1 pin description pin name description ian-idn data inputs s select inputs e enable ya-yd data outputs gnd ground v cc power description pericom semiconductors pi5c3257 is a quad 2:1 multiplexer/ demultiplexer with three-state outputs that is pinout and function compatible with the pi74fct257t, 74f257, and 74als/as/ls257. inputs can be connected to outputs with low on-resistance (5?) with no additional ground bounce noise or propagation delay. block diagram features: ? near -zero propagation delay ? 5? switches connect inputs to outputs ? direct bus connection when switches are on ? ultra low quiescent power (0.2a typical) C ideally suited for notebook applications ? pin compatible with 74 series 257 logic devices ? packaging (pb-free & green available): C 16-pin 150-mil wide plastic qsop (q) C 16-pin 150-mil wide plastic soic (w) C 16-pin 173-mil wide plastictssop (l) pin confguration truth table (1) e s ya yb yc yd function h x hi-z hi-z hi-z hi-z disable l l ia0 ib0 ic0 id0 s = 0 l h ia1 ib1 ic1 id1 s = 1 note: 1. h = high voltage level, l = low voltage level e ia0 ia1 ib0 ib1 ic0 ic1 id0 id1 s ya yb yc yd 1 2 3 4 5 16 6 15 7 14 8 13 12 11 10 9 s ia0 ia1 ya ib0 ib1 yb gnd v cc e id0 id1 yd ic0 ic1 yc pi5c3257 quad 2:1 mux/demux bus switch 01/14/13 13-0015
2 storage temperature ........................................................... C65c to +150c ambient temperature with power applied .......................... C40c to +85c supply voltage to ground potential (inputs & v cc only) .... C0.5v to +7.0v supply voltage to ground potential (outputs & d/o only) . C0.5v to +7.0v dc input voltage ................................................................... C0.5v to +7.0v dc output current .............................................................................. 120ma power dissipation .................................................................................. 0.5w note: stresses greater than those listed under maximum rat - ings 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 specifcation is not implied. ex - posure to absolute maximum rating conditions for extended periods may affect reliability. capacitance (t a = 25c, f = 1 mhz) parameters (1) description test conditions typ max. units c in input capacitance v in = 0v 6 pf c off in/yn capacitance, switch off 6 c on in/yn capacitance, switch on 14 maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) dc electrical characteristics (over the operating range, t a = C40c to +85c, v cc = 5v 5% ) parameters description 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 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, y v cc 1 v ik clamp diode voltage v cc = min., i in = C18 ma C0.7 C1.2 v i os short circuit current (3) i (y) = 0v, y (i) = v cc 100 ma v h input hysteresis at control pins 150 mv 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 10 15 notes: 1. for max. or min. conditions, use appropriate value specifed under electrical characteristics for the applicable device type. 2. t ypical values are at v cc = 5.0v, 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 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. notes: 1. this parameter is determined by device characterization but is not production tested. 01/14/13 pi5c3257 quad 2:1 mux/demux bus switch 13-0015
3 switching characteristics over operating range parameters description 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 time sn to yn 0.5 5.2 t pzh t pzl bus enable time e to yn 0.5 4.8 t phz t plz bus disable time e to yn 0.5 5.0 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 = 3.4v (3) 2.5 ma i cc d supply current per input per mhz (4) v cc = max., i and y pins open be = gnd control input toggling 50% duty cycle 0.25 ma/ mhz notes: 1. for max. or min. conditions, use appropriate value specifed under electrical characteristics for the applicable device. 2. t ypical values are at v cc = 5.0v, +25c ambient. 3. per ttl driven input ( v in = 3.4v, control inputs only); i and y pins do not contribute to i cc . 4. this current applies to the control inputs only and represent the current required to switch internal capacitance at the specifed frequency . the i and y inputs generate no signifcant ac or dc currents as they transition. this parameter is not tested, but is guaranteed by design. 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. 01/14/13 pi5c3257 quad 2:1 mux/demux bus switch 13-0015
4 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 01/14/13 pi5c3257 quad 2:1 mux/demux bus switch 13-0015
5 description: 16-pin, 150mil wide soic package code: w document control #: revision: f date: 06 /15/12 date: 06 /15/12 pd-1004 2012-0398 packaging mechanical: 16-pin soic (w) 01/14/13 pi5c3257 quad 2:1 mux/demux bus switch 13-0015
6 date: 05/03/12 description: 16-pin, 173mil wide tssop package code: l document control #: pd-1310 revision: f notes: 1. refer jedec mo-153f/ab 2. controlling dimensions in millimeters 3. package outline exclusive of mold flash and metal burr 12-0372 ordering information ordering code packaging code package description pi5c3257qex q pb-free & green, 16-pin 150-mil wide plastic qsop pi5c3257wex w pb-free & green, 16-pin 150-mil wide plastic soic PI5C3257LEX l pb-free & green, 16-pin 173-mil wide plastic 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 = tape/reel pericom semiconductor corporation ? 1-800-435-2336 ? www .pericom.com note: ? for latest package info, please check: http://www .pericom.com/products/packaging/mechanicals.php packaging mechanical: 16-pin tssop (l) 01/14/13 pi5c3257 quad 2:1 mux/demux bus switch 13-0015
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