1 ps8390 06/04/99 product description pericom semiconductor?s pi5c series of logic circuits are produced using the company?s advanced submicron cmos technology, achieving industry performance. the PI5C3384A is a 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. 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 ? direct bus connection when switches are on ? ultra-low quiescent power (0.2a typical) ? ideally suited for notebook applications ? packages available: ? 24-pin 300-mil wide plastic pdip (p24) ? 24-pin 150-mil wide plastic qsop (q24) ? 24-pin 300-mil wide plastic soic (s24) 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 PI5C3384A 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 24-pin p24 q24 s24
2 ps8390 06/04/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI5C3384A 10-bit, 2-port busswitch 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 damage to the device. this is a stress rating only and functional operation of the device at these or any other condi- tions above those indicated in the operational sec- tions 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, ta = ?40c to +85c, vcc = 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 = C18ma 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, 25w i on = 48ma v cc = min., v in = 2.4v, 7 12 w i on = 15ma 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 units c in input capacitance v in = 0v 6 pf c off a/b capacitance, switch off v in = 0v 9 pf c on a/b capacitance, switch on v in = 0v 22 pf maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.)
3 ps8390 06/04/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI5C3384A 10-bit, 2-port busswitch PI5C3384A parameters description conditions (1) min. max. units t plh propagation delay (2,3) c l = 50pf 0.25 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 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 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 0.25ns 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. 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. PI5C3384A switching characteristics over operating range pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com s r e t e m a r a pn o i t p i r c s e ds n o i t i d n o c t s e t. n i m. p y t ) 2 ( . x a ms t i n u i c c r e w o p t n e c s e i u q t n e r r u c y l p p u s v c c , . x a m = v n i v r o d n g = c c ?1 . 00 . 3 m a d i c c r e p t n e r r u c y l p p u s h g i h l t t @ t u p n i v c c , . x a m = v n i= v 4 . 3 ) 3 ( ?? 5 . 2a m i d c c r e p t n e r r u c y l p p u s z h m r e p t u p n i ) 4 ( v c c , . x a m = n e p o s n i p b d n a a d n g = 2 e b r o 1 e b g n i l g g o t t u p n i l o r t n o c e l c y c y t u d % 0 5 ?? 5 2 . 0 / a m z h m
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