1 ps8180a 08/21/01 1 2 3 4 5 6 7 3a1 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 1a1 1a2 s0 gnd 2a1 2a2 vcc 3a2 4a1 4a2 5a1 5a2 6a2 gnd 6a1 7a1 7a2 2b2 s2 1b1 s1 gnd 3b2 1b2 2b1 3b1 4b1 4b2 5b1 5b2 6b2 6b1 7b1 7b2 8a1 8a2 9a1 9a2 10a2 11a2 10a1 11a1 12a1 12a2 gnd 8b1 8b2 9b1 9b2 10b2 11b2 10b1 11b1 12b1 12b2 32 31 30 29 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI3B16212 pi3b162212 (25 ohms) 3.3v, 24-bit bus exchange switch product description pericom semiconductor?s pi3b series of logic circuits are produced using the company?s advanced submicron cmos technology. the PI3B16212 and pi3b162212 are 3.3 volt, 24-bit bus exchange switches designed with low on resistance allowing inputs to be connected directly to outputs. the devices operate as a 24-bit bus switch or as a 12-bit exchanger, providing data exchange between the four signal ports via the data select pins (s0-s2). the pi3b162212 device has a built-in 25-ohm series resistor to reduce reflection noise, thus eliminating the need for an external terminating resistor. product features ? near-zero propagation delay ? 5-ohm switches connect inputs to outputs ? direct bus connection when switches are on ? fast switching speed: 5ns (max.) ?v cc operating range: 3.0v to 3.6v ? industrial operating temperature: ?40c to +85c ? packages available: ? 56-pin 240-mil wide thin plastic tssop (a) ? 56-pin 300-mil wide plastic ssop (v) product pin configuration 56-pin a, v 1a1 1b1 1a2 1b2 flow control one of twelve channels s0 s1 s2 logic block diagram product pin description note: 1. h = high voltage level l = low voltage level z = high impedance truth table n o i t c n u f2 s1 s0 s1 a2 a t c e n n o c s i dlllzz 1 b o t 1 allh1 bz 2 b o t 1 alhl2 bz 1 b o t 2 alhhz1 b 2 b o t 2 ahllz2 b t c e n n o c s i dhlhzz 2 b o t 2 a , 1 b o t 1 ahhl1 b2 b 1 b o t 2 a , 2 b o t 1 ahhh2 b1 b e m a n n i po / in o i t p i r c s e d 2 s - 0 si s t u p n i t c e l e s x a xo / ia s u b x b xo / ib s u b
2 ps8180a 08/21/01 PI3B16212 pi3b162212 3.3v, 24-bit bus-exchange switch 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 dc electrical characteristics (over the operating range, t a = ?40c to +85c, v cc = 3.0v to 3.6v) storage temperature ................................................... ?65c to +150c ambient temperature with power applied ................... ?40c to +85c supply voltage range .................................................... ?0.5v to +4.6v dc input voltage ............................................................ ?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 con- ditions for extended periods may affect reliability. capacitance (t a = 25c, f = 1 mhz) notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device. 2. typical values are at v cc = 3.3v, t a = 25c ambient and maximum loading. 3. measured by the voltage drop between a and b pin at indicated current through the switch. on resistance is determined by the lower of the voltages on the two (a,b) pins. 4. this parameter is determined by device characterization but is not production tested. 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 ) 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 i t n e r r u c t u p n i v c c v , . x a m = n i v = c c d n g r o1 a v c c v , 0 = n i v = c c 0 1 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 3 v , c c f f o s e h c t i w s1 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 s ) 3 ( v c c v , . n i m = n i , v 0 . 0 = i n o a m 4 6 = 2 1 2 6 1 ?58 w 2 1 2 2 6 1 0 28 20 4 v c c v , . n i m = n i , v 4 . 2 = i n o a m 5 1 = 2 1 2 6 1 ?0 15 1 2 1 2 2 6 1 0 25 38 4 s r e t e m a r a p ) 4 ( n o i t p i r c s e ds n o i t i d n o c t s e tp y ts t i n u c n i e c n a t i c a p a c t u p n i v n i v 0 = 0 . 3 f p c f f o f f o h c t i w s , e c n a t i c a p a c b / a 0 . 4 1 c n o n o h c t i w s , e c n a t i c a p a c b / a 0 . 0 3
PI3B16212 pi3b162212 3.3v, 24-bit bus-exchange switch 3 ps8180a 08/21/01 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 power supply characteristics notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for applicable device. 2. typical values are at v cc = 3.3v, +25c ambient. 3. this is the increase in supply current for each input that is at the specified ttl voltage level rather than v cc or gnd. 4. per ttl driven input (control inputs only); a and b pins do not contribute to i cc . 5. this current applies to the control inputs only and represent the current required to switch internal capacitance at the spec ified frequency. the a and b inputs generate no significant ac or dc currents as they transition. this parameter is not tested, but i s guaranteed by design. PI3B16212 switching characteristics over operating range notes: 1. see test circuit and waveforms. 2. this parameter is guaranteed but not tested on propagation delays. 3. 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. 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 mp y t ) 2 ( . x a ms t i n u i c c r e w o p t n e c s e i u q t n e r r u c y l p p u s v c c . x a m =v n i d n g = v r o c c ?? 0 1 a d i c c 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 r e p v c c . x a m =v n i v 0 . 3 = ) 3 ( ?? 0 5 7 i d c c t n e r r u c y l p p u s z h m r e p t u p n i r e p ) 4 ( v c c v , . x a m = n i , v 3 = n e p o s n i p b & a e l c y c y t u d % 0 5 , g n i l g g o t t u p n i l o r t n o c ?? 5 2 . 0 / a m z h m 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) 2 1 2 6 1 b 3 i p s t i n u . m o c . x a m . n i m t h l p t l h p y a l e d n o i t a g a p o r p ) 3 , 2 ( x a o t x b , x b o t x a c l , f p 0 5 = r l 5 = 0 s m h o 0 2 1 2 6 1 ? 5 2 . 0 s n 2 1 2 2 6 1?5 2 . 1 t h z p t l z p e m i t e l b a n e s u b x b r o x a o t e b c l , f p 0 5 = r l = 0 5 s m h o 0 r5 = 0 s m h o 0 15 . 4 t z h p t z l p e m i t e l b a s i d s u b x b r o x a o t e b 10 . 5
4 ps8180a 08/21/01 PI3B16212 pi3b162212 3.3v, 24-bit bus-exchange switch 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com 56-pin tssop (a) package 56-pin ssop (v) package 0.25 0.20 .025 bsc 0.635 .008 .008 .016 0-8? 0.20 0.40 .110 2.79 .010 gauge plane .291 .299 x.xx x.xx denotes dimensions in millimeters 7.39 7.59 .396 .416 10.06 10.56 .02 .04 0.51 1.01 .015 .025 0.381 0.635 .720 .730 18.29 18.54 .008 .0135 0.20 0.34 1 56 x 45? nom. max t r a pn i pe g a k c a ph t d i we r u t a r e p m e t a 2 1 2 6 1 b 3 i p 6 5 p o s s tl i m - 0 4 2 c 5 8 o t c 0 4 ? v 2 1 2 6 1 b 3 i pp o s sl i m - 0 0 3 ordering information
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