1 ps8429b 12/10/99 nc 1 2 3 4 5 6 7 8 9 gnd 10 11 12 13 14 15 16 17 18 19 20 gnd be1 80 79 78 77 76 75 v cc 74 73 72 71 70 69 68 67 66 65 64 63 62 b 15 61 a 0 a 1 a 2 a 3 a 4 a 5 a 6 a 7 nc a 8 a 9 a 10 a 11 a 12 a 13 a 14 a 15 b 14 b 13 b 12 b 11 b 10 b 9 b 8 be2 v cc b 0 b 1 b 2 b 3 b 4 b 5 b 6 b 7 nc 21 22 23 24 25 26 27 28 29 gnd 30 31 32 33 34 35 36 37 38 39 40 gnd be3 60 59 58 57 56 55 v cc 54 53 52 51 50 49 48 47 46 45 44 43 42 b 31 41 a 16 a 17 a 18 a 19 a 20 a 21 a 22 a 23 nc a 24 a 25 a 26 a 27 a 28 a 29 a 30 a 31 b 30 b 29 b 28 b 27 b 26 b 25 b 24 be4 v cc b 16 b 17 b 18 b 19 b 20 b 21 b 22 b 23 product description pericom semiconductor?s pi3c series of logic circuits are produced using the company?s advanced submicron cmos technology, achieving industry leading performance. the pi3c34x245 is a 2.5v or 3.3v, 32-bit, 2-port bus switch designed with a low on resistance (5 w ) allowing inputs to be connected directly to outputs. the bus switch creates no additional propagational delay or additional ground bounce noise. the switches are turned on by the bus enable (be) input signal. it is very useful in switching signals that have high bandwidth (>400 mhz). logic block diagram product pin description pin name description ben bus enable input (active low) a0 ? a31 bus a b0 ? b31 bus b product pin configuration product features ? near zero propagation delay ?5 w switches connect inputs to outputs ? 2.5v supply voltage operation ? permits hot insertion ? 5v i/o tolerant ? high bandwidth operation (>400 mhz) ? packages available: ? 80-pin 150 mil wide plastic bqsop (b) 80-pin b be 1 a7 a0 b7 b0 be 2 a15 a8 b15 b8 be 3 a23 a16 b23 b16 be 4 a31 a24 b31 b24 pi3c34x245 2.5v/3.3v, high bandwidth, hot insertion 32-bit, 2-port, bus switch 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012
pi3c34x245 2.5v/3.3v, high bandwidth, hot insertion, 32-bit, 2-port, bus switch 2 ps8429b 12/10/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 dc electrical characteristics (over operating range, t a = C40c to +85c, v cc = 3.3v 10%) parameters description test conditions (1) min. typ. (2) max. units v ih input high voltage guaranteed logic high level 2.0 v il input low voltage guaranteed logic low level C0.5 0.8 i ih input high current v cc = max., v in = v cc 1 i il input low current v cc = max., v in = gnd 1 a i ozh high impedance output current 0 a, b v cc 1 v ik clamp diode voltage v cc = min., i in = C18ma C0.73 C1.2 v r on switch on resistance (3) v cc = min., v in = 0.0v, i on = 48ma 5 7 w v cc = min., v in = 2.4v, i on = 15ma 8 15 storage temperature ........................................................ ?65c to +150c ambient temperature with power applied ......................... ?40c to +85c supply voltage to ground potential (inputs & v cc only) ........ ?0.5v to +4.6v supply voltage to ground potential (outputs & d/o only) ...... ?0.5v to +4.6v dc input voltage .................................................................. ?0.5v to +5.5v 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 the useful life may be impaired. for user guidelines, not tested.) parameters (4) description test conditions typ. units c in input capacitance v in = 0v 3.5 c off a/b capacitance, switch off v in = 0v 5.0 pf c on a/b capacitance, switch on v in = 0v 10.0 notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device type. 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. v capacitance (t a = 25c, f = 1 mhz)
pi3c34x245 2.5v/3.3v, high bandwidth, hot insertion, 32-bit, 2-port, bus switch 3 ps8429b 12/10/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 power supply characteristics parameters description test conditions (1) min. typ. (2) max. units i cc quiescent power v cc = max. v in = gnd or v cc 1.0 2.0 supply current d i cc supply current per v cc = max. v in = 3.0v (3) 2.5 input high 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, +25c ambient. 3. per driven input (control input only); a and b pins do not contribute to d i cc . switching characteristics over 3.3v operating range ma 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 5 4 2 x 4 3 c 3 1 p s t i n u . m o c . n i m. x a 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 b o t x a c l f p 0 5 = r l 0 0 5 = w 5 2 . 0 s n 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 0 5 = w 0 0 5 = r w 5 . 18 . 9 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 5 . 13 . 8 switching characteristics over 2.5v operating range 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 5 4 2 x 4 3 c 3 1 p s t i n u . m o c . n i m. x a 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 b o t x a c l f p 0 5 = r l 0 0 5 = w 5 2 . 0 s n 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 0 5 = w 0 0 5 = r w 5 . 15 . 6 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 5 . 15 . 5 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 timesof typical driving signals, it adds very little propagational delay to the system. propagational 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 interaction with the load on the driven side.
pi3c34x245 2.5v/3.3v, high bandwidth, hot insertion, 32-bit, 2-port, bus switch 4 ps8429b 12/10/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 t r a pe g a k c a p - n i ps n o i s n e m i d b 5 4 2 x 4 3 c 3 i p) b ( p o s q b - 0 8c 5 8 + o t c 0 4 ? 4.0 2.0 0.0 0.0 1.0 2.0 3.0 4.0 5.0 v out , (v) v in , (v) v cc = 3.3v 3.1v 2.9v 2.7v 2.5v 2.3v 3.6v 3.8v 3.4v 3.2v 3.0v 2.8v output voltage vs. input voltage over various supply voltages ordering information pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com
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