts in p u t lo w v o l t a ge v il - - 0 . 2 0 v dd v in p u t hi g h v o l t a ge v ih 0 . 7v dd - - v in p u t l o w cur r e n t i il v i n =0 v - 2 .5 7 . 0 m a in p u t h i g h c u r r ent i ih v i n = v dd - 2 .0 - 2 . 0 m a ou t pu t lo w v o l t age v ol i o l = 6 ma - 0 . 1 5 0 . 1 v ou t pu t h i gh v o l t a ge v oh i oh = - 5 m a 0 . 8 5 0 . 9 2 - v ou t pu t lo w cu r r e n t i ol v o l =0 . 2 v dd 1 5 .0 22 .0 - ma ou t pu t hi g h cur r e n t i oh v o l =0 . 7 v dd - - 1 7 .0 - 1 0 .0 ma sup p l y c u r r ent i cc un l oa d ed , 5 0 m h z - 22 . 0 40 . 0 m a sup p l y c u r r ent i cc ( pd l ow) un l oa d , l o g i c i n pu t s 0 0 0 - 13 . 0 40 . 0 m a sup p l y c u r r ent i cc ( pd l ow) un l oa d , l o g i c i n pu t s 1 1 1 - 4 . 0 12 . 0 m a pu l l -u p r e s i s t o r r pu - 55 0 . 0 9 0 0 . 0 k oh m s ac cha r a c t e r i s t i c s ri s e t im e 20 % t o 80 % , no t e 1 t r 15p f l o ad - 2 . 2 3 .5 ns fa l l t ime 8 0 % to 2 0 % t f 15p f l o ad - 1 . 2 2 .5 ns du t y cyc l e d t 15p f l o a d @ 5 0% 4 0 . 0 46 . 0 60 . 0 % j i t t e r , o n e s i g m a t jis f r om 25 t o 85 mh z - 50 .0 1 5 0 .0 p s j i t t e r , o n e s i g m a t jis fr o m 1 4 t o 2 0 mhz 10 0 . 0 2 0 0 . 0 ps j i t t e r , o n e s i g m a t jis f r om 14 t o b el o w 0 .4 1 . 0 % j i t t e r , abs o l u t e t jab f r om 25 t o 85 mh z - 2 50 .0 2 5 0 .0 p s j i t t e r , abs o l u t e t jab f r om 14 t o 20 mh z - 5 00 .0 5 0 0 .0 p s j i t t e r , abs o l u t e t jab f r om 14 t o b el o w 1 .0 3 . 0 % in p u t f r e qu e ncy f i 1 3 . 3 14 . 3 15 . 3 mhz ou t pu t fr e qu e n c y f o 2 . 0 - 90 . 0 mhz pow e r - u p t i m e , no t e 1 t pu - 7 . 58 18 . 0 m s tr a n s it i on t i me, n o te 1 t ft 8 t o 6 6 .6 mh z - 6 .0 1 3 .0 ms par a met e r is g u a ranteed b y desi g n and cha r act e riz a tion. av9108 6
8 - pi n di p package 1 4 -p i n d i p p a c k a g e or d ering inf o r m a tion a v91 0 8-xxcn8, ics910 8 -xxcn14 e x a m p l e: x x x xxx x - xx m x#w lea d c o un t & p ac k ag e w i dth lea d co u nt= 1 , 2 or 3 d igits w=.3 soic or .6 dip; no n e=stan d ar d w idth pa c kag e t ype n=di p ( p l a stic) pa t t e rn nu m b e r ( 2 o r 3 d i g i t nu m b e r f o r pa r t s w i t h r o m c od e p at t e r n s ) dev i c e t y p e ( c on s i s t s o f 3 o r 4 d i g i t nu m b e r s ) p r e f i x ics, a v = s ta n d a rd d e vic e ; g s p=ge n lo c k d e vice av9 1 0 8 7
8 -pin pla s ti c soic 1 4 -p i n soic pa c k a g e or d ering inf o r m a tion ics91 0 8-xxcs8, i s 9 108 - x x cs14 e x a m p l e: x x x xxx x - xx m x#w lea d c o un t & p ac k ag e w i dth lea d co u nt= 1 , 2 or 3 d igits w=.3 soic or .6 dip; no n e=stan d ar d w idth pa c kag e t ype s= s oic pa t t e rn nu m b e r ( 2 o r 3 d i g i t nu m b e r f o r pa r t s w i t h r o m c od e p at t e r n s ) dev i c e t y p e ( c on s i s t s o f 3 o r 4 d i g i t nu m b e r s ) p r e f i x ics, a v = s ta n d a rd d e vic e ; g s p=ge n lo c k d e vice av9108 8
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