1 ps7026h 10/11/10 truth table (1) function be x a19-a0 disconnect h hi-z connect l b19-b0 note: 1. h = high voltage level, l = low voltage level, hi-z = high impedance pin description pin name description bex bus enable inputs (active low) a19-a0 bus a b19-b0 bus b pin confguration pi5c16861 features ? near-zero propagation delay ? 5? or 25? switches connect inputs to outputs ? direct bus connection when switches are on ? 32x384 function with fow through pinout make board layout easier ? ultra-low quiescent power (0.2a typical) C ideally suited for notebook applications ? industrial operating temperature: C40c to +85c ? packaging (pb-free & green): C 48-pin 240-mil wide plastic tssop (a) description pericom semico nductors pi5c16861 is confgured as a 20-bit, 2-port bus switch designed with a low on-resistance (5?) allowing inputs to be connected directly to outputs. the bus switch creates no a dditional p ropagational d elay o r a dditional g round b ounce n oise. t he switches are turned on by the bus enable (bex) input signal. block diagram nc a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 gnd nc a10 a11 a12 a13 a14 a15 a16 a17 a18 a19 gnd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 vcc be1 b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 vcc be2 b10 b11 b12 b13 b14 b15 b16 b17 b18 b19 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 be1 a9 a0 b9 b0 be2 a19 a10 b19 b10 20-bit, 2-port bus switch 11-0008
2 ps7026h 10/11/10 pi5c16861 20-bit, 2-port bus switch dc electrical characteristics (over the operating range, t a = C40c to +85c, v cc = 5v 10%) parameters description test conditions (1) min. typ. (2) max. units v ih input high v oltage guaranteed logic high level 2.0 v v il input low voltage guaranteed logic low level C0.5 0.8 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 i ozh high impedance output current 0 a, b v cc 1 v ik clamp diode voltage v cc = min., i in = C18ma C0.7 C1.2 v i on short circuit current (3) a (b) = 0v, b (a) = v cc 100 ma v h input hysteresis at con- trol pins 150 mv r on switch on-resistance (4) v cc = min., v in = 0.0v 5 7 ? v cc = min., v in = 2.4v 10 15 maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) note: stresses greater than those listed under maximum ra t - ings 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 specifcation is not implied. exposure to absolute maximum rating conditions for ex - tended periods may affect reliability. capacitance (t a = 25c, f = 1 mhz) parameters (1) description test conditions typ. units c in input capacitance v in = 0v 6 pf c off a/b capacitance, switch off 6 c on a/b capacitance, switch on 8 notes: 1. for max. or min. conditions, use appropriate value specifed under electrical characteristics for the applicable device type. 2. typical values are at v cc = 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. storage t emperature ............................................................. C65c to +150c ambient t emperature with power applied ............................ C40c to +85c supply v oltage to ground potential (inputs & v cc only) ...... C0.5v to +7.0v supply v oltage 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 notes: 1. this parameter is determined by device characterization but is not production tested. 11-0008
3 ps7026h 10/11/10 pi5c16861 20-bit, 2-port bus switch power supply characteristics parameters description test conditions (1) min. typ. (2) max. units i cc quiescent power supply current v cc = max. v in = gnd or v cc 0.1 10 a i cc supply current per input @ ttl high v cc = max. v in = 3.4v (3) 2.5 ma i ccd supply current per input per mhz (4) v cc = max., a and b pins open be x = gnd, control input t oggling 50% duty cycle 0.25 ma/ mhz notes: 1. for max. or min. conditions, use appropriate value specifed under electrical characteristics for the applicable device. 2. typical values are at v cc = 5.0v, +25c ambient. 3. per ttl driven input ( v in = 3.4v, control inputs only); a and b pins do not contribute to i cc . 4. this current applies to the control inputs only and represent the current required to switch internal capacitance at the specifed frequency. the a and b inputs generate no signifcant ac or dc currents as they transition. this parameter is not tested, but is guaranteed by design. pi5c16861 switching characteristics over operating range parameters description conditions pi5c16861 unit com. min. max. t plh t phl propagation delay (1,2) ax to bx, bx to ax c l = 50pf r l = 500? 1.25 ns t pzh t pzl bus enable t ime bex to ax or bx 1.5 6.5 t phz t plz bus disable t ime bex to ax or bx 1.5 5.5 notes: 1. this parameter is guaranteed but not tested on propagation delays. 2. 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. 11-0008
4 ps7026h 10/11/10 pi5c16861 20-bit, 2-port bus switch packaging mechanical: 48-pin bsqop (b) ordering information ordering code package type package description PI5C16861AE a pb-free & green, 48-pin, tssop notes: ? thermal characteristics can be found on the company web site at www.pericom.com/packaging/ ? e = pb-free & green ? adding an x suffx = t ape/reel pericom semiconductor corporation ? 1-800-435-2336 ? www .pericom.com 1 : 48-pin, 154-mil wide bqsop noitpircsed :edoc egakcap 1210-dp :# lortnoc tnemucod f:noisiver 80/51/01 :etad b48 08-0522 11-0008
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