1 ps8726a 07/08/04 features ? near-zero propagation delay ? 5? switches connect inputs to outputs ? high signal passing bandwidth (300mhz) ? beyond rail-to-rail switching ? 5v i/o tolerant with 3.3v supply ? 2.5v and 3.3v supply voltage operation ? hot insertion capable ? industrial operating temperature: -40oc to +85oc ? 2kv esd protection (human body model) ? latch-up performance >250ma per jesd17 ? packaging (pb-free & greeen available): C 16-pin 150-mil wide plastic qsop (q) C 16-pin 173-mil wide plastic tssop (l) C 20-contact tqfn (zh) low voltage, high bandwidth, 2-channel, 4:1 mux/demux, nanoswitch ? with single enable description pericom semiconductors pi3ch series of switch circuits are produced using the companys advanced sub-micron cmos technology, achieving industry leading performance. the PI3CH281 is a 2-channel, 4:1 multiplexer/demultiplexer with 3-state outputs. the switch introduces no additional ground bounce noise or propagation delay. the PI3CH281 device is very useful in switching signals that have high bandwidth (300mhz). PI3CH281 block diagram ia0 en s0 s1 ia1 ia2 ia3 ib0 ib1 ib2 ib3 ya yb pin confguration 1 2 3 4 5 16 6 15 7 14 8 13 12 11 10 9 en s1 ia3 ia2 ia1 ia0 ya gnd vcc n.c. s0 ib3 ib2 ib1 ib0 yb 16-pin l, q 20-contact zh n.c. n.c. s0 ib3 ib2 ib1 ib0 yb en s1 ia3 ia2 ia1 ia0 ya n.c. gn d n.c. n.c. v cc 19 ? 18 17 16 15 14 13 12 1 2 0 10 11 2 3 4 5 6 7 8 9 notes: 1. n.c = no internal connection
2 ps8726a 07/08/04 PI3CH281 low voltage, high bandwidth, 2-channel, 4:1 mux/demux, nanoswitch ? with single enable storage temperature ................................................ C65c to +150c ambient temperature with power applied ............... C40c to +85c supply voltage to ground potential ........................... C0.5v to +4.6v dc input voltage ........................................................ C0.5v to +6.0v 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 specifcation is not implied. exposure to absolute maximum rating conditions for extended periods may affect re - liability. maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) dc electrical characteristics, 3.3v supply (over the 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 v il input low voltage guaranteed logic low level C0.5 0.8 v ik clamp diode voltage v cc = min., i in = C18 ma -1.3 C1.8 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 y, i n v cc 1 r on switch on-resistance (4) v cc = min., v in = 0.0v, i on = 48 ma or -64ma 4 6 ? v cc = min., v in = 3.6v, i on = -15 ma 5 8 pin description pin name description ia n , ib n data inputs s0-1 select inputs en enable ya to yb data outputs gnd ground v cc power truth table (1) enable select en s1 s0 y function h x x hi-z disable l l l i0 s1-0 = 0 l l h i1 s1-0 = 1 l h l i2 s1-0 = 2 l h h i3 s1-0 = 3 notes: 1. h=high voltage level; l=low voltage level
3 ps8726a 07/08/04 PI3CH281 low voltage, high bandwidth, 2-channel, 4:1 mux/demux, nanoswitch ? with single enable 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. 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. 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 y and in pin at indicated current through the switch. on-resistance is determined by the lower of the voltages on the two (y, in) pins. 5. this parameter is determined by device characterization but is not production tested. capacitance (t a = 25c f = 1 mhz) parameters (5) description test conditions typ. units c in input capacitance v in = 0v 3.0 pf c off(in) in capacitance, switch off 3.5 c off(y) y capacitance, switch off 12 c on y/in capacitance, switch on 15.0 power supply characteristics parameters description test conditions (1) min. typ. (2) max. units i cc quiescent power supply current v cc = 3.6v, v in = gnd or v cc 0.8 ma dc electrical characteristics, 2.5v supply (over operating range, t a = C40c to +85c, v cc = 2.5v 10%) parameters (5) description test conditions min. typ. max. units v ih input high voltage guaranteed logic high level 1.8 C v cc + 0.3 v v il inout low voltage guaranteed logic low level C0.3 C 0.8 v ik clamp diode voltage v cc = max., i in = C6ma C C0.7 C1.8 i ih input high current v cc = max., v in = v cc C C 1 a iil input low current v cc = max., v in = gnd C C 1 i ozh high impedance current (3) 0 y, in v cc C C 1 r on switch on-resistance (4) v cc = min., v in =0.0v, i on = C48ma C 6 8 ? v cc = min., v in = 2.25v, i on = -15ma C 7 14
4 ps8726a 07/08/04 PI3CH281 low voltage, high bandwidth, 2-channel, 4:1 mux/demux, nanoswitch ? with single enable notes: 1. see test circuit and waveforms. 2. this parameter is guaranteed but not tested on propagation delays. 3. the 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 0.30ns for 10pf 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 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. switching characteristics over 3.3v operating range parameters description conditions (1) com. units min. typ. max. t plh t phl propogation delay (2,3) y to in, in to y see test diagram 0.3 ns t pzh t pzl enable time s or en to y or in see test diagram 1.5 9.0 t phz t plz disable time s or en to y or in 1.5 9.0 switching characteristics over 2.5v operating range parameters description conditions (1) com. units min. max. t plh t phl propogation delay (2,3) y to in, in to y see test diagram 0.3 ns t pzh t pzl enable time s or en to y or in see test diagram 1.5 15.0 t phz t plz disable time s or en to y or in 1.5 12.0 dynamic electrical characteristics over the operating range (t a = -40o to +85o, v cc = 3.3v 10%) parameter description test condition min. typ. max. units x talk crosstalk see test diagram -60 db o irr off-isolation see test diagram -60 bw -3db bandwidth see test diagram 200 300 mhz
5 ps8726a 07/08/04 PI3CH281 low voltage, high bandwidth, 2-channel, 4:1 mux/demux, nanoswitch ? with single enable test circuit for electrical characteristics (1) notes: 1. c l = load capacitance: includes jig and probe capacitance. 2. r t = termination resistance: should be equal to z out of the pulse generator 3. waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. 4. all input impulses are supplied by generators having the following characteristics: prr mhz, z o = 50, t r 2.5ns, t f 2.5ns. 5. the outputs are measured one at a time with one transition per measurement. test circuit for dynamic electrical characteristics r t 10pf c l v cc v in v out 200 ? 200 ? 6.0v pulse generator d.u.t v cc d.u. t t1 r1 s1 hp11667a 50 ? 10 pf hp4195a switch positions test switch t plz , t pzl 6.0v t phz , t pzh gnd prop delay open
6 ps8726a 07/08/04 PI3CH281 low voltage, high bandwidth, 2-channel, 4:1 mux/demux, nanoswitch ? with single enable switching waveforms pulse skew - t sk(p) voltage waveforms enable and disable times input t plh 2.5v 2.5v 2.5v 2.5v t phl 3.5v 1.5v output v oh v ol t plz 1.25v 1.25v 2.5v v oh 0v v dd/2 v dd/2 t phz t pzl t pzh output output v ol +0.3v v ol v oh v oh -0.3v s or en v ol input output t plh t sk(p) = i t phl C t plh i t phl 3.5v 2.5v 2.5v v ol v oh 1.5v
7 ps8726a 07/08/04 PI3CH281 low voltage, high bandwidth, 2-channel, 4:1 mux/demux, nanoswitch ? with single enable applications information logic inputs the logic control inputs can be driven upto 3.6vregardless of the supply voltage. for example, given a +3.3v supply, en maybe driven low to 0v and high to 3.6v. driving en rail-to-rail ? minimizes power consumption. power supply-sequencing proper power supply sequencing is recommended for all cmos devices. always apply v cc before applying signals to the input/ output or control pins. hot insertion for datacom and telecom applications that have ten or more volts passing through the backplane, a high voltage from the power supply may be seen at the device input pins during hot insertion. the pi3chxx devices have maximum limits of 6v and 120ma for 20ns. if the power is higher or applied for a longer time or repeatedly reaches the maximum limits, the devices can be damaged. packaging mechanical: 16-pin qsop (q) .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
8 ps8726a 07/08/04 PI3CH281 low voltage, high bandwidth, 2-channel, 4:1 mux/demux, nanoswitch ? with single enable 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 x.xx x.xx denotes controlling dimensions in millimeters 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 packaging mechanical: 20-contact tqfn (zh) 1.50 ref . 0.400.10 0.50 typ . (14x) 0.250.05 c 0.35 2.050.10 3.050.10 3.500.10 4.500.10 (s) 3.50 ref . 0.20 ref . 0.0-0.05 pin 1 pin 20 0.750.05
9 ps8726a 07/08/04 PI3CH281 low voltage, high bandwidth, 2-channel, 4:1 mux/demux, nanoswitch ? with single enable ordering information ordering code packaging code package description PI3CH281q q 150-mil, 16-pin qsop PI3CH281qe q pb-free & green, 150-mil, 16-pin qsop PI3CH281l l 173-mil, 16-pin tssop PI3CH281le l pb-free & green, 173-mil, 16-pin tssop PI3CH281z_e z pb-free & green, 16-contact tqfn notes: 1. thermal characteristics can be found on the company web site at www .pericom.com/packaging/ 2. number of transistors = tbd pericom semiconductor corporation ? 1-800-435-2336 ? www.pericom.com
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