1 ps8181e 09/10/04 1 2 3 4 5 6 7 gnd 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 a 1 a 3 1 b 2 2 b 2 a 5 1 b 4 2 b 4 a 7 v cc 1 b 6 2 b 6 a 9 1 b 8 2 b 8 a 11 1 b 10 2 b 10 a 10 a 12 1 b 11 2 b 11 a 8 1 b 7 2 b 7 a 6 1 b 5 2 b 5 1 b 9 2 b 9 1 b 12 2 b 12 a 4 1 b 3 2 b 3 a 2 s 1 1 b 1 2 b 1 gnd 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 features ?r on is 5-ohm typical at 3.3v ? low power: 10w ? industrial operating temperature: ?40c to +85c ? near zero propagation delay ? fast switching speed: 4.5ns max. ?v cc operating range: 3.0v to 3.6v ? 500 -ohm pulldown to unconnected b port ? series 25-ohm resistor option on all outputs ? make-before-break action ? packaging (pb-free & green available): ? 40-pin bqsop (b) description pericom semiconductor?s PI3B16224 is a 3.3v, 12-bit to 24-bit mux/ demux bus switch designed with a low on-resistance allowing inputs to be connected directly to outputs. PI3B16224 3.3v, 12-bit to 24-bit demux/mux nanoswitch ? block diagram truth table (1) pin configuration 40-pin b a1 1b1 2b1 500 ? a12 s1 1b12 2b12 500 ? b a s sw n o i t c n u f1 sa b 1 o t alb 1 b 2 o t ahb 2
2 ps8181e 09/10/04 PI3B16224 3.3v, 12-bit to 24-bit demux/mux nanoswitch ? 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1. this parameter is guaranteed but not tested on propagation delays. 2. the bus switch contributes no propagational delay other than the rc delay of the on resistance of the switch and the load capacitance. the time constant for the switch alone is of the order of 0.25ns for 50pf load. since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. propagatio nal delay of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interact ion with the load on the driven side. 3. see test circuit and waveforms. notes: 1. typical values are shown at v cc = 3.3v, +25c ambient and maximum loading. switching electrical characteristics (t a = ?40oc to +85oc, v cc = 3.0 to 3.6v) 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 h i e g a t l o v h g i h t u p n il e v e l h g i h c i g o l d e e t n a r a u g0 . 2 v v l i e g a t l o v w o l t u p n il e v e l w o l c i g o l d e e t n a r a u g5 . 0 ?8 . 0 i h i t n e r r u c h g i h t u p n iv c c v ; . x a m = n i v = c c 1 a i l i t n e r r u c w o l t u p n iv c c v ; . x a m = n i =d n g1 i h z o t n e r r u c t u p t u o e c n a d e p m i h g i h0 b , a v c c 1 v k i e g a t l o v e d o i d p m a l cv c c i , n i m = n i a m 8 1 ? =7 . 0 ?2 . 1 ? v r n o e c n a t s i s e r n o h c t i w sv c c v , . n i m = n i i , v 0 . 0 = n o a m 2 1 =58 ? r n o e c n a t s i s e r n o h c t i w sv c c v , . n i m = n i i , v 4 . 2 = n o a m 2 1 =0 15 1 c n i e c n a t i c a p a c t u p n iv n i z h m 1 = f , c 5 2 , v 0 =0 . 3 f p c n o e c n a t i c a p a c b / av n i z h m 1 = f , c 5 2 , v 0 =0 . 5 2 i c c t n e c s e i u q y l p p u s r e w o p 0 1 a dc electrical characteristics (over the operating range, t a = ?40oc to +85oc, v cc = 3.0 to 3.6v) storage temperature range, t stg ......................................... ?65oc to +150oc ambient temperature with power applied ..................... ?40oc to +85oc supply voltage range, to ground potential .................... ?0.5v to +4.6v input voltage range .......................................................... ?0.5v to +4.6v dc output current ......................................................................... 120ma power dissipation ............................................................................. 0.5w 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. maximum ratings (above which 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 4 2 2 6 1 b 3 i p s t i n u . m o c . n i m. x a m t h l p x b x o t x a y a l e d n o i t a g a p o r pc l r , f p 0 5 = l s m h o 0 0 5 = ) 3 , 2 , 1 ( ?0 5 2s p t e p e l b a n e s u b c l r , f p 0 5 = l s m h o 0 0 5 = ) 3 ( 15 . 4 s n t d p e l b a s i d s u b 10 . 5 t m e m i t k a e r b - e r o f e b - e k a mc l r , f p 0 5 = l s m h o 0 0 5 = ) 1 ( 02
3 ps8181e 09/10/04 PI3B16224 3.3v, 12-bit to 24-bit demux/mux nanoswitch ? 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 core logic cpu 100 mhz 72 72 72 bits 100 mhz 6 of 3b16224 (64 bits data, 8 bits ecc) 72:144 bus switch 128m dimm 128m dimm application circuit memory switching application pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com packaging mechanical: 40-pin bqsop (b) x.xx x.xx denotes dimension in millimeters application information logic inputs the logic control inpus can be driven up to +3.6v regardless of the supply voltage. for example, given a +3.3v supply, in may be driven low to 0v and high to 3.6v. driving in rail-torail minimizes power consumption. power-supply sequencing and hot plug information proper power-supply sequencing is advised for all cmos devices. it is recommended to always apply v cc and gnd before applying signals to the input/output or control pins. rail-to-rail is a registered trademark of nippon motorola, ltd ordering information notes : 1. thermal characteristics can be found on the world wide web at: www.pericom.com/packaging/ ordering code package code package description PI3B16224b b 40-pin bqsop PI3B16224be b pb-free & green, 40-pin bqsop
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