1 ps8709b 07/22/04 features ? r on is 4? typical ? low bit-to-bit skew: 200ps ? low crosstalk: C27db @ 250mhz ? low current consumption: 20a ? near-zero propagation delay: 250ps ? switching speed: 9ns ? channel on-capacitance: 9.5pf (typical) ? v cc operating range: +3.0v to +3.6v ? esd>2000v . . . human body model ? >500 mhz bandwidth (or data frequency) ? packaging (pb-free & green available): 48-pin, 240-mil wide plastic tssop (a) applications ? routes physical layer signals for high bandwidth digital video description pericom semiconductors pi3dbv series of logic circuits are produced using the companys advanced sub-micron cmos technology, achieving industry leading performance. the PI3DBV40 is a 8- to 4-channel multiplexer/demultiplexer. industry leading advantages include a propagation delay of less than 250ps, resulting from its low channel resistance and i/o capacitance. the device multiplexes differential outputs from a video source to one of two corresponding outputs or switches two inputs to a common display. the switch is bidirectional and offers little or no attenuation of the high-speed signals at the outputs. it is designed for low bit-to-bit skew, high channel-to-channel noise isolation and is compatible with various standards, such as lvds and tmds. block diagram pin description PI3DBV40 3.3v, wide bandwidth, 4-channel, 2:1 mux/demux video switch with single enable 0 i 1 1 i 1 gnd 0 i 2 1 i 2 gnd 2 i 1 3 i 1 gnd 2 i 2 3 i 2 gnd v dd 4 i 1 5 i 1 gnd 4 i 2 5 i 2 gnd 6 i 1 7 i 1 gnd 6 i 2 7 i 2 v dd y 0 gnd y 1 gnd v dd gnd y 2 gnd y 3 gnd v dd gnd nc y 4 gnd y 5 gnd v dd gnd y 6 gnd y 7 sel 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 sel y 7 y 6 y 5 y 4 y 3 y 2 y 1 y 0 1 i 1 0 i 1 1 i 2 0 i 2 3 i 1 2 i 1 3 i 2 2 i 2 5 i 1 4 i 1 5 i 2 4 i 2 7 i 1 6 i 1 7 i 2 6 i 2
2 ps8709b 07/22/04 PI3DBV40 3.3v, wide bandwidth, 4-channel, 2:1 mux/demux video switch with single enable storage temperature....................................C65c to +150c supply voltage to ground potential...............C0.5v to +4.0v dc input voltage............................................C0.5v 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 func - tional 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 extended periods may affect reliability. maximum ratings (above which useful life may be impaired. for user guidelines, not tested.) truth table function sel y n to n i 1 l y n to n i 2 h dc electrical characteristics for video switching over operating range (t a = C40c to +85c, v cc = 3.3v 10%) paramenter description test conditions min. typ. (2) max. units v ih input high voltage guaranteed high level 2 - - v v il input low voltage guaranteed low level C0.5 - 0.8 v ik clamp diode voltage v cc = max., i in = C18ma - C0.7 C1.2 i ih input high current v cc = max., v in = v cc - - 5 a i il input low current v cc = max., v in = gnd - - 5 i off power down leakage current vcc = 0v, v y = 0v, v i 3.6 - - 5 r on switch on-resistance (3) v cc = min., 1.5v v in v cc , i in = C40ma - 4 8 ? r flat(on) on-resistance flatness (4) v cc = min., vin @ 1.5v and v cc , i in = C40ma - 1 - ?r on on-resistance match from center ports to any other port (4) v cc = min., 1.5v v in v cc , i in = C40ma - 0.9 2
3 ps8709b 07/22/04 PI3DBV40 3.3v, wide bandwidth, 4-channel, 2:1 mux/demux video switch with single enable 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 = 3.3v, t a = 25c ambient and maximum loading. dynamic electrical characteristics over the operating range (t a =-40o to +85oc, v cc =3.3v10%, gnd=0v) parameter description test conditions min. typ. (2) max. units x talk crosstalk f = 250mhz, see fig. 2 - -27 - db o irr off isolation f = 250mhz, see fig. 3 - -32 - bw bandwidth C3db see fig. 1, fig. 4 - 500 - mhz notes: 1. for max. or min. conditions, use appropriate value specifed under electrical characteristics for the applicable device type. 2. guaranteed by design. 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 10pf 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 interactions with the load on the driven side. 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 - - 800 a 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 = 3.3v, t a = 25c ambient and maximum loading. 3. measured by the voltage drop between a and b pins 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. 5. measured on worst case corner pin. capacitance ( t a = 25c, f = 1mhz) parameters (4) description test conditions typ. max. units c in input capacitance v in = 0v 3.1 3.6 pf c off port i capacitance, switch off 2.8 6.0 c on switch capacitance, switch on 9.5 (5) 10.9 switching characteristics paramenter description min. typ. (2) max. units t pd propagation delay (2,3) - 0.25 ns t pzh , t pzl line enable time - sel to y n , i n 0.5 - 15 t phz , t plz line disable time - sel to y n , i n 0.5 - 9 t sk(o) output skew between center port (y4 to y5) to any other port (2) - 0.1 0.2 t sk(p) skew between opposite transitions of the same output (t phl - t plh ) (2) - 0.1 0.2
4 ps8709b 07/22/04 PI3DBV40 3.3v, wide bandwidth, 4-channel, 2:1 mux/demux video switch with single enable test circuit for electrical characteristics (1) notes: 1. c l = load capacitance: includes jig and probe capacitance. 2. r t = termination resistance: should be equal to z out of the pulse generator 3. all input impulses are supplied by generators having the following characteristics: f = 10 mhz, z o = 50?, t r 2.5ns, t f 2.5ns. 4. the outputs are measured one at a time with one transition per measurement. test circuit for dynamic electrical characteristics PI3DBV40 t r s hp1 1667a 50-ohm 50-ohm 50-ohm cl = see graph fig 4 hp4396b switch positions test switch t plz , t pzl (output on i-side) 6.0v t phz , t pzh (output on i-side) gnd prop delay open figure 1. bandwidth -3db testing r t 10pf c l v cc v in v ou t 200-ohm 200-ohm 6.0v pulse generator d.u.t
5 ps8709b 07/22/04 PI3DBV40 3.3v, wide bandwidth, 4-channel, 2:1 mux/demux video switch with single enable figure 2. crosstalk test setup figure 3. off isolation tets setup PI3DBV40 t r s hp1 1667a 50 50 50 hp4396b 100 100 PI3DBV40 t r s hp1 1667a 50 50 50 hp4396b 100
6 ps8709b 07/22/04 PI3DBV40 3.3v, wide bandwidth, 4-channel, 2:1 mux/demux video switch with single enable figure 4. 3dvb40 -3db bandwidth versus cl 0 100 200 300 400 500 600 700 0 10 20 3 0 40 5 0 6 0 cl in pf bw in mhz
7 ps8709b 07/22/04 PI3DBV40 3.3v, wide bandwidth, 4-channel, 2:1 mux/demux video switch with single enable voltage waveforms propagation delay times switching waveforms output skew - t sk(o) pulse skew - t sk(p) voltage waveforms enable and disable times data in data out at channel x data out at channel y t plhx t phlx 3.5v 2.5v 2.5v 2.5v i t sk(o) = i t plhy C t plhx i or i t phly C t phlx i t sk(o) t plhy t phly v oh v ol v ol v oh 1.5v input output t plh t sk(p) = i t phl C t plh i t phl 3.5v 2.5v 2.5v v ol v oh 1.5v t plz 1.25v 1.25v 2.5v v oh 0v v ol v dd/2 v dd/2 t phz t pzl t pzh output output v ol +0.3v v oh C0.3v v ol v oh sel applications information logic inputs the logic control inputs can be driven up to +3.6v regardless of the supply voltage. for example, given a +3.3v supply, the output enables or select pins may be driven low to 0v and high to 3.6v. driving in rail-to-rail? minimizes power consumption. power-supply sequencing proper power-supply sequencing is advised for all cmos devices. it is recommended to always apply v cc before applying signals to the input/output or control pins. rail-to-rail is a registered trademark of nippon motorola, ltd input t plh 2.5v 2.5v 2.5v 2.5v t phl 3.5v 1.5v output v oh v ol
8 ps8709b 07/22/04 PI3DBV40 3.3v, wide bandwidth, 4-channel, 2:1 mux/demux video switch with single enable packaging mechanical: 48-pin tssop (a) .236 .244 .488 .496 .002 .006 seating plane .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 denotes dimensions in millimeters .018 .030 0.45 0.75 .047 1.20 max bsc notes: 1. thermal characteristics can be found on the company web site at www .pericom.com/packaging/. ordering information ordering code package code package description PI3DBV40a a 48-pin 240 mil wide plastic tssop PI3DBV40ae a pb-free, 48-pin 240 mil wide plastic tssop pericom semiconductor corporation ? 1-800-435-2336 ? www.pericom.com
|
