1 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 PI5C32861 10-bit, 2-port bus switch with 25 w w w w w series resistor ps8104 03/14/97 product pin configuration nc a 0 a 1 a 2 a 3 a 4 a 5 a 6 a 7 a 8 a 9 gnd vcc be b 0 b 1 b 2 b 3 b 4 b 5 b 6 b 7 b 8 b 9 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 24-pin q24 s24 product pin description pin name description be bus enable input (active low) a 0 C 9 bus a b 0 C 9 bus b gnd ground v cc power function be a 0C9 disconnect h hi-z connect l b 0C9 truth table (1) note: 1. h = high voltage level l = low voltage level hi-z = high impedance logic block diagram 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI5C32861 10-bit, 2-port bus switch with 25 w w w w w series resistor product description pericom semiconductor?s pi5c series of logic circuits are produced using the company?s advanced 0.8 micron cmos technology, achieving industry leading performance. the PI5C32861 is a 10-bit, 2-port bus switch designed with a low on resistance that permits 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. the PI5C32861 is designed with an internal 25 w resistor that reduces noise reflection in high- speed applications product features ? near zero propagation delay ?5 w switches with 25 w series resistor connect inputs to outputs ? direct bus connection when switches are on ? ultra low quiescent power (0.2a typical) C ideally suited for notebook applications ? packages available: C 24-pin 150 mil wide plastic qsop (q) C 24-pin 300 mil wide plastic soic (s) be a 9 a 0 b 9 b 0
PI5C32861 10-bit, 2-port bus switch with 25 w w w w w series resistor 2 ps8104 03/14/97 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 ............................................................................ 120ma 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 specifica- tion 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 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 = 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, i on = 48ma 18 28 40 w v cc = min., v in = 2.4v, i on = 15ma 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 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.)
3 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 PI5C32861 10-bit, 2-port bus switch with 25 w w w w w series resistor ps8104 03/14/97 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 10 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 PI5C32861 com. parameters description conditions (1) min max units t plh propagation delay (2,3) c l = 50pf 1.25 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 to ax or bx t phz bus disable time 1.5 5.5 ns 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 1.25ns 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 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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