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ics83940ag-02 revision a september 3, 2010 1 ? 2010 integrated device technology, inc. low skew, 1-to-4, crystal-to-lvcmos/ lvttl fanout buffer ics83904-02 data sheet f eatures ? four lvcmos/lvttl outputs, 19 typical output impedance @ v dd = v ddo = 3.3v ? two crystal oscillator input pairs one lvcmos/lvttl clock input ? crystal input frequencry range: 12mhz ? 38.88mhz ? output frequency: 200mhz (maximum) ? output skew: 40ps (maximum) @ v dd = v ddo = 3.3v ? rms phase jitter @ 25mhz output, using a 25mhz crystal (100hz ? 1mhz): 0.16ps (typical) @ v dd = v ddo = 3.3v ? rms phase noise at 25mhz: offset noise p o w er 100hz ............. -118.4 dbc/hz 1khz ............. -141.5 dbc/hz 10khz ......... .... -157.2 dbc/hz 100khz ......... .... -157.2 dbc/hz ? supply voltage modes: (core/output) 3.3v/3.3v 3.3v/2.5v 3.3v/1.8v 2.5v/2.5v 2.5v/1.8v ? 0 c to 70 c ambient operating temperature ? available in both standard (rohs 5) and lead-free (rohs 6) packages g eneral d escription the ics83904-02 is a low skew, high performance 1-to-4 crystal- to-lvcmos fanout buffer. the ics83904-02 has selectable single-ended clock or two crystal-oscillator inputs. there is an output enable to disable the outputs by placing them into a high- impedance state. guaranteed output and part-to-part skew characteristics make the ics83904-02 ideal for those applications demand- ing well defined performance and repeatability. b lock d iagram oe clk_sel0 clk_sel1 clk q0 q1 q2 q3 osc osc 0 0 0 1 1 0 1 1 pullup ics83904-02 16-lead tssop 4.4mm x 5.0mm x 0.92mm package body g package top view pulldown pulldown xtal_in0 xtal_out0 xtal_in1 xtal_out1 pulldown clk_sel0 xtal_out0 xtal_in0 v dd xtal_in1 xtal_out1 clk_sel1 clk 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 v ddo q0 q1 gnd q2 q3 v ddo oe p in a ssignment
ics83940ag-02 revision a september 3, 2010 2 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer 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 7 , 1 , 0 l e s _ k l c 1 l e s _ k l c t u p n in w o d l l u p . e l b a t n o i t c n u f e c n e r e f e r t u p n i , 3 e l b a t e e s . s t u p n i t c e l e s k c o l c . 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 3 , 2 , 0 t u o _ l a t x 0 n i _ l a t x t u p n i . t u p n i e h t s i 0 n i _ l a t x . e c a f r e t n i r o t a l l i c s o l a t s y r c . t u p t u o e h t s i 0 t u o _ l a t x 4v d d r e w o p. n i p y l p p u s e v i t i s o p 6 , 5 , 1 n i _ l a t x 1 t u o _ l a t x t u p n i . t u p n i e h t s i 1 n i _ l a t x . e c a f r e t n i r o t a l l i c s o l a t s y r c . t u p t u o e h t s i 1 t u o _ l a t x 8k l ct u p n in w o d 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 d e d n e - e l g n i s 9e ot u p n ip u l l u p . e t a t s e c n a d e p m i h g i h n i e r a s t u p t u o , w o l n e h w . e l b a n e 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 . e v i t c a e r a s t u p t u o , h g i h n e h w 6 1 , 0 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 5 1 , 4 1 , 2 1 , 1 10 q , 1 q , 2 q , 3 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 . s t u p t u o k c o l c d e d n e - e l g n i s 3 1d n gr e w o p. d n u o r g y l p p u s r e w o p : 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 3. i nput r eference 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 4f 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 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 o d d v 5 6 4 . 3 =8f p v o d d v 5 2 6 . 2 =7f p v o d d v 0 . 2 =7f p r t u o e c n a d e p m i t u p t u o v o d d v 3 . 3 =9 1 v o d d v 5 . 2 =1 2 v o d d v 8 . 1 =2 3 s t u p n i l o r t n o c e c n e r e f e r 1 l e s _ k l c0 l e s _ k l c 00 ) t l u a f e d ( 0 l a t x 01 1 l a t x 10 k l c 11 k l c
ics83940ag-02 revision a september 3, 2010 3 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer 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 100.3c/w (0 mps) 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. t able 4a. p ower s upply dc c haracteristics , v dd = v ddo = 3.3v5%, t a = 0c to 70c t able 4d. p ower s upply dc c haracteristics , v dd = v ddo = 2.5v5%, t a = 0c to 70c t able 4b. p ower s upply dc c haracteristics , v dd = 3.3v5%, v ddo = 2.5v5%, t a = 0c to 70c t able 4c. p ower s upply dc c haracteristics , v dd = 3.3v5%, v ddo = 1.8v0.2v, t a = 0c to 70c 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 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 z h m 2 1 @ d e t c e l e s x l a t x & d a o l o n7a m d e t c e l e s k l c & d a o l o n1a m i o d d t n e r r u c y l p p u s t u p t u od e t c e l e s k l c & d a o l o n1a 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 d d e g a t l o v y l p p u s r e w 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 z h m 2 1 @ d e t c e l e s x l a t x & d a o l o n7a m d e t c e l e s k l c & d a o l o n1a m i o d d t n e r r u c y l p p u s t u p t u od e t c e l e s k l c & d a o l o n1a 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 d d e g a t l o v y l p p u s r e w 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 6 . 18 . 10 . 2v i d d t n e r r u c y l p p u s r e w o p z h m 2 1 @ d e t c e l e s x l a t x & d a o l o n7a m d e t c e l e s k l c & d a o l o n1a m i o d d t n e r r u c y l p p u s t u p t u od e t c e l e s k l c & d a o l o n1a 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 d d e g a t l o v y l p p u s r e w o p 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 z h m 2 1 @ d e t c e l e s x l a t x & d a o l o n3a m d e t c e l e s k l c & d a o l o n1a m i o d d t n e r r u c y l p p u s t u p t u od e t c e l e s k l c & d a o l o n1a m
ics83940ag-02 revision a september 3, 2010 4 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer t able 4f. dc c haracteristics , t a = 0c to 70c 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 v d d % 5 v 3 . 3 =2 . 2v d d 3 . 0 +v v d d % 5 v 5 . 2 =6 . 1v d d 3 . 0 +v v l i e g a t l o v w o l t u p n i v d d % 5 v 3 . 3 =3 . 0 -3 . 1v v d d % 5 v 5 . 2 =3 . 0 -9 . 0v i h i t n e r r u c h g i h t u p n i , k l c 1 : 0 l e s _ k l c v d d % 5 v 5 . 2 r o v 3 . 3 =0 5 1a e ov d d % 5 v 5 . 2 r o v 3 . 3 =5a i l i t n e r r u c w o l t u p n i , k l c 1 : 0 l e s _ k l c v d d % 5 v 5 . 2 r o v 3 . 3 =5 -a e ov d d % 5 v 5 . 2 r o v 3 . 3 =0 5 1 -a v h o h g i h t u p t u oe g a t l o v v o d d 1 e t o n ; % 5 v 3 . 3 =6 . 2v v o d d 1 e t o n ; % 5 v 5 . 2 =8 . 1v v o d d 1 e t o n ; v 2 . 0 v 8 . 1 =2 . 1v v l o e g a t l o v w o l t u p t u o v o d d 1 e t o n ; % 5 v 3 . 3 =6 . 0v v o d d 1 e t o n ; % 5 v 5 . 2 =5 . 0v v o d d 1 e t o n ; v 2 . 0 v 8 . 1 =4 . 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 . s m a r g a i d " t i u c r i c t s e t d a o l " , 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 able 5. c rystal c haracteristics 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 2 18 8 . 8 3z 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 t able 4e. p ower s upply dc c haracteristics , v dd = 2.5v5%, v ddo = 1.8v0.2v, t a = 0c to 70c 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 p 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 6 . 18 . 10 . 2v i d d t n e r r u c y l p p u s r e w o p z h m 2 1 @ d e t c e l e s x l a t x & d a o l o n3a m d e t c e l e s k l c & d a o l o n1a m i o d d t n e r r u c y l p p u s t u p t u od e t c e l e s k l c & d a o l o n1a m
ics83940ag-02 revision a september 3, 2010 5 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer t able 6b. ac c haracteristics , v dd = 3.3v 5%, v ddo = 2.5v 5%, t a = 0c to 70c t able 6a. ac c haracteristics , v dd = v ddo = 3.3v 5%, t a = 0c to 70c 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 l a t x l a n r e t x e / w2 18 8 . 8 3z h m k l c l a n r e t x e / w 0 0 2z h m p t h l ; 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 1 e t o n 4 . 19 . 14 . 2s n t ) o ( k s2 e t o n ; w e k s t u p t u o 0 4s p t ) p p ( k s3 , 2 e t o n ; w e k s t r a p - o t - t r a p 0 0 7s 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 4 , 2 e t o n : e g n a r n o i t a r g e t n i , z h m 5 2 z h m 1 ? z h 0 0 1 6 1 . 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 10 0 8s p c d o t u p t u o e l c y c y t u d l a t x l a n r e t x e / w5 45 5% k l c l a n r e t x e / wz h m 0 5 1 < ?6 44 5% t n e 5 e t o n ; e m i t e l b a n e t u p t u o 0 1s n t s i d 5 e t o n ; e m i t e l b a s i d t u p t u o 0 1s n 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 / . 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 : 2 e t o n d n a s e g a t l o v y l p p u s e m a s e h 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 v t a d e r u s a e m s i t u p t u o e h t , e c i v e d h c a e n o 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 o d d . 2 / . d e s u e c r u o s t u p n i e h t n o t n e d n e p e d s i r e t t i j e s a h p : 4 e t o n . 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 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 l a t x l a n r e t x e / w2 18 8 . 8 3z h m k l c l a n r e t x e / w 0 0 2z h m p t h l ; 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 1 e t o n 5 . 10 . 25 . 2s n t ) o ( k s2 e t o n ; w e k s t u p t u o 0 4s p t ) p p ( k s3 , 2 e t o n ; w e k s t r a p - o t - t r a p 0 0 7s 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 4 , 2 e t o n : e g n a r n o i t a r g e t n i , z h m 5 2 z h m 1 - z h 0 0 1 6 1 . 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 10 0 8s p c d o t u p t u o e l c y c y t u d l a t x l a n r e t x e / w5 45 5% k l c l a n r e t x e / wz h m 0 5 1 < ?6 44 5% t n e 5 e t o n ; e m i t e l b a n e t u p t u o 0 1s n t s i d 5 e t o n ; e m i t e l b a s i d t u p t u o 0 1s n 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 / . 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 : 2 e t o n d n a s e g a t l o v y l p p u s e m a s e h 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 v t a d e r u s a e m s i t u p t u o e h t , e c i v e d h c a e n o 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 o d d . 2 / . d e s u e c r u o s t u p n i e h t n o t n e d n e p e d s i r e t t i j e s a h p : 4 e t o n . 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
ics83940ag-02 revision a september 3, 2010 6 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer t able 6d. ac c haracteristics , v dd = v ddo = 2.5v 5%, t a = 0c to 70c t able 6c. ac c haracteristics , v dd = 3.3v 5%, v ddo = 1.8v0.2v, t a = 0c to 70c 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 l a t x l a n r e t x e / w2 18 8 . 8 3z h m k l c l a n r e t x e / w 0 0 2z h m p t h l ; 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 1 e t o n 7 . 12 . 27 . 2s n t ) o ( k s2 e t o n ; w e k s t u p t u o 0 4s p t ) p p ( k s3 , 2 e t o n ; w e k s t r a p - o t - t r a p 0 0 7s 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 4 , 2 e t o n : e g n a r n o i t a r g e t n i , z h m 5 2 z h m 1 - z h 0 0 1 6 1 . 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 10 0 0 1s p c d o t u p t u o e l c y c y t u d l a t x l a n r e t x e / w5 45 5% k l c l a n r e t x e / wz h m 0 5 1 < ?6 44 5% t n e 5 e t o n ; e m i t e l b a n e t u p t u o 0 1s n t s i d 5 e t o n ; e m i t e l b a s i d t u p t u o 0 1s n 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 / . 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 : 2 e t o n d n a s e g a t l o v y l p p u s e m a s e h 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 v t a d e r u s a e m s i t u p t u o e h t , e c i v e d h c a e n o 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 o d d . 2 / . d e s u e c r u o s t u p n i e h t n o t n e d n e p e d s i r e t t i j e s a h p : 4 e t o n . 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 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 l a t x l a n r e t x e / w2 18 8 . 8 3z h m k l c l a n r e t x e / w 0 0 2z h m p t h l ; 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 1 e t o n 5 . 12 . 20 . 3s n t ) o ( k s2 e t o n ; w e k s t u p t u o 0 4s p t ) p p ( k s3 , 2 e t o n ; w e k s t r a p - o t - t r a p 0 0 7s 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 4 , 2 e t o n : e g n a r n o i t a r g e t n i , z h m 5 2 z h m 1 - z h 0 0 1 0 2 . 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 10 0 8s p c d o t u p t u o e l c y c y t u d l a t x l a n r e t x e / w5 45 5% k l c l a n r e t x e / wz h m 0 5 1 < ?8 42 5% t n e 5 e t o n ; e m i t e l b a n e t u p t u o 0 1s n t s i d 5 e t o n ; e m i t e l b a s i d t u p t u o 0 1s n 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 / . 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 : 2 e t o n d n a s e g a t l o v y l p p u s e m a s e h 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 v t a d e r u s a e m s i t u p t u o e h t , e c i v e d h c a e n o 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 o d d . 2 / . d e s u e c r u o s t u p n i e h t n o t n e d n e p e d s i r e t t i j e s a h p : 4 e t o n . 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
ics83940ag-02 revision a september 3, 2010 7 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer t able 6e. ac c haracteristics , v dd = 2.5v 5%, v ddo = 1.8v0.2v, t a = 0c to 70c 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 l a t x l a n r e t x e / w2 18 8 . 8 3z h m k l c l a n r e t x e / w 0 0 2z h m p t h l ; 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 1 e t o n 7 . 15 . 23 . 3s n t ) o ( k s2 e t o n ; w e k s t u p t u o 0 4s p t ) p p ( k s3 , 2 e t o n ; w e k s t r a p - o t - t r a p 0 0 7s 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 4 , 2 e t o n : e g n a r n o i t a r g e t n i , z h m 5 2 z h m 1 - z h 0 0 1 9 1 . 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 10 0 0 1s p c d o t u p t u o e l c y c y t u d l a t x l a n r e t x e / w5 45 5% k l c l a n r e t x e / wz h m 0 5 1 < ?6 44 5% t n e 5 e t o n ; e m i t e l b a n e t u p t u o 0 1s n t s i d 5 e t o n ; e m i t e l b a s i d t u p t u o 0 1s n 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 / . 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 : 2 e t o n d n a s e g a t l o v y l p p u s e m a s e h 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 v t a d e r u s a e m s i t u p t u o e h t , e c i v e d h c a e n o 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 o d d . 2 / . d e s u e c r u o s t u p n i e h t n o t n e d n e p e d s i r e t t i j e s a h p : 4 e t o n . 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
ics83940ag-02 revision a september 3, 2010 8 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer t ypical p hase n oise at 25mh z 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 -190 100 1k 10k 100k 1m 25mhz rms phase jitter (random) 100hz to 1mhz = 0.16ps (typical) o ffset f requency (h z ) n oise p ower dbc hz raw phase noise data ?
ics83940ag-02 revision a september 3, 2010 9 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer p arameter m easurement i nformation scope qx lvcmos gnd 3.3v c ore /2.5v o utput l oad ac t est c ircuit 2.4v0.065v v ddo -0.9v0.1v v dd 0.9v0.1v scope qx lvcmos gnd 2.5v c ore /2.5v o utput l oad ac t est c ircuit 2.05v5% v ddo -1.25v5% v dd 1.25v5% 3.3v c ore /3.3v o utput l oad ac t est c ircuit scope qx lvcmos gnd 1.65v5% -1.65v5% 3.3v c ore /1.8v o utput l oad ac t est c ircuit 2.5 c ore /1.8v o utput l oad ac t est c ircuit p art - to -p art s kew scope qx lvcmos gnd 1.25v5% -1.25v5% scope qx lvcmos gnd 1.6v0.025v v ddo -0.9v0.1v v dd 0.9v0.1v v dd , v ddo v dd , v ddo t sk(pp) v ddo 2 v ddo 2 qy qx part 1 part 2
ics83940ag-02 revision a september 3, 2010 10 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer t period t pw t period odc = v ddo 2 x 100% t pw q0:q3 tp lh tp hl v ddo 2 v dd 2 v ddo 2 v dd 2 clk q0:q3 o utput r ise /f all t ime p ropagation d elay o utput d uty c ycle /p ulse w idth /p eriod o utput s kew t sk(o) v ddo 2 v ddo 2 qy qx 20% 80% 80% 20% t r t f q0:q3 p arameter m easurement i nformation , continued
ics83940ag-02 revision a september 3, 2010 11 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer a pplication i nformation i nputs : c rystal i nputs for applications not requiring the use of the crystal oscillator input, both xtal_in and xtal_out can be left floating. though not required, but for additional protection, a 1k resistor can be tied from xtal_in to ground. clk i nput for applications not requiring the use of the clock input, it can be left floating. though not required, but for additional protection, a 1k resistor can be tied from the clk input to ground. s elect p ins all select pins have internal pull-ups and 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.
ics83940ag-02 revision a september 3, 2010 12 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer f igure 1. c rystal i nput i nterface c rystal i nput i nterface figure 1 shows an example of ics83904-02 crystal interface with a parallel resonant crystal. the frequency accuracy can be fine tuned by adjusting the c1 and c2 values. for a parallel crystal with loading capacitance cl = 18pf, we suggest c1 = 15pf and c2 = 15pf to start with. these values may be slightly fine tuned further to optimize the frequency accuracy for different board layouts. slightly increasing the c1 and c2 values will slightly reduce the frequency. slightly decreasing the c1 and c2 values will slightly increase the frequency. for the oscillator circuit below, r1 can be used, but is not required. for new designs, it is recommended that r1 not be used. o verdriving the c rystal i nterface the xtal_in input can a single-ended lvcmos signal through an ac coupling capacitor. a general interface diagram is shown in figure 2a. the xtal_out pin can be left floating. the maximum amplitude of the input signal should not exceed 2v and the input edge rate can be as slow as 10ns. this configuration requires that the output impedance of the driver (ro) plus the series resistance (rs) equals the transmission line impedance. in addition, matched termination at the crystal input will attenuate f igure 2a. g eneral d iagram for lvcmos d river to xtal i nput i nterface c1 15p r1 (optional) 0 x1 18pf parallel cry stal c2 15p xtal_in xtal_out f igure 2a. g eneral d iagram for lvpecl d river to xtal i nput i nterface r2 100 r1 100 rs 43 ro ~ 7 ohm driv er_lvcmos zo = 50 ohm c1 0.1uf 3.3v 3.3v cry stal input interf ace xtal_in xtal_out cry stal input interf ace xtal_in xtal_out r3 50 c1 0.1uf r2 50 r1 50 zo = 50 ohm lvpecl zo = 50 ohm vcc=3.3v the signal in half. this can be done in one of two ways. first, r1 and r2 in parallel should equal the transmission line impedance. for most 50 applications, r1 and r2 can be 100 . this can also be accomplished by removing r1 and making r2 50 . by overdring the crystal oscillator, the device will be functional, but note, the device performance is guaranteed by using a quartz crystal.
ics83940ag-02 revision a september 3, 2010 13 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer r eliability i nformation t ransistor c ount the transistor count for ics83904-02 is: 205 t able 7. ja vs . a ir f low t able for 16 l ead tssop ja by velocity (linear feet per minute) 0 1 2.5 multi-layer pcb, jedec standard test boards 100.3c/w 96.0c/w 93.9c/w p ackage o utline - g s uffix for 16 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 n6 1 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 9 . 40 1 . 5 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
ics83940ag-02 revision a september 3, 2010 14 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl 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 applications. any other applications such as those requiring extended temperature ranges high reliability or other extraordinar y environmental requirements 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 w arrant any idt product for use in life support devices or critical medical instruments. 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 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 2 0 - g a 4 0 9 3 82 0 a 4 0 9 3 8p o s s t d a e l 6 1e b u tc 0 7 o t c 0 t 2 0 - g a 4 0 9 3 82 0 a 4 0 9 3 8p o s s t d a e l 6 1l e e r & e p a t 0 0 5 2c 0 7 o t c 0 f l 2 0 - g a 4 0 9 3 8l 2 0 a 4 0 9 3p o s s t " e e r f - d a e l " d a e l 6 1e b u tc 0 7 o t c 0 t f l 2 0 - g a 4 0 9 3 8l 2 0 a 4 0 9 3p o s s t " e e r f - d a e l " d a e l 6 1l e e r & e p a t 0 0 5 2c 0 7 o t c 0 . t n a i l p m o c s h o r e r a d n a n o i t 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
ics83940ag-02 revision a september 3, 2010 15 ? 2010 integrated device technology, inc. ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl 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 a 9 t 2 1 4 1 . n o i t c e s e c a f r e t n i l a t s y r c e h t g n i v i r d r e v o d e t a d p u n m u l o c r e b m u n r e d r o / t r a p e h t n i x i f e r p " s c i " e h t d e t e l e d - e l b a t n o i t a m r o f n i g n i r e d r o . n m u l o c e r u t a r e p m e t e h t d e t c e r r o c d n a . r e t o o f / r e d a e h d e t a d p u 0 1 / 3 / 9
we?ve got your timing solution. sales 800-345-7015 (inside usa) +408-284-8200 (outside usa) fax: 408-284-2775 www.idt.com/go/contactidt tech support netcom@idt.com +480-763-2056 6024 silver creek valley road san jose, ca 95138 ? 2010 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 brands, product names and marks are or may be tradem arks or registered trademarks used to identify products or services of their respective owners. printed in usa ics83904-02 data sheet low skew, 1-to-4, crystal-to-lvcmos/lvttl fanout buffer

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