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8304AMI www.icst.com/products/hiperclocks.html rev. b april 4, 2002 1

ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer g eneral d escription the ics8304i is a low skew, 1-to-4 fanout buffer and a member of the hiperclocks? family of high performance clock solutions from ics. the ics8304i is characterized at full 3.3v for input v dd , and mixed 3.3v and 2.5v for output operating supply modes (v ddo ). guaran- teed output and part-to-part skew characteristics make the ics8304i ideal for those clock distribution applications demanding well defined performance and repeatability. f eatures ? 4 lvcmos / lvttl outputs ? lvcmos clock input ? clk can accept the following input levels: lvcmos, lvttl ? maximum output frequency: 166mhz ? output skew: 60ps (maximum) ? part-to-part skew: 650ps (maximum) ? small 8 lead soic package saves board space ? 3.3v input, outputs may be either 3.3v or 2.5v supply modes ? -40c to 85c ambient operating temperature b lock d iagram p in a ssignment ics8304i 8-lead soic 3.8mm x 4.8mm, x 1.47mm package body m package to p vi e w v ddo v dd clk gnd 1 2 3 4 q0 q1 q2 q3 clk hiperclocks? q3 q2 q1 q0 8 7 6 5
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ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer t able 1. p in d escriptions t able 2. p in c haracteristics 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 n i e c n a t i c a p a c t u p n i 4f p c d p e c n a t i c a p a c n o i t a p i s s i d r e w o p ) t u p t u o r e p ( v d d v , o d d v 5 6 4 . 3 =5 1f p r p u l l u p r o t s i s e r p u l l u p t u p n i 1 5k ? r n w o d l l u p r o t s i s e r n w o d l l u p t u p n i 1 5k ? r t u o e c n a d e p m i t u p t u o 7 ? r e b m u ne m a ne p y tn o i t p i r c s e d 1v o d d r e w o p. v 5 . 2 r o v 3 . 3 o t t c e n n o c . n i p y l p p u s t u p t u o 2v d d r 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 e v i t i s o p 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 t t v l / s o m c v l 4d n gr 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 50 qt u p t u o . 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 . t u p t u o k c o l c e l g n i s 61 qt u p t u o . 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 . t u p t u o k c o l c e l g n i s 72 qt u p t u o . 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 . t u p t u o k c o l c e l g n i s 83 qt u p t u o . 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 . t u p t u o k c o l c e l g n i s : 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 r e f e r
8304AMI www.icst.com/products/hiperclocks.html rev. b april 4, 2002 3

ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer 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 112.7 c/w (0 lfpm) 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 th e dc characteristics or ac characteristics is not implied. exposure to absolute maximum rating conditions for extended peri- ods may affect product reliability. t able 3a. p ower s upply dc c haracteristics , v dd = v ddo = 3.3v5%, t a = -40 c to 85 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 v d d e g a t l o v y l p p u s r e w o p5 3 1 . 33 . 35 6 4 . 3v v o d d e g a t l o v y l p p u s r e w o p t u p t u o5 3 1 . 33 . 35 6 4 . 3v i d d t n e r r u c y l p p u s r e w o p 8 1a m i o d d t n e r r u c y l p p u s t u p t u o 1 1a m t able 3b. lvcmos / lvttl dc c haracteristics , v dd = v ddo = 3.3v5%, t a = -40 c to 85 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 v h i e g a t l o v h g i h t u p n i2v d d 3 . 0 +v v l i e g a t l o v w o l t u p n i3 . 0 -3 . 1v i h i t n e r r u c h g i h t u p n iv d d v = n i v 5 6 4 . 3 =0 5 1a i l i t n e r r u c w o l t u p n iv d d v , v 5 6 4 . 3 = n i v 0 =5 -a v h o e g a t l o v h g i h t u p t u o 1 e t o n o t r e f e r6 . 2v i h o a m 6 1 - =9 . 2v i h o a u 0 0 1 - =3 v v l o e g a t l o v w o l t u p t u o 1 e t o n o t r e f e r5 . 0v i l o a m 6 1 =5 2 . 0v i l o a u 0 0 1 =5 1 . 0v 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 ? v o t o d d . " t i u c r i c t s e t d a o l t u p t u o v 3 . 3 " , n o i t c e s t n e m e r u s a e m r e t e m a r a p e e s . 2 /
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ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer t able 3c. p ower s upply dc c haracteristics , v dd = 3.3v5%, v ddo = 2.5v5%, t a = -40 c to 85 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 v d d e 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 v o d d e g a t l o v y l p p u s t u p t u o 5 7 3 . 25 . 25 2 6 . 2v i d d t n e r r u c y l p p u s r e w o p 8 1a m i o d d t n e r r u c y l p p u s t u p t u o 1 1a m t able 3d. lvcmos / lvttl dc c haracteristics , v dd = 3.3v5%, v ddo = 2.5v5%, t a = -40 c to 85 c t able 4a. ac c haracteristics , v dd = v ddo = 3.3v5%, t a = -40 c to 85 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 x a m y c n e u q e r f t u p t u o 6 6 1z h m p t h l 1 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 ? z h m 6 6 12 3 . 3s n t ) o ( k s4 , 2 e t o n ; w e k s t u p t u oz h m 3 3 1 = f0 5s p t ) p p ( k s4 , 3 e t o n ; w e k s t r a p - o t - t r a p 0 0 6s p t r e m i t e s i r t u p t u o% 0 7 o t % 0 30 5 20 0 5s p t f e m i t l l a f t u p t u o% 0 7 o t % 0 30 5 20 0 5s p c d oe l c y c y t u d t u p t u o 0 40 6% . e s i w r e h t o d e t o n s s e l n u z h m 6 6 1 t a d e r u s a e m s r e t e m a r a p l l a v m o r f d e r u s a e m : 1 e t o n d d v o t t u p n i e h t f o 2 / o d d . t u p t u o e h t f o 2 / . 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 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 n e e w t e b w e k s s a d e n i f e d : 2 e t o n v t a d e r u s a e m o d d . 2 / 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 n e e w t e b w e k s s a d e n i f e d : 3 e t o n d e r u s a e m e r a s t u p t u o e h t , e c i v e d h c a e n o s t u p n i f o e p y t e m a s e h t g n i s u . 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 v t a o d d . 2 / . 5 6 d r a d n a t s c e d e j h t i w e c n a d r o c c a n i d e n i f e d s i r e t e m a r a p s i h t : 4 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 v h i e g a t l o v h g i h t u p n i2v d d 3 . 0 +v v l i e g a t l o v w o l t u p n i3 . 0 -3 . 1v i h i t n e r r u c h g i h t u p n iv d d v = n i v 5 6 4 . 3 =0 5 1a i l i t n e r r u c w o l t u p n iv d d v , v 5 6 4 . 3 = n i v 0 =5 -a v h o 1 e t o n ; e g a t l o v h g i h t u p t u o1 . 2v v l o 1 e t o n ; e g a t l o v w o l t u p t u o 5 . 0v 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 ? v o t o d d , n o i t c e s t n e m e r u s a e m r e t e m a r a p e e s . 2 / . " t i u c r i c t s e t d a o l t u p t u o v 5 . 2 / v 3 . 3 "
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ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer 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 x a m y c n e u q e r f t u p t u o 6 6 1z h m p t h l 1 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 ? z h m 6 6 13 . 27 . 3s n t ) o ( k s4 , 2 e t o n ; w e k s t u p t u oz h m 3 3 1 = f0 6s p t ) p p ( k s4 , 3 e t o n ; w e k s t r a p - o t - t r a p 0 5 6s p t r e m i t e s i r t u p t u o% 0 7 o t % 0 30 5 20 0 5s p t f e m i t l l a f t u p t u o% 0 7 o t % 0 30 5 20 0 5s p c d oe l c y c y t u d t u p t u o 0 40 6% . e s i w r e h t o d e t o n s s e l n u z h m 6 6 1 t a d e r u s a e m s r e t e m a r a p l l a v m o r f d e r u s a e m : 1 e t o n d d v o t t u p n i e h t f o 2 / o d d . t u p t u o e h t f o 2 / . 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 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 n e e w t e b w e k s s a d e n i f e d : 2 e t o n v t a d e r u s a e m o d d . 2 / 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 n e e w t e b w e k s s a d e n i f e d : 3 e t o n d e r u s a e m e r a s t u p t u o e h t , e c i v e d h c a e n o s t u p n i f o e p y t e m a s e h t g n i s u . 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 v t a o d d . 2 / . 5 6 d r a d n a t s c e d e j h t i w e c n a d r o c c a n i d e n i f e d s i r e t e m a r a p s i h t : 4 e t o n t able 4b. ac c haracteristics , v dd = 3.3v5%, v ddo = 2.5v5%, t a = -40 c to 85 c
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ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer scope qx lvcmos 3.3v o utput l oad t est c ircuit -1.65v5% gnd v dd, v ddo 1.65v5% scope qx lvcmos v dd v ddo 3.3v/2.5v o utput l oad t est c ircuit 2.05v5% gnd 1.25v5% -1.25v5% p arameter m easurement i nformation
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ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer i nput and o utput r ise and f all t ime clock inputs and outputs 30% 70% 70% 30% t r t f o utput s kew qx qy t sk(o) p art - to -p art s kew qx qy part 1 part 2 t sk(pp) v ddo 2 v ddo 2 v ddo 2 v ddo 2
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ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer t pw & t p eriod p ropagation d elay clk q0:q3 t pd v dd 2 v ddo 2 t pw t period v ddo 2 v ddo 2 v ddo 2 t pw t period odc = q0 :q3
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ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer t ransistor c ount the transistor count for ics8304i is: 416 t able 5. vs . a ir f low t able ja by velocity (linear feet per minute) 0 200 500 single-layer pcb, jedec standard test boards 153.3 c/w 128.5 c/w 115.5 c/w multi-layer pcb, jedec standard test boards 112.7 c/w 103.3 c/w 97.1 c/w note: most modern pcb designs use multi-layered boards. the data in the second row pertains to most designs.
8304AMI www.icst.com/products/hiperclocks.html rev. b april 4, 2002 10

ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer t able 6. p ackage d imensions - s uffix m reference document: jedec publication 95, ms-012 p ackage o utline - s uffix m l o b m y s s r e t e m i l l i m n u m i n i mm u m i x a m n8 a5 3 . 15 7 . 1 1 a0 1 . 05 2 . 0 b3 3 . 01 5 . 0 c9 1 . 05 2 . 0 d0 8 . 40 0 . 5 e0 8 . 30 0 . 4 ec i s a b 7 2 . 1 h0 8 . 50 2 . 6 h5 2 . 00 5 . 0 l0 4 . 07 2 . 1 0 8
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ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer 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 and industrial applications. any other applications such as those requiring high reliability, or other ext raordinary 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 i m a 4 0 3 8 s c ii m a 4 0 3 8c i o s d a e l 8e b u t r e p 6 9c 5 8 o t c 0 4 - t i m a 4 0 3 8 s c ii m a 4 0 3 8l e e r d n a e p a t n o c i o s d a e l 80 0 5 2c 5 8 o t c 0 4 -
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ics8304i l ow s kew , 1- to -4 lvcmos / lvttl f anout b uffer t e e h s y r o t s i h n o i s i v e r v e re l b a te g a pe g n a h c f o n o i t p i r c s e de t a d bb 33 i d e d d a , e l b a t s c i t s i r e t c a r a h c c d l t t v l / s o m c v l h o i d n a l o s n o i t i d n o c t s e t v o t h o v d n a l o . s w o r 2 0 / 4 / 4

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