1 ps8150g 03/02/09 pi3b3251 3.3v, 8:1 mux/demux nanoswitch ? features ? near-zero propagation delay ? 5 switches connect inputs to outputs ? ultra low quiescent power (0.1 a typical) ? ideally suited for notebook applications ? pin compatible with 74 series 251 logic devices ? packaging (pb-free & green available): ? 16-pin 150-mil wide plastic qsop (q) ? 16-pin 173-mil wide plastic tssop (l) truth table (1) e select y function s2 s1 s0 hxxx hi-z disable lllli 0 s2-0 = 0 lllhi 1 s2-0 = 1 llhli 2 s2-0 = 2 llhhi 3 s2-0 = 3 lhlli 4 s2-0 = 4 lhlhi 5 s2-0 = 5 lhhli 6 s2-0 = 6 lhhhi 7 s2-0 = 7 block diagram description pericom semiconductor?s pi3b3251 is a 3.3v dual 8:1 multiplexer/ demultiplexer with three-state outputs that is pinout compatible with the pi74fct251t, 74f251, and 74als/as/ls 251. inputs can be connected to outputs with low on-resistance (5 ) with no additional ground bounce noise or propagation delay. pin con guration pin description pin name description i 0 ? 7 data inputs s 0 ? 2 select inputs e enable y data outputs gnd ground v cc power nc no connect note: 1. h = high voltage level, l = low voltage level i0 e s0 s1 s2 i1 i2 i3 i4 i5 i6 i7 y iy e sw sw sw sw sw sw sw sw sw 1 2 3 4 5 16 6 15 7 14 8 13 12 11 10 9 v cc i 4 i 5 i 6 i 7 s 0 s 1 s 2 i 3 i 2 i 1 i 0 y nc e gnd 09-0037
pi3b3251 3.3v, 8:1 mux/demux nanoswitch ? 2 ps8150g 03/02/09 capacitance (t a = 25c, f = 1 mhz) parameters (1) de scrip tion test conditions typ. units c in input capacitance v in = 0v 3.0 pf c i(off) i 0 - i 7 capacitance, switch off 8.0 c y(off) y capacitance, switch off 64.0 c i(on) i 0 - i 7 capacitance, switch on 72.0 note: 1. this parameter is determined by device characterization but is not production tested. storage temperature ..................................................................... ?65c to +150c ambient temperature with power applied .................................... ?40c to +85c supply voltage to ground potential ................................................ ?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 max i mum ratings may cause per ma nent dam age to the device. this is a stress rating only and func tion al op er a tion of the device at these or any other condi- tions above those indicated in the operational sec- tions of this speci cation is not implied. ex po sure to absolute maximum rating conditions for ex tend ed periods may affect reliability. maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) dc electrical characteristics (over the operating range, t a = ?40c to +85c, v cc =3.3v 10%) parameters de scrip tion test conditions (1) min. typ (2) max. units v ih input high voltage guaranteed logic high level 2.0 v 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 a i il input low current v cc = max., v in = gnd 1 i ozh high impedance output current 0 i n , y v cc 1 v ik clamp diode voltage v cc = min., i in = ?18ma ?1.2 v r on switch on-resistance (3) v cc = min., v in = 0.0v, i on = 48ma or 64ma 58 v cc = min., v in = 2.4v, i on = 15ma 10 17 notes: 1. for max. or min. conditions, use appropriate value speci ed 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 i and y pin at indicated current through the switch. on-resistance is determined by the lower of the voltages on the two (i,y) pins. 09-0037
pi3b3251 3.3v, 8:1 mux/demux nanoswitch ? 3 ps8150g 03/02/09 switching characteristics over operating range parameters de scrip tion conditions com. units min. max. t pd propagation delay (1,2) , in to y c l = 50pf r l = 500 0.25 ns t sy bus enable time, sn to y 1 4.5 t pzh t pzl bus enable time, e to y 1 3.5 t phz t plz bus disable time, e to y 1 5.5 power supply characteristics parameters de scrip tion test conditions (1) min. typ. (2) max. units i cc quiescent power supply current v cc = max. v in = gnd or v cc 0.1 3 a i cc supply current per input @ ttl high v cc = max. v in = 3.0v (3) 750 notes: 1. for max. or min. conditions, use appropriate value speci ed under electrical characteristics for the applicable device. 2. typical values are at v cc = 3.3v, +25c ambient. 3. per ttl driven input (control input only); i and y pins do not contribute to i cc . 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 ca pacitance. 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. applications information logic inputs the logic control inputs can be driven up to +3.6v re gard less 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-to-rail ? minimizes power consumption. power-supply sequencing and hot-plug in for ma tion proper power-supply sequencing is recommended for all cmos devices. always apply v cc and gnd before applying signals to input/output or control pins. rail-to-rail is a registered trademark of nippon motorola, ltd. 09-0037
pi3b3251 3.3v, 8:1 mux/demux nanoswitch ? 4 ps8150g 03/02/09 packaging mechanical: 16-pin qsop (q) 1 .189 .197 .053 .069 .004 .010 seating plane .025 bsc .007 .010 .228 .244 1 16 .150 .157 x.xx x.xx denotes dimensions in millimeters 0.635 4.80 5.00 1.35 1.75 5.79 6.19 0.101 0.254 .008 .012 0.203 0.305 3.81 3.99 0.178 0.254 0.38 .008 0.203 .015 x 45 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 description: 16-pin 150-mil wide qsop package code: q document control no. pd - 1201 revision: g date: 11/07/07 note: 1) controlling dimensions in inches. 2) ref: jedec mo-137b/ab. 3) dimensions do not include mold flash, protrusions or gate burrs pericom semiconductor corporation 3545 n. 1st street, san jose, ca 95134 1-800-435-2335 ? www.pericom.com 09-0037
pi3b3251 3.3v, 8:1 mux/demux nanoswitch ? 5 ps8150g 03/02/09 packaging mechanical: 16-pin tssop (l) pericom semiconductor corporation ? 1-800-435-2336 ? www.pericom.com ordering information ordering code package code package description PI3B3251QE q pb-free & green, 16-pin qsop pi3b3251le l pb-free & green, 16-pin tssop notes: ? thermal characteristics can be found on the company web site at www.pericom.com/packaging/ ? "e" denotes pb-free and green ? adding an "x" at the end of the ordering code denotes tape and reel packaging 1 description: 16-pin, 173-mil wide, tssop package code: l document control no. pd - 1310 revision: e date: 03/09/05 note: 1. package outline exclusive of mold flash and metal burr 2. controlling dimentions in millimeters 3. ref: jedec mo-153f/ab pericom semiconductor corporation 3545 n. 1st street, san jose, ca 95134 1-800-435-2335 ? www.pericom.com .193 .201 .047 max. .002 .006 seating plane .0256 bsc .018 .030 .004 .008 .252 bsc 1 16 .169 .177 0.05 0.15 6.4 0.45 0.75 0.09 0.20 4.3 4.5 1.20 4.9 5.1 0.65 0.19 0.30 .007 .012 09-0037
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