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ics8624ay www.icst.com/products/hiperclocks.html rev. a may 22, 2001 1

ics8624 l ow s kew , 1- to -5 d ifferential - to -lvhstl z ero d elay b uffer preliminary g eneral d escription the ics8624 is a high performance lvhstl zero delay buffer and a member of the hiperclocks? family of high performance clocks solutions from ics. the vco operates at a frequency range of 250mhz to 500mhz. utilizing one of the outputs as feedback to the pll output frequencies up to 250mhz can be regenerated with zero delay with respect to the input. dual reference clock inputs support redundant clock or multiple reference applications. b lock d iagram p in a ssignment f eatures ? fully integrated pll ? 5 lvhstl outputs each with the ability to drive 50 ? to ground ? voh (max) = 1.2v ? 31.25mhz to 250mhz output frequency range ? spread smart? for regenerating spread spectrum clocks ? differential reference clock inputs accept any differential input signal ? differential reference clock inputs will accept single ended input signal with one of the inputs biased with a resistor network ? 31.25mhz to 250mhz input frequency range ? lvcmos / lvttl control inputs ? 3.3v core, 1.8v output operating supply voltage ? 32 lead low-profile qfp (lqfp), 7mm x 7mm x 1.4mm package body, 0.8mm package lead pitch ? 0c to 70c ambient operating temperature ? industrial temperature version available upon request 32 31 30 29 28 27 26 25 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 24 23 22 21 20 19 18 17 vddo q3 nq3 q2 nq2 q1 nq1 vddo div_sel0 div_sel1 ref_clk1 nref_clk1 ref_clk2 nref_clk2 ref_sel mr vddo q0 nq0 vee vee fb_in nfb_in vddi vddo nq4 q4 vee vee vdda pll_sel vddi 32-lead lqfp y package top view q0 nq0 q1 nq1 q2 nq2 q3 nq3 q4 nq4 ics8624 div_sel0 div_sel1 ref_clk1 nref_clk1 ref_clk2 nref_clk2 ref_sel fb_in nfb_in pll_sel mr 0 1 0 1 pll 1 2 4 8 hiperclocks? the preliminary information presented herein represents a product in prototyping or pre-production. the noted characteristics a re based on initial product characterization. integrated circuit systems, incorporated (ics) reserves the right to change any circuitry or specific ations without notice.
ics8624ay www.icst.com/products/hiperclocks.html rev. a may 22, 2001 2

ics8624 l ow s kew , 1- to -5 d ifferential - to -lvhstl z ero d elay b uffer preliminary t able 1. p in d escriptions r e b m u ne m a ne p y tn o i t p i r c s e d 10 l e s _ v i dt u p n in w o d l l u p . 3 e l b a t n i d e t o n e g n a r y c n e u q e r f t u p t u o d n a t u p n i e h t s e n i m r e t e d . s l e v e l e c a f r e t n i l t t v l / s o m c v l 21 l e s _ v i dt u p n in w o d l l u p . 3 e l b a t n i d e t o n e g n a r y c n e u q e r f t u p t u o d n a t u p n i e h t s e n i m r e t e d . s l e v e l e c a f r e t n i l t t v l / s o m c v l 31 k l c _ f e rt u p n in w o d l l u p. t u p n i k c o l c l a i t n e r e f f i d g n i t r e v n i - n o n 41 k l c _ f e r nt u p n ip u l l u p. t u p n i k c o l c l a i t n e r e f f i d g n i t r e v n i 52 k l c _ f e rt u p n in w o d l l u p. t u p n i k c o l c l a i t n e r e f f i d g n i t r e v n i - n o n 62 k l c _ 2 e r nt u p n ip u l l u p. t u p n i k c o l c l a i t n e r e f f i d g n i t r e v n i 7l e s _ f e rt u p n in w o d l l u p r o 2 k l c _ f e r s t c e l e s w o l n e h w . t u p n i t c e l e s k c o l c l a i t n e r e f f i d . 1 k l c _ f e r n r o 1 k l c _ f e r s t c e l e s h g i h n e h w . 2 k l c _ f e r n 8r mt u p n in w o d l l u p . s t u p t u o e h t f o e t a t s e n i m r e t e d d n a s r e d i v i d s t e s e r . s l e v e l e c a f r e t n i l t t v l / s o m c v l 9i d d vr e w o p. v 3 . 3 o t t c e n n o c . n i p y l p p u s r e w o p e r o c d n a t u p n i 0 1n i _ b f nt u p n ip u l l u p . " y a l e d o r e z " h t i w s k c o l c g n i t a r e n e g e r r o f r o t c e t e d e s a h p o t t u p n i k c a b d e e f 1 1n i _ b ft u p n in w o d l l u p . " y a l e d o r e z " h t i w s k c o l c g n i t a r e n e g e r r o f r o t c e t e d e s a h p o t t u p n i k c a b d e e f 3 1 , 2 1 9 2 , 8 2 e e vr e w o p. d n u o r g o t t c e n n o c . s n i p d n u o r g 5 1 , 4 1 , 0 q n 0 q t u p t u o 0 5 . s t u p t u o k c o l c l a i t n e r e f f i d ? . e c n a d e p m i t u p t u o l a c i p y t . s l e v e l e c a f r e t n i l t s h v l , 7 1 . 6 1 5 2 , 4 2 o d d vr e w o p. v 8 . 1 o t t c e n n o c . s n i p y l p p u s r e w o p t u p t u o 9 1 , 8 1 , 1 q n 1 q t u p t u o 0 5 . s t u p t u o k c o l c l a i t n e r e f f i d ? . e c n a d e p m i t u p t u o l a c i p y t . s l e v e l e c a f r e t n i l t s h v l 1 2 , 0 2 , 2 q n 2 q t u p t u o 0 5 . s t u p t u o k c o l c l a i t n e r e f f i d ? . e c n a d e p m i t u p t u o l a c i p y t . s l e v e l e c a f r e t n i s o m c v l 3 2 , 2 2 , 3 q n 3 q t u p t u o 0 5 . s t u p t u o k c o l c l a i t n e r e f f i d ? . e c n a d e p m i t u p t u o l a c i p y t . s l e v e l e c a f r e t n i l t s h v l 7 2 , 6 2 , 4 q n 4 q t u p t u o 0 5 . s t u p t u o k c o l c l a i t n e r e f f i d ? . e c n a d e p m i t u p t u o l a c i p y t . s l e v e l e c a f r e t n i l t s h v l 0 3a d d vr e w o p. v 3 . 3 o t t c e n n o c . n i p y l p p u s r e w o p l l p 1 3l e s _ l l pt u p n ip u l l u p e h t o t t u p n i e h t s a k c o l c e c n e r e f e r e h t d n a l l p e h t n e e w t e b s t c e l e s . k c o l c e c n e r e f e r s t c e l e s , w o l n e h w . l l p s t c e l e s , h g i h n e h w . s r e d i v i d . s l e v e l e c a f r e t n i l t t v l / s o m c v l 2 3i d d vr e w o p. v 3 . 3 o t t c e n n o c . n i p y l p p u s r e w o p e r o c d n a t u p n i . s e u l a v l a c i p y t r o f , s c i t s i r e t c r a h c n i p , 2 e l b a t e e s . s r o t s i s e r t u p n i l a n r e t n i o t s r e f e r n w o d l l u p d n a p u l l u p : 1 e t o n
ics8624ay www.icst.com/products/hiperclocks.html rev. a may 22, 2001 3

ics8624 l ow s kew , 1- to -5 d ifferential - to -lvhstl z ero d elay b uffer preliminary t able 2. p in c haracteristics t able 3. c ontrol i nputs f unction t able 1 l e s _ v i d0 l e s _ v i de u l a v e d i v i d ) z h m ( y c n e u q e r f t u p t u o / t u p n i m u n i n i mm u m i x a m 002 5 2 15 2 2 014 5 . 2 65 2 1 10 8 5 2 . 1 35 . 2 6 11 6 15 2 6 . 5 15 2 . 1 3 t able 4. pll i nput r eference c haracteristics , vddi=vdda=3.3v5%, vddo=1.8v10%, t a =0 c to 70 c l o b m y sr e t e m a r a ps n o i t i d n o c t s e tm u m i n i ml a c i p y tm u m i x a ms t i n u f e r fy c n e u q e r f e c n e r e f e r t u p n i0 20 5 2z h m r te m i t e s i r t u p n is t n i o p % 0 8 o t % 0 2 t a d e r u s a e md b ts n f te m i t l l a f t u p n it n i o p % 0 8 o t % 0 2 t a d e r u s a e md b ts n c d te l c y c y t u d e c n e r e f e r t u p n id b td b t% l o b m y sr e t e m a r a ps n o i t i d n o c t s e tm u m i n i ml a c i p y tm u m i x a ms t i n u n i c t u p n i e c n a t i c a p a c , 1 k l c _ f e r , 1 k l c _ f e r n , 2 k l c _ f e r , 2 k l c _ f e r n n i _ b f n , n i _ b f d b tf p , 0 l e s _ v i d , 1 l e s _ v i d , l e s _ f e r r m , l e s _ l l p d b tf p p u l l u p r t u p n i r o t s i s e r p u l l u p 1 5k ? n w o d l l u p r t u p n i r o t s i s e r n w o d l l u p 1 5k ?
ics8624ay www.icst.com/products/hiperclocks.html rev. a may 22, 2001 4

ics8624 l ow s kew , 1- to -5 d ifferential - to -lvhstl z ero d elay b uffer preliminary t able 5d. p ower s upply dc c haracteristics , vddi=vdda=3.3v5%, vddo=1.8v10%, t a =0 c to 70 c l o b m y sr e t e m a r a ps n o i t i d n o c t s e tm u m i n i ml a c i p y tm u m i x a ms t i n u i d d ve g a t l o v y l p p u s r e w o p t u p n i 5 3 1 . 33 . 35 6 4 . 3v a d d ve g a t l o v y l p p u s r e w o p g o l a n a 5 3 1 . 33 . 35 6 4 . 3v o d d ve g a t l o v y l p p u s r e w o p t u p t u o 6 . 18 . 10 . 2v e e it n e r r u c y l p p u s r e w o p a m a bsolute m aximum r atings supply voltage, v ddx 4.6v inputs, v i -0.5v to v dd + 0.5v outputs, v o -0.5v to v ddo + 0.5v package thermal impedance, ja 46 c/w storage temperature, t stg -65 c to 150 c stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these ratings are stress specifications only and functional operation of product at these condition or any conditions beyond those listed in the dc characteristics or ac characteristics is not implied. exposure to absolute maximum rating conditions for extended periods may affect product reliability. t able 5a. lvcmos dc c haracteristics , vddi=vdda=3.3v5%, vddo=1.8v10%, t a =0 c to 70 c l o b m y sr e t e m a r a ps n o i t i d n o c t s e tm u m i n i ml a c i p y tm u m i x a ms t i n u h i ve g a t l o v h g i h t u p n i , 1 l e s _ v i d , 0 l e s _ v i d r m , l e s _ l l p , l e s _ f e r 25 6 7 . 3v l i ve g a t l o v w o l t u p n i , 1 l e s _ v i d , 0 l e s _ v i d r m , l e s _ l l p , l e s _ f e r 3 . 0 -8 . 0v h i it n e r r u c h g i h t u p n i , 1 l e s , 0 l e s r m , l e s _ f e r v 5 6 4 . 3 = n i v0 5 1a l e s _ l l pv 5 6 4 . 3 = n i v5a l i it n e r r u c w o l t u p n i , 1 l e s , 0 l e s r m , l e s _ f e r v 0 = n i v5 -a l e s _ l l pv 0 = n i v0 5 1 -a t able 5b. d ifferential dc c haracteristics , vddi=vdda=3.3v5%, vddo=1.8v10%, t a =0 c to 70 c l o b m y sr e t e m a r a ps n o i t i d n o c t s e tm u m i n i ml a c i p y tm u m i x a ms t i n u h i it n e r r u c h g i h t u p n i , 2 k l c _ f e r , 1 k l c _ f e r n i _ b f v 5 6 4 . 3 = n i v0 5 1a , 2 k l c _ f e r n , 1 k l c _ f e r n n i _ b f n v 5 6 4 . 3 = n i v5a l i it n e r r u c w o l t u p n i , 2 k l c _ f e r , 1 k l c _ f e r n i _ b f v 0 = n i v5 -a n i _ b f n , 2 f e r n , 1 f e r nv 0 = n i v0 5 1 -a s c i t s i r e t c a r a h c c a n i r m c v d n a p p v e e s , s l e v e l t u p n i 2 k l c _ f e r n , 2 k l c _ f e r d n a 1 k l c _ f e r n , 1 k l c _ f e r r o f : e t o n . e l b a t
ics8624ay www.icst.com/products/hiperclocks.html rev. a may 22, 2001 5

ics8624 l ow s kew , 1- to -5 d ifferential - to -lvhstl z ero d elay b uffer preliminary t able 6. ac c haracteristics , vddi=vdda=3.3v5%, vddo=1.8v10%, t a =0 c to 70 c t able 5c. lvhstl dc c haracteristics , vddi=vdda=3.3v5%, vddo=1.8v10%, t a =0 c to 70 c l o b m y sr e t e m a r a ps n o i t i d n o c t s e tm u m i n i ml a c i p y tm u m i x a ms t i n u h o v1 e t o n ; e g a t l o v h g i h t u p t u o0 . 12 . 1v l o v1 e t o n ; e g a t l o v w o l t u p t u o04 . 0v x o ve g a t l o v r e v o s s o r c t u p t u o ) l o v - h o v ( x % 0 4 l o v + ) l o v - h o v ( x % 0 6 l o v + v 0 5 h t i w d e t a n i m r e t s t u p t u o : 1 e t o n ? . w m 2 3 s i r i a p t u p t u o d e t a n i m r e t a f o n o i t a p i s s i d r e w o p e h t . d n u o r g o t l o b m y sr e t e m a r a ps n o i t i d n o c t s e tm u m i n i ml a c i p y tm u m i x a ms t i n u x a m fy c n e u q e r f t u p t u o m u m i x a m 0 5 2z h m p p ve g a t l o v t u p n i k a e p - o t - k a e pz h m 0 5 2 = f r m c ve g a t l o v t u p n i e d o m n o m m o cz h m 0 5 2 = f h l p t , y a l e d n o i t a g a p o r p h g i h - o t - w o l z h m 0 , v 0 = l e s _ l l p < f z h m 0 5 2d b td b ts n l h p t , y a l e d n o i t a g a p o r p w o l - o t - h g i h z h m 0 , v 0 = l e s _ l l p < f z h m 0 5 2d b td b ts n ) ? ( t e c n e r e f e r l l p ; y a l e d o r e z 2 e t o n , 1 k l c _ f e r 1 k l c _ f e r n , 2 k l c _ f e r 2 k l c _ f e r n , d b t = f e r f , v 3 . 3 = l e s _ l l p d b t = o c v f 0 0 1 -d b t0 0 1s p ) o ( k s t3 e t o n ; w e k s t u p t u o t a e g d e g n i s i r n o d e r u s a e m 2 / o d d v 0 5s p ) c c ( t i j t4 e t o n ; r e t t i j e l c y c - o t - e l c y c t a e g d e g n i s i r n o d e r u s a e m 2 / o d d v 0 5s p l te m i t k c o l l l p d b t r te m i t e s i r t u p t u o d b td b ts p f te m i t l l a f t u p t u o d b td b ts p w p th t d i w e s l u p t u p t u o z h m 0 < f z h m 0 5 2 2 / e l c y c t d b t - 2 / e l c y c t 2 / e l c y c t d b t + s n z h m 0 5 2 = fd b td b ts n n e te m i t e l b a n e t u p t u o d b ts n s i d te m i t e l b a s i d t u p t u o d b ts n 0 5 h t i w d e t a n i m r e t s t u p t u o l l a . e s i w r e h t o d e t o n s s e l n u x a m f t a d e r u s a e m s r e t e m a r a p l l a : 1 e t o n ? . 2 / o d d v o t l a n g i s t u p n i k c a b d e e f d e g a r e v a e h t d n a k c o l c e c n e r e f e r t u p n i e h t n e e w t e b e c n e r e f f i d e m i t e h t s a d e n i f e d : 2 e t o n . e l b a t s s i y c n e u q e r f e c n e r e f e r t u p n i e h t d n a d e k c o l s i l l p e h t n e h w . s n o i t i d n o c d a o l l a u q e h t i w d n a s e g a t l o v y l p p u s e m a s e h t t a s t u p t u o f o s k n a b s s o r c a w e k s s a d e n i f e d : 3 e t o n s r i a p t n e c a j d a f o e l p m a s m o d n a r a r e v o , s e l c y c t n e c a j d a n e e w t e b l a n g i s a f o e m i t e l c y c n i n o i t a i r a v e h t s a d e n i f e d : 4 e t o n . s e l c y c f o
ics8624ay www.icst.com/products/hiperclocks.html rev. a may 22, 2001 6

ics8624 l ow s kew , 1- to -5 d ifferential - to -lvhstl z ero d elay b uffer preliminary p ackage o utline - y s uffix e e1 d1 d ccc c seating plane d2 -c- e2 e a n a1 a2 b c l 916 1 2 3 817 24 32 25 n o i t a i r a v c e d e j s r e t e m i l l i m n i s n o i s n e m i d l l a l o b m y s a b b m u m i n i ml a n i m o nm u m i x a m n 2 3 a 0 6 . 1 1 a 5 0 . 05 1 . 0 2 a 5 3 . 10 4 . 15 4 . 1 b 0 3 . 07 3 . 05 4 . 0 c 9 0 . 00 2 . 0 d c i s a b 0 0 . 9 1 d c i s a b 0 0 . 7 2 d 0 6 . 5 e c i s a b 0 0 . 9 1 e c i s a b 0 0 . 7 2 e 0 6 . 5 e c i s a b 0 8 . 0 l 5 4 . 00 6 . 05 7 . 0 0 7 c c c 0 1 . 0 t able 7. p ackage d imenisions reference document: jedec publication 95, ms-026
ics8624ay www.icst.com/products/hiperclocks.html rev. a may 22, 2001 7

ics8624 l ow s kew , 1- to -5 d ifferential - to -lvhstl z ero d elay b uffer preliminary t able 8. o rdering i nformation while the information presented herein has been checked for both accuracy and reliability, integrated circuit systems, incorpor ated (ics) assumes no responsibility for either its use or for infringement of any patents or other rights of third parties, which would result from its use. no other circuits, patents, or licenses are implied. this product is intended for use in normal commercial applications. any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by ics. ics reserves the right to change any circuitry or specifications without noti ce. ics does not authorize or warrant any ics product for use in life support devices or critical medical instruments. r e b m u n r e d r o / t r a pg n i k r a me g a k c a pt n u o ce r u t a r e p m e t y a 4 2 6 8 s c iy a 4 2 6 8 s c ip f q l d a e l 2 3y a r t r e p 0 5 2c 0 7 o t c 0 t y a 4 2 6 8 s c iy a 4 2 6 8 s c il e e r d n a e p a t n o p f q l d a e l 2 30 0 0 1c 0 7 o t c 0

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