1 ps8308 07/30/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 logic block diagram product description pericom semiconductor?s pi74alvch series of logic circuits are produced in the company?s advanced 0.5 micron cmos technology, achieving industry leading speed grades. the PI74ALVCHT16245 is a 16-bit bidirectional transceiver designed for asynchronous two-way communication between data buses. the direction control input pin (xdir) determines the direction of data flow through the bidirectional transceiver. the direction and output enable controls are designed to operate this device as either two independent 8-bit transceivers or one 16-bit transceiver. the output enable (oe) input, when high, disables both a and b ports by placing them in high z condition. to ensure the high-impedance state during power up or power down, oe should be tied to vcc through a pull-up resistor; the minimum value of the resistor is determined by the current sinking ability of the driver. the PI74ALVCHT16245 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. the PI74ALVCHT16245 can be driven from either 3.3v or 5.0vdevices allowing this device to be used as a translator in a mixed 3.3/5.0v system. 1 b 0 1 a 0 1 oe 1 dir 1 b 1 1 a 1 1 b 2 1 a 2 1 b 3 1 a 3 1 b 4 1 a 4 1 b 5 1 a 5 1 b 6 1 a 6 1 b 7 1 a 7 2 b 0 2 a 0 2 oe 2 dir 2 b 1 2 a 1 2 b 2 2 a 2 2 b 3 2 a 3 2 b 4 2 a 4 2 b 5 2 a 5 2 b 6 2 a 6 2 b 7 2 a 7 PI74ALVCHT16245 3.3v 16-bit bidirectional transceiver with 3-state output product features PI74ALVCHT16245 is designed for low voltage operation v cc = 2.3v to 3.6v 5v i/o tolerant hysteresis on all inputs typical v olp (output ground bounce) < 0.8v at v cc = 3.3v, t a = 25c typical v ohv (output v oh undershoot) < 2.0v at v cc = 3.3v, t a = 25c bus hold retains last active bus state during 3-state eliminating the need for external pull-up resistors industrial operation at -40c to +85c packages available: ? 48-pin 240-mil wide plastic tssop (a) ? 48-pin 300-mil wide plastic ssop (v)
PI74ALVCHT16245 3.3v 16-bit bidirectional transceiver with 3-state outputs 2 ps8308 07/30/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 product pin description truth table (1) note: 1. h = high voltage level, x = don't care, l = low voltage level, z = high impedance e m a n n i p n o i t p i r c s e d o xe ) w o l e v i t c a ( s t u p n i e l b a n e t u p t u o e t a t s - 3 r i d xt u p n i l o r t n o c n o i t c e r i d x a x s t u p n i e t a t s - 3 r o s t u p n i a e d i s x b x s t u p t u o e t a t s - 3 r o s t u p t u o b e d i s d n gd n u o r g v cc r e w o p s t u p n i ) 1 ( s t u p t u o ) 1 ( e o x r i d x ll a s u b o t a t a d b s u b lh b s u b o t a t a d a s u b hx z product pin configuration 1 dir 1 1 b 0 2 1 b 1 3 gnd 4 1 b 2 5 1 b 3 6 v cc 7 1 b 4 8 1 b 5 9 gnd 10 1 b 6 11 1 b 7 12 2 b 0 13 2 b 1 14 gnd 15 2 b 2 16 2 b 3 17 v cc 18 2 b 4 19 2 b 5 20 gnd 21 2 b 6 22 2 b 7 23 2 dir 24 1 oe 48 1 a 0 47 1 a 1 46 gnd 45 1 a 2 44 1 a 3 43 v cc 42 1 a 4 41 1 a 5 40 gnd 39 1 a 6 38 1 a 7 37 2 a 0 36 2 a 1 35 gnd 34 2 a 2 33 2 a 3 32 v cc 31 2 a 4 30 2 a 5 29 gnd 28 2 a 6 27 2 a 7 26 2 oe 25 48-pin v48 a48 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. storage temperature .............................................. ?65c to +150c ambient temperature with power applied ........... ?40c to +85c input voltage range, v in ........................................... ?0.5v to +6.0v output voltage range, v out .................................... ?0.5v to +6.0v dc input voltage ....................................................... ?0.5v to +6.0v dc output current ................................................................. 50 ma power dissipation ..................................................................... 1.0w maximum ratings (above which the useful life may be impaired. for user guide- lines, not tested.)
3 ps8308 07/30/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI74ALVCHT16245 3.3v 16-bit bidirectional transceiver with 3-state outputs notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device type. 2. typical values are at vcc = 3.3v, +25c ambient and maximum loading. 3. unused control inputs must be held high or low to prevent them from floating. dc electrical characteristics (over the operating range, t a = C40c to +85c, v cc = 3.3v 10%) s r e t e m a r a pn o i t p i r c s e dn o i t i d n o c t s e t ) 1 ( . n i mp y t ) 2 ( . x a ms t i n u v cc e g a t l o v y l p p u s3 . 26 . 3 v v ih ) 3 ( e g a t l o v h g i h t u p n i v cc v 7 . 2 o t v 3 . 2 =7 . 15 . 5 v cc v 6 . 3 o t v 7 . 2 =0 . 25 . 5 v il ) 3 ( e g a t l o v w o l t u p n i v cc v 7 . 2 o t v 3 . 2 =7 . 0 v cc v 6 . 3 o t v 7 . 2 =8 . 0 v in ) 3 ( e g a t l o v t u p n i05 . 5 v out ) 3 ( e g a t l o v t u p t u o05 . 5 v oh e g a t l o v h g i h t u p t u o i oh 0 0 1 - = m v , a cc =. x a m o t . n i mv cc 2 . 0 - v ih i , v 7 . 1 = oh 6 - =v , a m cc =v 3 . 20 . 2 v ih i , v 7 . 1 = oh 2 1 - =v , a m cc =v 3 . 27 . 1 v ih i , v 0 . 2 = oh 2 1 - =v , a m cc =v 7 . 22 . 2 v ih i , v 0 . 2 = oh 2 1 - =v , a m cc =v 0 . 34 . 2 v ih i , v 0 . 2 = oh 4 2 - =v , a m cc =v 0 . 30 . 2 v ol e g a t l o v w o l t u p t u o i ol 0 0 1 = m v , a il =. x a m o t . n i m 2 . 0 v il i , v 7 . 0 = ol 6 =v , a m cc =v 3 . 24 . 0 v il i , v 7 . 0 = ol 2 1 =v , a m cc =v 3 . 27 . 0 v il i , v 8 . 0 = ol 2 1 =v , a m cc =v 7 . 24 . 0 v il i , v 8 . 0 = ol 4 2 =v , a m cc =v 0 . 35 5 . 0 i oh ) 3 ( t n e r r u c h g i h t u p t u o v cc v 3 . 2 = 2 1 - a m v cc v 7 . 2 =2 1 - v cc v 0 . 3 =4 2 - i ol ) 3 ( t n e r r u c w o l t u p t u o v cc v 3 . 2 =2 1 v cc v 7 . 2 =2 1 v cc v 0 . 3 =4 2 i in t n e r r u c t u p n iv in v = cc v , d n g r o cc v 6 . 3 =5 m a i in ( hold )t n e r r u c d l o h t u p n i v in v , v 8 . 0 = cc v 0 . 3 = 5 7 v in v , v 0 . 2 = cc v 0 . 3 =5 7 - v in 0 =o tv , v 6 . 3 cc v 6 . 3 =0 0 5 i oz t n e r r u c t u p t u o ) s t u p t u o e t a t s - 3 ( v out v 5 . 5 =r o, d n gv cc v 6 . 3 =0 1 c c it n e r r u c y l p p u s v cc =v 6 . 3i , out 0 = m , a v in v r o d n g = cc 0 4 d c c i r e p t n e r r u c y l p p u s h g i h l t t @ t u p n i v cc v 0 . 3 =o t6 . 3v v t a t u p n i e n o cc -v 6 . 0 v t a s t u p n i r e h t o cc d n g r o 0 5 7 c i s t u p n i l o r t n o cv in v = cc v , d n g r o cc v 3 . 3 =4 f p c io s t r o p b r o av o v = cc v , d n g r o cc v 3 . 3 =7
PI74ALVCHT16245 3.3v 16-bit bidirectional transceiver with 3-state outputs 4 ps8308 07/30/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 switching characteristics over operating range (1) operating characteristics, t a = 25c pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com s r e t e m a r a p m o r f ) t u p n i ( o t ) t u p t u o ( v c c v 2 . 0 v 5 . 2 =v c c v 7 . 2 = v c c v 3 . 0 v 3 . 3 = s t i n u . n i m ) 2 ( . x a m. n i m ( ) 2 . x a m. n i m ) 2 ( . x a m t d p b r o aa r o b0 . 10 . 50 . 40 . 16 . 3 s n t n e e oa r o b0 . 18 . 60 . 60 . 10 . 5 t s i d e oa r o b0 . 10 . 62 . 50 . 10 . 5 n o i t p i r c s e d d / t d v ) 3 ( l l a f r o e s i r n o i t i s n a r t t u p n i00 100 10 0 1v / s n s r e t e m a r a ps n o t i d n o c t s e t v cc v 2 . 0 v 5 . 2 =v cc v 3 . 0 v 3 . 3 = s t i n u l a c i p y tl a c i p y t 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 d e l b a n e s t u p t u o c l , f p 0 5 = z h m 0 1 = f 2 29 2 f p d e l b a s i d s t u p t u o45 notes: 1. see test circuit and wave forms. 2. minimum limits are guaranteed but not tested on propagation delays. 3. recommended operating condition.
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