1 ps8979b 09/16/10 features ? designed specifcally to switch lvds signals ? v dd = 3.3v +/-10% ? esd tolerance on video i/o pins is up to 12kv hbm ? -3db bw of 870mhz (typ) ? low xtalk, (-28db typ) ? low and flat on-state resistance (ron = 3ohm, ron(flat) = 0.5ohm, typ) ? low input/output capacitance (con = 6pf, typ) ? packaging (pb-free and green): ? 56 contact tqfn (zfe) ? 42 contact tqfn (zhe) applications ? routes physical layer signals for high bandwidth description pericoms pi3l vd512 is a 5-dif ferential channel l vds mux/ demux used to switch between multiple l vds sources or end points. in a notebook applicat ion where analog video signals are found in both the notebook and the dock, a switch solution is required to switch between the two video port locations. w ith the high bandwidth of 870mhz, the signal integrity will remain strong even through the long fr4 trace between the notebook and the docking station. in addition to high signal performance, the video signals are also protected against high esd with integrated diodes to v dd and gnd that will support up to 12kv of esd hbm protection. block diagram pin description (56zfe, top view) pi3lvd512 3.3v, 5-differential channel lvds switch targeted for 24bit displays 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 56 55 54 53 52 51 50 49 vdd gnd nc gnd nc nc vdd gnd gnd a 0 a 1 vdd nc gnd a 2 a 3 gnd vdd a 4 a 5 gnd a 6 a 7 gnd sel vdd a 8 a 9 gnd 8b 1 9b 1 gnd 8b 2 9b 2 vdd gnd 0b 1 1b 1 0b 2 1b 2 gnd 2b 1 3b 1 2b 2 3b 2 gnd vdd 4b 1 5b 1 4b 2 5b 2 gnd 6b 1 7b 1 6b 2 7b 2 a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 0b1 1b1 0b2 1b2 2b1 3b1 2b2 3b2 4b1 5b1 4b2 5b2 6b1 6b2 7b1 7b2 8b1 9b1 8b2 9b2 sel 10-0185
2 ps8979b 09/16/10 pi3lvd512 3.3v, 5-differential channel lvds switch targeted for 24bit displays pin description (42zhe, top view) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 41 40 39 nc 42 nc vdd 0b 1 19 20 21 nc 18 9b1 8b2 9b2 vdd a 0 a 1 vdd a 2 a 3 vdd a 4 a 5 a 6 a 7 sel vdd a 8 a 9 8b 1 nc 1b 1 0b 2 1b 2 2b 1 3b 1 2b 2 3b 2 vdd 4b 1 5b 1 4b 2 5b 2 6b 1 7b 1 6b 2 7b 2 vdd note: nc pin (5) could be left floating or tied to gnd 10-0185
3 ps8979b 09/16/10 pi3lvd512 3.3v, 5-differential channel lvds switch targeted for 24bit displays storage t emperature....................................C65c to +150c supply v oltage to ground potential...............C0.5v to +4.0v dc input v oltage............................................C0.5v to +5.5v dc output current......................................................120ma power dissipation...........................................................0.5w note: stresses greater than those listed under maximum ra tings 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 input sel input/output an function l nb 1 a n = nb 1 nb 2 high impedance mode h nb 2 a n = nb 2 nb 1 high impedance mode dc electrical characteristics for video switching over operating range (t a = C40c to +85c, v dd = 3.3v 10%) paramenter description test conditions (1) min. typ. (2) max. units v ih input high v oltage guaranteed high level 2 - - v v il input low v oltage guaranteed low level C0.5 - 0.8 v ik clamp diode v oltage v dd = max., i sel = C18ma - C0.7 C1.2 i ih input high current v dd = max., v sel = v dd - - 5 a i il input low current v dd = max., v sel = gnd - - 5 i off power down leakage current v dd = 0v, v a 3.6 - - 5 r on switch on-resistance (3) v dd = min., 0.9v v input 1.6v, i input = C40ma - 2.8 3.5 ? r flat(on) on-resistance flatness (4) v dd = min., v input @ 0v and 1.5v, i input = C40ma - 0.5 - ?r on on-resistance match from center ports to any other port (4) v dd = min., 0.9v v input 1.6v, i input = C40ma - 0.9 2 10-0185
4 ps8979b 09/16/10 pi3lvd512 3.3v, 5-differential channel lvds switch targeted for 24bit displays 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 dd = 3.3v, t a = 25c ambient and maximum loading. dynamic electrical characteristics over the operating range (t a =-40o to +85oc, v dd =3.3v10%, gnd=0v) parameter description test conditions min. typ. (2) max. units x talk crosstalk f = 250mhz, see fig. 2 - -28 - db o irr off isolation f = 250mhz, see fig. 3 - -41 - bw bandwidth C3db see fig. 1 - 880 - 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 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 dd = max., v sel = gnd or v dd - - 500 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 dd = 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. capacitance (t a = 25c, f = 1mhz) parameters (4) description test conditions (1) typ. (2) units c in input capacitance v sel = 0v 2.7 pf c off port a/b capacitance, switch off 2 c on switch capacitance, switch on 6 switching characteristics paramenter description min. typ. (2) max. units t pd propagation delay (2,3) - 0.25 ns t pzh , t pzl line enable t ime - sel to input, output 0.5 - 15 t phz , t plz line disable t ime - sel to input, output 0.5 - 9 t b-b (2) differential bit-to-bit skew - - 15 ps t ch-ch (2) differential channel to channel skew - - 60 10-0185
5 ps8979b 09/16/10 pi3lvd512 3.3v, 5-differential channel lvds switch targeted for 24bit displays test circuit for electrical characteristics (1) notes: 1. c l = load capacitance: includes jig and probe capacitance. 2. r t = t ermination 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 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 dd v in v out 200-ohm 200-ohm 6.0v pulse generator d.u.t pi3lvd512 t r s hp11667a 50-ohm 50-ohm 50-ohm cl = see graph fig 4 hp4396b 10-0185
6 ps8979b 09/16/10 pi3lvd512 3.3v, 5-differential channel lvds switch targeted for 24bit displays figure 2. crosstalk test setup figure 3. off isolation test setup pi3lvd512 t r s hp11667a 50 50 50 hp4396b 100 100 pi3lvd512 t r s hp11667a 50 50 50 hp4396b 100 10-0185
7 ps8979b 09/16/10 pi3lvd512 3.3v, 5-differential channel lvds switch targeted for 24bit displays voltage waveforms propagation delay times switching waveforms voltage waveforms enable and disable times 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 ?0.3v 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. 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 10-0185
8 ps8979b 09/16/10 pi3lvd512 3.3v, 5-differential channel lvds switch targeted for 24bit displays packaging mechanical: 56-pin tqfn (zf) 1 description: 56-contact, thin fine pitch quad flat no-lead (tqfn) package code: zf56 document control #: pd-2024 revision: c date: 05/15/08 08-0208 10-0185
9 ps8979b 09/16/10 pi3lvd512 3.3v, 5-differential channel lvds switch targeted for 24bit displays packaging mechanical: 42 pin tqfn (zh) notes: ? thermal characteristics can be found on the company web site at www.pericom.com/packaging/ ? e = pb-free and green ? adding x suffx = t ape/reel ordering information ordering code package code package description PI3LVD512ZFE zfe pb-free & green, 56-pin tqfn pi3l vd512zhe zhe pb-free and green, 42-pin tqfn 1 description: 42-contact thin fine pitch quad flat no-lead (tqfn) package code: zh (zh42) document control #: pd-2035 revision: c date: 02/17/09 notes: 1. all dimensions are in millimeters, angles in degrees. 2. coplanarity applies to the exposed thermal pad as well as the terminals. 3. refer jedec mo-220 4. recommended land pattern is for reference only. 5. thermal pad soldering area 09-0116 pericom semiconductor corporation ? 1-800-435-2336 ? www .pericom.com 10-0185
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