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ICS8520dy www.icst.com/products/hiperclocks.html rev. b july 5, 2001 1 preliminary

ICS8520 l ow s kew , 1- to -16 d ifferential - to -3.3v lvhstl f anout b uffer g eneral d escription the ICS8520 is a low skew, high performance 1-to-16 differential-to-3.3v lvhstl fanout buffer and a member of the hiperclocks? family of high performance clock solutions from ics. the ICS8520 has 1 clock input pair. the clk, nclk pair can accept most standard differential input levels. guaranteed output skew, part-to-part skew and crossover voltage characteristics make the ICS8520 ideal for interfac- ing to today?s most advanced microprocessor and static rams. f eatures 16 differential 3.3v lvhstl outputs each with the ability to drive 50 ? to ground 1 differential clk, nclk input pair clk, nclk pair can accept the following differential input levels: lvds, lvpecl, lvhstl, sstl, hcsl maximum output frequency up to 500mhz translates single ended input levels to lvhstl levels with resistor bias nclk input output skew: 50ps (maximum) part-to-part skew: 250ps (maximum) propagation delay: 1.6ns (maximum) voh: 1.2v (maximum) 40% of voh vcrossover 60% of voh 3.3v core, 1.8v output operating supply voltages 0c to 70c ambient operating temperature b lock d iagram p in a ssignment 48 47 46 45 44 43 42 41 40 39 38 37 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11 12 36 35 34 33 32 31 30 29 28 27 26 25 vcco q11 nq11 q10 nq10 gnd q9 nq9 q8 nq8 vcco vcc clk vcco nq0 q0 nq1 q1 gnd nq2 q2 nq3 q3 vcco nclk vcco q15 nq15 q14 nq14 gnd q13 nq13 q12 nq12 vcco ICS8520 vcco nq4 q4 nq5 q5 gnd nq6 q6 nq7 q7 vcco vcc 48-lead lqfp 7mm x 7mm x 1.4mm body package y package to p v i e w 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. hiperclocks ? ,&6 clk nclk q0 nq0 q1 nq1 q2 nq2 q3 nq3 q4 nq4 q5 nq5 q6 nq6 q7 nq7 q15 nq15 q14 nq14 q13 nq13 q12 nq12 q11 nq11 q10 nq10 q9 nq9 q8 nq8
ICS8520dy www.icst.com/products/hiperclocks.html rev. b july 5, 2001 2 preliminary

ICS8520 l ow s kew , 1- to -16 d ifferential - to -3.3v lvhstl f anout b uffer 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 , 1 1 , 1 , 4 2 , 4 1 , 5 3 , 5 2 8 4 , 8 3 o c c 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 t u p t u o 3 , 21 1 q n , 1 1 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 5 , 40 1 q n , 0 1 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d , 9 1 , 6 3 4 , 0 3 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 y l p p u s e v i t a g e n 8 , 79 q n , 9 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 0 1 , 98 q n , 8 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 3 1 , 2 1c c vr e w o p. v 3 . 3 o t t c e n n o c . s n i p y l p p u s e v i t i s o p 6 1 , 5 17 q n , 7 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 8 1 , 7 16 q n , 6 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 1 2 , 0 25 q n , 5 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 3 2 , 2 24 q n , 4 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 7 2 , 6 23 q n , 3 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 9 2 , 8 22 q n , 2 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 6 3k l ct 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 7 3k l c 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 0 4 , 9 35 1 q n , 5 1 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 2 4 , 1 44 1 q n , 4 1 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 5 4 , 4 43 1 q n , 3 1 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d 7 4 , 6 42 1 q n , 2 1 qt u p t u o. s l e v e l e c a f r e t n i l t s h v l . r i a p t u p t u o l a i t n e r e f f i d : e t o n p u l l u p d n a n w o d l l u p . 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 a 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
ICS8520dy www.icst.com/products/hiperclocks.html rev. b july 5, 2001 3 preliminary

ICS8520 l ow s kew , 1- to -16 d ifferential - to -3.3v lvhstl f anout b uffer t able 2. p in c haracteristics t able 3. f unction t able 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 ck l c n5 1 q u r h t 0 q5 1 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 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 o t 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 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 ik l c n , k l c4f 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 ?
ICS8520dy www.icst.com/products/hiperclocks.html rev. b july 5, 2001 4 preliminary

ICS8520 l ow s kew , 1- to -16 d ifferential - to -3.3v lvhstl f anout b uffer t able 4a. p ower s upply dc c haracteristics , vcc = 3.3v5%, vcco = 1.8v0.2v, t a = 0 c to 70 c a bsolute m aximum r atings supply voltage, vccx 4.6v inputs, v i -0.5v to vcc+0.5 v outputs, v o -0.5v to vcc+0.5v package thermal impedance, ja 46 c/w (no air flow) 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. functional operation of product at these conditions 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. d ifferential dc c haracteristics , vcc = 3.3v5%, vcco = 1.8v0.2v, t a = 0 c to 70 c t able 4c. lvhstl dc c haracteristics , vcc = 3.3v5%, vcco = 1.8v0.2v, 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 c c ve g a t l o v y l p p u s e v i t i s o p 5 3 1 . 33 . 35 6 4 . 3v o c c ve g a t l o v y l p p u s 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 0 2 1a m 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 ik l cv 5 6 4 . 3 = c c v = n i v0 5 1a k l c nv 5 6 4 . 3 = c c v = n i v1a l i it n e r r u c w o l t u p n ik l cv 5 6 4 . 3 = c c v , v 0 = n i v1 -a k l c nv 5 6 4 . 3 = c c v , v 0 = n i v0 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 p5 1 . 03 . 1v r m c v ; e g n a r e g a t l o v e d o m n o m m o c 2 , 1 e t o n 5 . 0 + e e v5 8 . 0 - c c vv . h i v s a d e n i f e d s i e g a t l o v e d o m n o m m o c : 1 e t o n . v 3 . 0 + c c v s i k l c n , k l c r o f e g a t l o v t u p n i m u m i x a m e h t , s n o i t a c i l p p a d e d n e e l g n i s r o f : 2 e t o n 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 v t u p t u o ; e g a t l o v h g i h 1 e t o n 0 . 12 . 1v l o v t u p t u o ; e g a t l o v w o l 1 e t o n 04 . 0v x o v t u p t u o e g a t l o v r e v o s s o r c l o v + ) l o v - h o v ( x % 0 4l o v + ) l o v - h o v ( x % 0 6v 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 ? . d n u o r g o t
ICS8520dy www.icst.com/products/hiperclocks.html rev. b july 5, 2001 5 preliminary

ICS8520 l ow s kew , 1- to -16 d ifferential - to -3.3v lvhstl f anout b uffer t able 5. ac c haracteristics , vcc = 3.3v5%, vcco = 1.8v0.2v, 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 0 5z h m d p t1 e t o n ; h g i h - o t - w o l , y a l e d n o i t a g a p o r p 0 ICS8520dy www.icst.com/products/hiperclocks.html rev. b july 5, 2001 6 preliminary

ICS8520 l ow s kew , 1- to -16 d ifferential - to -3.3v lvhstl f anout b uffer f igure 1a, 1b, 1c - i nput c lock w aveforms vpp vcmr clk nclk gnd vcc cross points f igure 1a - lvds, hstl, sstl d ifferential i nput l evels vpp vcmr clk nclk gnd vcc cross points f igure 1b - lvpecl d ifferential i nput l evel gnd vcc f igure 1c- lvcmos and lvttl s ingle e nded i nput l evel clk or nclk
ICS8520dy www.icst.com/products/hiperclocks.html rev. b july 5, 2001 7 preliminary

ICS8520 l ow s kew , 1- to -16 d ifferential - to -3.3v lvhstl f anout b uffer 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 c b b m u m i n i ml a n i m o nm u m i x a m n 8 4 a - -- -0 6 . 1 1 a 5 0 . 0- -5 1 . 0 2 a 5 3 . 10 4 . 15 4 . 1 b 7 1 . 02 2 . 07 2 . 0 c 9 0 . 0- -0 2 . 0 d c i s a b 0 0 . 9 1 d c i s a b 0 0 . 7 2 d . f e r 0 5 . 5 e c i s a b 0 0 . 9 1 e c i s a b 0 0 . 7 2 e . f e r 0 5 . 5 e c i s a b 0 5 . 0 l 5 4 . 00 6 . 05 7 . 0 0 - - 7 c c c - -- -8 0 . 0 t able 6. p ackage d imensions reference document: jedec publication 95, ms-026 p ackage o utline - y s uffix
ICS8520dy www.icst.com/products/hiperclocks.html rev. b july 5, 2001 8 preliminary

ICS8520 l ow s kew , 1- to -16 d ifferential - to -3.3v lvhstl f anout b uffer 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 d 0 2 5 8 s c iy d 0 2 5 8 s c ip f q l d a e l 8 4y a r t r e p 0 5 2c 0 7 o t c 0 t y d 0 2 5 8 s c iy d 0 2 5 8 s c il e e r d n a e p a t n o p f q l d a e l 8 40 0 0 1c 0 7 o t c 0 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.

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