1 ps8162d 05/09/06 pi3c3245 2.5v/3.3v, high bandwidth, hot insertion 8-bit, 2-port, bus switch 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012 12345678901 2 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 v cc nc 1 20 be a0 2 19 b0 a1 3 18 b1 a2 4 17 b2 a3 5 16 b3 a4 6 15 b4 a5 7 14 b5 a6 8 13 b6 a7 9 12 b7 gnd 10 11 description pericom semiconductor?s pi3c3245 is a 2.5 volt or 3.3 volt 8-bit, 2-port bus switch designed with a low on-resistance (5-ohm) 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). function be a0?7 disconnect h hi-z connect l b0?7 truth table (1) note: 1. h = high voltage level l = low voltage level hi-z = high impedance block diagram pin description pin name description be bus enable input (active low) a0?7 bus a b0?7 bus b gnd ground v cc power pin configuration features ? near-zero propagation delay ? 5-ohm switches connect inputs to outputs ? high bandwidth operation (>400 mhz) ? permits hot insertion ? 5v i/o tolerant ? rail-to-rail 3.3v or 2.5v switching ? 2.5v supply voltage operation ? packaging (pb-free & green available): ? 20-pin 150 mil wide plastic qsop (q) ? 20-pin 173 mil wide plastic tssop (l) be a7 a0 b7 b0 06-0244
2 ps8162d 05/09/06 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3c3245 2.5v/3.3v, high bandwidth, hot insertion, 8-bit, 2-port, bus switch 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 de- vice. this is a stress rating only and functional opera- tion 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.) dc electrical characteristics (over operating range, t a = ?40c 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 ?0.5 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 (3) high impedance output current 0 a, b v cc 1 v ik clamp diode voltage v cc = min., i in = ?18ma ?0.73 ?1.2 v r on switch on resistance (4) v cc = min., v in = 0.0v, i on = 48ma 5 7 v cc = min., v in = 2.4v, i on = 15ma 8 15 parameters (1) 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. this parameter is determined by device characterization but is not production tested. v 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 type. 2. typical values are at v cc = 3.3v, t a = 25c ambient and maximum loading. 3. not more than one output should be shorted at one time. duration of the test should not exceed one second. 4. 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. 06-0244
pi3c3245 2.5v/3.3v, high bandwidth, hot insertion, 8-bit, 2-port, bus switch 3 ps8162d 05/09/06 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3c3245 com. parameters description conditions min. max. units t plh propagation delay (1,2) c l = 50pf 0.25 t phl ax to bx r l = 500-ohm t pzh bus enable time 1.5 6.5 ns t pzl be to ax or bx c l = 50pf t phz bus disable time r l = 500-ohm 1.5 5.5 t plz be to ax or bx r = 500-ohm 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 260 500 supply current i cc supply current per v cc = max. v in = 3.0v (3) 750 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 i cc . switching characteristics over 3.3v operating range a pi3c3245 com. parameters description conditions min. max. units t plh propagation delay (1,2) c l = 50pf 0.25 t phl ax to bx r l = 500-ohm t pzh bus enable time 1.5 9.8 ns t pzl be to ax or bx c l = 50pf t phz bus disable time r l = 500-ohm 1.5 8.3 t plz be to ax or bx r = 500-ohm switching characteristics over 2.5v operating range notes: 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. 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. notes: 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. 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. 06-0244
4 ps8162d 05/09/06 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3c3245 2.5v/3.3v, high bandwidth, hot insertion, 8-bit, 2-port, bus switch 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 output voltage vs. input voltage over various supply voltages packaging mechanical: 20-pin 150-mil wide plastic qsop (q) .337 .344 .053 .069 .004 .010 seating plane .025 bsc .007 .010 .228 .244 .150 .157 1 20 .016 .050 x.xx x.xx denotes dimensions in millimeters 0.635 8.56 8.74 1.35 1.75 5.79 6.19 0.41 1.27 0.101 0.254 .008 .012 0.203 0.305 3.81 3.99 0.178 0.254 .058 1.47 .015 x 45? 0.38 ref detail a detail a .008 0.20 min. guage plane .010 0.254 .041 1.04 ref .016 .035 0.41 0.89 0?-6? .008 .013 0.20 0.33 06-0244
pi3c3245 2.5v/3.3v, high bandwidth, hot insertion, 8-bit, 2-port, bus switch 5 ps8162d 05/09/06 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 packaging mechanical: 20-pin 173-mil wide plastic tssop (l) .252 .260 .047 1.20 .002 .006 seati n g pla n e .0256 bsc .01 8 .030 .004 .00 8 .23 8 .269 1 20 .169 .177 0.05 0.15 6.1 6.7 0.45 0.75 0.09 0.20 4.3 4.5 6.4 6.6 0.65 0.19 0.30 .007 .012 max notes: ? thermal characteristics can be found on the company web site at www.pericom.com/packaging/ ? e = pb-free & green ? adding an x suffix = tape/reel ordering information ordering code package code package type pi3c3245q q 20-pin qsop pi3c3245qe q pb-free & green, 20-pin qsop pi3c3245l l 20-pin tssop PI3C3245LE l pb-free & green, 20-pin tssop pericom semiconductor corporation ? 1-800-435-2336 ? www.pericom.com 06-0244
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