1 www.pericom.com 08/10/12 PI3VT32X245-A block diagram be1 a7 a0 b7 b0 be2 a15 a8 b15 b8 pin configuration v cc nc 1 40 be1 a0 2 39 b0 a1 3 38 b1 a2 4 37 b2 a3 5 36 b3 a4 6 35 b4 a5 7 34 b5 a6 8 33 b6 a7 9 32 b7 gnd 10 31 v cc a8 11 30 be2 a9 12 29 b8 13 28 b9 a10 nc 14 27 b10 a11 15 26 b11 a12 16 25 b12 a13 17 24 b13 a14 18 23 b14 a15 19 22 b15 gnd 20 21 description pericom semiconductors pi3vt series of logic circuits are pro - duced using the companys advanced submicron cmos technol - ogy, achieving industry leading performance. te PI3VT32X245-A, a 2.5v or 3.3v 16-bit 2-port bus switch, is designed with a low on resistance (5 ohms). te switches are turned on or enabled by the bus enable ( be n) input signals. given a 3.3v supply and an input voltage of 3.3v, the switch translates to an output voltage of 2.5v. similarly, when operated with a 2.5v supply and given 2.5v inputs, the device translates the outputs to 1.8v. features ?? near-zero propagation delay ?? low on-resistance switches connect inputs to outputs ?? 2.5v to 3.3v supply voltage operation ?? 2.5v or 1.8v switching ?? packaging (pb-free & green available): 4 0-pin 150 mil wide bqsop (b) 16-bit,f2-port,flowfvoltage f translatorfbusfswitch features ?? 3.3v to 2.5v level shifing (voltage translation) ?? 2.5v to 1.8v level shifing (voltage translation) all trademarks are property of their respective owners. 12-0246
2 www.pericom.com 08/10/12 absolute maximum ratings parameter min. ffmax. units storage temperature -65 150 o c ambient temperature with power applied -40 85 o c supply voltage to ground potential -0.5 4.6 v dc input voltage -0.5 5.5 v dc output current - 120 ma power dissipation - 0.5 w stress beyond those listed under absolute maximum ratings may cause permanent damage to the device. dc electrical characteristics (over the operating range, t a = C40c to +85c, v cc = 3.3v 10%) parameters description testfconditions (1) min ty pf (2) max units v ih input high voltage guaranteed logic high level 1.8 v cc +0.3v v v il input low voltage guaranteed logic low level -0.5 0.8 v ih input high voltage v cc = 2.5v 1.6 v cc +0.3v v v il input low voltage v cc = 2.5v -0.5 0.6 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 a, b v cc 1 r on switch on resistance v cc = min., v in = 0.0v, i on = -8ma 5 9 v cc = min., v in = 1.7v, i on = -8ma 18 30 v cc = 2.3v, v in = 0.0v, i on = C8ma 6 10 v cc = 2.3v, v in = 1.3v, i on = C8ma 35 50 v p pass voltage v in = v cc = 3.3v, i out = C5a 2.1 2.3 2.7 v v in = v cc = 2.5v, i out = C5a 1.6 pin description pinfname i/o description be n i bus enable input (active low) a0 C a15 i/o bus a b0 C b15 i/o bus b truth table (1) function be n a0f-f15 disconnect h hi-z connect l b0 C 15 notes: 1. h = high voltage level, l = low voltage level, hi-z = high impedance all trademarks are property of their respective owners. PI3VT32X245-A 16-bit, 2-port, low voltage translator bus switch 12-0246
3 www.pericom.com 08/10/12 power supply characteristics parameters description testfconditions (1) min ty pf (2) max units i cc quiescent power supply current v cc = max. v in = gnd or v cc 6 a i cc supply current per input high v in = 3v (3) 100 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 . switching characteristics over 3.3v0.3v operating range parameters description testfconditions (1) com. units min max t plh t phl propagation delay (2,3) ax to bx c l = 50 pf r l = 500 0.25 ns t pzh t pzl bus enable time be to ax or bx c l = 50 pf r l = 500 r = 500 1.5 6.5 t phz t plz bus disable time be to ax or bx 1.5 5.5 capacitance (t a = 25c, f = 1 mhz) parameters (3) description testfconditions ty p units c in input capacitance v in = 0v 3.5 pf c off a/b capacitance, switch of 5.0 c on a/b capacitance, switch on 10.0 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. tis parameter is determined by device characterization but is not production tested. all trademarks are property of their respective owners. PI3VT32X245-A 16-bit, 2-port, low voltage translator bus switch 12-0246
4 www.pericom.com 08/10/12 switching characteristics over 2.5v0.2v operating range parameters description testfconditions (1) com. units min max t plh t phl propagation delay (2,3) ax to bx c l = 50 pf r l = 500 0.25 ns t pzh t pzl bus enable time be to ax or bx c l = 50 pf r l = 500 r = 500 1.5 9.8 t phz t plz bus disable time be to ax or bx 1.5 8.3 notes: 1. see test circuit and waveforms. 2. tis parameter is guaranteed but not tested on propagation delays. 3. te bus switch contributes no propagational delay other than the rc delay of the on-resistance of the switch and the load ca- pacitance. te time constant for the switch alone is of the order of 0.25 ns for 50 pf 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. all trademarks are property of their respective owners. PI3VT32X245-A 16-bit, 2-port, low voltage translator bus switch 12-0246
5 www.pericom.com 08/10/12 pericom semiconductor corporation ? 1-800-435-2336 packaging mechanical: 40-pin bqsop (b) 1 x.xx x.xx denotes dimension in millimeters description: 40-pin, 150-mil wide bqsop package code: b document control no. pd - 1209 revision: f date: 03/09/05 pericom semiconductor corporation 3545 n. 1st street, san jose, ca 95134 1-800-435-2335 ? www.pericom.com notes: 1. controlling dimensions in millimeters 2. ref.: jedec mo - 154c/bb 3. package outline exclusive of mold flash and metal burr ordering information ordering code package code pack age ty pe PI3VT32X245-Abe b pb-free & green, 40-pin bqsop er rerii n be fn n e pn eb ie peripin 2 e pb-free & green 3 ain n x tpeee all trademarks are property of their respective owners. PI3VT32X245-A 16-bit, 2-port, low voltage translator bus switch 12-0246
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