integrated circuit systems, inc. 840004agi-01 www.icst.com/products/hiperclocks.html rev. a june 28, 2005 1 ics840004i-01 f emto c locks ? c rystal - to - lvcmos/lvttl f requency s ynthesizer preliminary g eneral d escription the ics840004i-01 is a 4 output lvcmos/lvttl synthesizer optimized to generate ethernet reference clock frequencies and is a member of the hiperclocks tm family of high performance clock solutions from ics. using a 25mhz, 18pf parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (f_sel1:0): 156.25mhz, 125mhz, and 62.5mhz. the ics840004i-01 uses ics? 3 rd generation low phase noise vco technology and can achieve 1ps or lower typical random rms phase jitter, easily meeting ethernet jitter requirements. the ics840004i-01 is packaged in a small 20-pin tssop package. hiperclocks? ics b lock d iagram f eatures ? four lvcmos/lvttl outputs, 15 typical output impedance ? selectable crystal oscillator interface or lvcmos single-ended input ? supports the following output frequencies: 156.25mhz, 125mhz and 62.5mhz ? rms phase jitter @ 156.25mhz (1.875mhz - 20mhz): 0.52ps (typical) ? output supply modes: core/output 3.3v/3.3v 3.3v/2.5v 2.5v/2.5v ? -40c to 85c ambient operating temperature q0 q1 q2 q3 oe f_sel1:0 npll_sel nxtal_sel xtal_in xtal_out test_clk mr osc phase detector vco m = 25 (fixed) f_sel1:0 0 0 4 0 1 5 1 0 10 1 1 5 0 1 1 0 2 n 25mhz pullup pulldown pulldown pulldown pullup:pullup pulldown f requency s elect f unction t able p in a ssignment ics840004i-01 20-lead tssop 6.5mm x 4.4mm x 0.92mm package body g package top view f_sel0 nc nxtal_sel test_clk oe mr npll_sel v dda nc v dd 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 f_sel1 gnd q0 q1 v ddo q2 q3 gnd xtal_in xtal_out s t u p n i ) z h m ( y c n e u q e r f t u p t u o ) . f e r z h m 5 2 ( 1 l e s _ f0 l e s _ f r e d i v i d m e u l a v r e d i v i d n e u l a v n / m e u l a v o i t a r 00 5 24 5 2 . 65 2 . 6 5 1 01 5 25 5 5 2 1 10 5 20 15 . 25 . 2 6 11 5 25 5 5 2 1 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.
integrated circuit systems, inc. 840004agi-01 www.icst.com/products/hiperclocks.html rev. a june 28, 2005 2 ics840004i-01 f emto c locks ? c rystal - to - lvcmos/lvttl 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 0 2 , 1 , 0 l e s _ f 1 l e s _ f 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 l t t v l / s o m c v l . n i p t c e l e s y c n e u q e r f 9 , 2c nd e s u n u. t c e n n o c o n 3l e s _ l a t x nt u p n in w o d l l u p e c n e r e f e r l l p e h t s a s t u p n i k l c _ t s e t r o l a t s y r c e h t n e e w t e b s t c e l e s l a t x s t c e l e s , w o l n e h w . k l c _ t s e t s t c e l e s , h g i h n e h w . e c r u o 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 . s u p n i 4k l c _ t s e tt 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 d e d n e - e l g n i s 5e ot u p n ip u l l u p e h t , w o l n e h w . e v i t c a e r a s t u p t u o e h t , h g i h n e h w . n i p 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 t a t s e c n a d e p m i h g i h a n i e r a s t u p t u o 6r mt u p n in w o d l l u p 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 l a n r e t n i e h t , w o l c i g o l n e h w . w o l o g o t s t u p u t o e h t g n i s u a c t e s e r . 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 t u p t u o e h t d n a s r e d i v i d 7l e s _ l l p nt u p n in w o d l l u p . t u p t u o o c v e h t m o r f n e v i r d s i t u p t u o e h t , w o l n e h w . s s a p y b l l p = y c n e u q e r f t u p t u o e h t d n a d e s s a p y b s i l l p e h t , h g i h n e h w . r e d i v i d t u p t u o n / y c n e u q e r f k c o l c e c n e r e f e r . 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 8v a d d r e w o p. n i p y l p p u s g o l a n a 0 1v d d r e w o p. n i p y l p p u s e r o c , 1 1 2 1 , t u o _ l a t x n i _ l a t x t u p n i . 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 r o t a l l i c s o l a t s y r c . t u p n i e h t s i n i _ l a t x 9 1 , 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 5 1 , 4 1 8 1 , 7 1 , 2 q , 3 q 0 q , 1 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 d e d n e - e l g n i s 5 1 . e c n e d e p m i t u p t u o l a c i p y t 6 1v o d d r e w o p. 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 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 v d d v , a d d v , o d d v 5 6 4 . 3 =d b tf p v d d v , a d d v , v 5 6 4 . 3 = o d d v 5 2 6 . 2 =d b tf p v d d v , a d d v , o d d v 5 2 6 . 2 =d b tf p r p u l l u p r o t s i s e r p u l l u p t u p n i 1 5k r n w o d l l u p r o t s i s e r n w o d l l u p t u p n i 1 5k r t u o e c n a d e p m i t u p t u o 5 1
integrated circuit systems, inc. 840004agi-01 www.icst.com/products/hiperclocks.html rev. a june 28, 2005 3 ics840004i-01 f emto c locks ? c rystal - to - lvcmos/lvttl f requency s ynthesizer preliminary t able 3a. p ower s upply dc c haracteristics , v ddd = v dda = 3.3v5%, v ddo = 3.3v5% or 2.5v5%, t a = -40c to 85c 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 dd + 0.5v package thermal impedance, ja 73.2c/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 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 a d d 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 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 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 0 9a m i a d d t n e r r u c y l p p u s g o l a n a 8a m i o d d t n e r r u c y l p p u s t u p t u o 5a m t able 3b. p ower s upply dc c haracteristics , v dd = v dda = v ddo = 2.5v5%, t a = -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 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 a d d e g a t l o v y l p p u s g o l a n a 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 0 8a m i a d d t n e r r u c y l p p u s g o l a n a 8a m i o d d t n e r r u c y l p p u s t u p t u o 5a m
integrated circuit systems, inc. 840004agi-01 www.icst.com/products/hiperclocks.html rev. a june 28, 2005 4 ics840004i-01 f emto c locks ? c rystal - to - lvcmos/lvttl f requency s ynthesizer preliminary t able 5a. ac c haracteristics , v dd = v dda = v ddo = 3.3v5%, t a = -40c to 85c t able 4. 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 5 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 t able 3c. lvcmos/lvttl dc c haracteristics , v dd = v dda = v ddo = 3.3v5% or 2.5v5%, or v dd = v dda = 3.3v5%, v ddo = 2.5v5%, t a = -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 v d d v 3 . 3 =2v d d 3 . 0 +v v d d v 5 . 2 =7 . 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 v 3 . 3 =3 . 0 -8 . 0v v d d v 5 . 2 =3 . 0 -7 . 0v i h i t u p n i t n e r r u c h g i h 1 : 0 l e s _ f , e o v d d v = n i r o v 5 6 4 . 3 = v 5 2 6 . 2 5a , r m , l e s _ l l p n k l c _ t s e t , l e s _ l a t x n v d d v = n i r o v 5 6 4 . 3 = v 5 2 6 . 2 0 5 1a i l i t u p n i t n e r r u c w o l 1 : 0 l e s _ f , e o v d d , v 5 . 2 r o v 5 6 4 . 3 = v n i v 0 = 0 5 1 -a , r m , l e s _ l l p n k l c _ t s e t , l e s _ l a t x n v d d , v 5 . 2 r o v 5 6 4 . 3 = v n i v 0 = 5 -a v h o 1 e t o n ; e g a t l o v h g i h t u p t u o v o d d % 5 v 3 . 3 =6 . 2v v o d d % 5 v 5 . 2 =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 ov o d d % 5 v 5 . 2 r o v 3 . 3 =5 . 0v 0 5 h t i w d e t a n i m r e t s t u p t u o : 1 e t o n v o t o d d . t i u c r i c t s e t d a o l t u p t u o , n o i t a m r o f n i t n e m e r u s a e m r e t e m a r a p e e s . 2 / 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 y c n e u q e r f t u p t u o 5 2 . 6 5 1z h m 5 2 1z h m 5 . 2 6z h m t ) o ( k s2 , 1 e t o n ; w e k s t u p t u o d 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 . 6 5 12 5 . 0s p ) z h m 0 2 - z h m 5 7 8 . 1 ( , z h m 5 2 15 6 . 0s p ) z h m 0 2 - z h m 5 7 8 . 1 ( , z h m 5 . 2 65 5 . 0s p t l e m i t k c o l l l p d b ts m 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 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 : 1 e t o n v t a d e r u s a e m o d d . 2 / . 5 6 d r a d n a t s c e d e j h t i w e c n a d r o c c a n i d e n i f e d s i r e t e m a r a p s i h t : 2 e t o n . 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
integrated circuit systems, inc. 840004agi-01 www.icst.com/products/hiperclocks.html rev. a june 28, 2005 5 ics840004i-01 f emto c locks ? c rystal - to - lvcmos/lvttl f requency s ynthesizer preliminary t able 5b. ac c haracteristics , v dd = v dda = 3.3v5%, v ddo = 2.5v5%, t a = -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 f t u o y c n e u q e r f t u p t u o 5 2 . 6 5 1z h m 5 2 1z h m 5 . 2 6z h m t ) o ( k s2 , 1 e t o n ; w e k s t u p t u o d 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 . 6 5 18 4 . 0s p ) z h m 0 2 - z h m 5 7 8 . 1 ( , z h m 5 2 19 5 . 0s p ) z h m 0 2 - z h m 5 7 8 . 1 ( , z h m 5 . 2 63 5 . 0s p t l e m i t k c o l l l p d b ts m 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 5 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 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 : 1 e t o n v t a d e r u s a e m o d d . 2 / . 5 6 d r a d n a t s c e d e j h t i w e c n a d r o c c a n i d e n i f e d s i r e t e m a r a p s i h t : 2 e t o n . 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 t able 5c. ac c haracteristics , v dd = v dda = v ddo = 2.5v5%, t a = -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 f t u o y c n e u q e r f t u p t u o 5 2 . 6 5 1z h m 5 2 1z h m 5 . 2 6z h m t ) o ( k s2 , 1 e t o n ; w e k s t u p t u o d 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 . 6 5 10 5 . 0s p ) z h m 0 2 - z h m 5 7 8 . 1 ( , z h m 5 2 10 6 . 0s p ) z h m 0 2 - z h m 5 7 8 . 1 ( , z h m 5 . 2 61 5 . 0s p t l e m i t k c o l l l p d b ts m 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 5 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 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 : 1 e t o n v t a d e r u s a e m o d d . 2 / . 5 6 d r a d n a t s c e d e j h t i w e c n a d r o c c a n i d e n i f e d s i r e t e m a r a p s i h t : 2 e t o n . 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
integrated circuit systems, inc. 840004agi-01 www.icst.com/products/hiperclocks.html rev. a june 28, 2005 6 ics840004i-01 f emto c locks ? c rystal - to - lvcmos/lvttl f requency s ynthesizer preliminary p arameter m easurement i nformation t period t pw t period odc = v ddo 2 x 100% t pw q0:q3 rms p hase j itter o utput s kew 3.3v c ore /3.3v o utput l oad ac t est c ircuit scope qx lvcmos 1.65v5% -1.65v5% o utput d uty c ycle /p ulse w idth /p eriod clock outputs 20% 80% 80% 20% t r t f v dd , v dda , v ddo gnd phase noise mas k offset frequency f 1 f 2 phase noise plot rms jitter = area under the masked phase noise plot noise power t sk(o) v ddo 2 v ddo 2 qx qy o utput r ise /f all t ime scope qx lvcmos 2.05v5% -1.25v5% v dd , v dda gnd 1.25v5% v ddo 3.3v c ore /2.5v o utput l oad ac t est c ircuit 2.5v c ore /2.5v o utput l oad ac t est c ircuit scope qx lvcmos 1.25v5% -1.25v5% v dd , v dda , v ddo gnd
integrated circuit systems, inc. 840004agi-01 www.icst.com/products/hiperclocks.html rev. a june 28, 2005 7 ics840004i-01 f emto c locks ? c rystal - to - lvcmos/lvttl f requency s ynthesizer preliminary a pplication i nformation as in any high speed analog circuitry, the power supply pins are vulnerable to random noise. the ics840004i-01 provides separate power supplies to isolate any high switching noise from the outputs to the internal pll. v dd , v dda , and v ddo 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 1 illustrates how a 10 resistor along with a 10f and a .01 f bypass capacitor should be connected to each v dda . p ower s upply f iltering t echniques f igure 1. p ower s upply f iltering 10 v dda 10 f .01 f 3.3v or 2.5v .01 f v dd c rystal i nput i nterface the ics840004i-01 has been characterized with 18pf paral- lel resonant crystals. the capacitor values shown in figure 2 figure 2. c rystal i npu t i nterface below were determined using a 25mhz 18pf parallel reso- nant crystal and were chosen to minimize the ppm error. ics84332 xtal_in xtal_out x1 18pf parallel cry stal c2 22p c1 22p ics840004i-01
integrated circuit systems, inc. 840004agi-01 www.icst.com/products/hiperclocks.html rev. a june 28, 2005 8 ics840004i-01 f emto c locks ? c rystal - to - lvcmos/lvttl f requency s ynthesizer preliminary r eliability i nformation t ransistor c ount the transistor count for ics840004i-01 is: tbd t able 6. ja vs . a ir f low t able for 20 l ead tssop ja by velocity (linear feet per minute) 0 200 500 single-layer pcb, jedec standard test boards 114.5c/w 98.0c/w 88.0c/w multi-layer pcb, jedec standard test boards 73. 2c/w 66.6c/w 63.5c/w note: most modern pcb designs use multi-layered boards. the data in the second row pertains to most designs. l ayout g uideline figure 3 shows a schematic example of the ics840004i-01. an example of lvcmos termination is shown in this schematic. additional lvcmos termination approaches are shown in the lvcmos termination application note. in this example, an 18pf parallel resonant 25mhz crystal is used. the c1=22pf and f igure 3. ics840004i-01 s chematic e xample c2=22pf are recommended for frequency accuracy. for differ- ent board layout, the c1 and c2 may be slightly adjusted for optimizing frequency accuracy. 1k pullup or pulldown resis- tors can be used for the logic control input pins. xtal _ i n unused outputs can be left floating. there should be no trace attached to unused outputs. device characterized and specification limits set with all outputs terminated. ru1 1k lvcmos vddo=3.3v r4 100 r3 36 logic control input examples vdda c5 0.1u vdd=3.3v rd1 not install vdd x1 c3 10uf to logic inp ut pins optional termination vdd set logic input to '1' r5 100 u1 ics840004i-01 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 20 19 18 17 f_sel0 nc nxtal_sel test_clk oe mr npll_sel vdda nc vdd xtal_out xtal_in gnd q3 q2 vddo f_sel1 gnd q0 q1 c2 22pf c6 0.1u vddo ru2 not install lvcmos r2 10 zo = 50 ohm vdd vdd vdd rd2 1k vdd set logic input to '0' xtal_out c1 22pf to logic inp ut pins if not using the crystal input, it can be left floating. for additional protection the xtal_in pin can be tied to ground. c4 0.01u zo = 50 ohm
integrated circuit systems, inc. 840004agi-01 www.icst.com/products/hiperclocks.html rev. a june 28, 2005 9 ics840004i-01 f emto c locks ? c rystal - to - lvcmos/lvttl f requency s ynthesizer preliminary p ackage o utline - g s uffix for 20 l ead tssop t able 7. p ackage d imensions l o b m y s s r e t e m i l l i m n i mx a m n0 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 4 . 60 6 . 6 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 reference document: jedec publication 95, mo-153
integrated circuit systems, inc. 840004agi-01 www.icst.com/products/hiperclocks.html rev. a june 28, 2005 10 ics840004i-01 f emto c locks ? c rystal - to - lvcmos/lvttl f requency s ynthesizer preliminary t able 8. o rdering i nformation while the information presented herein has been checked for both accuracy and reliability, integrated circuit systems, incorpor ated (ics) assumes no responsibility for either its use or for infringement of any patents or other rights of third parties, which would result from its use. no other circuits, patent s, or licenses are implied. this product is intended for use in normal commercial and industrial applications. any other applications such as those requiring high reliability or other extr aordinary environmental requirements are not recommended without additional processing by ics. ics reserves the right to change any circuitry or specifications without noti ce. ics does not authorize or warrant any ics product for use in life support devices or critical medical instruments. the aforementioned trademarks, hiperclocks and f emto c locks are trademarks of integrated circuit systems, inc. or its subsidiaries in the united states and/or other countries. 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 4 0 0 0 4 8 s c i1 0 i a 4 0 0 0 4 8 s c ip o s s t d a e l 0 2e b u tc 5 8 o t c 0 4 - t 1 0 - i g a 4 0 0 0 4 8 s c i1 0 i a 4 0 0 0 4 8 s c ip o s s t d a e l 0 2l e e r & e p a t 0 0 5 2c 5 8 o t c 0 4 -
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