1 ps8153b 12/10/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012 12345678901 2 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3c3125 PI3C3126 2.5v/3.3v, high bandwidth, hot insertion,4-bit, 2-port bus switch with individual enables product description pericom semiconductor?s pi3c series of logic circuits are produced using the company?s advanced sub micron cmos technology, achieving industry leading speed grades. the pi3c3125a and PI3C3126a are 2.5v or 3.3 volt, 4-bit bus switches designed with four individual 5 w 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 pi3c3125 device has active low enables, and the PI3C3126a has active high enables. it is very useful in switching signals that have high bandwidth (>400 mhz). product features ? near zero propagation delay ?5 w switches connect inputs to outputs ? high bandwidth (>400 mhz) ? rail-to-rail, or 2.5v or 3.3v switching ? 5v i/o tolerant ? 2.5v supply voltage operation ? permits hot insertion ? 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) applications ? high bandwidth data switching ? hot docking pi3c3125 logic block diagram PI3C3126 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
2 ps8153b 12/10/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3c3125/PI3C3126 2.5v/3.3v, high bandwidth, hot insertion, 4-bit, 2-port bus switch pi3c3125 14-pin configuration PI3C3126 14-pin configuration pi3c3125 16-pin configuration PI3C3126 16-pin configuration pin description pin name description ben switch enable (pi3c3125) ben switch enable (PI3C3126) a3-a0 bus a b3-b0 bus b v cc power gnd ground pi3c3125 PI3C3126 ben ben an bn v cc function x* x hi-z hi-z gnd disconnect h l hi-z hi-z v cc disconnect lhbnanv cc connect truth table (1) note: 1. h = high voltage level, l = low voltage level hi-z = high impedance, x = don?t care * a pull-up resistor should be provided for power-up protection. maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) 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 storage temperature............................................................ ?65c to +150c ambient temperature with power applied ............................. ?40c to +85c supply voltage to ground potential (inputs & v cc only) ...... ?0.5v to +4.6v supply voltage to ground potential (outputs & d/o only) .... ?0.5v to +4.6v dc input voltage ..................................................................... ?0.5v to +5.5v dc output current ............................................................................... 120ma power dissipation ................................................................................... 0.5w 14-pin l,w 14-pin l,w 16-pin q 16-pin q
3 ps8153b 12/10/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3c3125/PI3C3126 2.5v/3.3v, high bandwidth, hot insertion, 4-bit, 2-port bus switch dc electrical characteristics (over 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 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 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 v ik clamp diode voltage v cc = min., i in = C18ma C0.73 C1.2 v r on switch on resistance (4) v cc = min., v in = 0.0v, i on = 48ma or 60ma 5 7 w v cc = min., v in = 2.4v, i on = 15ma 8 15 parameters (5) description test conditions typ. units c in input capacitance v in = 0v 3.5 c off a/b capacitance, switch off v in = 0v 5.0 pf c on a/b capacitance, switch on v in = 0v 10.0 notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device type. 2. typical values are at v cc = 3.3v, 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. v capacitance (t a = 25c, f = 1 mhz) 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 260 500 supply current d i cc supply current per v cc = max. v in = 3.0v (3) 750 input high 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 input only); a and b pins do not contribute to d i cc . a
4 ps8153b 12/10/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3c3125/PI3C3126 2.5v/3.3v, high bandwidth, hot insertion, 4-bit, 2-port bus switch 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. pi3c3125/PI3C3126 com. parameters description conditions (1) min. max. units t plh propagation delay (2,3) c l = 50 pf, 0.25 t phl a to b, b to a r l = 500 w t pzh bus enable time 1.5 9.8 ns t pzl c l = 50 pf, t phz bus disable time r l = 500 w, 1.5 8.3 t plz r = 500 w pi3c3125/PI3C3126 com. parameters description conditions (1) min. max. units t plh propagation delay (2,3) c l = 50 pf, 0.25 t phl a to b, b to a r l = 500 w t pzh bus enable time 1.5 6.5 ns t pzl c l = 50 pf, t phz bus disable time r l = 500 w, 1.5 5.5 t plz r = 500 w pi3c3125/PI3C3126 switching characteristics over 2.5v operating range pi3c3125/PI3C3126 switching characteristics over 3.3v operating range
5 ps8153b 12/10/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3c3125/PI3C3126 2.5v/3.3v, high bandwidth, hot insertion, 4-bit, 2-port bus switch 4.0 2.0 0.0 0.0 1.0 2.0 3.0 4.0 5.0 v out , (v) v in , (v) v cc = 3.3v 3.1v 2.9v 2.7v 2.5v 2.3v 3.6v 3.8v 3.4v 3.2v 3.0v 2.8v output voltage vs. input voltage over various supply voltages t r a pe g a k c a p - n i pe r u t a r e p m e t l 5 2 1 3 c 3 i p) l ( p o s s t - 4 1c o 5 8 + o t c o 0 4 ? w 5 2 1 3 c 3 i p) w ( c i o s - 4 1c o 5 8 + o t c o 0 4 ? q 5 2 1 3 c 3 i p) q ( p o s q - 6 1c o 5 8 + o t c o 0 4 ? l 6 2 1 3 c 3 i p) l ( p o s s t - 4 1c o 5 8 + o t c o 0 4 ? w 6 2 1 3 c 3 i p) w ( c i o s - 4 1c o 5 8 + o t c o 0 4 ? q 6 2 1 3 c 3 i p) q ( p o s q - 6 1c o 5 8 + o t c o 0 4 ? ordering information pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com output voltage vs. input voltage over various supply voltages
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