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8701cy www.icst.com/products/hiperclocks.html rev. b august 2, 2001 1

ICS8701 l ow s kew 1, 2 c lock g enerator g eneral d escription the ICS8701 is a low skew, 1, 2 clock gen- erator and a member of the hiperclocks? family of high performance clock solutions from ics. the low impedance lvcmos out- puts are designed to drive 50 ? series or par- allel terminated transmission lines. the effective fanout can be increased from 20 to 40 by utilizing the ability of the outputs to drive two series terminated lines. the divide select inputs, div_selx, control the output fre- quency of each bank. the outputs can be utilized in the 1, 2 or a combination of 1 and 2 modes. the bank enable inputs, bank_en0:1, support enabling and disabling each bank of outputs individually. the master reset input, nmr/ oe, resets the internal frequency dividers and also con- trols the active and high impedance states of all outputs. the ICS8701 is characterized at 3.3v and mixed 3.3v input supply, and 2.5v output supply operating modes. guaranteed bank, output and part-to-part skew characteristics make the ICS8701 ideal for those clock distribution applications de- manding well defined performance and repeatability. f eatures 20 lvcmos outputs, 7 ? typical output impedance 1 lvcmos clock input maximum output frequency up to 250mhz bank enable logic allows unused banks to be disabled in reduced fanout applications output skew: 250ps (maximum) part-to-part skew: 600ps (maximum) bank skew: 200ps (maximum) multiple frequency skew: 300ps (maximum) 3.3v or mixed 3.3v input, 2.5v output operating supply modes 0c to 70c ambient operating temperature other divide values available on request b lock d iagram p in a ssignment div_sela div_selb div_selc div_seld nmr/oe bank_en0 bank_en1 qao - qa4 qb0 - qb4 qc0 - qc4 qd0 - qd4 clk 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 qc3 v ddo qc4 qd0 v ddo qd1 gnd qd2 gnd qd3 v ddo qd4 qb1 v ddo qb0 qa4 v ddo qa3 gnd qa2 gnd qa1 v ddo qa0 div_sela div_selb clk gnd v dd bank_en0 gnd bank_en1 v dd nmr/oe div_selc div_seld gnd qb2 gnd qb3 v ddo qb4 qc0 v ddo qc1 gnd qc2 gnd 48-pin lqfp 7mm x 7mm x 1.4mm y package to p v i e w ICS8701 hiperclocks ? ,&6 1 0 1 2 1 0 1 0 1 0 bank enable logic
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ICS8701 l ow s kew 1, 2 c lock g enerator 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 , 5 , 2 , 6 2 , 1 1 , 5 3 , 2 3 4 4 , 1 4 v 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 . s n i p y l p p u s t u p t u o , 8 1 , 9 , 7 , 0 3 , 8 2 , 1 2 , 6 4 , 9 3 , 7 3 8 4 d 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 0 2 , 6 1v d d r 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 , 7 2 , 5 2 , 9 2 3 3 , 1 3 , 1 a q , 0 a q , 2 a q 4 a q , 3 a q t u p t u o . s l e v e l e c a f r e t n i s o m c v l . s t u p t u o a k n a b 7 w . e c n a d e p m i t u p t u o l a c i p y t , 6 3 , 4 3 , 8 3 2 4 , 0 4 , 1 b q , 0 b q , 2 b q 4 b q , 3 b q t u p t u o . s l e v e l e c a f r e t n i s o m c v l . s t u p t u o b k n a b 7 w . e c n a d e p m i t u p t u o l a c i p y t , 5 4 , 3 4 , 7 4 3 , 1 , 1 c q , 0 c q , 2 c q 4 c q , 3 c q t u p t u o . s l e v e l e c a f r e t n i s o m c v l . s t u p t u o c k n a b 7 w . e c n a d e p m i t u p t u o l a c i p y t , 6 , 4 , 8 2 1 , 0 1 , 1 d q , 0 d q , 2 d q 4 d q , 3 d q t u p t u o s l e v e l e c a f r e t n i s o m c v l . s t u p t u o d k n a b 7 w . e c n a d e p m i t u p t u o l a c i p y t 2 2k 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 3 1d l e s _ v i dt u p n ip u l l u p . s t u p t u o d k n a b r o f n o i s i v i d y c n e u q e r f s l o r t n o c . s l e v e l e c a f r e t n i s o m c v l 4 1c l e s _ v i dt u p n ip u l l u p . s t u p t u o c k n a b r o f n o i s i v i d y c n e u q e r f s l o r t n o c . s l e v e l e c a f r e t n i s o m c v l 3 2b l e s _ v i dt u p n ip u l l u p . s t u p t u o b k n a b r o f n o i s i v i d y c n e u q e r f s l o r t n o c . s l e v e l e c a f r e t n i s o m c v l 4 2a l e s _ v i dt u p n ip u l l u p . s t u p t u o a k n a b r o f n o i s i v i d y c n e u q e r f s l o r t n o c . s l e v e l e c a f r e t n i s o m c v l 9 1 , 7 1 , 1 n e _ k n a b 0 n e _ k n a b t u p n ip u l l u p . s l e v e l e c a f r e t n i s o m c v l . s k n a b y b s t u p t u o s e l b a s i d d n a s e l b a n e 5 1e o / r m nt u p n ip u l l u p . s t u p t u o l l a s e l b a s i d d n a s e l b a n e . e l b a n e t u p t u o d n a t e s e r r e t s a m . s l e v e l e c a f r e t n i s o m c v l
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ICS8701 l ow s kew 1, 2 c lock g enerator t able 2. p in c haracteristics t able 3. f unction t able 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 k l c 4f p , b l e s _ v i d , a l e s _ v i d , d l e s _ v i d , c l e s _ v i d , e o / r m n , 0 n e _ k n a b , 1 n e _ k n a b 4 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 w 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 w 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 =f p v d d , v 5 6 4 . 3 = v o d d v 5 2 6 . 2 = r t u o e c n a d e p m i t u p t u o 7 w s t u p n is t u p t u o e o / r m n1 n e _ k n a b0 n e _ k n a bx l e s _ v i d4 a q - 0 a q4 b q - 0 b q4 c q - 0 c q4 d q - 0 d q x q y c n e u q e r f 0x xx z i hz i hz i hz i ho r e z 10 0 0 e v i t c az i hz i hz i h2 / n i f 11 0 0 e v i t c ae v i t c az i hz i h2 / n i f 10 1 0 e v i t c ae v i t c ae v i t c az i h2 / n i f 11 10 e v i t c ae v i t c ae v i t c ae v i t c a2 / n i f 10 0 1 e v i t c az i hz i hz i hn i f 11 0 1 e v i t c ae v i t c az i hz i hn i f 10 1 1 e v i t c ae v i t c ae v i t c az i hn i f 11 1 1 e v i t c ae v i t c ae v i t c ae v i t c an i f
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ICS8701 l ow s kew 1, 2 c lock g enerator 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 47.9 c/w (0lfpm) 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 4a. p ower s upply dc c haracteristics , v dd = v ddo = 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 v h i t u p n i e g a t l o v h g i h , b l e s _ v i d , a l e s _ v i d , d l e s _ v i d , c l e s _ v i d , 1 n e _ k n a b , 0 n e _ k n a b e o / r m n 28 . 3v k l c28 . 3v v l i t u p n i e g a t l o v w o l , b l e s _ v i d , a l e s _ v i d , d l e s _ v i d , c l e s _ v i d , 1 n e _ k n a b , 0 n e _ k n a b e o / r m n v d d v 5 6 4 . 3 =3 . 0 -8 . 0v k l cv d d v 5 6 4 . 3 =3 . 0 -3 . 1v i h i t u p n i t n e r r u c h g i h , b l e s _ v i d , a l e s _ v i d , d l e s _ v i d , c l e s _ v i d , 1 n e _ k n a b , 0 n e _ k n a b e o / r m n v d d =v n i v 5 6 4 . 3 =5a k l cv d d =v n i v 5 6 4 . 3 =0 5 1a i l i t u p n i t n e r r u c w o l , b l e s _ v i d , a l e s _ v i d , d l e s _ v i d , c l e s _ v i d , 1 n e _ k n a b , 0 n e _ k n a b e o / r m n v d d , v 5 6 4 . 3 =v n i v 0 =0 5 1 -a k l cv d d , v 5 6 4 . 3 =v 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 v d d v = o d d v 5 3 1 . 3 = i h o a m 6 3 - = 6 . 2v v l o e g a t l o v w o l t u p t u o v d d v = o d d v 5 3 1 . 3 = i l o a m 6 3 = 5 . 0v 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 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 t n e c s e i u q v d d v = h i v 5 6 4 . 3 = v l i v 0 = 5 9a m t able 4b. lvcmos dc c haracteristics , v dd = v ddo = 3.3v5%, t a =0 c to 70 c
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ICS8701 l ow s kew 1, 2 c lock g enerator t able 5a. ac c haracteristics , v dd = v ddo = 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 f x a m y c n e u q e r f t u p n i m u m i x a m 0 5 2z h m t d p 1 e t o n ; y a l e d n o i t a g a p o r pz h m 0 f z h m 0 0 22 . 24 . 3s n t ) b ( k s7 , 2 e t o n ; w e k s k n a bt a e g d e g n i s i r n o d e r u s a e mv o d d 2 /0 0 2s p t ) o ( k s7 , 3 e t o n ; w e k s t u p t u ot a e g d e g n i s i r n o d e r u s a e mv o d d 2 /0 5 2s p t ( k sw) ; w e k s y c n e u q e r f e l p i t l u m 7 , 4 e t o n t a e g d e g n i s i r n o d e r u s a e mv o d d 2 /0 0 3s p t ) p p ( k s7 , 5 e t o n ; w e k s t r a p - o t - t r a pt a e g d e g n i s i r n o d e r u s a e mv o d d 2 /0 0 6s p t r 6 e t o n ; e m i t e s i r t u p t u o% 0 7 o t % 0 30 8 20 5 8s p t f 6 e t o n ; e m i t l l a f t u p t u o% 0 7 o t % 0 30 8 20 5 8s p c d oe l c y c y t u d t u p t u o z h m 0 f z h m 0 0 2 2 / e l c y c t 5 . 0 - 2 / e l c y c t 2 / e l c y c t 5 . 0 + s n z h m 0 0 2 = f25 . 23s n t n e ; e m i t e l b a n e t u p t u o 6 e t o n z h m 0 1 = f6s n t s i d ; e m i t e l b a s i d t u p t u o 6 e t o n z h m 0 1 = f6s n . e s i w r e h t o d e t o n s s e l n u z h m 0 0 2 t a d e r u s a e m s r e t e m a r a p l l a . t n i o p g n i s s o r c t u p t u o 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 : 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 f o k n a b a n i h t i w w e k s s a d e n i f e d : 2 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 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 e g a t l o v y l p p u s e m a s e h t h t i w y c n e u q e r f t n e r e f f i d t a g n i t a r e p o 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 : 4 e t o n . s n o i t i d n o c d a o l l a u q e d n a 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 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 t a w e k s e h t s a d e n i f e d : 5 e t o n . s t n i o p s s o r c e h t t a 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 . n o i t c u d o r p n i d e t s e t t o n . n o i t a z i r e t c a r a h c y b d e e t n a r a u g e r a s r e t e m a r a p e s e h t : 6 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 : 7 e t o n
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ICS8701 l ow s kew 1, 2 c lock g enerator t able 4c. p ower s upply dc c haracteristics , v dd = 3.3v5%, v ddo = 2.5v5%, t a = 0 c to 70 c t able 4d. lvcmos dc c haracteristics , v dd = 3.3v5%, v ddo = 2.5v5%, 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 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 t n e c s e i u q v d d v = h i v 5 6 4 . 3 = v l i v 0 = 5 9a 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 v h i t u p n i e g a t l o v h g i h , b l e s _ v i d , a l e s _ v i d , d l e s _ v i d , c l e s _ v i d , 1 n e _ k n a b , 0 n e _ k n a b e o / r m n 28 . 3v k l c28 . 3v v l i t u p n i e g a t l o v w o l , b l e s _ v i d , a l e s _ v i d , d l e s _ v i d , c l e s _ v i d , 1 n e _ k n a b , 0 n e _ k n a b e o / r m n v d d v 5 6 4 . 3 =3 . 0 -8 . 0v k l cv d d v 5 6 4 . 3 =3 . 0 -3 . 1v i h i t u p n i t n e r r u c h g i h , b l e s _ v i d , a l e s _ v i d , d l e s _ v i d , c l e s _ v i d , 1 n e _ k n a b , 0 n e _ k n a b e o / r m n v d d =v n i v 5 6 4 . 3 =5a k l cv d d =v n i v 5 6 4 . 3 =0 5 1a i l i t u p n i t n e r r u c w o l , b l e s _ v i d , a l e s _ v i d , d l e s _ v i d , c l e s _ v i d , 1 n e _ k n a b , 0 n e _ k n a b e o / r m n v d d , v 5 6 4 . 3 =v n i v 0 =0 5 1 -a k l cv d d , v 5 6 4 . 3 =v 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 v d d , v 5 3 1 . 3 = v o d d 5 7 3 . 2 = i h o a m 7 2 - = 8 . 1v v l o e g a t l o v w o l t u p t u o v d d , v 5 3 1 . 3 = v o d d 5 7 3 . 2 = i l o a m 7 2 = 5 . 0v
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ICS8701 l ow s kew 1, 2 c lock g enerator t able 5b. ac c haracteristics , v dd = 3.3v5%, v ddo = 2.5v5%, 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 x a m y c n e u q e r f t u p n i m u m i x a m 0 5 2z h m t d p 1 e t o n ; y a l e d n o i t a g a p o r pz h m 0 f z h m 0 0 26 . 26 . 3s n t ) b ( k s7 , 2 e t o n ; w e k s k n a bt a e g d e g n i s i r n o d e r u s a e mv o d d 2 /5 2 2s p t ) o ( k s7 , 3 e t o n ; w e k s t u p t u ot a e g d e g n i s i r n o d e r u s a e mv o d d 2 /0 5 2s p t ( k sw) ; w e k s y c n e u q e r f e l p i t l u m 7 , 4 e t o n t a e g d e g n i s i r n o d e r u s a e mv o d d 2 /0 0 3s p t ) p p ( k s7 , 5 e t o n ; w e k s t r a p - o t - t r a pt a e g d e g n i s i r n o d e r u s a e mv o d d 2 /0 0 6s p t r 6 e t o n ; e m i t e s i r t u p t u o% 0 7 o t % 0 30 8 20 5 8s p t f 6 e t o n ; e m i t l l a f t u p t u o% 0 7 o t % 0 30 8 20 5 8s p c d oe l c y c y t u d t u p t u o z h m 0 f z h m 0 0 2 2 / e l c y c t 5 . 0 - 2 / e l c y c t 2 / e l c y c t 5 . 0 + s n z h m 0 0 2 = f25 . 23s n t n e ; e m i t e l b a n e t u p t u o 6 e t o n z h m 0 1 = f6s n t s i d ; e m i t e l b a s i d t u p t u o 6 e t o n z h m 0 1 = f6s n . e s i w r e h t o d e t o n s s e l n u z h m 0 0 2 t a d e r u s a e m s r e t e m a r a p l l a . t n i o p g n i s s o r c t u p t u o 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 : 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 f o k n a b a n i h t i w w e k s s a d e n i f e d : 2 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 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 e g a t l o v y l p p u s e m a s e h t h t i w y c n e u q e r f t n e r e f f i d t a g n i t a r e p o 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 : 4 e t o n . s n o i t i d n o c d a o l l a u q e d n a 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 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 t a w e k s e h t s a d e n i f e d : 5 e t o n . s t n i o p s s o r c e h t t a 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 . n o i t c u d o r p n i d e t s e t t o n . n o i t a z i r e t c a r a h c y b d e e t n a r a u g e r a s r e t e m a r a p e s e h t : 6 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 : 7 e t o n
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ICS8701 l ow s kew 1, 2 c lock g enerator p arameter m easurement i nformation f igure 1a - 3.3v o utput l oad t est c ircuit scope qx lvcmos v dd = +1.65v v ddo = 1.65v v dd gnd = -1.65v v ddo f igure 1b - 2.5v o utput l oad t est c ircuit scope qx lvcmos v ddo = +1.25v v ddo gnd = -1.25v
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ICS8701 l ow s kew 1, 2 c lock g enerator f igure 2 - o utput s kew t sk(o) qx qy f igure 3 - p art - to -p art s kew qx qy part 1 part 2 t sk(pp)
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ICS8701 l ow s kew 1, 2 c lock g enerator f igure 4 - i nput and o utput r ise and f all t ime clock inputs and outputs 20% 80% 20% 80% t r t f v swing f igure 5 - p ropagation d elay t pd v cc /2 clk qax, qbx, qcx, qdx f igure 6 - odc & t p eriod pulse width t period t pw t period odc = clk, qax, qbx, qcx, qdx
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ICS8701 l ow s kew 1, 2 c lock g enerator p ower c onsiderations this section provides information on power dissipation and junction temperature for the ICS8701-01. equations and example calculations are also provided. 1. power dissipation. the total power dissipation for the ICS8701-01 is the sum of the core power plus the power dissipated in the load(s). the following is the power dissipation for v dd = 3.3v + 5% = 3.465v, which gives worst case results. note: please refer to section 3 for details on calculating power dissipated in the load. ? power (core) max = v dd_max * i dd_max = 3.465v * 95ma = 329.2mw ? power (outputs) max = 32mw/loaded output pair if all outputs are loaded, the total power is 20 * 32mw = 640mw total power _max (3.465v, with all outputs switching) = 329.2mw + 640mw = 969.2mw 2. junction temperature. junction temperature, tj, is the temperature at the junction of the bond wire and bond pad and directly affects the reliability of the device. the maximum recommended junction temperature for hiperclocks tm devices is 125 c. the equation for tj is as follows: tj = ja * pd_total + t a tj = junction temperature ja = junction-to-ambient thermal resistance pd_total = total device power dissipation (example calculation is in section 1 above) t a = ambient temperature in order to calculate junction temperature, the appropriate junction-to-ambient thermal resistance ja must be used . assuming a moderate air flow of 200 linear feet per minute and a multi-layer board, the appropriate value is 42.1 c/w per table 6 below. therefore, tj for an ambient temperature of 70 c with all outputs switching is: 70 c + 0.969w * 42.1 c/w = 110.8 c. this is well below the limit of 125 c this calculation is only an example. tj will obviously vary depending on the number of loaded outputs, supply voltage, air flow , and the type of board (single layer or multi-layer). ja by velocity (linear feet per minute) 0 200 500 single-layer pcb, jedec standard test boards 67.8 c/w 55.9 c/w 50.1 c/w multi-layer pcb, jedec standard test boards 47.9 c/w 42.1 c/w 39.4 c/w note: most modern pcb designs use multi-layered boards. the data in the second row pertains to most designs. table 6. thermal resistance ja for 48-pin lqfp, forced convection
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ICS8701 l ow s kew 1, 2 c lock g enerator 3. calculations and equations. the purpose of this section is to derive the power dissipated into the load. lvcmos output driver circuit and termination are shown in figure 7. t o calculate worst case power dissipation into the load, use the following equations which assume a 50 ? load, and a termination voltage of v dd - 2v. pd_h is power dissipation when the output drives high. pd_l is the power dissipation when the output drives low. pd_h = (v oh_max /r l ) * (v dd_max - v oh_max ) pd_l = (v ol_max /r l ) * (v dd_max - v ol_max ) for logic high, v out = v oh_max = v dd_max ? 1.2v for logic low, v out = v ol_max = v dd_max ? 0.4v pd_h = (1.2v/50 ? ) * (2v - 1.2v) = 19.2mw pd_l = (0.4v/50 ? ) * (2v - 0.4v) = 12.8mw total power dissipation per output pair = pd_h + pd_l = 32mw f igure 7 - lvcmos d river c ircuit and t ermination v ddo v out rl 50 ? q1
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ICS8701 l ow s kew 1, 2 c lock g enerator r eliability i nformation t ransistor c ount the transistor count for ICS8701 is: 1743 t able 7. vs . a ir f low t able ja by velocity (linear feet per minute) 0 200 500 single-layer pcb, jedec standard test boards 67.8 c/w 55.9 c/w 50.1 c/w multi-layer pcb, jedec standard test boards 47.9 c/w 42.1 c/w 39.4 c/w note: most modern pcb designs use multi-layered boards. the data in the second row pertains to most designs.
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ICS8701 l ow s kew 1, 2 c lock g enerator 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 q 0 - - 7 c c c - -- -8 0 . 0 p ackage o utline - y s uffix t able 8. p ackage d imensions reference document: jedec publication 95, ms-026
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ICS8701 l ow s kew 1, 2 c lock g enerator t able 9. o rdering i nformation 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 c 1 0 7 8 s c iy c 1 0 7 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 c 1 0 7 8 s c iy c 1 0 7 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 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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