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ICS8543bg www.icst.com/products/hiperclocks.html rev. c may 21, 2001 1

ICS8543 l ow s kew , 1- to -4 lvds f anout b uffer preliminary g eneral d escription the ICS8543 is a low skew, high performance 1-to-4 clock fanout buffer and a member of the hiperclocks? family of high performance clock solutions from ics. utilizing low voltage differential signaling (lvds) the ICS8543 provides a low power, low noise, solution for distributing clock signals over controlled impedances of 100 ? . the ICS8543 accepts any differential input level and translates it to 3.3v lvds output levels. guaranteed output and part-to-part skew characteristics make the ICS8543 ideal for those applications demanding well defined performance and repeatability. f eatures ? 4 lvds outputs ? designed to meet or exceed the requirements of ansi tia/eia-644 ? selectable differential hstl or lvpecl clock inputs ? lvcmos / lvttl control inputs ? 3.3v operating supply ? 20 lead tssop ? 0c to 70c ambient operating temperature b lock d iagram p in a ssignment ICS8543 20-lead tssop g package top view vee clk_en clk_sel hclk nhclk pclk npclk oe vee vdd 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 q0 nq0 vdd q1 nq1 q2 nq2 vee q3 nq3 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. oe hclk nhclk pclk npclk q0 nq0 q1 nq1 q2 nq2 q3 nq3 0 1 clk_en clk_sel nd q le
ICS8543bg www.icst.com/products/hiperclocks.html rev. c may 21, 2001 2

ICS8543 l ow s kew , 1- to -4 lvds f anout b uffer preliminary t able 2. p in c haracteristics 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 3 1 , 9 , 1e e vr e w o p. d n u o r g o t t c e n n o c . d n u o r g y l p p u s r e w o p 2n e _ k l ct u p n ip u l l u p k c o l c s w o l l o f s t u p t u o k c o l c h g i h n e h w . e l b a n e k c o l c s u o n o r h c n y s . h g i h e c r o f e r a s t u p t u o q n , w o l e c r o f e r a s t u p t u o q , w o l n e h w . t u p n i . 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 3l e s _ k l ct u p n in w o d l l u p . s t u p n i l c e p l a i t n e r e f f i d s t c e l e s h g i h n e h w . t u p n i t c e l e s k c o l c . s t u p n i l t s h l a i t n e r e f f i d s t c e l e s w o l n e h w . 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 4k l c ht u p n in w o d l l u p. t u p n i k c o l c l t s h l a i t n e r e f f i d g n i t r e v n i - n o n 5k l c h nt u p n ip u l l u p. t u p n i k c o l c l t s h l a i t n e r e f f i d g n i t r e v n i 6k l c pt u p n in w o d l l u p. t u p n i k c o l c l c e p l a i t n e r e f f i d g n i t r e v n i - n o n 7k l c p nt u p n ip u l l u p. t u p n i k c o l c l c e p l a i t n e r e f f i d g n i t r e v n i 8e ot u p n ip u l l u p 0 q n , 0 q s t u p t u o f o g n i l b a s i d d n a g n i l b a n e s l o r t n o c . e l b a n e t u p t u o 3 q n , 3 q u r h t 8 1 , 0 1d 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 2 1 , 1 13 q , 3 q nt u p t u o. s l e v e l e c a f r e t n i s d v l . s t u p t u o k c o l c l a i t n e r e f f i d 5 1 , 4 12 q , 2 q nt u p t u o. s l e v e l e c a f r e t n i s d v l . s t u p t u o k c o l c l a i t n e r e f f i d 7 1 , 6 11 q , 1 q nt u p t u o. s l e v e l e c a f r e t n i s d v l . s t u p t u o k c o l c l a i t n e r e f f i d 0 2 , 9 10 q , 0 q nt u p t u o. s l e v e l e c a f r e t n i s d v l . s t u p t u o k c o l c l a i t n e r e f f i d 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 ce c n a t i c a p a c t u p n i k l c h n , k l c h4f p k c l p n , k l c p4f p , n e _ k l c l e s _ k l c 4f p p u l l u p rr o t s i s e r p u l l u p t u p n i 1 5k ? n w o d l l u p rr o t s i s e r n w o d l l u p t u p n i 1 5k ?
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ICS8543 l ow s kew , 1- to -4 lvds f anout b uffer preliminary t able 3b. c lock i nputs f unction t able t able 3a. c ontrol i nputs f unction t able s t u p n is t u p t u o e on e _ k l cl e s _ k l c3 q u r h t 1 q3 q n u r h t 1 q n 0xx z i hz i h 10 0 w o lh g i h 10 1 w o lh g i h 110 e v i t c ae v i t c a 111 e v i t c ae v i t c a n i d e b i r c s e d s a s t u p n i k l c p n , k l c p d n a k l c h n , k l c h e h t f o n o i t c n u f a s i t u p t u o e h t f o e t a t s e h t e d o m e v i t c a e h t n i . b 3 e l b a t s t u p n is t u p t u o e d o m t u p t u o o t t u p n iy t i r a l o p k l c p , k l c hk l c p n , k l c h n3 q u r h t 0 q3 q n u r h t 0 q n 01 w o lh g i hl a i t n e r e f f i d o t l a i t n e r e f f i dg n i t r e v n i n o n 10 h g i hw o ll a i t n e r e f f i d o t l a i t n e r e f f i dg n i t r e v n i n o n 01 e t o n ; d e s a i bw o lh g i hl a i t n e r e f f i d o t d e d n e e l g n i sg n i t r e v n i n o n 11 e t o n ; d e s a i bh g i hw o ll a i t n e r e f f i d o t d e d n e e l g n i sg n i t r e v n i n o n 1 e t o n ; d e s a i b0h g i hw o ll a i t n e r e f f i d o t d e d n e e l g n i sg n i t r e v n i 1 e t o n ; d e s a i b1w o lh g i hl a i t n e r e f f i d o t d e d n e e l g n i sg n i t r e v n i e h t s t e s t u p n i d e s a i b e h t t a e g a t l o v e h t . d e s a i b e b s t u p n i l a i t n e r e f f i d e h t f o e n o t a h t s e r i u q e r e s u d e d n e e l g n i s : 1 e t o n o t r o t s i s e r a s i k r o w t e n s a i b t u p n i d e d n e m m o c e r e h t s l e v e l l t t v l d n a s o m c v l r o f . t u p n i d e d n e e l g n i s e h t r o f t n i o p h c t i w s 1 . 0 a d n a d n u o r g o t e u l a v l a u q e f o r o t s i s e r a , c c v s i t n i o p h c t i w s g n i t l u s e r e h t . d n u o r g o t t u p n i e h t m o r f r o t i c a p a c f . v m 0 0 3 2 / c c v y l e t a m i x o r p p a
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ICS8543 l ow s kew , 1- to -4 lvds f anout b uffer preliminary a bsolute m aximum r atings supply voltage 4.6v inputs -0.5v to vdd + 0.5v outputs -0.5v to vdd + 0.5v ambient operating temperature 0 c to 70 c storage temperature -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 4b. lvpecl dc c haracteristics , vdd = 3.3v5%, 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 k l c p 0 5 1a k l c p n 5a l i it n e r r u c w o l t u p n i k l c p5 -a k l c p n0 5 1 -a p p ve g a t l o v t u p n i k a e p - o t - k a e p 5 1 . 03 . 1v r m c v1 e t o n ; e g a t l o v t u p n i e d o m n o m m o c 5 . 13 . 3v . h i v m u m i n i m e h t s a d e n i f e d s i l c e p v l r o f e g a t l o v e d o m n o m m o c : 1 e t o n t able 4a. p ower s upply dc c haracteristics , vdd = 3.3v5%, 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 d d ve g a t l o v y l p p u s r e w o p5 3 1 . 33 . 35 6 4 . 3v e e it n e r r u c y l p p u s r e w o p 0 5a m t able 4c. lvhstl dc c haracteristics , vdd = 3.3v5%, 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 k l c hv 5 3 1 . 3 i d d v v 5 6 4 . 30 5 1a k l c h nv 5 3 1 . 3 i d d v v 5 6 4 . 35a l i it n e r r u c w o l t u p n i k l c hv 5 3 1 . 3 i d d v v 5 6 4 . 35 -a k l c h nv 5 3 1 . 3 i d d v v 5 6 4 . 30 5 1 -a p p ve g a t l o v t u p n i k a e p - o t - k a e p 5 1 . 03 . 1v r m c v1 e t o n ; e g a t l o v t u p n i e d o m n o m m o c 5 . 05 8 . 0 - d d vv d n a s d v l , m c d h t i w e l b i t a p m o c s i r m c v . e g a t l o v r e v o s s o r c e h t s a d e n i f e d s i l t s h r o f e g a t l o v e d o m n o m m o c : 1 e t o n . s t u p n i l t s s
ICS8543bg www.icst.com/products/hiperclocks.html rev. c may 21, 2001 5

ICS8543 l ow s kew , 1- to -4 lvds f anout b uffer preliminary t able 5. ac c haracteristics , vdd = 3.3v5%, 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 x a m fy c n e u q e r f t u p n i m u m i x a m 0 5 6z h m h l p th g i h - o t - w o l , y a l e d n o i t a g a p o r p0 f z h m 0 5 68 . 14 . 2s n ) o ( k s t2 e t o n ; w e k s t u p t u o 0 5s p ) p p ( k s t3 e t o n ; w e k s t r a p - o t - t r a p 0 0 3s p r te m i t e s i r t u p t u or l 0 0 1 = ? 0 0 20 0 40 0 6s p f te m i t l l a f t u p t u or l 0 0 1 = ? 0 0 20 0 40 0 6s p w p th t d i w e s l u p t u p t u od b t - 2 / e l c y c td b t + 2 / e l c y c 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 . 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 . 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 s s o r c a w e k s s a d e n i f e d : 2 e t o n . t n i o p g n i s s o r c t u p t u o l a i t n e r e f f i d e h t o t t u p n i e h t f o t n i o p % 0 5 e h t m o r f d e r u s a e m s e g a t l o v y l p p u s e m a s e h t t a g n i t a r e p o s e c i v e d t n e r e f f i d n o s t u p t u o t n e r e f f i d t a w e k s s a d e n i f e d : 3 e t o n . t n i o p g n i s s o r c t u p t u o l a i t n e r e f f i d e h t o t s t u p n i e k i l f o % 0 5 m o r f d e r u s a e m . 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 t able 4d. lvcmos / lvttl dc c haracteristics , vdd = 3.3v5%, 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 ie o , l e s _ k l c , n e _ k l c2v l i ve g a t l o v w o l t u p n ie o , l e s _ k l c , n e _ k l c 8 . 0v h i it n e r r u c h g i h t u p n i e o , n e _ k l c 5a l e s _ k l c 0 5 1a l i it n e r r u c w o l t u p n i e o , n e _ k l c0 5 1 -a l e s _ k l c5 -a t able 4e. lvds dc c haracteristics , vdd = 3.3v5%, 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 d o ve g a t l o v t u p t u o l a i t n e r e f f i d0 5 20 5 30 5 4v m ? d o v e g n a h c e d u t i n g a m d o v 45 3v m s o ve g a t l o v t e s f f o5 2 1 . 15 2 . 15 7 3 . 1v ? s o v e g n a h c e d u t i n g a m s o v 55 2v m z o it n e r r u c e g a k a e l e c n a d e p m i h g i h0 1 -1 0 1 +a f f o ie g a k a e l f f o r e w o p0 2 -1 0 2 +a d s o it n e r r u c t i u c r i c t r o h s t u p t u o l a i t n e r e f f i d 0 . 3a m s o it n e r r u c t i u c r i c t r o h s t u p t u o 0 . 3a m
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ICS8543 l ow s kew , 1- to -4 lvds f anout b uffer preliminary p ackage o utline - g s uffix t able 6. p ackage d imensions reference document: jedec publication 95, mo-153 l o b m y s s r e t e m i l l i ms e h c n i n i mx a mn i mx a m n0 2 a- -0 2 . 1- -7 4 0 . 0 1 a5 0 . 05 1 . 02 0 0 . 06 0 0 . 0 2 a0 8 . 05 0 . 12 3 0 . 01 4 0 . 0 b9 1 . 00 3 . 07 0 0 . 02 1 0 . 0 c9 0 . 00 2 . 05 3 0 0 . 08 0 0 . 0 d0 4 . 60 6 . 62 5 2 . 00 6 2 . 0 ec i s a b 0 4 . 6c i s a b 2 5 2 . 0 1 e0 3 . 40 5 . 49 6 1 . 07 7 1 . 0 ec i s a b 5 6 . 0c i s a b 6 5 2 0 . 0 l5 4 . 05 7 . 08 1 0 . 00 3 0 . 0 0 8 0 8 a a a- -0 1 . 0- -4 0 0 . 0 d e1 e aaa c seating plane -c- e a n a1 a2 b c l 10 11 20 1
ICS8543bg www.icst.com/products/hiperclocks.html rev. c may 21, 2001 7

ICS8543 l ow s kew , 1- to -4 lvds f anout b uffer preliminary t able 7. 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, patent s, 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 notice. 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 g b 3 4 5 8 s c ig b 3 4 5 8 s c ip o s s t d a e l 0 2e b u t r e p 2 7c 0 7 o t c 0 t g b 3 4 5 8 s c ig b 3 4 5 8 s c il e e r d n a e p a t n o p o s s t d a e l 0 20 0 5 2c 0 7 o t c 0

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