1 ps8344a 07/22/10 pi3c3125 2.5v/3.3v, high bandwidth, hot insertion,4-bit, 2-port bus switch with individual enables features ? near-zero propagation delay ? 5-ohm switches connect inputs to outputs ? high bandwidth (>400 mhz) ? 2.5v/3.3v supply v oltage operation ? rail-to-rail, or 2.5v or 3.3v switching ? 5v i/o t olerant ? permits hot insertion ? packaging (pb-free & green available): C 14-pin 150-mil wide plastic soic (w) C 14-pin 170-mil wide plastic tssop (l) C 16-contact tdfn (zj) applications ? high bandwidth data switching ? hot docking description pericom semiconductor s pi3c3125 is a 2.5 volt or 3.3 volt, 4-bit bus switch designed with four individual 5-ohm bus switches with fast individual enables in an industry standard 74xx125/126 pinout. when enabled via the associated bus enable pin, the a pin is directly connected to the b pin for that particular gate. the bus switch introduces no additional propagation delay or additional ground bounce noise. the pi3c3125 device has active low enables. it is very useful in switching signals that have high bandwidth (>400 mhz). block diagram a 0 a 1 a 2 be 0 be 1 a 3 be 2 be 3 b 0 b 1 b 2 b 3 11-0003
2 pi3c3125 2.5v/3.3v, high bandwidth, hot insertion,4-bit, 2-port bus switch with individual enables ps8344a 07/22/10 note: stresses greater than those listed under maximum ra tings 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 reliability. maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) storage t emperature ............................................................ C65c to +150c ambient t emperature with power applied ........................... C40c to +85c supply v oltage to ground potential (inputs & v cc only) ..... C0.5v to +4.6v supply v oltage to ground potential (outputs & d/o only) .. C0.5v to +4.6v dc input v oltage .................................................................... C0.5v to +5.5v dc output current ............................................................................... 120ma power dissipation ................................................................................... 0.5w 14-pin confgurations 16-pin confgurations pin description pin name description ben switch enable a3 - a0 bus a b3 - b0 bus b v cc power gnd ground truth table (1) ben an bn v cc function x* hi-z hi-z gnd disconnect h hi-z hi-z v cc disconnect l bn an v cc disconnect note: 1. h = high v oltage level, l = low v oltage level hi-z = high impedance, x = dont care * a pull-up resistor should be provided for power-up protection. 1 2 3 4 5 6 7 14 13 12 11 10 9 8 vcc be3 a3 b3 be2 a2 b2 be0 a0 b0 be1 a1 b1 gnd 14-pin 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 vcc be3 a3 b3 be2 a2 b2 nc nc be0 a0 b0 be1 a1 b1 gnd 16-pin 11-0003
3 pi3c3125 2.5v/3.3v, high bandwidth, hot insertion,4-bit, 2-port bus switch with individual enables ps8344a 07/22/10 dc electrical characteristics (over 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 v oltage guearanteed 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 (3) high impedance output current 0 a, b v cc 1 v ik clamp diode v oltage v cc = min., i in = C18ma C0.73 C1.2 v r on switch on resistance (4) v cc = min., v in = 0.0v, i on = 48ma or 60ma v cc = min., v in = 2.4v, i on = 15ma 5 8 7 15 -ohm 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 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. capacitance (t a = 25c, f = 1 mhz) parameters (1) description test conditions typ. units c in input capacitance v in = 0v 3.5 pf c off a/b capacitance, switch off v in = 0v 5.0 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. power supply characteristics parameters description test conditions min. typ. (2) max. units i cc quiescent power supply current v cc = max v in = gnd or v cc 260 500 a ?i cc supply current per input 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 driven input (control input only); a and b pins do not contribute to i cc . 11-0003
4 pi3c3125 2.5v/3.3v, high bandwidth, hot insertion,4-bit, 2-port bus switch with individual enables ps8344a 07/22/10 switching characteristics over 3.3v operating range parameters description conditions com. units min. max. t plh t phl propogation delay (1,2) a to b, b to a c l =50pf r l = 500-ohm 0.25 ns t pzh t pzl bus enable t ime c l =50pf r l = 500-ohm r = 500-ohm 1.5 6.5 t phz t plz bus disable t ime 1.5 5.5 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. switching characteristics over 2.5v operating range parameters description conditions com. units min. max. t plh t phl propogation delay (1,2) a to b, b to a c l =50pf r l = 500-ohm 0.25 ns t pzh t pzl bus enable t ime c l =50pf r l = 500-ohm r = 500-ohm 1.5 9.8 t phz t plz bus disable t ime 1.5 8.3 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. 11-0003
5 pi3c3125 2.5v/3.3v, high bandwidth, hot insertion,4-bit, 2-port bus switch with individual enables ps8344a 07/22/10 1 seating plane .050 bsc 1 14 x 45? 0-8? .149 .157 x.xx x.xx denotes dimensions in millimeters 3.78 3.99 .336 .344 8.55 8.75 .0155 .026 0.393 0.660 1.27 .053 .068 1.35 1.75 .2284 .2440 5.80 6.20 .013 .020 0.330 0.508 .0040 .0098 0.10 0.25 .0099 .0196 0.25 0.50 .0075 .0098 0.19 0.25 .016 .050 0.41 1.27 ref description: 14-pin, 150-mil wide, soic package code: w document control no. pd - 1002 revision: e date: 03/09/05 notes: 1) controlling dimensions in millimeters. 2) ref: jedec ms-012d/ab pericom semiconductor corporation 3545 n. 1st street, san jose, ca 95134 1-800-435-2335 ? www.pericom.com 4.0 2.0 0.0 0.0 1.0 2.0 3.0 4.0 5.0 v tuo ) v dd v 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 v in (v) switch 11-0003
6 pi3c3125 2.5v/3.3v, high bandwidth, hot insertion,4-bit, 2-port bus switch with individual enables ps8344a 07/22/10 1 description: 14-pin, 44mm wide, tssop package code: l document control no. pd - 1309 revision: c 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-1 pericom semiconductor corporation 3545 n. 1st street, san jose, ca 95134 1-800-435-2335 ? www.pericom.com 0.193 0.201 0.047 0.002 0.006 seating plane 0.0256 typical 0.018 0.030 0.004 0.008 0.240 0.264 1 14 0.169 0.177 0.05 0.15 6.1 6.7 0.45 0.75 0.09 0.20 4.3 4.5 1.20 max. 4.90 5.10 0.65 0.19 0.30 0.007 0.012 1 description: 16-contact, thin dual-in-line flat no-lead (tdfn) package code: zj (zj16) document control #: pd-2042 revision: c date: 07/28/08 08-0339 note: ? for latest package info, please check: http://www.pericom.com/products/packaging/mechanicals.php 11-0003
7 pi3c3125 2.5v/3.3v, high bandwidth, hot insertion,4-bit, 2-port bus switch with individual enables ps8344a 07/22/10 pericom semiconductor corporation ? 1-800-435-2336 ? www .pericom.com ordering information ordering code packaging code package type top mark pi3c3125le l pb-free & green, 14-pin tssop pi3c3125we w pb-free & green, 14-pin soic pi3c3125zje zj pb-free & green, 16-pin tdfn t a 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 11-0003
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