pi5c3400 4-bit, 4-port bus exchange switch 1 ps8191 05/07/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 logic block diagram 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi5c3400 4-bit, 4-port bus exchange switch product description: pericom semiconductor?s pi5c series of logic circuits are pro-duced in the company?s advanced submicron cmos technology, achieving industry leading speed grades. the pi5c3400 is a 4-bit, 4-port bus switch with individual exchanges designed with a low on resistance (5ohm) allowing inputs to be connected directly to outputs. the bus switch creates no additional propagational delay or ground bounce noise. the switches are turned on by the bus enable (be) input signal, and the bus exchange (bx 0 ?bx 3 ) input signals offer individual bit swapping of the ab and cd signal pairs. this exchange configuration allows bit swapping of buses in systems. product features: ? zero propagation delay ? zero ground bounce in flow-through mode ? 5ohm switches connect inputs to outputs ? direct bus connection when switches are on ? ultra low quiescent power (0.2 a typical) ? ideally suited for notebook applications ? packages available: ? 24-pin 300 mil wide plastic pdip (p) ? 24-pin 150 mil wide plastic qsop (q) ? 24-pin 300 mil wide plastic soic (s) bx 0 b 0 a 0 d 0 c 0 be bx 1 bx 2 bx 3 b 1 a 1 d 1 c 1 b 2 a 2 d 2 c 2 b 3 a 3 d 3 c 3 function be bx 0 bx 1 bx 2 bx 3 a 0?3 b 0?3 disconnect hxxxxhi-zhi-z connect l bx i = l c 0?3 d 0?3 exchange l bx i = h d 0?3 c 0?3 note: 1. h = high voltage level x = don?t care l = low voltage level hi-z = high impedance i = 0, 1, 2, or 3 truth table (1) product pin configuration 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 be c 0 a 0 b 0 d 0 c 1 a 1 b 1 d 1 bx 0 bx 1 gnd vcc d 3 b 3 a 3 c 3 d 2 b 2 a 2 c 2 nc bx 3 bx 2 24-pin p q s
2 ps8191 05/07/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi5c3400 4-bit, 4-port bus exchange switch storage temperature ............................................................ ?65c to +150c ambient temperature with power applied ............................ ?40c to +85c supply voltage to ground potential (inputs & vcc only) ..... ?0.5v to +7.0v supply voltage to ground potential (outputs & d/o only) .. ?0.5v to +7.0v dc input voltage ..................................................................... ?0.5v to +7.0v dc output current ............................................................................... 120 ma power dissipation .................................................................................... 0.5w note: stresses greater than those listed under maximum ratings may cause permanent dam- age 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 op- erational sections of this specification is not im- plied. exposure to absolute maximum rating condi- tions for extended periods may affect reliability. dc electrical characteristics (over the operating range, t a = ?40c to +85c, v cc = 5v 5%) 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 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 a i ozh high impedance output current 0 a, b v cc 1 a v ik clamp diode voltage v cc = min., i in = ?18 ma ?0.7 ?1.2 v i os short circuit current (3) a (b) = 0v, b (a) = v cc 100 ma v h input hysteresis at control pins 150 mv r on switch on resistance (4) v cc = min., v in = 0.0v, i on = 48 ma 5 7 ohm v cc = min., v in = 2.4v, i on = 15 ma 10 15 capacitance (t a = 25c, f = 1 mhz) parameters (5) description test conditions typ max. units c in input capacitance v in = 0v 6 pf c off a/b capacitance, switch off v in = 0v 6 pf c on a/b capacitance, switch on v in = 0v 8 pf notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device type. 2. typical values are at vcc = 5.0v, 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. 5. 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.) product pin description pin name description be bus enable input (active low) ax, bx, cx, dx bus a, bus b, bus c, bus d bx0 bus exchange (bit 0) bx1 bus exchange (bit 1) bx2 bus exchange (bit 2) bx3 bus exchange (bit 3) nc no connect gnd ground v cc power
pi5c3400 4-bit, 4-port bus exchange switch 3 ps8191 05/07/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 power supply characteristics parameters description test conditions (1) min. typ (2) max. units i cc quiescent power v cc = max. v in = gnd or v cc 0.1 3.0 a supply current d i cc supply current per v cc = max. v in = 3.4v (3) 2.5 ma input @ ttl high i ccd supply current per v cc = max., 0.25 ma/ input per mhz (4) a and b pins open mhz be = gnd control input toggling 50% duty cycle notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device. 2. typical values are at vcc = 5.0v, +25c ambient. 3. per ttl driven input (v in = 3.4v, control inputs only); a and b pins do not contribute to icc. 4. 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. switching characteristics over operating range pi5c3400 com. parameters description conditions (1) min. max. unit t plh propagation delay (2,3) c l = 50 pf 0.25 ns t phl ax to cx, bx to dx r l = 500 ohm t pzh bus enable time 1.5 6.5 ns t pzl be to cx or dx t phz bus disable time 1.5 5.5 ns t plz be to cx or dx t bx bus exchange time 1.5 6.5 ns bx x to cx or dx 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 0.25 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. 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 interact ion with the load on the driven side. pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com
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