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843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 1 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary g eneral d escription the ics843003i-01 is a 3 differential output lvpecl synthesizer designed to generate ethernet reference clock frequencies and is a member of the hiperclocks? family of high per- formance clock solutions from ics. using a 19.53125mhz or 25mhz, 18pf parallel resonant crystal, the following frequencies can be generated based on the settings of 4 frequency select pins (div_sel[a1:a0], div_sel[b1:b0]): 625mhz, 312.5mhz, 156.25mhz, and 125mhz. the 843003i-01 has 2 output banks, bank a with 1 differential lvpecl output pair and bank b with 2 dif- ferential lvpecl output pairs. the two banks have their own dedicated frequency se- lect pins and can be independently set for the frequen- cies mentioned above. the ics843003i-01 uses ics? 3rd generation low phase noise vco technology and can achieve 1ps or lower typical rms phase jitter, easily meet- ing ethernet jitter requirements. the ics843003i-01 is packaged in a small 24-pin tssop package. f eatures ? three 3.3v lvpecl outputs on two banks, a bank with one lvpecl pair and b bank with 2 lvpecl output pairs ? using a 19.53125mhz or 25mhz crystal, the two output banks can be independently set for 625mhz, 312.5mhz, 156.25mhz or 125mhz ? selectable crystal oscillator interface or lvcmos/lvttl single-ended input ? vco range: 490mhz to 680mhz ? rms phase jitter @ 156.25mhz (1.875mhz - 20mhz): 0.53ps (typical) ? 3.3v output supply mode ? -40c to 85c ambient operating temperature hiperclocks? ics p in a ssignment ics843003i-01 24-lead tssop 4.40mm x 7.8mm x 0.92mm package body g package top view div_selb0 vco_sel mr v cco _ a qa0 nqa0 clk_enb clk_ena fb_div v cca v cc div_sela0 1 2 3 4 5 6 7 8 9 10 11 12 div_selb1 v cco _ b qb0 nqb0 qb1 nqb1 xtal_sel test_clk xtal_in xtal_out v ee div_sela1 24 23 22 21 20 19 18 17 16 15 14 13 0 1 0 1 phase detector vco 0 = 25 (default) 1 = 32 0 0 1 0 1 2 1 0 3 1 1 4 (default) 0 0 2 0 1 4 1 0 5 1 1 8 (default) fb_div osc clk_ena div_sela[1:0] vco_sel test_clk xtal_in xtal_out xtal_sel fb_div div_selb[1:0] mr clk_enb qa0 nqa0 qb0 nqb0 qb1 nqb1 pulldown pulldown pullup pullup pullup pullup pulldown pullup pullup b lock d iagram 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.
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 2 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary t able 1. p in d escriptions t able 2. p in c haracteristics r e b m u ne m a ne p y tn o i t p i r c s e d 1 4 2 0 b l e s _ v i d 1 b l e s _ v i d t u p n ip u l l u p . h g i h = t l u a f e d . b k n a b r o f n i p t c e l e s n o i s 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 2l e s _ o c vt u p n ip u l l u p r o e c n e r e f e r l a t s y r c e h t d n a d e s s a p y b s i l l p e h t , w o l n e h w . n i p t c e l e s o c v e h t o t y l t c e r i d d e s s a p e r a ) g n i t t e s l e s _ l a t x n o g n i d n e p e d ( k l c _ t s e t y b d e s s a p y b t o n s i l l p e h t o s r o t s i s e r p u l l u p l a n r e t n i n a s a h . s r e d i v i d t 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 l u a f e d 3r mt u p n in w o d l l u p t e s e r e r a s r e d i v i d l a n r e t n i e h t , h g i h c i g o l n e h w . t e s e r r e t s a m h g i h e v i t c a x q n s t u p t u o d e t r e v n i e h t d n a w o l o g o t x q s t u p t u o e u r t e h t g n i s u a c e r a s t u p t u o e h t d n a s r e d i v i d l a n r e t n i e h t , w o l c i g o l n e h w . h g i h o g o t f o e t a t s t l u a f e d p u - r e w o p e h t o s r o t s i s e r n w o d l l u p l a n r e t n i n a s a h . d e l b a n e . 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 . d e l b a n e e r a s r e d i v i d d n a s t u p t u o 4v a _ o c c r e w o p. s t u p t u o a k n a b r o f n i p y l p p u s t u p t u o 6 , 50 a q n , 0 a qt u p u o. s l e v e l e c a f r e t n i l c e p v l . r i a p t u p t u o l a i t n e r e f f i d 7b n e _ k l ct u p n ip u l l u p . e l b a n e t u p t u o h g i h e v i t c a . s t u p t u o b k n a b r o f e l b a n e k c o l c g n i z i n o r h c n y s e h t , w o l c i g o l n e h w . d e l b a n e s i b k n a b n i r i a p t u p t u o e h t , h g i h c i g o l n e h w p u l l u p l a n r e t n i n a s a h . h g i h e r a s t u p t u o b q n d n a w o l e r a s t u p t u o b q . d e l b a n e s i t u p t u o f o e t a t s p u - r e w o p t l u a f e d e h t o s r o t s i s e r . 1 e r u g i f e e s . 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 8a n e _ k l ct u p n ip u l l u p . e l b a n e t u p t u o h g i h e v i t c a . s t u p t u o a k n a b r o f e l b a n e k c o l c g n i z i n o r h c n y s e h t , w o l c i g o l n e h w . d e l b a n e s i a k n a b n i r i a p t u p t u o e h t , h g i h c i g o l n e h w r o t s i s e r p u l l u p l a n r e t n i n a s a h . h g i h s i t u p t u o a q n d n a w o l s i t u p t u o a q . d e l b a n e s i t u p t u o f o e t a t s p u - r e w o p t l u a f e d e h t o s . 1 e r u g i f e e s . 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 9v i d _ b ft u p n in w o d l l u p r o f t e s s i r e d i v i d k c a b d e e f e h t , ) t l u a f e d ( w o l n e h w . t c e l e s e d i v i d k c a b d e e f . 2 3 r o f t e s s i r e d i v i d k c a b d e e f e h t , h g i h n e h w . 5 2 . 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 0 1v a c c r e w o p. n i p y l p p u s g o l a n a 1 1v c c r e w o p. n i p y l p p u s e r o c 2 1 3 1 0 a l e s _ v i d 1 a l e s _ v i d t u p n ip u l l u p . h g i h = t l u a f e d . a k n a b r o f n i p t c e l e s n o i s 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 4 1v e e r e w o p. n i p y l p p u s e v i t a g e n 6 1 , 5 1 , t u o _ l a t x n i _ l a t x t u p n i e h t s i n i _ l a t x , t u p t u o e h t s i t u o _ l a t x . e c a f r e t n i l a t s y r c t n a n o s e r l e l l a r a p l a t s y r c e h t e v i r d r e v o o t t n a w u o y f i n i p e v i r d r e v o e h t o s l a s i n i _ l a t x . t u p n i . k c o l c e c n e r e f e r d e d n e - e l g n i s a h t i w t i u c r i c 7 1k l c _ t s e tt u p n in w o d l l u p l l u p o t r o t s i s e r n w o d l l u p l a n r e t n i n a s a h . t u p n i k c o l c e c n e r e f e r d e d n e - e l g n i s . e c a f r e t n i l a t s y r c e h t g n i s u f i g n i t a o l f e v a e l n a c . t l u a f e d y b e t a t s w o l o t . 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 8 1l e s _ l a t xt u p n ip u l l u p l a t s y r c r o k l c _ t s e t d e d n e - e l g n i s e h t n e e w t e b s t c e l e s . n i p t c e l e s l a t s y r c d e t c e l e s s i e c a f r e t n i l a t s y r c e h t o s r o t s i s e r p u l l u p l a n r e t n i n a s a h . e c a f r e t 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 . t l u a f e d y b 0 2 , 9 11 b q , 1 b q nt u p t u o. s l e v e l e c a f r e t n i l c e p 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 2 , 1 20 b q , 0 b q nt u p t u o. s l e v e l e c a f r e t n i l c e p 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 2v b _ o c c r e w o p. s t u p t u o b k n a b r o f n i p y l p p u s t u p t u o : e t o n n w o d l l u p d n a p u 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 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 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 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
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 3 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary t able 3b. b ank b f requency t able s t u p n i k c a b d e e f r e d i v i d b k n a b r e d i v i d t u p t u o n / m n o i t a c i l p i t l u m r o t c a f 0 b q n / 0 b q t u p t u o y c n e u q e r f ) z h m ( y c n e u q e r f l a t s y r c ) z h m ( v i d _ b f1 b l e s _ v i d0 b l e s _ v i d 5 20005 22 5 . 2 15 . 2 1 3 0 20005 22 5 . 2 10 5 2 5 20015 24 5 2 . 65 2 . 6 5 1 4 20015 24 5 2 . 60 5 1 0 20015 24 5 2 . 65 2 1 5 20105 25 5 5 2 1 5 20115 28 5 2 1 . 35 2 1 . 8 7 4 20115 28 5 2 1 . 35 7 0 20115 28 5 2 1 . 35 . 2 6 4 4 . 9 11002 32 6 14 0 . 1 1 3 5 2 6 . 5 11002 32 6 10 5 2 4 4 . 9 11012 34 8 2 5 . 5 5 1 5 7 . 8 11012 34 8 0 5 1 5 2 6 . 5 11012 34 8 5 2 1 5 2 6 . 5 11102 35 4 . 60 0 1 4 4 . 9 11112 38 4 6 7 . 7 7 5 7 . 8 11112 38 4 5 7 5 2 6 . 5 11112 38 4 5 . 2 6 t able 3a. b ank a f requency t able s t u p n i k c a b d e e f r e d i v i d a k n a b r e d i v i d t u p t u o n / m n o i t a c i l p i t l u m r o t c a f 0 a q n / 0 a q t u p t u o y c n e u q e r f ) z h m ( y c n e u q e r f l a t s y r c ) z h m ( v i d _ b f1 a l e s _ v i d0 a l e s _ v i d 5 20005 21 5 25 2 6 5 20015 22 5 . 2 15 . 2 1 3 0 20015 22 0 0 5 . 2 10 5 2 5 . 2 20105 23 3 3 3 . 85 . 7 8 1 5 20115 24 5 2 . 65 2 . 6 5 1 4 20115 24 5 2 . 60 5 1 0 20115 24 5 2 . 65 2 1 4 4 . 9 11002 31 2 38 0 . 2 2 6 4 4 . 9 11012 32 6 14 0 . 1 1 3 5 2 6 . 5 11012 32 6 10 5 2 5 7 . 8 11102 33 7 6 6 . 0 10 0 2 4 4 . 9 11112 34 8 2 5 . 5 5 1 5 7 . 8 11112 34 8 0 5 1 5 2 6 . 5 11112 34 8 5 2 1
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 4 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary t able 3c. o utput b ank c onfiguration s elect f unction t able s t u p n is t u p t u o 1 a l e s _ v i d0 a l e s _ v i da q 001 012 103 114 t able 3d. f eedback d ivider c onfiguration s elect f unction t able s t u p n i v i d _ b fe d i v i d k c a b d e e f 05 2 12 3 s t u p n is t u p t u o 1 b l e s _ v i d0 b l e s _ v i db q 002 014 105 118 f igure 1. clk_en t iming d iagram enabled disabled test_clk clk_enx nqa0, nqb0:nqb1 qa0, qb0:qb1 t able 3e. clk_ena s elect f unction t able s t u p n is t u p t u o a n e _ k l c0 a q0 a q n 0w o lh g i h 1e v i t c ae v i t c a t able 3f. clk_enb s elect f unction t able s t u p n is t u p t u o b n e _ k l c1 b q : 0 b q1 b q n : 0 b q n 0w o lh g i h 1e v i t c ae v i t c a
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 5 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary t able 4a. p ower s upply dc c haracteristics , v cc = v cca = v cco_a = v cco_b = 3.3v5%, ta = -40c to 85c a bsolute m aximum r atings supply voltage, v cc 4.6v inputs, v i -0.5v to v cc + 0.5v outputs, i o continuous current 50ma surge current 100ma package thermal impedance, ja 70c/w (0 lfpm) storage temperature, t stg -65c to 150c note: 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 be- yond those listed in the dc characteristics or ac character- istics is not implied. exposure to absolute maximum rating conditions for extended periods may affect product reliability. 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 c c e g a t l o v y l p p u s e r o c 5 3 1 . 33 . 35 6 4 . 3v v a c c e g a t l o v y l p p u s g o l a n a 5 3 1 . 33 . 35 6 4 . 3v v b , a _ o c c e g a t l o v y l p p u s t u p t u o 5 3 1 . 33 . 35 6 4 . 3v i e e t n e r r u c y l p p u s r e w o p 1 2 1a m i a c c t n e r r u c y l p p u s g o l a n a 5 1a m t able 4b. lvcmos / lvttl dc c haracteristics , v cc = v cca = v cco_a = v cco_b = 3.3v5%, ta = -40c to 85c 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 i 2v c c 3 . 0 +v v l i e g a t l o v w o l t u p n i 3 . 0 -8 . 0v i h i t u p n i t n e r r u c h g i h v i d _ b f , r m , k l c _ t s e tv c c v = n i v 5 6 4 . 3 =0 5 1a , 1 a l e s _ v i d , 0 a l e s _ v i d , 1 b l e s _ v i d , 0 b l e s _ v i d , l e s _ l a t x , l e s _ o c v b n e _ k l c , a n e _ k l c v c c v = n i v 5 6 4 . 3 =5a i l i t u p n i t n e r r u c w o l v i d _ b f , r m , k l c _ t s e tv c c v , v 5 6 4 . 3 = n i v 0 =5 -a , 1 a l e s _ v i d , 0 a l e s _ v i d , 1 b l e s _ v i d , 0 b l e s _ v i d , l e s _ l a t x , l e s _ o c v b n e _ k l c , a n e _ k l c v c c v , v 5 6 4 . 3 = n i v 0 =0 5 1 -a t able 4c. lvpecl dc c haracteristics , v cc = v cca = v cco_a = v cco_b = 3.3v5%, ta = -40c to 85c 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 o 1 e t o n ; e g a t l o v h g i h t u p t u ov o c c 4 . 1 -v o c c 9 . 0 -v v l o 1 e t o n ; e g a t l o v w o l t u p t u ov o c c 0 . 2 -v o c c 7 . 1 -v v g n i w s g n i w s e g a t l o v t u p t u o k a e p - o t - k a e p 6 . 00 . 1v 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 c c . v 2 -
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 6 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary t able 6. ac c haracteristics , v cc = v cca = v cco_a = v cco_b = 3.3v5%, ta = -40c to 85c t able 5. c rystal 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 f t u o e g n a r y c n e u q e r f t u p t u o 1 = r e d i v i d t u p t u o0 9 40 8 6z h m 2 = r e d i v i d t u p t u o5 4 20 4 3z h m 3 = r e d i v i d t u p t u o3 3 . 3 6 17 6 . 6 2 2z h m 4 = r e d i v i d t u p t u o5 . 2 2 10 7 1z h m 5 = r e d i v i d t u p t u o8 96 3 1z h m 8 = r e d i v i d t u p t u o5 2 . 1 65 8z h m t ) b ( k s1 e t o n , w e k s k n a b d b ts p t ) o ( k s4 , 2 e t o n ; w e k s t u p t u o y c n e u q e r f e m a s @ s t u p t u od b ts p s e i c n e u q e r f t n e r e f f i d @ s t u p t u od b ts p t ) ? ( t i j ; ) m o d n a r ( r e t t i j e s a h p s m r 3 e t o n ) z h m 0 2 - z h m 5 7 8 . 1 ( z h m 5 2 63 4 . 0s p ) z h m 0 2 - z h m 5 7 8 . 1 ( z h m 5 . 2 1 31 5 . 0s p ) z h m 0 2 - z h m 5 7 8 . 1 ( z h m 5 2 . 6 5 13 5 . 0s p ) z h m 0 2 - z h m 5 7 8 . 1 ( z h m 5 2 18 4 . 0s p t r t / f e m i t l l a f / e s i r t u p t u o% 0 8 o t % 0 20 0 4s p c d oe l c y c y t u d t u p t u o 0 5% . 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 e m a s e h t t a s t u p t u o f o k n a b a n i h t n i w w e k s s a d e n i f e d : 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 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 . s t n i o p s s o r c l a i t n e r e f f i d t u p t u o e h t t a d e r u s a e m . s t o l p e s i o n e s a h p e h t o t r e f e r e s a e l p : 3 e t o n . 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 r 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 o i t a l l i c s o f o e d o m l a t n e m a d n u f y c n e u q e r f 5 2 = v i d _ b f6 . 9 12 . 7 2z h m 2 3 = v i d _ b f3 1 3 . 5 15 2 . 1 2z h m ) r s e ( e c n a t s i s e r s e i r e s t n e l a v i u q e 0 5 e c n a t i c a p a c t n u h s 7f p l e v e l e v i r d 1w m . l a t s y r c t n a n o s e r l e l l a r a p f p 8 1 n a g n i s u d e z i r e t c a r a h c : e t o n
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 7 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary t ypical p hase n oise at 156.25mh z 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 - 190 156.25mhz rms phase jitter (random) 1.875mhz to 20mhz = 0.53ps (typical) o ffset f requency (h z ) 1k 10k 100k 1m 10m 100m ? ? dbc hz n oise p ower ? phase noise result by adding 10gb ethernet filter to raw data raw phase noise data 10gb ethernet filter
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 8 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary p arameter m easurement i nformation 3.3v c ore /3.3v o utput l oad ac t est c ircuit scope qx nqx lvpecl 2v -1.3v0.165v v cc , v cca , v cco_a. _b v ee phase noise mas k offset frequency f 1 f 2 phase noise plot rms jitter = area under the masked phase noise plot noise power rms p hase j itter t sk(b) qa0, qb0, qb1 nqa0, nqb0, nqb1 t sk(o) qy qx nqy nqx nqb0 qb0 nqb1 qb1 b ank s kew o utput s kew t pw t period t pw t period odc = x 100% o utput r ise /f all t ime clock outputs 20% 80% 80% 20% t r t f v swing o utput d uty c ycle /p ulse w idth /p eriod
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 9 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary a pplication i nformation c rystal i nput i nterface the ics843003i-01 has been characterized with 18pf par- allel resonant crystals. the capacitor values shown in figure 3 below were determined using a 19.53125mhz or figure 3. c rystal i npu t i nterface 25mhz 18pf parallel resonant crystal and were chosen to minimize the ppm error. ics843003i-01 p ower s upply f iltering t echniques as in any high speed analog circuitry, the power supply pins are vulnerable to random noise. the ics843003i-01 provides separate power supplies to isolate any high switching noise from the outputs to the internal pll. v cc , v cca , and v ccox should be individually connected to the power supply plane through vias, and bypass capacitors should be used for each pin. to achieve optimum jitter performance, power supply isolation is required. figure 2 illustrates how a 10 resistor along with a 10 f and a .01 f bypass capacitor should be connected to each v cca pin. f igure 2. p ower s upply f iltering 10 v cca 10 f .01 f 3.3v .01 f v cc c1 22p x1 18pf parallel crystal c2 22p xtal_out xtal_in
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 10 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary t ermination for 3.3v lvpecl o utput v cc - 2v 50 50 rtt z o = 50 z o = 50 fout fin rtt = z o 1 ((v oh + v ol ) / (v cc ? 2)) ? 2 3.3v 125 125 84 84 z o = 50 z o = 50 fout fin the clock layout topology shown below is a typical termi- nation for lvpecl outputs. the two different layouts men- tioned are recommended only as guidelines. fout and nfout are low impedance follower outputs that generate ecl/lvpecl compatible outputs. therefore, ter- minating resistors (dc current path to ground) or current sources must be used for functionality. these outputs are f igure 4b. lvpecl o utput t ermination f igure 4a. lvpecl o utput t ermination designed to drive 50 transmission lines. matched imped- ance techniques should be used to maximize operating frequency and minimize signal distortion. figures 4a and 4b show two different layouts which are recommended only as guidelines. other suitable clock layouts may exist and it would be recommended that the board designers simulate to guarantee compatibility across all printed cir- cuit and clock component process variations.
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 11 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary r eliability i nformation t ransistor c ount the transistor count for ics843003i-01 is: 3822 t able 7. ja vs . a ir f low t able for 24 l ead tssop ja by velocity (meters per second) 0 1 2.5 multi-layer pcb, jedec standard test boards 70c/w 65c/w 62c/w
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 12 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary p ackage o utline - g s uffix for 24 l ead tssop t able 8. 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 m m u m i n i mm u m i x a m n4 2 a- -0 2 . 1 1 a5 0 . 05 1 . 0 2 a0 8 . 05 0 . 1 b9 1 . 00 3 . 0 c9 0 . 00 2 . 0 d0 7 . 70 9 . 7 ec i s a b 0 4 . 6 1 e0 3 . 40 5 . 4 ec i s a b 5 6 . 0 l5 4 . 05 7 . 0 0 8 a a a- -0 1 . 0
843003agi-01 www.icst.com/products/hiperclocks.html rev. a may 26, 2005 13 integrated circuit systems, inc. ics843003i-01 f emto c locks ? c rystal - to -3.3v lvpecl f requency s ynthesizer preliminary t able 9. 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 and industrial applications. any other applications such as those requiring 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 pg n i g a k c a p g n i p p i h se r u t a r e p m e t 1 0 - i g a 3 0 0 3 4 8 s c i1 0 i a 3 0 0 3 4 8 s c ip o s s t d a e l 4 2e b u tc 5 8 o t c 0 4 - t 1 0 - i g a 3 0 0 3 4 8 s c i1 0 i a 3 0 0 3 4 8 s c id a e l 4 2l e e r & e p a t 0 0 5 2c 5 8 o t c 0 4 - the aforementioned trademarks, hiperclocks? and femtoclocks? are a trademark of integrated circuit systems, inc. or its subsi diaries in the united states and/or other countries.

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