1 ps7025d 01/24/06 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 features: ? near-zero propagation delay ? 5-ohm switches connect inputs to outputs ? direct bus connection when switches are on ? ultra-low quiescent power (0.2 a typical) ? ideally suited for notebook applications ? pin compatible with 74 series16245 ? industrial operating temperature: ?40c to +85c ? packages (pb-free & green available): ? 48-pin 240-mil wide thin plastic tssop (a) ? 48-pin 150-mil wide plastic bqsop (b) ? 48-pin 300-mil wide plastic ssop (v) pi5c16245 pi5c162245 (25-ohm) 16-bit, 2-port bus switch block diagram pin configuration pin description pin name i/o description nbe i bus enable input (active low) na 0 -na 7 i/o bus a nb 0 -nb 7 i/o bus b function nbe na 0?7 disconnect h hi-z connect l nb 0?7 truth table (1) note: 1. h = high voltage level l = low voltage level hi-z = high impedance description: pericom semiconductor?s pi5c16245 and pi5c162245 are 16-bit, 2- port bus switches that are pin compatible with the 74 series 16245 16- bit transceiver. two enable signals (nbe) turn the switches on similar to the enable signals of the 16245. the bus switch creates no additional propagation delay or additional ground bounce noise. the pi5c162245 device has a built-in 25-ohm series resistor to reduce noise due to reflections, thus eliminating the need for an external terminating resistor. 1 be 1 a 7 1 a 0 1 b 7 1 b 0 2 be 2 a 7 2 a 0 2 b 7 2 b 0 nc 1 1 b 0 2 1 b 1 3 gnd 4 1 b 2 5 1 b 3 6 v cc 7 1 b 4 8 1 b 5 9 gnd 10 1 b 6 11 1 b 7 12 2 b 0 13 2 b 1 14 gnd 15 2 b 2 16 2 b 3 17 v cc 18 2 b 4 19 2 b 5 20 gnd 21 2 b 6 22 2 b 7 23 nc 24 1 be 48 1 a 0 47 1 a 1 46 gnd 45 1 a 2 44 1 a 3 43 v cc 42 1 a 4 41 1 a 5 40 gnd 39 1 a 6 38 1 a 7 37 2 a 0 36 2 a 1 35 gnd 34 2 a 2 33 2 a 3 32 v cc 31 2 a 4 30 2 a 5 29 gnd 28 2 a 6 27 2 a 7 26 2 be 25
pi5c16245/162245 16-bit, 2-port bus switch 2 ps7025d 01/24/06 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) storage temperature .................................................................... ?55c to +125c ambient temperature with power applied .................................... ?40c to +85c supply voltage to ground potential ............................................... ?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 maxi- mum 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 = ?40c to +85c, v cc = 5v 10%) 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 ?0.5 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 = ?18 ma ?0.7 ?1.2 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, 16245 5 7 ohm i on = 48 ma 162245 20 28 40 v cc = min., v in = 2.4v, 16245 10 15 ohm i on = 15 ma 162245 20 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 9 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.
pi5c16245/162245 16-bit, 2-port bus switch 3 ps7025d 01/24/06 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 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 3.0 a supply current 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 nbe = 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 is guaranteed by design. pi5c16245 switching characteristics over operating range pi5c16245 com. parameters description co nditions (1) min max unit t plh propagation delay (2,3) c l = 50 pf 0.25 n s t phl xax to xbx, xbx to xax r l = 500-ohm t pzh bus enable time 1.5 6.5 ns t pzl x be to xax or xbx t phz bus disable time 1.5 5.5 ns t plz xbe to xax or xbx 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 cap acitance. 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. propagational delay of the bus switch when use d 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. pi5c162245 com. parameters description conditions (1) min max unit tplh propagation delay (2,3) c l = 50 pf 1.25 n s tphl xax to xbx, xbx to xax r l = 500-ohm tpzh bus enable time 1.5 6.5 ns tpzl xbe to xax or xbx tphz bus disable time 1.5 5.5 ns tplz xbe to xax or xbx pi5c162245 switching characteristics over operating range
pi5c16245/162245 16-bit, 2-port bus switch 4 ps7025d 01/24/06 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pulse generator d.u.t. v in r t v out c l 500 500 50pf v cc 7v open test disable low enable low t pd switch closed closed open definitions: c l = load capacitance (includes jig and probe capacitance) r t = termination resistance (should be equal to z out of the pulse generator) control input output normally low output normally high t pzl t plz 0v 1.5v 3v 0v 1.5v 3v 0v v ol t pzh t pzh 3v 1.5v 1.5v enable switch switch gnd disable 0.3v v oh 0.3v 1. input control enable = low; input control disable = high 2. pulse generator for all pulses: rate < 1.0 mhz; z out <50 ; t f , t r < 2.5ns same phase input transisiton opposite phase input transisiton t plh t plh t phl t phl 0v output v oh v ol 3v 1.5v 1.5v 0v 3v 1.5v 1.5v 1.5v enable and disable timing test circuits switch position propagation delay
pi5c16245/162245 16-bit, 2-port bus switch 5 ps7025d 01/24/06 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 packaging mechanical: 48-pin tssop (a) .236 .244 .488 .496 .002 .006 seati n g pla n e .007 .010 .0197 bsc .004 .008 .319 1 48 12.4 12.6 6.0 6.2 0.50 0.17 0.27 8.1 0.05 0.15 0.09 0.20 x.xx x.xx de n otes dime n sio n s i n millimeters .018 .030 0.45 0.75 .047 1.20 max bsc packaging mechanical: 48-pin ssop (v) 0.20 0.51 1.01 0.25 0.381 0.635 .008 .008 .016 0-8? 0.20 0.40 .110 2.79 .010 ga u ge plane .02 .04 .015 .025 x 45? .025 bsc 0.635 .291 .299 x.xx x.xx de n otes dime n sio n s i n millimeters 7.39 7.59 .395 .420 10.03 10.67 .620 .630 15.75 16.00 .008 .0135 0.20 0.34 1 48 n om. max
pi5c16245/162245 16-bit, 2-port bus switch 6 ps7025d 01/24/06 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 18004352336 packaging mechanical: 48-pin bqsop (b) .014 .0157 bsc 0.40 0.356 .008 0.20 .002 .009 5 ? 0.05 0.25 .079 2.0 .010 0.25 ga u ge plane .150 .157 x.xx x.xx de n otes dime n sio n s i n millimeters 3.80 4.00 .228 .244 5.80 6.20 .020 .029 0.50 0.75 .063 1.60 .015 0.381 .386 .394 9.80 10.00 .0051 .009 0.13 0.23 1 48 x 45 ? bsc n om max n om ref notes: ? thermal characteristics can be found on the company web site at www.pericom.com/packaging/ ? e = pb-free and green ? x suffix = tape/reel ordering information ordering code package code package type pi5c16245a a 48-pin tssop pi5c16245ae a pb-free & green, 48-pin tssop pi5c16245v v 48-pin bqsop pi5c16245ve v pb-free & green, 48-pin bqsop pi5c16245b b 48-pin ssop pi5c16245be b pb-free & green, 48-pin ssop pi5c162245a a 48-pin tssop pi5c162245ae a pb-free & green, 48-pin tssop pi5c162245v v 48-pin bqsop pi5c162245ve v pb-free & green, 48-pin bqsop pi5c162245b b 48-pin ssop pi5c162245be b pb-free & green, 48-pin ssop
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