1 ps8153d 01/05/00 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3b3125 pi3b3126 product description pericom semiconductor?s pi3b series of logic circuits are produced using the company?s advanced sub micron cmos technology, achieving industry leading speed grades. the pi3b3125 and pi3b3126 are 3.3 volt, 4-bit bus switches designed with four individual 5ohm bus switches with fast indiviual enables in an industry standard 74xx125/126 pinout. when enabled via the associated bus enable (be) pin, the ?a? pin is directly connected to the ?b? pin for that particular gate. the bus switch introduces no additional propagation delay or additional ground bounce noise. the pi3b3125 device has active low enables, and the pi3b3126 has active high enables. product features ? near zero propagation delay ? 5 ohm switches connect inputs to outputs ? fast switching speed - 4ns max. ? permits hot insertion ? ultra low quiescent power (0.1a typical) ? ideally suited for notebook applications ? packages available: ? 14-pin 150 mil wide plastic soic (w) ? 14-pin 170 mil wide plastic tssop (l) ? 16-pin 150 mil wide plastic qsop (q) pi3b3125 logic block diagram pi3b3126 logic block diagram be0 a0 b0 be1 a1 b1 be2 a2 b2 be3 a3 b3 be0 a0 b0 be1 a1 b1 be2 a2 b2 be3 a3 b3 3.3v, hot insertion, 4-bit, 2-port bus switch with individual enables
pi3b3125/pi3b3126 3.3v, hot insertion, 4-bit, 2-port busswitch 2 ps8153d 01/05/00 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3b3125 14-pin product pin configuration pi3b3126 14-pin product pin configuration pi3b3125 16-pin product pin configuration pi3b3126 16-pin product pin configuration product pin description pin name description ben switch enable (pi3b3125) ben switch enable (pi3b3126) a3-a0 bus a b3-b0 bus b v cc power gnd ground pi3b3125 pi3b3126 ben ben an bn vcc function x* x hi-z hi-z gnd disconnect h l hi-z hi-z v cc disconnect lhbnanv cc connect truth table (1) notes: 1. h = high voltage level, l = low voltage level hi-z = high impedance, x = dont care * a pull-up resistor should be provided for power-up protection. storage temperature .......................................................... C65c to +150c ambient temperature with power applied .......................... C40c to +85c supply voltage to ground potential (inputs & v cc only) ... C0.5v to +4.6v supply voltage to ground potential (outputs & d/o only) . C0.5v to +4.6v dc input voltage ................................................................... C0.5v to +4.6v dc output current ..............................................................................120ma power dissipation ................................................................................... 0.5w note: stresses greater than those listed under maximum ratings may cause permanent damage to the de- vice. this is a stress rating only and functional opera- tion 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. 1 2 3 4 5 6 7 14 13 12 11 10 9 8 vcc be3 a3 b3 be2 a2 b2 be0 a0 b0 be1 a1 b1 gnd 14-pin w14 1 2 3 4 5 6 7 14 13 12 11 10 9 8 vcc be3 a3 b3 be2 a2 b2 be0 a0 b0 be1 a1 b1 gnd 14-pin w14 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 vcc be3 a3 b3 be2 a2 b2 nc nc be0 a0 b0 be1 a1 b1 gnd 16-pin q16 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 vcc be3 a3 b3 be2 a2 b2 nc nc be0 a0 b0 be1 a1 b1 gnd 16-pin q16 maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) w, l w, l qq
pi3b3125/pi3b3126 3.3v, hot insertion, 4-bit, 2-port busswitch 3 ps8153d 01/05/00 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 capacitance (t a = 25c, f = 1 mhz) parameters (4) description test conditions typ. units c in input capacitance v in = 0v 3.5 pf c off a/b capacitance, switch off v in = 0v 8 pf 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 a supply current d i cc supply current per v cc = max. v in = 3.0v (3) 750 a input high dc electrical characteristics (over the operating range, t a = C40c to +85c, v cc = 3.3v 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 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 off off current v cc = 0, v out = 3 to 3.6v 10 a v ik clamp diode voltage v cc = min., i in = C18ma C1.2 v r on switch on resistance (3) v cc = min., v in = 0.0v, i on = 48ma or 60ma 5 8 w v cc = min., v in = 2.4v, i on = 15ma 10 17 notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device. 2. typical values are at v cc = 3.3v, +25c ambient. 3. per driven input (control inputs only); a and b pins do not contribute to i cc . notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device type. 2. typical values are at v cc = 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.
pi3b3125/pi3b3126 3.3v, hot insertion, 4-bit, 2-port busswitch 4 ps8153d 01/05/00 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3b3125 com. parameters description conditions (1) min. max. units t plh propagation delay (2,3) c l = 50pf t phl ax to bx, bx to ax r l = 500 w 0.25 ns t pzh bus enable time c l = 50pf, t pzl r l = 500 w , 1.0 3.0 ns t phz bus disable time r = 500 w t plz 1.0 4.0 ns pi3b3125 switching characteristics over operating range pi3b3126 switching characteristics over operating range 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. pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com pi3b3125 com. parameters description conditions (1) min. max. units t plh propagation delay (2,3) c l = 50pf t phl ax to bx, bx to ax r l = 500 w 0.25 ns t pzh bus enable time c l = 50pf, t pzl r l = 500 w , 1.0 2.5 ns t phz bus disable time r = 500 w t plz 1.0 4.0 ns r e b m u n t r a pe g a k c a p / n i pe r u t a r e p m e t q 5 2 1 3 b 3 i p) q ( p o s q - 6 1c 5 8 + o t c 0 4 ? w 5 2 1 3 b 3 i p) w ( c i o s - 4 1c 5 8 + o t c 0 4 ? l 5 2 1 3 b 3 i p) l ( p o s s t - 4 1c 5 8 + o t c 0 4 ? q 6 2 1 3 b 3 i p) q ( p o s q - 6 1c 5 8 + o t c 0 4 ? w 6 2 1 3 b 3 i p) w ( c i o s - 4 1c 5 8 + o t c 0 4 ? l 6 2 1 3 b 3 i p) l ( p o s s t - 4 1c 5 8 + o t c 0 4 ? ordering information
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