1 ps8177a 12/14/98 features ? near-zero propagation delay ?5 w switches connect inputs to outputs ? fast switching speed - 5ns (max.)(16292) ? internal 500 w pull-down on a 2 ports ? ultra-low quiescent power (0.2a typical) C ideally suited for notebook applications ? vcc operating range : 3.0v to 3.6v ? industrial operating temperature: C40c to +85c ? make-before-break switching ? packages available: C 56-pin 240-mil wide thin plastic tssop (a) C 56-pin 300-mil wide plastic ssop (v) 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3b16292 PI3B162292 (25 w w w w w ) description pericom semiconductors pi3b series of logic circuits are produced using the companys advanced 0.35 micron cmos technology. the pi3b16292 and PI3B162292 are 3.3 volt, 12-bit to 24-bit mux/demux bus switches designed with a low on resistance allowing inputs to be connected directly to outputs. the PI3B162292 device has a built-in 25-ohm series resistor to reduce noise resulting from reflections, thus eliminating the need for an external terminating resistor. a2 port is not externally connected and, as a result, has an internal 500-ohm pulldown resistor to ground. pin configuration function s0 a1 a2 a1 to b1, a2 to b2 l b1 b2 a1 to b2, a2 to b1 h b2 b1 logic block diagram product pin description pin name i/o description s 0 i select inputs xa1 i/o bus a xb x i/o bus b nc leave it unconnected nc1 leave it unconnected note: 1. h = high voltage level l = low voltage level z = high impedance truth table w 56-pin a, v applications ? memory switching 1 2 3 4 5 6 7 gnd 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 25 26 27 28 32 31 30 29 1 a 1 nc1 s 0 2 a 1 nc1 3 a 1 nc1 4 a 1 nc1 5 a 1 nc1 6 a 1 nc1 v cc 7 a 1 nc1 8 a 1 gnd nc1 9 a 1 nc1 10 a 1 nc1 11 a 1 nc1 12 a 1 nc1 gnd 1 b 1 1 b 2 nc 2 b 1 2 b 2 3 b 1 3 b 2 4 b 1 4 b 2 5 b 1 5 b 2 6 b 1 6 b 2 7 b 1 7 b 2 8 b 1 gnd 8 b 2 9 b 1 9 b 2 10 b 1 10 b 2 11 b 1 11 b 2 12 b 1 12 b 2 nc 3.3volt, 24-bit mux/demux busswitch
2 ps8177a 12/14/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012 12345678901 2 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3b16292/162292 3.3v, 24-bit mux/demux busswitch (25 w w w w w ) dc electrical characteristics (over the operating range, t a = C40c to +85c, v cc = 3.0v to 3.6v) 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 i i input current v cc = max., v in = v cc or gnd 1 a v cc = 0, v in = v cc 10a v ik clamp diode voltage v cc = min., i in = C18ma C0.7 C1.2 v r on switch on resistance (3) v cc = min., v in = 0.0v, 16292 5 8 w i on = 64ma 162292 20 28 40 v cc = min., v in = 2.4v, 16292 10 15 w i on = 15ma 162292 20 35 48 storage temperature ............................................ C65c to +150c ambient temperature with power applied ............. C0c to +85c supply voltage range ............................................. C0.5v to +4.6v dc input voltage .................................................... C0.5v to +4.6v dc output current .............................................................. 120 ma power dissipation ................................................................ 0.5watt 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 con ditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum ra ting conditions for extended periods may affect reliability. capacitance (t a = 25c, f = 1 mhz) parameters (4) description test conditions max. units c in input capacitance v in = 0v 3.0 pf c on a/b capacitance, switch on v in = 0v 30.0 pf notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device. 2. typical values are at vcc = 3.3v, t a = 25c ambient and maximum loading. 3. 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. 4. this parameter is determined by device characterization but is not production tested. maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.)
3 ps8177a 12/14/98 pi3b16292/162292 3.3v, 24-bit mux/demux busswitch (25 w w w w w ) 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 power supply characteristics parameters description test conditions (1) min. typ (2) max. units i cc quiescent power v cc = m ax .v in = gnd or v cc 10a supply current d i cc (3) supply current for v cc = m ax .v in = 3.0 v (4) 750 a s0 @ ttl high other inputs at v cc or gnd i ccd supply current for v cc = max., 0.25 ma/ s0 per mhz (5) a and b pins open mhz toggling 50% duty cycle notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for applicable device. 2. typical values are at vcc = 3.3v, +25c ambient. 3. this is the increase in supply current for s0 at the specified ttl voltage level rather than v cc or gnd. 4. per driven input ( s0 only); a and b pins do not contribute to icc. 5. this current applies to the control inputs only and represent the current required to switch internal capacitance at the spec ified frequency. the a and b inputs generate no significant ac or dc currents as they transition. this parameter is not tested, but i s guaranteed by design. pi3b16292 switching characteristics over operating range com. parameters description conditions (1) min. max. units t plh propagation delay (2,3) 0.25 t phl xa1 to xbx, xbx to xa1 t pzh bus enable time 1 4.5 ns t pzl s to xa1 or xbx t phz bus disable time 1 5.0 t plz s to xa1 or xbx t m make-before-break time (2) 02 PI3B162292 switching characteristics over operating range notes: 1. see test circuit and waveforms. 2. this parameter is guaranteed but not tested. 3. the bus switch contributes no propagational delay other than the rc delay of the on resistance of the switch and 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 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. 4. applies to t plz and t pzl . c l = 50 pf r l = 500 w r = 500 w to 6v (4) com. parameters description conditions (1) min. max. units t plh propagation delay (2,3) 1.25 t phl xa1 to xbx, xbx to xa1 t pzh bus enable time 1 5 ns t pzl s to xa1 or xbx t phz bus disable time 1 5.5 t plz s to xa1 or xbx t m make-before-break time (2) 0 2 c l = 50 pf r l = 500 w r = 500 w to 4.6v (4)
4 ps8177a 12/14/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012 12345678901 2 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3b16292/162292 3.3v, 24-bit mux/demux busswitch (25 w w w w w ) pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com 0.25 0.20 .025 bsc 0.635 .008 .008 .016 0-8? 0.20 0.40 .110 2.79 .010 gauge plane .291 .299 x.xx x.xx denotes dimensions in millimeters 7.39 7.59 .396 .416 10.06 10.56 .02 .04 0.51 1.01 .015 .025 0.381 0.635 .720 .730 18.29 18.54 .008 .0135 0.20 0.34 1 56 x 45? nom.] max 56-pin ssop (300 mil wide) - package code: v56 .002 .006 seating plane .07 .011 .004 .008 1 56 .236 .244 0.50 0.17 0.27 0.05 0.15 0.09 0.20 x.xx x.xx denotes dimensions in millimeters .018 .030 0.45 0.75 .047 max. 1.20 6.0 6.2 .547 .555 13.9 14.1 .319 8.1 .0197 bsc bsc 56-pin tssop (240 mil wide) - package code: a56
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