203 ps8120 08/6/97 product description: pericom semiconductors pi5c series of logic circuits are pro- duced in the companys advanced 0.8 micron cmos technology, achieving industry leading performance. the pi5c34x383 and pi5c34x2383 are 32-bit bus switches with exchange designed with a low on resistance allowing inputs to be connected directly to outputs. the bus switch creates no additional propagational delay or additional ground bounce noise. the switches are turned on by the bus enable (be) input signal, and the bus exchange (bx) input signal offers nibble swapping of the ab and cd pairs of signals. this exchange configuration allows byte swapping of buses in systems. it can also be used as a quad 2-to-1 multiplexer and to create low delay barrel shifters, etc. the pi5c34x2383 is designed with an internal 25 w resistor reducing noise reflection in high-speed applications. applications: 16-wide 2:1 mux, byte swapping, and hot insertion. 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi5c34x383/pi5c34x2383 32-bit busswitch/exchange logic block diagram product features: ? near-zero propagation delay ? low noise, 25 w version (pi5c32383) ?5 w switches connect inputs to outputs (pi5c3383) ? direct bus connection when switches are on ? ultra-low quiescent power (0.2 a typical) C ideally suited for notebook applications ? packages available: C 80-pin 150-mil wide plastic qsop (b) function be n bxn a 0-a15 b 0-b15 disconnect h x hi-z hi-z connect l l c 0- c 15 d 0- d 15 exchange l h d 0- d 15 c 0- c 15 truth table (1) note: 1. h = high voltage level, x = dont care, l = low voltage level, hi-z = high impedance be1 bx1 b 3 a 3 d 3 c 3 b 0 a 0 d 0 c 0 be2 bx2 b 7 a 7 d 7 c 7 b 4 a 4 d 4 c 4 be1 bx1 b 11 a 11 d 11 c 11 b 8 a 8 d 8 c 8 be2 bx2 b 15 a 15 d 15 c 15 b 12 a 12 d 12 c 12
ppi5c34x383/pi5c34x2383 32-bit busswitch/exchange 204 ps8120 08/6/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 product pin configuration product pin description pin name description ben bus enable input (active low) bxn bus exchange input ax bus a bx bus b cx bus c dx bus d gnd ground v cc power be1 1 c 0 2 a 0 3 b 0 4 d 0 5 c 1 6 a 1 7 b 1 8 d 1 9 gnd 10 be2 11 c 4 12 a 4 13 b 4 14 d 4 15 c 5 16 a 5 17 b 5 18 d 5 19 gnd 20 be3 21 c 8 22 a 8 23 b 8 24 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 d 8 25 c 9 26 a 9 27 b 9 28 d 9 29 gnd 30 be4 31 c 12 32 a 12 33 b 12 34 d 12 35 c 13 36 a 13 37 b 13 38 d 13 39 gnd 40 vcc d 3 b 3 a 3 c 3 d 2 b 2 a 2 c 2 bx 1 vcc d 7 b 7 a 7 c 7 d 6 b 6 a 6 c 6 bx 2 vcc d 11 b 11 a 11 56 55 54 53 52 51 50 49 48 c 11 d 10 b 10 a 10 c 10 bx 3 vcc d 15 b 15 47 46 45 44 43 42 41 a 15 c 15 d 14 b 14 a 14 c 14 bx 4 80-pin b80
pi5c34x383/pi5c34x2383 32-bit busswitch/exchange 205 ps8120 08/6/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 storage temperature ............................................................................... C65c to +150c ambient temperature with power applied ............................................. C40c to +85c supply voltage to ground potential (inputs & vcc only) ..................... C0.5v to +7.0v supply voltage to ground potential (outputs & d/o only) .................. C0.5v to +7.0v dc input voltage ...................................................................................... C0.5v to +7.0v dc output current ................................................................................................. 120 ma power dissipation ...................................................................................................... 0.5w note: stresses greater than those listed under maxi- mum ratings may cause permanent damage to the device. this is a stress rating only and func- tional 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 periods may affect reliability. dc electrical characteristics (over the operating range, t a = C40c 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 C0.5 0.8 v i ih input high current v cc = max., v in = v cc 1a i il input low current v cc = max., v in = gnd 1 a i ozh high impedance output current 0 - ab, cd - v cc 1a v ik clamp diode voltage v cc = min., i in = C18 ma - 0.7 - 1.2 v i os short circuit current (3) ab (cd) = 0v, cd (ab) = 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, pi5c3383 5 7 w i on = 48 ma pi5c32383 18 28 40 v cc = min., v in = 2.4v, pi5c3383 10 15 w i on = 15 ma pi5c32383 18 35 48 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 ab/cd capacitance, switch off v in = 0v 6 pf c on ab/cd 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 ab and cd pin at indicated current through the switch. on resistance is determined by the lower of the voltages on the two (a or b, c or d) 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.)
ppi5c34x383/pi5c34x2383 32-bit busswitch/exchange 206 ps8120 08/6/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 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) ab and cd pins open mhz be = gnd control input toggling 50% duty cycle notes: 1. for conditions shown as max. or min., use appropriate value specified under electrical characteristics for the applicable dev ice. 2. typical values are at vcc = 5.0v, +25c ambient. 3. per ttl driven input (v in = 3.4v, control inputs only); a, b, c, and d 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, b, c, and d inputs generate no significant ac or dc currents as they transition. this parameter is not tested , but is guaranteed by design. 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. pi5c34x383 switching characteristics over operating range pi5c34x383 com parameters description conditions (1) min typ 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 w 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 to cx or dx
pi5c34x383/pi5c34x2383 32-bit busswitch/exchange 207 ps8120 08/6/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 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. pi5c34x2383 switching characteristics over operating range pi5c34x2383 com parameters description conditions (1) min typ max unit t plh propagation delay (2,3) c l = 50 pf 1.25 ns t phl ax to cx, bx to dx r l = 500 w 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 to cx or dx 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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