181 ps 7029a 03/13/96 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi5b3384/3384c/32384 (25 w w w w w ) 10-bit, 2-port busswitch product description: pericom semiconductors pi5c series of logic circuits are pro- duced in the companys advanced sub-micron cmos technology, achieving industry performance. the pi5c3384, pi5c3384c, and PI5C32384 are 10-bit, 2-port bus switches 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. two bus enable signals are provided, one for each of the upper and lower five bits of the two 10-bit buses. the PI5C32384 is designed with an internal 25 w resistor reducing noise reflection in high-speed applications. product pin configuration product pin description pin name description be a , be b bus enable inputs (active low) a 0 -a 9 bus a b 0 -a 9 bus b gnd ground v cc power product features: ? near-zero propagation delay ? low noise, 25 w version (PI5C32384) ?5 w switches connect inputs to outputs (pi5c3384) ? direct bus connection when switches are on ? ultra-low quiescent power (0.2 a typical) C ideally suited for notebook applications ? packages available: C 24-pin 300-mil wide plastic pdip (p) C 24-pin 150-mil wide plastic qsop (q) C 24-pin 150-mil wide plastic tqsop (r) C 24-pin 300-mil wide plastic soic (s) 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 function be a be b b 0-b4 b 5-b9 disconnect h h hi-z hi-z connect l h a 0-a4 hi-z connect h l hi-z a 5-a9 connect l l a 0-a4 a 5-a9 truth table (1) logic block diagram pi5c3384 pi5c3384c PI5C32384 (25 w w w w w ) 10-bit, 2-port busswitch be b be a a 9 a 5 b 9 b 5 a 4 a 0 b 4 b 0 note: 1. h = high voltage level x = dont care l = low voltage level hi-z = high impedance 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 a b 0 a 0 a 1 b 1 b 2 a 2 a 3 b 3 b 4 a 4 gnd vcc b 9 a 9 a 8 b 8 b 7 a 7 a 6 b 6 b 5 a 5 be b
ppi5b3384/3384c/32384 (25 w w w w w ) 10-bit, 2-port busswitch 182 ps7029a 03/13/96 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) 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 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. exposure 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 a, b v cc 1a v ik clamp diode voltage v cc = min., i in = C18 ma C0.7 C1.2 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, pi5c3384 5 7 w i on = 48 ma pi5c3384c 5 7 PI5C32384 20 28 40 v cc = min., v in = 2.4v, pi5c3384 10 15 w i on = 15 ma pi5c3384c 10 15 PI5C32384 20 35 48 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. 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
183 ps 7029a 03/13/96 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi5b3384/3384c/32384 (25 w w w w w ) 10-bit, 2-port busswitch power supply characteristics parameters description test conditions (1) min. typ (2) max. units i cc quiescent power v cc = max., pi5c3384 0.1 3.0 a supply current v in = gnd or v cc PI5C32384 pi5c3384c 60 100 a 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 1 or be 2 = gnd control input toggling 50% duty cycle pi5c3384/3384c switching characteristics over operating range pi5c3384/3384c 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 bx, bx to ax r l = 500 w t pzh bus enable time 1.5 6.5 ns t pzl be x to ax or bx t phz bus disable time 1.5 5.5 ns t plz bex to ax or bx 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. 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.
ppi5b3384/3384c/32384 (25 w w w w w ) 10-bit, 2-port busswitch 184 ps7029a 03/13/96 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI5C32384 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 bx, bx to ax r l = 500 w t pzh bus enable time 1.5 7.5 ns t pzl be x to ax or bx t phz bus disable time 1.5 5.5 ns t plz bex to ax or bx PI5C32384 switching characteristics over operating range 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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