1 ps8198b 12/10/99 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 nc a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 gnd vcc be b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 pin name description be bus enable input (active low) a0C8 bus a b0C8 bus b gnd ground v cc power product pin configuration 24-pin l,q product pin description function be a0C9 disconnect h hi-z connect l b0C9 truth table (1) note: h = high voltage level l = low voltage level hi-z = high impedance logic block diagram product description pericom?s semiconductor?s pi3c series of logic circuits are produced using the company?s advanced submicron cmos technology, achieving industry leading performance. the pi3c3861 is a 10-bit, 2.5v or 3.3 volt, 2-port bus switch 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 (be) input signal. this device is very userful 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 2.5v or 3.3v switching ? 5v i/o tolerant ? 2.5v supply voltage operation ? permits hot insertion ? available packages: ? 24-pin 150 mil wide plastic qsop (q) ? 24-pin 173 mil wide plastic tssop (l) ? high bandwidth data switching ? hot docking be a9 a0 b9 b0 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3c3861 2.5v/3.3v, high bandwidth, hot insertion, 10-bit, 2-port, busswitch applications
2 ps8198b 12/10/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3c3861 2.5v/3.3v, high bandwidth, hot insertion,10 -bit, 2-port, busswitch 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 C 1.2 v r on switch on resistance (4) v cc = min., v in = 0.0v, i on = 48ma 5 7 w v cc = min., v in = 2.4v, i on = 15ma 8 15 storage temperature .......................................................... ?65c to + 150c ambient temperature with power applied ............................. ?40c to + 85c supply voltage to ground potential (inputs & vcc 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 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 operational sections of this specification is not implied. exposure to absolute maxi- mum rating conditions for extended periods may affect reliability. capacitance (t a = 25c, f = 1 mhz) 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. maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) v
3 ps8198b 12/10/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 pi3c3861 2.5v/3.3v, high bandwidth, hot insertion,10 -bit, 2-port, busswitch 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 @ ttl high 1 6 8 3 c 3 i p . m o c s r e t e m a r a pn o i t p i r c s e ds n o i t i d n o c. n i m. x a ms t i n u t plh t phl y a l e d n o i t a g a p o r p ) 3 , 2 ( x a o t x b , x b o t x a c l r , f p 0 5 = l 0 0 5 = w 5 2 . 0 s n t pzh t pzl e m i t e l b a n e s u b x b r o x a o t e b 5 . 15 . 6 t phz t plz e m i t e l b a s i d s u b x b r o x a o t e b 5 . 15 . 5 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 input 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 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 3.3v 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. a 1 6 8 3 c 3 i p . m o c s r e t e m a r a pn o i t p i r c s e ds n o i t i d n o c. n i m. x a ms t i n u t plh t phl y a l e d n o i t a g a p o r p ) 3 , 2 ( x a o t x b , x b o t x a c l r , f p 0 5 = l 0 0 5 = w 5 2 . 0 s n t pzh t pzl e m i t e l b a n e s u b x b r o x a o t e b 5 . 18 . 9 t phz t plz e m i t e l b a s i d s u b x b r o x a o t e b 5 . 13 . 8 switching characteristics over 2.5v operating range
4 ps8198b 12/10/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi3c3861 2.5v/3.3v, high bandwidth, hot insertion,10 -bit, 2-port, busswitch pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com 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 ps n o i s n e m i d l 1 6 8 3 c 3 i p) l ( p o s s t - 4 2c 5 8 + o t c 0 4 ? q 1 6 8 3 c 3 i p) q ( p o s q - 4 2c 5 8 + o t c 0 4 ? ordering information output voltage vs. input voltage over various supply voltages
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