. p ate n ted tec h nolo g y . t w o hs tl di ff e r ential o u tp u t s . t w o s ingle l v ttl/l v c mos in pu t s . op e r atin g fr eq u e n cy up t o 3 00 mh z w it h 1 5 p f loa d . v e ry lo w outp u t pi n t o p in s ke w < 30 p s . 3.2 - n s p ro pagation delay ( max ) . 2.4 v t o 3.6 v p ow e r su ppl y . i n d u s t r ial tempe r atu r e r an g e: ? 4 0 c to 8 5 c . 1 4- pin t ssop package the po74hstl85352a is a low-skew, 1-to-2 differential fanout buffer targeted to meet the requirements of high-performance clock and data distribution applications. the device is implemented on cmos technology and has a fully differential internal architecture that is optimized to achieve low signal skews at operating frequencies of up to 300mhz . the device features two single-ended input paths that are multiplexed internally. this mux is controlled by the clk_sel pin. the po74hstl85352a functions as a signal-level translator and fanout on lvcmos / lvttl single-ended signal to two p air of hstl differential loads. since the po74hstl85352a introduces negligible jitter to the timing budget, it is the ideal choice for distributing high frequency, high precision clocks across back-planes and boards in communication systems. features: p i n co n f i gu r at i on l o gi c bloc k d ia g r a m description: cl k 0 cl k 1 q 0 n q 0 q 1 n q 1 0 1 cl k _ e n cl k _ s e l d q l e v e e c l k _ e n cl k _ s e l cl k 0 v e e cl k 1 v c c 1 2 3 4 5 6 7 1 4 1 3 1 2 1 1 1 0 9 8 v c c q 0 n q 0 n c q 1 n q 1 v c c l vcmos input to hst l output 1:2 fanout bu f fer 1 01 / 01 / 10 potato semiconductor corporation po74hstl85352a www.potatosemi.com 300mhz ttl/cmos potato chip
c o nt rol input f un c t i on ta b l e f un c t io n ta b l e pi n ch arac t eri st ic s pi n d e f i n i t io n s input clock select with pull down resistor l v cmos , l v t tl l v cmos , l v t tl l v cmos , l v t tl cl o ck input l v cmos , l v t tl cl o ck input i,pd gnd p o w er g r ound hstl hstl c ompleme n t output c l o ck enabled no c onne c t p o w er suppl y , p ositi v e c onne c tion p o w er l v cmos l v cmos t u r e output s t u p n s i t u p t u o n e _ k l l c e s _ k l e c c r u o s d e t c e l e 1 s q , 0 1 q q n , 0 q n 0 0 0 k l w c o l ; d e l b a s i h d g i h ; d e l b a s i d 1 1 0 k l w c o l ; d e l b a s i h d g i h ; d e l b a s i d 0 0 1 k l d c e l b a n d e e l b a n e 1 1 1 k l d c e l b a n d e e l b a n e s t u p n s i t u p t u o 1 k l c r o 0 k l 1 c q , 0 1 q q n , 0 q n 0 w o h l g i h h 1 g i w h o l l o b m y s r e t e m a r a s p n o i t i d n o c t s e m t u m i n i m l a c i p y t m u m i x a m s t i n u c n i e c n a t i c a p a c t u p n i f 4 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 88 88 k k 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 vcc vcc name i/o t ype description pin vee q[0:1]# q[0:1] nc clk_sel clk_en clk0 clk1 i,pd i,pu i,pd o o p o w er 7 , 8,14 12 , 9 13 , 10 11 3 2 4 6 1 , 5 l vcmos input to hst l output 1:2 fanout bu f fer 2 01 / 01 / 10 potato semiconductor corporation po74hstl85352a www.potatosemi.com 300mhz ttl/cmos potato chip
dc ele c t r ica l ch ara c t eri s t ic s s y m b o l descrip t i o n tes t c o ndi t i o n s m i n t y p m a x uni t v o h o u t p u t h i g h v o l t a g e v cc = 3 v v i n = v i h o r v i l , i o h = - 1 2 m a 2. 4 3 - v v o l o u t p u t l o w v o l t a g e v cc = 3 v v i n = v i h o r v i l , i o h = 1 2 m a - 0.3 0.5 v v i k c l a m p d i o d e v o l t a g e v c c = m i n . a n d i i n = - 1 8 m a - -0.7 -1.2 v n o t es : 1 . f o r c o n d i t i o n s s h o w n a s m a x . o r m i n . , u s e a p p r o p r i a t e v a l u e s p e c i f i e d u n d e r e l e c t r i c a l c h a r a c t e r i s t i c s fo r t h e a p p l i c a b l e d e v i c e t y p e . 2 . t y p i c a l v a l u e s a r e a t v c c = 3 . 3 v , 2 5 c a m b i e n t . 3 . t h i s p a r a m e t e r i s g u a r a n t e e d b u t n o t t e s t e d . 4 . n o t m o r e t h a n o n e o u t p u t s h o u l d b e s h o r t e d a t o n e t i m e . d u r a t i o n o f t h e t e s t s h o u l d n o t e x ce e d o n e s e c o n d . 5 . v o h = v c c ? 0 . 6 v a t r a t e d c u rr e n t m ax i m u m ra t i n g s d e s c r i p t i on m a x u n i t s t or a g e tem p e r at ur e -65 t o 150 c operation tem p eratu r e -40 to 85 c operation volt a g e -0.5 to +4.6 v i nput volt a ge -0.5 to +5.5 v output volta g e -0.5 to vc c + 0.5 v n o t e : s t re s s e s g r eate r t h a n l i s t e d u n d e r m a x i m u m r a t i n g s m a y c a u s e p e r m a n e n t d a m a g e t o t h e d e v i c e . t h i s is a stress rati n g o n l y a n d f u n c ti o n a l o pe r ati o n o f t h e d e v i c e a t t h e s e o r a n y o t h e r c o n d iti o n s a b o v e t h o s e i n d i c a t e d i n t h e o p e rati o n a l secti o n s o f t h i s s p eci f icati o n i s n o t i m p lie d . e x p o s u r e t o a b s o l u te m a x i m u m r a ti n g c o n d iti o n s f o r e x t e n d e d p e r i o d s m a y a f f e c t relia b ili t y s p ec i f icati o n is n o t i m p lie d . m ultiple supplies : t he v oltage on a n y input or i/o pin c annot e x c eed the p o w er pin du r ing p o w er-u p . p o w er supply sequencing is n o t r equi r e d . l vcmos input to hst l output 1:2 fanout bu f fer 3 01 / 01 / 10 potato semiconductor corporation po74hstl85352a www.potatosemi.com 300mhz ttl/cmos potato chip
po w er supply c h aracteristics s y m b o l descrip t i o n tes t c o ndi t i o n s ( 1 ) m i n t y p m a x uni t ic c q qu i e s c e n t p o w e r s u p p l y c ur r e n t v cc = m a x , v i n = v c c o r g n d - 0.1 30 ua n o t es : 1 . f o r c o n d i t i o n s s h o w n a s m a x . o r m i n . , u s e a p p r o p r i a t e v a l u e s p e c i f i e d u n d e r e l e c t r i c a l c h a r a c t e r i s t i c s fo r t h e a p p l i c a b l e d e v i c e t y p e . 2 . t y pic a l v a l u e s a r e a t v c c = 3 . 3 v , 2 5 c a m b i e n t . 3 . t h i s p a r a m e t e r i s g u a r a n t e e d b u t n o t t e s t e d . 4 . n o t m o r e t h a n o n e o u t p u t s h o u l d b e s h o r t e d a t o n e t i m e . d u r a t i o n o f t h e t e s t s h o u l d n o t e x c e e d o n e s e c o n d . s w i t c h i ng ch ara c t eri s t ic s t i n u x a m ) 1 ( s n o i t i d n o c t s e t n o i t p i r c s e d l o b m y s t pd p r o p a g a t i o n d e l a y cl k a or cl k b to o ut p ut pai r c l = 1 5 p f 3.2 ns t r / t f r i s e / f a l l t i m e 0 . 8 v ? 2 . 0 v 0.8 ns tsk(o) o ut p u t p i n t o p i n s k e w ( s a m e p a c k a g e ) ps ps t s k ( p p ) o u t p u t s k e w ( d i ff e r e n t p a c k a g e ) f m ax f p 5 1 = l c y c n e u q e r f t u p n i 250 mhz n o t es : 1 . s e e t e s t c i r c u i t s a n d w a v e f o r ms . 2 . t p l h , t p h l , t s k ( p ) , a n d t s k ( o ) a r e p r o d u c t i o n t e s t e d . a l l o t h e r p a r a m e t e r s g u a r a n t e e d b u t n o t p r o d u c t i o n t e s t e d . 3 . a i r f l o w o f 1 m / s i s r e c o mm e n d e d f o r f r e q u e n c i e s a b o v e 1 3 3 m h z c l = 1 5 p f , 1 2 5 m h z c l = 1 5 p f , 1 2 5 m h z 30 350 300 l vcmos input to hst l output 1:2 fanout bu f fer 4 01 / 01 / 10 potato semiconductor corporation po74hstl85352a www.potatosemi.com 300mhz ttl/cmos potato chip
test waveforms figure 2. hst l output figure 1. l vttl/ l vcmos input w a veform definition figure 3. propogation dela y , output pulse ske w , and output-to-output skew for d to output pair tphl tplh tpd input clock output clock another output clock vo tsk(o) vo t r ,tf, 20-80% input 3v 1.5v 0v figure 4. clk_en t iming diagram ena b led disa b led clk clk_en n q 0 : n q 3 q 0 : q 3 l vcmos input to hst l output 1:2 fanout bu f fer 5 01 / 01 / 10 potato semiconductor corporation po74hstl85352a www.potatosemi.com 300mhz ttl/cmos potato chip
test cir c uit 0.193 0.201 0.047 0.002 0.006 0.0256 typical 1 14 0.169 0.177 0.05 0.15 4.3 4.5 1.20 max. 4.90 5.10 0.65 0.19 0.30 0.007 0.012 p a c k a g i ng mec h a n ica l d r a w i ng : 1 4 p i n t ss o p x.xx x.xx denotes dimensions in millimeters seating plane 0.240 0.264 6.1 6.7 50ohm 15pf to 2pf 15pf to 2pf vcc pulse generator d.u.t l vcmos input to hst l output 1:2 fanout bu f fer 6 01 / 01 / 10 potato semiconductor corporation po74hstl85352a www.potatosemi.com 300mhz ttl/cmos potato chip
l vcmos input to hst l output 1:2 fanout bu f fer ic ordering information top-marking ordering code package pb-free & green po74hstl85352asu for tube PO74HSTL85352ASR for tape & reel po74hstl85352as -40 c to 85 c -40 c to 85 c t a pb-free & green 14pin 173mil tssop ic package information package t 12 8 t op l eft corner 39 (12?) 3000 64 (20?) 96 14pin 173mil tssop code package type tape width tape trailer tube tape & reel length tape pitch qty length tape leader per tape qty per pin 1 location (mm) (mm) po74hstl85352as 14pin 173mil tssop 7 01 / 01 / 10 potato semiconductor corporation po74hstl85352a www.potatosemi.com 300mhz ttl/cmos potato chip
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