1 ps8180a 11/09/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3b16212 PI3B162212 (25 w w w w w ) 3.3v, 24-bit bus exchange switch product description pericom semiconductors pi3b series of logic circuits are produced in the companys advanced 0.35 micron cmos technology. the pi3b16212 and PI3B162212 are 3.3 volt, 24-bit bus exchange switches designed with a low on resistance allowing inputs to be connected directly to outputs. the devices operate as a 24-bit bus switch or as a 12-bit exchanger, providing data exchange between the four signal ports via the data select pins (s0-s2). the PI3B162212 device has a built-in 25-ohm series resistor to reduce noise due to reflections, thus eliminating the need for an external terminating resistor. product features ? near-zero propagation delay ?5 w switches connect inputs to outputs ? direct bus connection when switches are on ? fast switching speed - 5ns (max.) ?v cc operating range: 3.0v to 3.6v ? industrial operating temperature: C40c to +85c ? packages available: C 56-pin 240-mil wide thin plastic tssop (a) C 56-pin 300-mil wide plastic ssop (v) product pin configuration 56-pin a, v 11 a 11 b 12 a 12 b flow control one of twelve channels s 0 s 1 s 2 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 11 a 12 a s 0 21 a 22 a 31 a 32 a 41 a 42 a 51 a 52 a 61 a 62 a v cc 71 a 72 a 81 a gnd 82 a 91 a 92 a 10 1 a 10 2 a 11 1 a 11 2 a 12 1 a 12 2 a gnd 11 b 12 b s 1 21 b 22 b 31 b 32 b 41 b 42 b 51 b 52 b 61 b 62 b 71 b 72 b 81 b gnd 82 b 91 b 92 b 10 1 b 10 2 b 11 1 b 11 2 b 12 1 b 12 2 b s 2 function s2 s1 s0 a1 a2 disconnect l llzz a1 to b1 l l h b1 z a1 to b2 l h l b2 z a2 to b1 l h h z b1 a2 to b2 h l l z b2 disconnect h l h z z a1 to b1, a2 to b2 h h l b1 b2 a1 to b2, a2 to b1 h h h b2 b1 logic block diagram product pin description pin name i/o description s0-s2 i select inputs xax i/o bus a xb xi/o bus b note: 1. h = high voltage level l = low voltage level z = high impedance truth table
pi3b16212/162212 3.3v, 24-bit bus-exchange switch 2 ps8180a 11/09/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012 12345678901 2 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 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 ?0.5 ? 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 i ozh high impedance output current 0 a, b 3 v cc , switches off ? ? 1 a v ik clamp diode voltage v cc = min., i in = ?18ma ?0.7 ?1.2 v r on switch on resistance (3) v cc = min., v in = 0.0v, 16212 ? 5 8 w i on = 64ma 162212 20 28 40 v cc = min., v in = 2.4v, 16212 ? 10 15 w i on = 15ma 162212 20 35 48 maximum ratings (above which the useful life may be impaired. for user guidelines, not tested. ) storage temperature ............................................. ?65c to +150c ambient temperature with power applied ............ ?40c to +85c supply voltage range .............................................. ?0.5v to +4.6v dc input voltage ..................................................... ?0.5v to +4.6v dc output current ................................................................ 120 ma 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 specification is not implied. expo- sure to absolute maximum rating conditions for extended peri- ods may affect reliability. capacitance (t a = 25c, f = 1 mhz) parameters (4) description test conditions typ. units c in input capacitance v in = 0v 3.0 pf c off a/b capacitance, switch off v in = 0v 14.0 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.
pi3b16212/162212 3.3v, 24-bit bus-exchange switch 3 ps8180a 11/09/98 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 supply current per v cc = m ax .v in = 3.0 v (3) 750 a input @ ttl high i ccd supply current per v cc = max., v in = 3v 0.25 ma/ input per mhz (4) a and b pins open mhz control input toggling 50% duty cycling 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 each input that is at the specified ttl voltage level rather than v cc or gnd. 4. per ttl driven input (control inputs 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. pi3b16212 switching characteristics over operating range pi3b16212 com. parameters description conditions (1) min. max. units t plh propagation delay (2,3) c l = 50pf 16212 0.25 t phl ax to bx, bx to ax r l = 500 w 162212 1.25 t pzh bus enable time c l = 50pf, 1 4.5 ns t pzl be to ax or bx r l = 500 w, t phz bus disable time r = 500 w 15 t plz be to ax or bx notes: 1. see test circuit and waveforms. 2. this parameter is guaranteed but not tested on propagation delays. 3. 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. propagatio nal 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.
pi3b16212/162212 3.3v, 24-bit bus-exchange switch 4 ps8180a 11/09/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012 12345678901 2 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 description: 56-pin ssop (300 mil wide) package code: v56 document control no. pd-1402 revision 1/17/97 pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com 0.025 0.025 typical 0.635 0.635 0.008 0.20 0.005 0.010 0 - 8? 0.127 0.254 0.095 0.108 2.41 2.74 0.010 0.25 gauge plane 0.291 0.299 x.xx x.xx 7.39 7.59 0.396 0.416 10.06 10.56 0.02 0.04 0.55 1.01 0.088 0.092 2.24 2.34 0.015 0.025 0.381 0.635 0.720 0.730 18.29 18.54 0.008 0.0135 0.20 0.34 1 56 x 45? denotes dimensions in millimeters
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