View ICS8308I_4185882.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

low skew, 1-to-8 differential/ lvcmos-to-lvcmos fanout buffer ICS8308I idt ? / ics ? lvcmos fanout buffer 1 ics8308agi rev. b october 16, 2007 b lock d iagram p in a ssignment ICS8308I 24-lead, 173-mil tssop 4.4mm x 7.8mm x 0.925mm body package g package top view q0 gnd clk_sel lvcmos_clk clk nclk clk_en oe v dd gnd q1 v ddo v ddo q2 gnd q3 v ddo q4 gnd q5 v ddo q6 gnd q7 g eneral d escription the ICS8308I is a low-skew, 1-to-8 fanout buffer and a member of the hiperclocks ? family of high performance clock solutions from idt. the ICS8308I has two selectable clock inputs. the clk, nclk pair can accept most differential input levels. the lvcmos_clk can accept lvcmos or lvttl input levels. the low impedance lvcmos/lvttl outputs are designed to drive 50 series or parallel terminated transmission lines. the effective fanout can be increased from 8 to 16 by utilizing the ability of the outputs to drive two series terminated trans- mission lines. the ICS8308I is characterized for 3.3v core/3.3v output, 3.3v core/2.5v output or 2.5v core/2.5v output operation. guaranteed output and part-part skew characteristics make the 8308i ideal for those clock distribution applications requiring well defined performance and repeatability. f eatures ? eight lvcmos/lvttl outputs, (7 typical output impedance) ? selectable lvcmos_clk or differential clk, nclk inputs ? clk, nclk pair can accept the following differential input levels: lvpecl, lvds, lvhstl, sstl, hcsl ? maximum output frequency: 350mhz ? output skew: (3.3v 5%): 100ps (maximum) ? part to part skew: (3.3v 5%): 1ns (maximum) ? supply voltage modes: (core/output) 3.3v/3.3v 3.3v/2.5v 2.5v/2.5v ? -40 c to 85 c ambient operating temperature ? available in both standard (rohs 5) and lead-free (rohs 6) packages 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 q0 q1 q2 q3 q4 q5 q6 q7 lvcmos_clk clk nclk clk_sel clk_en oe d le q 1 0 pullup pullup pullup pulldown pullup pullup
idt ? / ics ? lvcmos fanout buffer 2 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer 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 1 , 3 1 , 1 1 , 1 3 2 , 1 2 , 9 1 , 7 1 , 6 q , 7 q , 1 q , 0 q 2 q , 3 q , 4 q , 5 q 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 . s t u p t u o k c o l c 2 2 , 8 1 , 4 1 , 0 1 , 2d n gr e w o p. d n u o r g y l p p u s r e w o p 3l e s _ k l ct u p n ip u l l u p . h g i h n e h w t u p n i k c o l c s o m c v l s t c e l e s . t u p n i t c e l e s k c o l c . a 3 e l b a t e e s . w o l n e h w s t u p n i k l c n , k l c s t c e l 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 4k l c _ s o m c v lt u p n ip u l l u p. 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 n i k c o l c 5k l ct 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 - n o n 6k l c nt 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 7n e _ k l ct u p n ip u l l u p. 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 . e l b a n e k c o l c 8e ot u p n ip u l l u p . 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 . e l b a n e t u p t u o . b 3 e l b a t e e s 9v d d r e w o p. n i p y l p p u s e r o c 4 2 , 0 2 , 6 1 , 2 1v o d d r e w o p. s n i p y l p p u s t u p t u o : 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 t able 2. p in c haracteristics t able 3a. c lock s elect f unction t able t able 3c. c lock i nput f unction t able t u p n i l o r t n o c t u p n i k c o l c l e s _ k l c 0d e t c e l e s s i k l c n , k l c 1d e t c e l e s s i k l c _ s o m c v l 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 l e s _ k l ck l c _ s o m c v lk l ck l c n7 q : 0 q 0? 0 1 w o ld e d n e e l g n i s 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 0? 1 0 h g i hd e d n e e l g n i s 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 0? 0 1 e t o n ; d e s a i bw o ld e d n e e l g n i s o t d e d n e e l g n i sg n i t r e v n i n o n 0? 1 1 e t o n ; d e s a i bh g i hd e d n e e l g n i s o t d e d n e e l g n i sg n i t r e v n i n o n 0? 1 e t o n ; d e s a i b0h g i hd e d n e e l g n i s o t d e d n e e l g n i sg n i t r e v n i 0? 1 e t o n ; d e s a i b1w o ld e d n e e l g n i s o t d e d n e e l g n i sg n i t r e v n i 10 ? ? w o ld e d n e e l g n i s 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 ? ? h g i hd e d n e e l g n i s o t d e d n e e l g n i sg n i t r e v n i n o n . " s l e v e l d e d n e e l g n i s t p e c c a o t t u p n i l a i t n e r e f f i d e h t g n i r i w " , n o i t c e s n o i t a m r o f n i n o i t a c i l p p a e h t o t r e f e r e s a e l p : 1 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 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 ( 2 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 o572 1 t able 3b. oe s elect f unction t able t u p n i l o r t n o c n o i t a r e p o t u p t u o e o 0) d e l b a s i d ( z - i h n i e r a 7 q : 0 q s t u p t u o 1) d e l b a n e ( e v i t c a e r a 7 q : 0 q s t u p t u o
idt ? / ics ? lvcmos fanout buffer 3 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer t able 4a. p ower s upply dc c haracteristics , v dd = v ddo = 3.3v5%, t a = -40 to 85 a bsolute m aximum r atings supply voltage, v dd 4.6v inputs, v i -0.5v to v dd + 0.5 v outputs, v o -0.5v to v ddo + 0.5v 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 op- eration 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 ex- tended 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 d d 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 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 6 4a 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 4b. p ower s upply dc c haracteristics , v dd = 3.3v5%, v ddo = 2.5v5%, t a = -40 to 85 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 r o c 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 6 4a m i o d d t n e r r u c y l p p u s t u p t u o 0 1a m t able 4c. p ower s upply dc c haracteristics , v dd , v ddo = 2.5v5%, t a = -40 to 85 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 r o c 5 7 3 . 25 . 25 2 6 . 2v 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 3 4a m i o d d t n e r r u c y l p p u s t u p t u o 0 1a m
idt ? / ics ? lvcmos fanout buffer 4 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer t able 4d. dc c haracteristics , v dd = v ddo = 3.3v5%, t a = -40 to 85 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 is o m c v l2v d d 3 . 0 +v v l i e g a t l o v w o l t u p n i k l c _ s o m c v l3 . 0 -3 . 1v e o , n e _ k l c8 . 08 . 0 i n i t n e r r u c t u p n i v n i v = d d r o v n i d n g = 0 0 3a v h o 1 e t o n ; e g a t l o v h g i h t u p t u oi h o a m 4 2 - =4 . 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 i l o a m 4 2 =5 5 . 0v i l o a m 2 1 =0 3 . 0v v p p e g a t l o v t u p n i k a e p - o t - k a e pk l c n , k l c5 1 . 03 . 1v v r m c ; e g a t l o v e d o m n o m m o c t u p n i 3 , 2 e t o n k l c n , k l c5 . 0 + d n gv d d 5 8 . 0 -v 0 5 g n i v i r d f o e l b a p a c s t u p t u o : 1 e t o n 0 5 h t i w d e t a n i m r e t s e n i l n o i s s i m s n a r t v o t o d d . 2 / . " t i u c r i c t s e t c a 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 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 v d d . v 3 . 0 + 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 : 3 e t o nv h i . t able 4e. dc c haracteristics , v dd = 3.3v5%, v ddo = 2.5v5%, t a = -40 to 85 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 is o m c v l2v d d 3 . 0 +v v l i e g a t l o v w o l t u p n i k l c _ s o m c v l3 . 0 -3 . 1v e o , n e _ k l c8 . 0v i n i t n e r r u c t u p n i v n i v = d d r o v n i d n g = 0 0 3a v h o 1 e t o n ; e g a t l o v h g i h t u p t u oi h o a m 5 1 - =8 . 1v v l o 1 e t o n ; e g a t l o v w o l t u p t u oi l o a m 5 1 =6 . 0v v p p e g a t l o v t u p n i k a e p - o t - k a e pk l c n , k l c5 1 . 03 . 1v v r m c ; e g a t l o v e d o m n o m m o c t u p n i 3 , 2 e t o n k l c n , k l c5 . 0 + d n gv d d 5 8 . 0 -v 0 5 g n i v i r d f o e l b a p a c s t u p t u o : 1 e t o n 0 5 h t i w d e t a n i m r e t s e n i l n o i s s i m s n a r t v o t o d d . 2 / . " t i u c r i c t s e t c a 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 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 v d d . v 3 . 0 + 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 : 3 e t o nv h i .
idt ? / ics ? lvcmos fanout buffer 5 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer t able 4f. dc c haracteristics , v dd , v ddo = 2.5v5%, t a = -40 to 85 t able 5a. ac c haracteristics , v dd = v ddo = 3.3v5%, t a = -40 to 85 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 is o m c v l2v d d 3 . 0 +v v l i e g a t l o v w o l t u p n i k l c _ s o m c v l3 . 0 -3 . 1v e o , n e _ k l c7 . 0v i n i t n e r r u c t u p n i v n i v = d d r o v n i d n g = 0 0 3a v h o 1 e t o n ; e g a t l o v h g i h t u p t u oi h o a m 5 1 - =8 . 1v v l o 1 e t o n ; e g a t l o v w o l t u p t u oi l o a m 5 1 =6 . 0v v p p e g a t l o v t u p n i k a e p - o t - k a e pk l c n , k l c5 1 . 03 . 1v v r m c ; e g a t l o v e d o m n o m m o c t u p n i 3 , 2 e t o n k l c n , k l c5 . 0 + d n gv d d 5 8 . 0 -v 0 5 g n i v i r d f o e l b a p a c s t u p t u o : 1 e t o n 0 5 h t i w d e t a n i m r e t s e n i l n o i s s i m s n a r t v o t o d d . 2 / . " t i u c r i c t s e t c a 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 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 v d d . v 3 . 0 + 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 : 3 e t o nv h i . 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 0 5 3z h m t d p n o i t a g a p o r p ; y a l e d ; k l c n , k l c 1 e t o n ? z h m 0 5 324s n ; k l c _ s o m c v l 2 e t o n ? z h m 0 5 324s n t ) o ( k s7 , 3 e t o n ; w e k s t u p t u o n o d e r u s a e m v @ e g d e g n i s i r o d d 2 / 0 0 1s p t ) p p ( k s7 , 4 e t o n ; w e k s t r a p - o t - t r a p n o d e r u s a e m v @ e g d e g n i s i r o d d 2 / 1s n t r t / f e m i t l l a f / e s i r t u p t u ov 2 o t v 8 . 02 . 01s n c d oe l c y c y t u d t u p t u o? k l c n , k l c = f e r , z h m 0 5 15 45 5% t l z p t , h z p 5 e t o n ; e m i t e l b a n e t u p t u o 5s n t z l p t , z h p 5 e t o n ; e m i t e l b a s i d t u p t u o 5s n t s e l b a n e k c o l c ; e m i t p u t e s 6 e t o n o t n e _ k l c k l c n , k l c 1s n o t n e _ k l c k l c _ s o m c v l 0s n t h e l b a n e k c o l c ; e m i t d l o h 6 e t o n o t k l c n , k l c n e _ k l c 0s n k l c _ s o m c v l n e _ k l c o t 1s n o t t n i o p g n i s s o r c t u p n i l a i t n e r e f f i d e h t m o r f d e r u s a e m : 1 e t o nv o d d 2 /. t u p t u o e h t f o v m o r f d e r u s a e m : 2 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 : 3 e t o n v t a d e r u s a e m o d d . 2 / 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 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 : 4 e t o n v 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 o d d . 2 / . 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 : 5 e t o n . k c o l c t u p n i e h t f o e g d e g n i s i r e h t o t e v i t a l e r e r a s e m i t d l o h d n a p u t e s : 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
idt ? / ics ? lvcmos fanout buffer 6 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer t able 5b. ac c haracteristics , v dd = 3.3v5%, v ddo = 2.5v5%, t a = -40 to 85 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 0 5 3z h m t d p n o i t a g a p o r p ; y a l e d ; k l c n , k l c 1 e t o n ? z h m 0 5 324s n ; k l c _ s o m c v l 2 e t o n ? z h m 0 5 324s n t ) o ( k s7 , 3 e t o n ; w e k s t u p t u o n o d e r u s a e m v @ e g d e g n i s i r o d d 2 / 0 0 1s p t ) p p ( k s7 , 4 e t o n ; w e k s t r a p - o t - t r a p n o d e r u s a e m v @ e g d e g n i s i r o d d 2 / 1s n t r t / f e m i t l l a f / e s i r t u p t u ov 8 . 1 o t v 6 . 02 . 00 . 1s n c d oe l c y c y t u d t u p t u o? k l c n , k l c = f e r , z h m 0 5 15 45 5% t l z p t , h z p 5 e t o n ; e m i t e l b a n e t u p t u o 5s n t z l p t , z h p 5 e t o n ; e m i t e l b a s i d t u p t u o 5s n t s e l b a n e k c o l c ; e m i t p u t e s 6 e t o n o t n e _ k l c k l c n , k l c 1s n o t n e _ k l c k l c _ s o m c v l 0s n t h e l b a n e k c o l c ; e m i t d l o h 6 e t o n o t k l c n , k l c n e _ k l c 0s n k l c _ s o m c v l n e _ k l c o t 1s n o t t n i o p g n i s s o r c t u p n i l a i t n e r e f f i d e h t m o r f d e r u s a e m : 1 e t o nv o d d 2 /. t u p t u o e h t f o v m o r f d e r u s a e m : 2 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 : 3 e t o n v t a d e r u s a e m o d d . 2 / 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 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 : 4 e t o n v 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 o d d . 2 / . 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 : 5 e t o n . k c o l c t u p n i e h t f o e g d e g n i s i r e h t o t e v i t a l e r e r a s e m i t d l o h d n a p u t e s : 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
idt ? / ics ? lvcmos fanout buffer 7 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer t able 5c. ac c haracteristics , v dd = v ddo = 2.5v5%, t a = -40 to 85 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 0 5 3z h m t d p n o i t a g a p o r p ; y a l e d ; k l c n , k l c 1 e t o n ? z h m 0 5 35 . 12 . 4s n ; k l c _ s o m c v l 2 e t o n ? z h m 0 5 37 . 14 . 4s n t ) o ( k s7 , 3 e t o n ; w e k s t u p t u o n o d e r u s a e m v @ e g d e g n i s i r o d d 2 / 0 6 1s p t ) p p ( k s7 , 4 e t o n ; w e k s t r a p - o t - t r a p n o d e r u s a e m v @ e g d e g n i s i r o d d 2 / 2s n t r t / f e m i t l l a f / e s i r t u p t u ov 8 . 1 o t v 6 . 02 . 00 . 1s n c d oe l c y c y t u d t u p t u o? k l c n , k l c = f e r , z h m 0 5 10 40 6% t l z p t , h z p 5 e t o n ; e m i t e l b a n e t u p t u o 5s n t z l p t , z h p 5 e t o n ; e m i t e l b a s i d t u p t u o 5s n t s e l b a n e k c o l c ; e m i t p u t e s 6 e t o n o t n e _ k l c k l c n , k l c 1s n o t n e _ k l c k l c _ s o m c v l 0s n t h e l b a n e k c o l c ; e m i t d l o h 6 e t o n o t k l c n , k l c n e _ k l c 0s n k l c _ s o m c v l n e _ k l c o t 1s n o t t n i o p g n i s s o r c t u p n i l a i t n e r e f f i d e h t m o r f d e r u s a e m : 1 e t o nv o d d 2 /. t u p t u o e h t f o v m o r f d e r u s a e m : 2 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 : 3 e t o n v t a d e r u s a e m o d d . 2 / 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 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 : 4 e t o n v 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 o d d . 2 / . 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 : 5 e t o n . k c o l c t u p n i e h t f o e g d e g n i s i r e h t o t e v i t a l e r e r a s e m i t d l o h d n a p u t e s : 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
idt ? / ics ? lvcmos fanout buffer 8 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer p arameter m easurement i nformation v cmr cross points v pp nclk clk gnd v dd qx qy t sk(o) v ddo 2 v ddo 2 qx qy pa rt 1 pa rt 2 t sk(pp) v ddo 2 v ddo 2 2.5v c ore /2.5v o utput l oad ac t est c ircuit 3.3v c ore /2.5v o utput l oad ac t est c ircuit 3.3v c ore /3.3v o utput l oad ac t est c ircuit scope qx lvcmos gnd 1.65v5% -1.65v5% d ifferential i nput l evel o utput s kew p art - to -p art s kew scope qx lvcmos gnd 2.05v5% -1.25v5% v dd , v ddo v dd scope qx lvcmos gnd 1.25v5% -1.25v5% v dd , v ddo v ddo 1.25v5%
idt ? / ics ? lvcmos fanout buffer 9 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer o utput r ise /f all t ime p ropagation d elay nclk clk q0:q7 t pd v ddo 2 ? ? v ddo 2 lvcmos_ clk clock outputs 0.8v 2v 2v 0.8v t r t f clock outputs 0.6v 1.8v 1.8v 0.6v t r t f v dd = v ddo = 3.3v v dd = v ddo = 2.5v or v dd = 3.3v, v ddo = 2.5v o utput d uty c ycle /p ulse w idth /p eriod q0:q7 t period t pw t period odc = v ddo 2 x 100% t pw
idt ? / ics ? lvcmos fanout buffer 10 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer a pplication i nformation figure 1 shows how the differential input can be wired to accept single ended levels. the reference voltage v_ref = v dd /2 is generated by the bias resistors r1, r2 and c1. this bias circuit should be located as close as possible to the input pin. the ratio f igure 1. s ingle e nded s ignal d riving d ifferential i nput of r1 and r2 might need to be adjusted to position the v_ref in the center of the input voltage swing. for example, if the input clock swing is only 2.5v and v dd = 3.3v, v_ref should be 1.25v and r2/r1 = 0.609. w iring the d ifferential i nput to a ccept s ingle e nded l evels v_ref r1 1k c1 0.1u r2 1k single ended clock input clk nclk vdd i nputs : clk i nput for applications not requiring the use of the test clock, it can be left floating. though not required, but for additional protection, a 1k resistor can be tied from the clk input to ground. clk/nclk i nputs for applications not requiring the use of the differential input, both clk and nclk can be left floating. though not required, but for additional protection, a 1k resistor can be tied from clk to ground. lvcmos c ontrol p ins all control pins have internal pull-ups or pull-downs; additional resistance is not required but can be added for additional protection. a 1k resistor can be used. r ecommendations for u nused i nput and o utput p ins o utputs : lvcmos o utputs all unused lvcmos output can be left floating. there should be no trace attached.
idt ? / ics ? lvcmos fanout buffer 11 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer f igure 2c. h i p er c lock s clk/nclk i nput d riven by 3.3v lvpecl d river f igure 2b. h i p er c lock s clk/nclk i nput d riven by 3.3v lvpecl d river f igure 2d. h i p er c lock s clk/nclk i nput d riven by 3.3v lvds d river 3.3v r1 50 r3 50 zo = 50 ohm lvpecl zo = 50 ohm hiperclocks clk nclk 3.3v input r2 50 zo = 50 ohm input hiperclocks clk nclk 3.3v r3 125 r2 84 zo = 50 ohm 3.3v r4 125 lvpecl r1 84 3.3v d ifferential c lock i nput i nterface the clk /nclk accepts lvds, lvpecl, lvhstl, sstl, hcsl and other differential signals. both v swing and v oh must meet the v pp and v cmr input requirements. figures 2a to 2e show interface examples for the hiperclocks clk/nclk input driven by the most common driver types. the input interfaces suggested here are f igure 2a. h i p er c lock s clk/nclk i nput d riven by ics h i p er c lock s lvhstl d river examples only. please consult with the vendor of the driver component to confirm the driver termination requirements. for example in figure 2a, the input termination applies for ics hiperclocks lvhstl drivers. if you are using an lvhstl driver from another vendor, use their termination recommendation. 1.8v r2 50 input lvhstl driver ics hiperclocks r1 50 lvhstl 3.3v zo = 50 ohm zo = 50 ohm hiperclocks clk nclk f igure 2e. h i p er c lock s clk/nclk i nput d riven by 3.3v lvpecl d river with ac c ouple zo = 50 ohm r3 125 hiperclocks clk nclk 3.3v r5 100 - 200 3.3v r2 84 3.3v r6 100 - 200 input r5,r6 locate near the driver pin. zo = 50 ohm r1 84 r4 125 c2 lvpecl c1 zo = 50 ohm r1 100 3.3v lvds_driv er zo = 50 ohm receiv er clk nclk 3.3v
idt ? / ics ? lvcmos fanout buffer 12 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer s chematic e xample figure 3 shows a schematic example of the ICS8308I. in this example, the lvcmos_clk input is selected. the decoupling f igure 3. ICS8308I lvpecl b uffer s chematic e xample c4 0.1u (u1,9) r1 43 vdd zo = 50 ohm zo = 50 ohm (u1,16) r10 1k r11 43 c2 0.1u c3 0.1u vdd (u1,20) u1 ICS8308I 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 q0 gnd clk_sel lvcmos_clk clk nclk clk_en oe vdd gnd q1 vddo q7 gnd q6 vddo q5 gnd q4 vddo q3 gnd q2 vddo vdd=3.3v r9 1k (u1,12) r8 43 ro ~ 7 ohm 3.3v_lvcmos 3.3v lvcmos/lvttl c5 0.1u r12 1k vdd (u1,24) zo = 50 ohm vdd vdd 3.3v lvcmos/lvttl c1 0.1u capacitors should be physically located near the power pin. r eliability i nformation t ransistor c ount the transistor count for ICS8308I is: 1040 t able 6. ja vs . a ir f low t able for 24 l ead tssop ja by velocity (linear feet per minute) 0 200 500 multi-layer pcb, jedec standard test boards 70c/w 63c/w 60c/w
idt ? / ics ? lvcmos fanout buffer 13 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer p ackage o utline - g s uffix for 24 l ead tssop t able 7. p ackage d imensions r eference d ocument : jedec p ublication 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
idt ? / ics ? lvcmos fanout buffer 14 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer while the information presented herein has been checked for both accuracy and reliability, integrated device technology, incorp orated (idt) 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 l icenses 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 r equirements are not recommended without additional processing by idt. idt reserves the right to change any circuitry or specifications without notice. idt does not authorize or warrant any idt product for use in life support devices or critical medical instruments. t able 8. 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 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 i g a 8 0 3 8 s c ii g a 8 0 3 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 i g a 8 0 3 8 s c ii g a 8 0 3 8 s c ip o s s t d a e l 4 2l e e r & e p a tc 5 8 o t c 0 4 - f l i g a 8 0 3 8 s c if l i g a 8 0 3 8 s c ip o s s t " e e r f - d a e l " d a e l 4 2e b u tc 5 8 o t c 0 4 - t f l i g a 8 0 3 8 s c if l i g a 8 0 3 8 s c ip o s s t " e e r f - d a e l " d a e l 4 2l e e r & e p a tc 5 8 o t c 0 4 - . t n a i l p m o c s h o r e r a d n a n o t i a r u g i f n o c e e r f - b p e h t e r a r e b m u n t r a p e h t o t x i f f u s " f l " n a h t i w d e r e d r o e r a t a h t s t r a p : e t o n
idt ? / ics ? lvcmos fanout buffer 15 ics8308agi rev. b october 16, 2007 ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer 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 a1 1t u o y a l c i t a m e h c s d e d d a 4 0 / 6 1 / 4 b b 4 t e 4 t b 5 t 1 3 4 6 8 . t e l l u b e g a t l o v y l p p u s x i m d e d d a - n o i t c e s s e r u t a e f . e l b a t y l p p u s r e w o p x i m 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 x i m 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 a x i m d e d d a . m a r g a i d t i u c r i c t s e t c a d a o l t u p t u o x i m d e d d a 4 0 / 0 2 / 0 1 b8 t4 1. r e b m u n t r a p " e e r f - d a e l " d e d d a - e l b a t n o i t a m r o f n i g n i r e d r o 5 0 / 2 1 / 1 b 8 t 1 0 1 4 1 . l e s _ k l c d e d d a , m a r g a i d k c o l b d e t c e r r o c . " s n i p t u p t u o d n a t u p n i d e s u n u r o f s n o i t a d n e m m o c e r " d e d d a . e t o n e e r f - d a e l d e d d a - e l b a t n o i t a m r o f n i g n i r e d r o 5 0 / 5 2 / 7 b 1 . l i m - 3 7 1 o t l i m - 0 0 3 m o r f n o i t a m r o f n i e g a k c a p d e t c e r r o c - t n e m n g i s s a n i p 6 0 / 4 / 8 bb 3 t2 . e l b a t n o i t c n u f t c e l e s e o d e d d a 7 0 / 6 1 / 0 1
innovate with idt and accelerate your future networks. contact: www.idt.com for sales 800-345-7015 408-284-8200 fax: 408-284-2775 for tech support netcom@idt.com 480-763-2056 corporate headquarters integrated device t echnology, inc. 6024 silver creek valley road san jose, ca 95138 united states 800 345 7015 +408 284 8200 (outside u.s.) asia pacific and japan integrated device technology singapore (1997) pte. ltd. reg. no. 199707558g 435 orchard road #20-03 wisma atria singapore 238877 +65 6 887 5505 europe idt europe, limited 321 kingston road leatherhead, surrey kt22 7tu england +44 (0) 1372 363 339 fax: +44 (0) 1372 378851 ? 2007 integrated device technology, inc. all rights reserved. product specifications subject to change without notice. idt, th e idt logo, ics and hiperclocks are trademarks of integrated device technology, inc. accelerated thinking is a service mark of integrated device technology, inc. all other br ands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. printed in usa ICS8308I low skew, 1-to-8 differential/lvcmos-to-lvcmos fanout buffer

▲Up To Search▲

Price & Availability of ICS8308I

	To Download ICS8308I Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .