1 ps8090c 02/07/00 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. the pi74alvch16721 is a 20-bit flip-flop with 3-state outputs designed specifically for 2.3v to 3.6v v cc operation. the pi74alvch16721 is designed with edge-triggered d-type flip- flops with qualified clock storage. on the positive transition of clock (clk) input, the device provides true data at the q outputs, provided that the clock-enable (clken) input is low. if clken is high, no data is stored. a buffered output-enable (oe) input can be used to place the 20 outputs in either a normal logic state (high or low level) or a high-impedance state. in the high-impedance state, the outputs neither load nor drive the bus lines significantly. the high-impedance state and increased drive provide the capacity to drive bus lines without the need for interface or pullup components. oe does not affect the internal operation of the flip-flops. old data can be retained or new data can be entered while the outputs are in the high-impedance state. to ensure the high-impedance state during power up or power down, oe should be tied to v cc through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. the pi74alvch16721 data 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. product features pi74alvch16721 is designed for low voltage operation v cc = 2.3v to 3.6v 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 pullup resistors industrial operation at ?40c to +85c packages available: ? 56-pin 240 mil wide plastic tssop (a) ? 56-pin 300 mil wide plastic ssop (v) logic block diagram 1 56 29 55 2 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 3.3v 20-bit flip-flop with 3-state outputs pi74alvch16721
2 ps8090c 02/07/00 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi74alvch16721 3.3v 20-bit flip-flop with 3-state outputs s t u p n is t u p t u o e on e k l ck l cx dx q lhxx q 0 ll - hh ll - ll ll h r o lxq 0 hxxx z pin name description oe output enable input (active low) clken clock enable input (active low) clk clock input (active high) dx data inputs qx 3-state outputs gnd ground v cc power product pin description truth table (1) product pin configuration notes: 1. h = high signal level l = low signal level x = don't care or irrelevant z = high impedance - = low-to-high transition 1 oe q1 q2 gnd q3 q4 vcc q5 q6 q7 gnd q8 q9 q10 q11 q12 q13 gnd q14 q15 q16 vcc q17 q18 gnd q19 q20 nc clk d1 d2 gnd d3 d4 vcc d5 d6 d7 gnd d8 d9 d10 d11 d12 d13 gnd d14 d15 d16 vcc d17 d18 gnd d19 d20 clken 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 25 26 27 28 32 31 30 29 56-pin a,v
pi74alvch16721 3.3v 20-bit flip-flop with 3-state outputs 3 ps8090c 02/07/00 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 storage temperature ........................................................... ?65c to +150c ambient temperature with power applied ........................ ? 40c to +85c input voltage range, v in ...................................................... ?0.5v to v cc +0.5v output voltage range, v out ............................................... ?0.5v to v cc +0.5v dc input voltage .................................................................... ?0.5v to +5.0v dc output current ............................................................................ 100 ma power dissipation .................................................................................. 1.0w note: stresses greater than those listed under maximum rat- ings 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 ex- tended periods may affect reliability. dc electrical characteristics (over the operating range, t a = ?40c to +85c, v cc = 3.3v 10%) maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) 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 c c e g a t l o v y l p p u s3 . 26 . 3 v v h i ) 3 ( e g a t l o v h g i h t u p n i v c c v 7 . 2 o t v 3 . 2 =7 . 1 v c c v 6 . 3 o t v 7 . 2 =0 . 2 v l i ) 3 ( e g a t l o v w o l t u p n i v c c v 7 . 2 o t v 3 . 2 =7 . 0 v c c v 6 . 3 o t v 7 . 2 =8 . 0 v n i ) 3 ( e g a t l o v t u p n i0v c c v t u o ) 3 ( e g a t l o v t u p t u o0v c c v h o t u p t u o h g i h e g a t l o v i h o 0 0 1 - = m v , a c c =. x a m o t . n i mv c c 2 . 0 - v h i i , v 7 . 1 = h o 6 - =v , a m c c =v 3 . 20 . 2 v h i i , v 7 . 1 = h o 2 1 - =v , a m c c =v 3 . 27 . 1 v h i i , v 0 . 2 = h o 2 1 - =v , a m c c =v 7 . 22 . 2 v h i i , v 0 . 2 = h o 2 1 - =v , a m c c =v 0 . 34 . 2 v h i i , v 0 . 2 = h o 4 2 - =v , a m c c =v 0 . 30 . 2 v l o t u p t u o w o l e g a t l o v i l o 0 0 1 = m v , a l i =. x a m o t . n i m2 . 0 v l i i , v 7 . 0 = l o 6 =v , a m c c =v 3 . 24 . 0 v l i i , v 7 . 0 = l o 2 1 =v , a m c c =v 3 . 27 . 0 v l i i , v 8 . 0 = l o 2 1 =v , a m c c =v 7 . 24 . 0 v l i i , v 8 . 0 = l o 4 2 =v , a m c c =v 0 . 35 5 . 0 i h o ) 3 ( t u p t u o h g i h t n e r r u c v c c v 3 . 2 =2 1 - a m v c c v 7 . 2 =2 1 - v c c v 0 . 3 =4 2 - i l o ) 3 ( t u p t u o w o l t n e r r u c v c c v 3 . 2 =2 1 v c c v 7 . 2 =2 1 v c c v 0 . 3 =4 2
4 ps8090c 02/07/00 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi74alvch16721 3.3v 20-bit flip-flop with 3-state outputs notes: 1. for conditions shown as max. or min., use appropriate value specified under electrical characteristics for the applicable dev ice type. 2. typical values are at v cc = 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- continued (over the operating range, t a = ?40c 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 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 n i t n e r r u c t u p n iv n i v = c c v , d n g r o c c v 6 . 3 =5 m a i n i ( hold ) t u p n i d l o h t n e r r u c v n i v , v 7 . 0 = c c v 3 . 2 =5 4 v n i v , v 7 . 1 = c c v 3 . 2 =5 4 - v n i v , v 8 . 0 = c c v 0 . 3 =5 7 v n i v , v 0 . 2 = c c v 0 . 3 =5 7 - v n i 0 =o tv , v 6 . 3 c c v 6 . 3 =0 0 5 i z o ) s t u p t u o e t a t s - 3 ( t n e r r u c t u p t u ov t u o v = c c r o, d n gv c c v 6 . 3 =0 1 i c c t n e r r u c y l p p u s v c c =v 6 . 3i , t u o 0 = m , a v n i v r o d n g = c c 0 4 d i c c t u p n i r e p t n e r r u c y l p p u s h g i h l t t @ v c c v 0 . 3 =o t6 . 3v v t a t u p n i e n o c c -v 6 . 0 v t a s t u p n i r e h t o c c d n g r o 0 5 7 c i s t u p n i l o r t n o c v n i v = c c v , d n g r o c c v 3 . 3 = 3 f p s t u p n i a t a d6 c o s t u p t u ov o v = c c v , d n g r o c c v 3 . 3 =7
pi74alvch16721 3.3v 20-bit flip-flop with 3-state outputs 5 ps8090c 02/07/00 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 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 ) 1 ( 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 f k c o l c y c n e u q e r f k c o l c c l f p 0 5 = r l 0 0 5 = w 00 5 100 5 10 0 5 1 z h m f x a m y c n e u q e r f m u m i x a m0 5 10 5 10 5 1 t h l p t , l h p y a l e d n o i t a g o p o r p x q o t k l c 0 . 1 6 . 5 0 . 1 1 . 5 0 . 1 3 . 4 s n t h z p t , l z p e m i t e l b a n e t u p t u o x q o t e o 1 . 68 . 58 . 4 t x h p e m i t e l b a s i d t u p t u o x q o t e o 5 . 57 . 44 . 4 t u s k l c e r o f e b a t a d - 46 . 31 . 3 t u s k l c e r o f e b n e k l c - 4 . 31 . 37 . 2 t h k l c r e t f a a t a d - 000 t h k l c r e t f a n e k l c - 000 t w h t d i w e s l u p ) 3 ( w o l r o h g i h k l c 3 . 33 . 33 . 3 d / t d v ) 4 ( 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 switching characteristics over operating range (1) pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com operating characteristics, t a = 25 o c r e t e m a r a ps n o i t i d n o c t s e t v c c v 2 . 0 v 5 . 2 =v c c v 3 . 0 v 3 . 3 = s t i n u . 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 z h m 0 1 = f , f p 0 5 = 5 59 5 f p d e l b a s i d s t u p t u o6 49 4 notes: 1. see test circuit and waveforms. 2. minimum limits are guaranteed but not tested on propagation delays. 3. recommended operating condition.
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