1 ps8558b 09/24/04 1 2 3 v dd 4 clk1 5 clk0 6 clk2 7 v dd 8 gnd 9 gnd 10 v dd clk8 gnd v dd clk6 gnd clk5 20 clk4 19 18 17 16 15 14 13 12 11 buf_in gnd clk3 clk7 clk9 pin configuration block diagram features ? high frequency >150 mhz ? high-speed, low-noise, non-inverting 1-10 buffer ? low-skew (<150ps) between any two output clocks ? low duty cycle distortion <300ps ? low propagation delay <3.5ns ? multiple v dd , gnd pins for noise reduction ? 2.5v supply voltage and 3v tolerant input ? packaging (pb-free & green available): -20-pin soic (s) -20-pin ssop (h) -20-pin qsop (q) 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1-10 clock buffer for networking applications pi49fct20807 20-pin h, q, s description the pi49fct20807, a 2.5v compatible, high-speed, low-noise 1-10 non-inverting clock buffer, is designed to target networking appli- cations that require low-skew, low-jitter, and high-frequency clock distribution. providing output-to-output skew as low as 150ps, the pi49fct20807 is an ideal clock distribution device for synchronous systems. designing synchronous networking systems requires a tight level of skew from a large number of outputs. pin description e m a n n i pn o i t p i r c s e d n i _ f u bt u p n i ] 9 : 0 [ k l cs t u p t u o d n gd n u o r g v d d r e w o p clk9 clk2 clk1 clk0 buf_in clk3
2 ps8558b 09/24/04 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi49fct20807 1-10 clock buffer for networking applications storage temperature ...................................................... ?65c to +150c v dd voltage ...................................................................... ?0.5v to +3.6v input/output voltage (4) ....................................................... ?0.5v to v dd +0.5v dc output current ....................................................... ?60ma to +60ma power dissipation ........................................................................ 500mw maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) note: stresses greater than those listed under maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device type. 2. typical values are at v dd = 2.5v, +25c ambient and maximum loading. 3. v oh = v dd ? 0.6v at rated current. 4. this value is limited to 3.6v maximum. s r e t e m a r a pn o i t p i r c s e ds n o i t i d n o c t s e t ) 1 ( . n i m. p y t ) 2 ( . 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) s n i p t u p n i ( l e v e l h g i h c i g o l d e e t n a r a u g7 . 1? v v l i e g a t l o v w o l t u p n i) s n i p t u p n i ( l e v e l w o l c i g o l d e e t n a r a u g?7 . 0 i i t n e r r u c t u p n iv d d v , . x a m = n i v = d d d n g r ov n i v = d d ?? 1 ma v k i e g a t l o v e d o i d p m a l cv d d i , . n i m = n i a m 8 1 ? =?7 . 0 ?1 ? v v h o e g a t l o v h g i h t u p t u ov d d v , . n i m = n i v = h i v r o l i i h o a m 1 ? =2?? i h o a m 8 ? =8 . 1 ) 3 ( ? v l o e g a t l o v w o l t u p t u ov d d v , . n i m = n i v = h i v r o l i i l o a m 1 =??4 . 0 i l o a m 8 =? 6 . 0 dc electrical characteristics (over the operating range) operating range v in voltage ......................................................................... ?0.3v to 3.6v v dd voltage ........................................................................... 2.5v 0.2v industrial temperature .................................................... ?40c to +85c input frequency ............................................................. dc to 150 mhz capacitive loading ............................................................. 10pf to 25pf notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device. 2. typical values are at v dd = 2.5v, +25c ambient. 3. per ttl driven input (v in = v dd ? 0.6v); all other inputs at v dd or gnd. s r e t e m a r a pn o i t p i r c s e ds n o i t i d n o c t s e t ) 1 ( . n i m. p y t ) 2 ( . x a ms t i n u i q d d y l p p u s r e w o p t n e c s e i u q t n e r r u c v d d . x a m =v n i v r o d n g = d d ?1 . 00 2 a ? i d d r e p t n e r r u c y l p p u s h g i h l t t @ s t u p n i v d d . x a m =v n i v = d d v 6 . 0 ? ) 3 ( ?7 40 0 3 i d d t n e r r u c y l p p u s c i m a n y d ) 1 h p a r g e e s ( v d d & f p 5 1 , v 7 . 2 = d a o l m h o - 3 3 z h m 0 5 1?6 3 1? a m power supply characteristics
3 ps8558b 09/24/04 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi49fct20807 1-10 clock buffer for networking applications capacitance (t a = 25c, f = 1 mhz) note: 1. this parameter is determined by device characterization but is not production tested. graph 1. dynamic current vs. clock frequency s r e t e m a r a p ) 1 ( n o i t p i r c s e ds n o i t i d n o c t s e t. p y t. 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 iv n i v 0 =34 f p c t u o e c n a t i c a p a c t u p t u ov t u o v 0 =6 notes: 1. see test circuit and waveforms. 2. skew measured at worse cast temperature (max. temp). s r e t e m a r a pn o i t p i r c s e ds n o i t i d n o c t s e t ) 1 ( . n i m. p y t. x a ms t i n u t r t / f v 7 . 1 ~ v 7 . 0 e m i t l l a f / e s i r n k l c c l z h m 0 0 1 , f p 2 2 =?0 . 15 2 . 1 s n c l z h m 0 5 1 , f p 2 1 =?0 . 12 . 1 t h l p t l h p n k l c o t n i _ f u b y a l e d n o i t a g a p o r p c l z h m 0 0 1 , f p 2 2 =?0 . 35 . 3 c l z h m 0 5 1 , f p 2 1 =?4 . 27 . 2 t ) o ( k s ) 2 ( e g a k c a p e m a s e h t f o s t u p t u o o w t n e e w t e b w e k s ) n o i t i s n a r t e m a s ( c l z h m 0 0 1 , f p 2 2 =?0 0 10 5 1 s p c l z h m 0 5 1 , f p 2 1 =?0 0 10 5 1 t ) p ( k s ) 2 ( t ( s n o i t i s n a r t e t i s o p p o n e e w t e b w e k s l h p t - h l p ) t u p t u o e m a s e h t f o c l z h m 0 0 1 , f p 2 2 =?0 5 20 0 3 c l z h m 0 5 1 , f p 2 1 =?0 5 20 0 3 t ) t ( k s ) 2 ( e g a k c a p t n e r e f f i d f o s t u p t u o o w t n e e w t e b w e k s ) 4 ( c l z h m 0 5 1 , f p 2 1 =?0 0 40 0 6 switching characteristics (v dd = 2.5v 0.2v, t a = 85c) test circuits for all outputs definitions: c l = load capacitance: includes jig and probe capacitance. pulse generator d.u.t. v in v out c l v dd 160 140 120 100 80 60 clock frequency [mhz] dynamic current - i dd [ma] 40 20 0 0 50 100 150 200 load = 15pf & 33 ohms load = 0
4 ps8558b 09/24/04 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi49fct20807 1-10 clock buffer for networking applications switching waveforms propagation delay package skew ? t sk(t) pulse skew ? t sk(p) output skew ? t sk(o) input t plhx 2.5v 1.25v 0v clkx v oh 1.25v v ol t phlx t sk(o) clky v oh 1.25v v ol t sk(o) t plhy t phly t sk(o) = t plhy ? t plhx or t phly ? t phlx input t plh1 2.5v 1.25v 0v package 1 output v oh 1.25v v ol t phl1 t sk(t) package 2 output v oh 1.25v v ol t sk(t) t plh2 t phl2 t sk(t) = ? t plh2 ? t plh1 ? or ? t phl2 ? t phl1 ? input t plh 2.5v 1.25v 0v output v oh 1.25v v ol t phl 1.7v 0.7v t r t f input t plh 2.5v 1.25v 0v output v oh 1.25v v ol t phl t sk(p) = | t phl ? t plh | seating plane .050 bsc 1 20 0-8? .2914 .2992 x.xx x.xx denotes controlling dimensions in millimeters 7.40 7.60 .496 .511 12.60 12.99 1.27 .0926 .1043 2.35 2.65 .394 .419 10.00 10.65 .0040 .0118 0.10 0.30 .013 .020 0.33 0.51 .010 .029 0.254 0.737 .0091 .0125 0.23 0.32 0.41 1.27 .016 .050 x 45? .020 .030 0.508 0.762 ref packaging mechanical: 20-pin soic (s)
5 ps8558b 09/24/04 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi49fct20807 1-10 clock buffer for networking applications .272 .295 .078 .002 seating plane .0098 max. .0256 bsc .022 .037 .004 .009 .291 .322 1 20 .197 .220 0.25 x.xx x.xx denotes dimensions in millimeters 0.050 7.40 8.20 0.55 0.95 0.09 0.25 5.00 5.60 2.00 6.90 7.50 0.65 max min packaging mechanical: 20-pin ssop (h) packaging mechanical: 20-pin qsop (q) .337 .344 .053 .069 .004 .010 seating plane .025 bsc .007 .010 .228 .244 .150 .157 1 20 .016 .050 x.xx x.xx denotes dimensions in millimeters 0.635 8.56 8.74 1.35 1.75 5.79 6.19 0.41 1.27 0.101 0.254 .008 .012 0.203 0.305 3.81 3.99 0.178 0.254 .058 1.47 .015 x 45? 0.38 ref detail a detail a .008 0.20 min. guage plane .010 0.254 .041 1.04 ref .016 .035 0.41 0.89 0?-6? .008 .013 0.20 0.33
6 ps8558b 09/24/04 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi49fct20807 1-10 clock buffer for networking applications notes: 1. thermal characteristics can be found on the company web site at www.pericom.com/packaging/ pericom semiconductor corporation ? 1-800-435-2336 ? www.pericom.com ordering information ordering code package code package type pi49fct20807s s 20-pin 300-mil wide soic pi49fct20807se s pb-free & green, 20-pin 300-mil wide soic pi49fct20807q q 20-pin 150-mil wide qsop pi49fct20807qe q pb-free & green, 20-pin 150-mil wide qsop pi49fct20807h h 20-pin 209-mil wide ssop PI49FCT20807HE h pb-free & green, 20-pin 209-mil wide ssop
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