feature s : . p atente d tec h n o lo g y . o p e r a ti n g f r e q u e n c y u p t o 1 . 12 5 gh z w it h 2 p f l o a d . o p e r a ti n g f r e q u e n c y u p t o 7 0 0 m h z w i t h 5 p f l o a d . o p e r a ti n g f r e q u e n c y u p t o 30 0 m h z w i t h 15 p f l o a d . o p e r a ti n g f r e q u e n c y u p t o 10 0 m h z w i t h 50 p f l o a d . v cc o pe r ate s fro m 1.6 5 v t o 3 . 6 v . p r op a g a ti o n d e l a y < 1. 5 n s m a x w i t h 1 5 p f l o a d . l o w i n p ut ca p acit a n ce: 4 p f t y pi c a l . a v a il a b l e i n 2 0 p i n tssop pa c k a g e p i n co n f i gu r at i on l o gi c bloc k d ia g r a m pin de s cription descript i o n : p otat o s emico n duct or?s po 7 4g 24 4a i s de s i g ned f o r w o r l d top pe rf o r mance u s in g s ubmic ro n c mos tec h nolog y to achie v e 1 . 125 gh z ttl /c mos o ut p ut fr equency w ith le ss t h an 1. 5 n s p r o p a g a ti o n d e l a y . thi s o ctal b us b uff e r g ate i s d e s igned f o r 1 . 65 -v to 3 . 6 -v v cc o pe r ation . the po 74 g2 44 a features independent line driver swith 3-state outputs. each output is disabled when the associated output- enable(oe) input is high. i nput s ca n be d r ive n fr om eithe r 3. 3v o r 5 v d evice s . thi s f eatu r e all ows the us e o f the s e device s a s t r an s lato rs i n a mi x ed 3 .3 v / 5v s y s tem envi r onment . 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 1 1 1oe 1a1 2y4 1a2 2y3 1a3 2y2 1a4 2y1 gnd v c c 2oe 1y1 2a4 1y2 2a3 1y3 2a2 1y4 2a1 inputs output y oe a l h h l l l h x z 1 2 18 1y1 1oe 1a1 4 16 1y2 1a2 6 14 1y3 1a3 8 12 1y4 1a4 19 1 1 9 2y1 2oe 2a1 13 7 2y2 2a2 15 5 2y3 2a3 17 3 2y4 2a4 oc t a l 3-s ta te bus buffers 74 s e r ies noise cancellation ghz l o gic 1 01 / 01 / 10 potato semiconductor corporation po74g244a www.potatosemi.com
m ax i m u m ra t i n g s dc ele c t r ica l ch ara c t eri s t ic s s y m b o l d e s crip t i o n tes t c o nd i t i o n s m i n t y p m a x un i 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 h i n p u t h i g h v o l t a g e g u a r a n t e e d l o g i c h i g h l e v e l ( i n p u t p i n ) 2 - 5 . 5 v v i l i n p u t l o w v o l t a g e g u a r a n t e e d l o g i c l o w l e v e l ( i n p u t p i n ) - 0 . 5 - 0. 8 v i i h i n p u t hi g h c u rr e n t v c c = 3 . 6 v a n d v i n = 5 . 5 v - - 1 u a i i l i n p u t l o w c u rre n t v c c = 3 . 6 v a n d v i n = 0 v - - - 1 ua 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 not e s : 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 d e s c r i p t i on m ax u n i t s t o r a g e tem p e r at ur e -6 5 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 not 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 . oc t a l 3-s ta te bus buffers 74 s e r ies noise cancellation ghz l o gic 2 01 / 01 / 10 potato semiconductor corporation po74g244a www.potatosemi.com
po w er supply c h aracteristics s y m b o l d e s crip t i o n tes t c o nd i t i o n s ( 1 ) m i n t y p m a x un i t i c 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 i c c p o w e r s u p p l y c u rre n t p e r i n p u t h i g h v cc = m a x , v i n = v cc - 0 . 6 v - 50 300 ua n o t e s : 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 . 5 . v o h = v c c ? 0 . 6 v a t r a t e d c u r r e n t capacitance p a r a m e t er s ( 1 ) d e s cri p t i o n t e s t c o n d i t i o n s ty p u n i t ci n i n p u t c a p a c i t a n c e v i n = 0 v 4 p f c o u t ou t p u t c a p a c i t a n c e v o u t = 0 v 6 p f n o t e s : 1 t h i s p a r a m e t e r i s d e t e r m i n e d b y d e v i c e c h a r a c t e r i z a t i o n b u t n o t p r o d u c t i o n t e s t e 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 plh p r o p a g a t i o n d e l a y a t o y c l = 1 5 p f 1.5 ns t p h l p r o p a g a t i o n d e l a y a t o y c l = 1 5 p f 1.5 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 f m ax f p 5 1 = l c y c n e u q e r f t u p n i 300 mhz f m ax f p 50 = l c y c n e u q e r f t u p n i 100 mhz f m ax f p 5 = l c y c n e u q e r f t u p n i 750 mhz f m ax f p 2 = l c y c n e u q e r f t u p n i 1125 mhz n o t e s : 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 t p z h o r t p z l o ut p u t e n a b l e t i m e c l = 1 5 p f c l = 1 5 p f 2.5 ns 2.5 ns t ph z o r t p l z o u t p u t d i s a b l e t i m e oc t a l 3-s ta te bus buffers 74 s e r ies noise cancellation ghz l o gic 3 01 / 01 / 10 potato semiconductor corporation po74g244a www.potatosemi.com
te s t w av e f o r m s test cir c uit 50ohm 50ohm 5 0 0ohm 5 0 0ohm 50pf to 2pf oc t a l 3-s ta te bus buffers 74 s e r ies noise cancellation ghz l o gic 4 01 / 01 / 10 potato semiconductor corporation po74g244a www.potatosemi.com
oc t a l 3-s ta te bus buffers p a c k a g i ng mec h a n ic al d r a w i ng : 2 0 p i n t ss o p .252 .260 .047 1.20 .002 .006 seating plane .0256 bsc 1 20 .169 .177 0.05 0.15 4.3 4.5 6.4 6.6 0.65 0.19 0.30 .007 .012 max .018 .030 .004 .008 .238 .269 6.1 6.7 0.45 0.75 0.09 0.20 x.xx x.xx denotes dimensions in millimeters 74 s e r ies noise cancellation ghz l o gic 5 01 / 01 / 10 potato semiconductor corporation po74g244a www.potatosemi.com top-marking ic ordering information ordering code package 20pin tssop pb-free & green 20pin tssop pb-free & green po74g244asu for tube potato74g244as potato74g244as po74g244asr for tape & reel -40 c to 85 c -40 c to 85 c t a t tssop 20 16 8 t op l eft corner 39 (12?) 3000 64 (20?) 74 ic package information p a c k a ge code p a c k a ge type qty per tube t ape width (mm) t ape pi t ch (mm) pin 1 l oc a tion t ape trailer len g th qty per reel t ape leader len g th
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