1 01/10/11 features ? near-zero propagation delay ? 5? switches connect inputs to outputs ? fast switching speed: 5.2ns max. ? ultra low quiescent power (0.2a typical) C ideally suited for notebook applications ? pin compatible with 74 series 253 logic devices ? packaging (pb-free & green available): C 16-pin 150-mil wide plastic qsop (q) C 16-pin 173-mil wide plastic tssop (l) block diagram truth table (1) enable select y a y b function e a e b s 1 s 0 h x x x hi-z x disable a x h x x x hi-z disable b l l l l i a 0 i b 0 s1-0 = 0 l l l h i a 1 i b 1 s1-0 = 1 l l h l i a 2 i b 2 s1-0 = 2 l l h h i a 3 i b 3 s1-0 = 3 description pericom semiconductor s pi3b3253 is a 3.3v , dual4:1 multi- plexer/ demultiplexer with hi-z outputs that is pinout compatible with the pi74fct253t , 74f253, and 74als/as/ls 253. inputs can be connected to outputs with low on-resistance (5?) with no additional ground bounce noise or propagation delay. pin confguration pin description pin name description i a n , i b n data inputs s 0-1 select inputs e a , e b enable y a , y b data outputs gnd ground v cc power note: 1. h = high v oltage level, l = low v oltage level i y e sw ia0 ea eb s0 s1 ia1 ia2 ia3 ib0 ib1 ib2 ib3 ya yb 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 s0 ib3 ib2 ib1 ib0 yb ya ea gnd s1 ia3 ia2 ia1 ia0 eb pi3b3253 3.3v, dual 4:1 mux/demux nanoswitch ? 11-0009
2 01/10/11 pi3b3253 3.3v, dual 4:1 mux/demux nanoswitch ? capacitance (t a = 25c, f = 1 mhz) parameters (1) description test conditions typ. units c in input capacitance v in = 0v 3.0 pf c off i a /i b capacitance, switch off 8.0 c on i a /i b capacitance, switch on 36.0 dc electrical characteristics (over the operating range, t a = C40c to +85c, v cc =3.3v 10%) parameters description t est conditions (1) min. typ. (2) max. units v ih input high v oltage guaranteed logic high level 2.0 v v il input low v oltage guaranteed logic low level C0.5 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 n v cc 1 v ik clamp diode v oltage v cc = min., i in = C18ma C1.2 v r on switch on-resistance (3) v cc = min., v in = 0.0v, i on = 48ma or 64ma 5 8 ? v cc = min., v in = 2.4v, i on = 15ma 10 17 notes: 1. this parameter is determined by device characterization but is not production tested. storage t emperature ..................................................................... C65c to +150c ambient t emperature with power applied .................................... C40c to +85c supply v oltage to ground potential ................................................ C0.5v to +4.6v dc input v oltage ............................................................................. C0.5v to +4.6v dc output current ........................................................................................ 120ma power dissipation ............................................................................................ 0.5w note: stresses greater than those listed under maximum ra tings may cause permanent damage to the de - vice. this is a stress rating only and functional op - eration of the device at these or any other conditions above those indicated in the operatio nal sections of t his s pecifcation i s n ot i mplied. e xposure t o a bsolute m aximum r ating c onditions f or e xtended p eriods m ay af fect reliability. maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) notes: 1. for max. or min. conditions, use appropriate value specifed 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. 11-0009
3 01/10/11 pi3b3253 3.3v, dual 4:1 mux/demux nanoswitch ? power supply characteristics parameters description 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 3.0 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 specifed under electrical characteristics for the applicable device. 2. typical values are at v cc = 3.3v, +25c ambient. 3. per ttl driven input (control inputs only); i and y pins do not contribute to i cc . switching characteristics over operating range parameters description test conditions com. units min. max. t iy propagation delay (1,2) in to yn c l = 50pf r l = 500 0.25 ns t sy bus select t ime, sn to yn 1 4.0 t pzh bus enable t ime, e to yn 1 3.8 t phz t plz bus disable t ime, en to y 1 5.2 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. applications information logic inputs the logic control inputs 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-to-rail ? minimizes power consumption. power-supply sequencing and hot plug information 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. 11-0009
4 01/10/11 pi3b3253 3.3v, dual 4:1 mux/demux nanoswitch ? .189 .197 .053 .069 .004 .010 seating plane .025 bsc .007 .010 .228 .244 1 16 .150 .157 .016 .050 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 0.41 1.27 .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 packaging mechanical: 16-pin qsop (q) 11-0009
5 01/10/11 pi3b3253 3.3v, dual 4:1 mux/demux nanoswitch ? pericom semiconductor corporation ? 1-800-435-2336 ? www .pericom.com ordering information ordering code package code package desciption pi3b3253qe q pb-free & green, 16-pin qsop PI3B3253LE l pb-free & green, 16-pin tssop notes: ? thermal characteristics can be found on the company web site at www.pericom.com/packaging/ ? e = pb-free & green ? adding an x suffx = t ape/reel packaging mechanical: 16-pin tssop (l) .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 11-0009
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