1 ps8193b 11/09/98 logic block diagram 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 truth table (1) note: 1. h = high voltage level l = low voltage level hi-z = high impedance pin name description 1oe, 2oe bus enable inputs (active low) 1a1-1a10, 2a1-2a10 bus a 1b1 - 1b10, 2b1 - 2b10 bus b product pin description product pin configuration product features ? near-zero propagation delay ?5 w or 25w switches connect inputs to outputs ? fair switching speed - 4.5ns max. ? 32x384 function with flow through pinout make board layout easier ? permits hot insertion. ? vcc operating range: 3.0v to 3.6v ? industrial operating temperature: C40c to +85c ? packages available: C 48-pin 150-mil wide plastic qsop (b) C 48-pin 240-mil wide plastic tssop (a) C 48-pin 300-mil wide plastic ssop (v) product description pericom semiconductors pi3b series of busswitch circuits are produced in the companys advanced 0.35 micron cmos technology, achieving industry leading speed. the PI3B16210 is configured as 3.3 volt 20-bit, 2-port bus switches designed with a low on resistance (5 w ) 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 (xoe) input signal. the pi3b162210 device has a built-in 25-ohm series resistor to reduce noise resulting from reflections, thus eliminating the need for an external terminating resistor. 1oe 1a 10 1a 1 1b 10 1b 1 2oe 2a 10 2a 1 2b 10 2b 1 s t u p n is t u p t u o / s t u p n i e o 1e o 2b 1 , a 1b 2 , a 2 ll b 1 = a 1b 2 = a 2 lh b 1 = a 1z hl z b 2 = a 2 hh z z PI3B16210 pi3b162210 (25 w w w w w ) 3.3v, hot insertion 20-bit, 2-port busswitch 48-pin
2 ps8193b 11/09/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI3B16210/162210 3.3v, hot insertion, 20-bit, 2-port busswitch dc electrical characteristics (over the operating range, t a = C40c to +85c, v cc = 3.0v to 3.6v) 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 i input current v cc = max. v in = v cc or gnd 1 a v cc = 0v, v in = v cc 1a i ozh high impedance output current 0 a, b v cc 10a v ik clamp diode voltage v cc = min, i in = C18ma C0.7 C1.2 v r on switch on resistance (3) v cc = 3v, v in = 0.0v, 16210 5 8 w i on = 24 ma, 64ma 162210 20 28 40 v cc = 3v, v in = 2.4v, 16210 15 w i on = 15ma 162210 20 35 48 storage temperature ................................................................. C65c to +150c ambient temperature with power applied .................................. C0c to +85c supply voltage range .................................................................. C0.5v to +4.6v dc input voltage ......................................................................... C0.5v to +4.6v 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 opera- tional sections of this specification is not implied. exposure to absolute maximum ra ting conditions for extended periods may affect reliability. capacitance (t a = 25c, f = 1 mhz) parameters (4) description test conditions typ units c in input capacitance v in = 0v 3.0 c off a/b capacitance, switch off v in = 0v 8.5 pf c on a/b capacitance, switch on v in = 5v 17.0 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 = 3.3v, t a = 25c ambient and maximum loading. 3. 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. 4. 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.)
PI3B16210/162210 3.3v, hot insertion, 20-bit, 2-port busswitch 3 ps8193b 11/09/98 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 com. parameters description conditions (1) min max units tplh propagation delay (2,3) c l = 50pf 16210 0.25 tphl ax to bx, bx to ax r l = 500 w 162210 1.25 tpzh bus enable time 1 4.5 ns tpzl be to ax or bx tphz bus disable time 1 5.0 t plz be to ax or bx pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com 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 10 a supply current d i cc supply current per v cc = max. v in = 3.0v (3) 750 a 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 = 3.3v, +25c ambient. 3. per ttl driven input (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 notes: 1. see test circuit and wave forms. 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. 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. c l = 50pf, r l = 500 w, r = 500w
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