1 psxxxx 04/20/98 product description: pericom semiconductor?s pi74alpt series of logic circuits are produced using the company?s advanced 0.35 micron cmos technology, achieving industry leading speed. the pi74alpt16244 buffer/driver is designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. the device can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. it provides true outputs and symmetrical active-low output-enable (oe) inputs. to ensure the high-impedance state during power up or power down, oe should be tied to vcc through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. the family is i/o tolerant, allowing it to operate in mixed 1.8/3.6v systems.the family has ?bus hold,? which retains the data input?s last state whenever the data input goes to high-impedance, preventing ?floating? inputs and eliminating the need for pullup/down resistors. 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012 12345678901 2 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 product features: ? pi74alpt family is designed for low voltage operation, v dd = 1.8v to 3.6v ? supports live insertion ? 3.6v tolerant inputs and outputs ? bus hold ? high drive, -32/64ma @ 3.3v ? typical v olp (output ground bounce) < 0.6v at v dd = 2.5v, t a = 25c ? typical v ohv (output v oh undershoot) <- 0.6v at v dd = 2.5v, t a = 25c ? industrial operation at ?40c to +85c ? packages available: ? 48-pin 240 mil wide plastic tssop (a48) ? 48-pin 173 mil wide plastic tvsop (k48) ? 48-pin 300 mil wide plastic ssop (v48) pi74alpt16244 1.8/2.5/3.3v 16-bit buffer/driver with 3-state outputs logic block diagram 2 y 1 2 y 2 2 y 3 2 y 4 4 y 1 4 y 2 4 y 3 4 y 4 3 y 1 3 y 2 3 y 3 3 y 4 1 y 4 1 y 3 1 y 2 1 y 1 1 oe 1 a 1 1 a 2 1 a 3 1 a 4 3 oe 3 a 1 3 a 2 3 a 3 3 a 4 2 oe 2 a 1 2 a 2 2 a 3 2 a 4 4 oe 4 a 1 4 a 2 4 a 3 4 a 4 43 44 46 47 1 37 38 40 41 48 12 11 9 8 6 5 3 2 32 33 35 36 25 17 16 14 13 26 27 29 30 24 23 22 20 19 target specification
2 psxxxx 04/20/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi74alpt16244 16-bit buffer driver with 3-state outputs target specification s t u p n is t u p t u o e o na n x x y n lh h ll l hx z pin name description noe 3-state output enable inputs (active low) nax inputs nyx 3-state outputs gnd ground v cc power product pin description truth table (1) note: 1. h = high signal level l = low signal level x = don?t care or irrelevant z = high impedance product pin configuration 1 oe 1 y 1 1 y 2 gnd 1 y 3 1 y 4 v cc 2 y 1 2 y 2 gnd 2 y 3 2 y 4 3 y 1 3 y 2 gnd 3 y 3 3 y 4 v cc 4 y 1 4 y 2 gnd 4 y 3 4 y 4 4 oe 1 2 3 4 5 6 7 8 9 48 10 47 11 46 12 45 13 44 14 43 15 42 16 41 17 40 18 39 19 38 20 37 21 36 22 35 23 34 24 33 32 31 30 29 28 27 26 25 2 oe 1 a 1 1 a 2 gnd 1 a 3 1 a 4 v cc 2 a 1 2 a 2 gnd 2 a 3 2 a 4 3 a 1 3 a 2 gnd 3 a 3 3 a 4 v cc 4 a 1 4 a 2 gnd 4 a 3 4 a 4 3 oe 48-pin a, v, k
3 psxxxx 04/20/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi74alpt16244 16-bit buffer driver with 3-state outputs target specification 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 con- ditions for extended periods may affect reliability. supply voltage range, v dd ............................................... ?0.5v to 4.6v input voltage range, v i ..................................................... ?0.5v to 4.6v output voltage range, v o (3-stated) ................................ ?0.5v to 4.6v output voltage range, v o (1) (active) ....................... ?0.5v to v dd +0.5v dc input diode current (i ik ) v i <0v ............................................ ?50ma dc output diode current (i ok ) v o <0v ....................................................................................... ?50ma v o >v dd .................................................................................... +50ma dc output source/sink current (i oh /i ol ) ............................ ?64/128ma dc v dd or gnd current per supply pin (i cc or gnd) ............... 100ma storage temperature range, t stg .............................. ?65c to150c recommended operating conditions 2 maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) notes 1. absolute maximum of i o must be observed. 2. unused control inputs must be held high or low to prevent them from floating. 3 as measured between 0.8v and 2.0v, v dd = 3.0v. . n i m. x a mt i n u v d d e g a t l o v y l p p u s g n i t a r e p o8 . 16 . 3 v y l n o n o i t n e t e r a t a d2 . 16 . 3 v h i e g a t l o v t u p n i l e v e l - h g i hv d d v 6 . 3 o t v 7 . 2 =0 . 2 v l i e g a t l o v t u p n i l e v e l - w o lv d d v 6 . 3 o t v 7 . 2 =8 . 0 v i e g a t l o v t u p n i 3 . 0 -6 . 3 v o e g a t l o v t u p t u o e t a t s e v i t c a0v d d e t a t s f f o06 . 3 i o i n i t n e r r u c t u p t u o h o i / l o v d d v 6 . 3 o t v 0 . 3 = v d d v 0 . 3 o t v 7 . 2 = v d d v 7 . 2 o t v 3 . 2 = v d d v 8 . 1 = 4 6 / 2 3 - 4 2 8 1 6 a m d / t d ve t a r l l a f r o e s i r n o i t s i s n a r t t u p n i ) 3 ( 00 1v / s n t a e r u t r e p m e t r i a - e e r f g n i t a r e p o 0 4 -5 8c
4 psxxxx 04/20/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi74alpt16244 16-bit buffer driver with 3-state outputs target specification electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) dc characteristics (2.7v 5 psxxxx 04/20/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi74alpt16244 16-bit buffer driver with 3-state outputs target specification dc characteristics (2.3v v dd 2.7v) notes 1. not guaranteed 2. duration of test must not exceed 1 second with only 1 output tested at a time. n o i t p i r s s e ds r e t e m a r a ps n o i t i d n o cv d d . n i m. p y t. x a ms t i n u v h i e g a t l o v t u p n i l e v e l h g i h 7 . 2 - 3 . 2 6 . 1 v v l i e g a t l o v t u p n i l e v e l w o l 7 . 0 v h o e g a t l o v t u p t u o l e v e l h g i h i h o 0 0 1 ? = m av d d ?2 . 0 i h o a m 2 1 ? = 3 . 2 8 . 1 i h o a m 8 1 ? =7 . 1 v l o e g a t l o v t u p t u o l e v e l w o l i l o 0 0 1 = m a7 . 2 - 3 . 22 . 0 i l o a m 2 1 = 3 . 2 4 . 0 i l o a m 8 1 =5 . 0 i l o a m 4 2 =5 5 . 0 i i t n e r r u c e g a k a e l t u p n iv 1 v = d d d n g r o7 . 20 . 5 m a i z o e g a k a e l t u p t u o e t a t s - 3v o 6 . 3 = v3 . 20 1 i f f o t n e r r u c e g a k a e l f f o - r e w o pv i v r o o 6 . 3 v0 0 1 i l d o w o l t n e r r u c t u p t u o v n i = v h i r ov , l i v o =v 5 . 1 ) 2 ( 7 . 2 0 1 14 6 2 a m i h d o h g i h t n e r r u c t u p t u o v n i = v h i r o v , l i v o =v 5 . 1 ) 2 ( 0 3 ?0 6 ? i d l o h ) 1 ( t n e r r u c d l o h s u b s t u p t u o b r o a v i v 7 . 0 = 5 . 2 0 9 m a v i v 7 . 1 =0 9 ? i d d t n e r r u c y l p p u s t n e c s e i u q v i v = d d d n g r o 7 . 2 - 3 . 2 0 2 v d d v ( i v , o ) v 6 . 30 2 i d d d n i e s a e r c n ii d d t u p n i r e p v h i v = d d , v 6 . 0 - v t a s t u p n i d d d n g r o d b t
6 psxxxx 04/20/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi74alpt16244 16-bit buffer driver with 3-state outputs target specification dc characteristics (1.8v v dd 2.3v) note: 1. not guaranteed 2. duration of test must not exceed 1 second with only 1 output tested at a time. n o i t p i r c s e ds r e t e m a r a ps n o i t i d n o cv d d . n i m. p y t. x a ms t i n u v h i e g a t l o v t u p n i l e v e l h g i h 3 . 2 - 8 . 1 x 7 . 0v d d v v l i e g a t l o v t u p n i l e v e l w o l v x 2 . 0 d d v h o l e v e l h g i h e g a t l o v t u p t u o i h o 0 0 1 ? = m a 8 . 1 v d d 2 . 0 - i h o a m 6 ? =4 . 1 v l o l e v e l w o l e g a t l o v t u p t u o i l o 0 0 1 = m a2 . 0 i l o a m 6 =3 . 0 i i t n e r r u c e g a k a e l t u p n iv 1 v = d d d n g r o3 . 20 . 5 m a i z o e g a k a e l t u p t u o e t a t s - 3v o 6 . 3 = v8 . 10 1 i f f o e g a k a e l f f o - r e w o p t n e r r u c v i v = o 6 . 3 v0 0 1 i l d o w o l t n e r r u c t u p t u ov n i = v h i r ov , l i v o =v 9 . 0 ) 2 ( 8 . 1 0 57 3 1 a m i h d o h g i h t n e r r u c t u p t u ov n i = v h i r ov , l i v o =v 9 . 0 ) 2 ( 4 1 ?4 3 ? i d l o h ) 1 ( t n e r r u c d l o h s u b s t u p t u o b r o a v i 4 . 0 = 8 . 1 0 5 m a v i 3 . 1 =0 5 ? i d d t n e r r u c y l p p u s t n e c s e i u q v i v = d d d n g r o0 2 v d d v ( i v , o ) v 6 . 30 2 i d d d n i e s a e r c n ii d d t u p n i r e p v i v = d d , v 6 0 - v t a s t u p n i r e h t o d d d n g r o d b t
7 psxxxx 04/20/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi74alpt16244 16-bit buffer driver with 3-state outputs target specification ac electrical characteristics note 1. skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of th e same device. the specification applies to any outputs switching in the same direction, either high or low (t oshl ) or low to high (t oslh ). dynamic switching characteristics (target spec, eng. ref only) capacitance l o b m y sr e t e m a r a p t a c , c 5 8 + o t c 0 4 - = l r , f p 0 5 = l 0 0 5 = w w w w w s t i n u v d d v 3 . 0 v 3 . 3 =v d d v 2 . 0 v 5 . 2 =v d d v 8 . 1 = . n i m. x a m. n i m. x a m. n i m. x a m t l h p t , h l p y a l e d p o r p8 . 05 . 20 . 10 . 35 . 10 . 5 s n t l z p t , h z p e m i t e l b a n e t u p t u o0 . 15 . 30 . 21 . 45 . 15 . 6 t z l p t , z h p e m i t e l b a s i d t u p t u o5 . 15 . 35 . 18 . 35 . 10 . 5 t , l h s o t h l s o w e k s t u p t u o o t t u p t u o ) 1 ( 5 . 05 . 05 . 0 l o b m y sr e t e m a r a ps n o i t i d n o cv d d t a c 5 2 + = l a c i p y t s t i n u v p l o v k a e p c i m a n y d t u p t u o t e i u q l o c l v , f p 0 5 = h i v = d d v , l i v 0 = 8 . 1 5 . 2 3 . 3 5 2 . 0 6 . 0 8 . 0 v v v l o v y e l l a v c i m a n y d t u p t u o t e i u q l o c l v , f p 0 5 = h i v = d d v , l i v 0 = 8 . 1 5 . 2 3 . 3 5 2 . 0 ? 6 . 0 ? 8 . 0 ? v v h o v y e l l a v c i m a n y d t u p t u o t e i u q h o c l v , f p 0 5 = h i v = d d v , l i v 0 = 8 . 1 5 . 2 3 . 3 5 . 1 9 . 1 2 . 2 l o b m y sr e t e m a r a ps n o i t i d n o ct a l a c i p y t , c 5 2 + =s t i n u c n i e c n a t i c a p a c t u p n iv d d v , v 3 . 3 r o v 5 . 2 , 8 . 1 = i v r o v 0 = d d 6 f p c t u o e c n a t i c a p a c t u p t u ov i v r o v 0 = d d v , d d v 3 . 3 r o v 5 . 2 , v 8 . 1 =7 c d p n o i t a p i s s i d r e w o p e c n a t i c a p a c v i v r o v 0 = d d z h m 0 1 = f , v d d v 3 . 3 r o v 5 . 2 , v 8 . 1 = 0 2
8 psxxxx 04/20/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi74alpt16244 16-bit buffer driver with 3-state outputs target specification test circuits and switching waveforms parameter measurement information (v dd = 1.8v - 3.6v) setup, hold, and release timing pulse width switch position propagaton delay enable disable timing data input t h v dd t su 0v timing input v dd 0v v dd/2 v dd/2 low-high-low pulse t w high-low-high pulse v dd 0v v dd 0v v dd/2 v dd/2 input opposite phase input transition t plh t phl t plh t phl v dd 0v v dd v ol v dd 0v output v dd/2 v dd/2 v dd/2 notes: a. c l includes probe and jig capacitance. b. waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. c. all input pulses are supplied by generators having the following characteristics: prr 10 mhz, z o = 50 w , t r 2ns, t f 2ns, measured from 10% to 90%, unless otherwise specified. d. the outputs are measured one at a time with one transition per measurement. pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com output control (active low) output waveform 2 s1 at gnd (see note b) t pzl t plz v dd 0v v dd v ol 0v output waveform 1 s1 at 2xv dd (see note b) +0.15v -0.15v v oh v dd t phz t pzh v dd/2 v dd/2 v dd /2 c l r 1 500 w 50pf from output under test gnd 2 x v dd open (see note a) r l 500 w t s e t1 s td pn e p o t z l p /t l z p x 2vd d t z h p /t h z p d n g
|
