1 features ? 2 differential channel, 2:1 mux/demux ? pci express ? 2.0 performance, 5.0 gbps ? bi-directional operation ? low bit-to-bit skew, 7ps ? low crosstalk: -38db@2.5ghz ? low off isolation: -25db@2.5ghz ? v dd operating range: 1.5v to 1.8v 0.1v ? esd t olerance: 2kv ? packaging: C 28-contact tqfn (3.5 5.5mm) description pericom semiconductors pi2pcie2212 is a 4 to 2 differential, bi-directional channel multiplexer/demultiplexer switch. due to its low bit-to-bit skew, high channel-to-channel noise isolation and bandwidth, this product is ideal for pci express ? 2.0 signal switching at 5.0gbps. application switch a pci express ? lane output between two pci express lane inputs block diagram pin description (top-side v iew) pi2pcie2212 a0+ a0- a1+ a1- b0+ b0- b1+ b1- c0+ c0- c1+ c1- sel truth table function sel a to b l a to c h gnd sel ao+ b0+ b0- b1+ b1- c1- v dd gnd c0+ c1+ gnd v dd gnd v dd v dd gnd v dd gnd 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 28 27 26 25 11 12 13 14 gnd ao- a1+ a1- gnd v dd c0- v dd v dd pci express? 2.0, 1-lane, 2:1 mux/demux switch w/ single enable ps8971b 02/08/13 13-0023
2 dc electrical characteristics (t a = C40c to +85c, v dd = 1.5v to 1.8v) parameter description test conditions min. typ. (1) max. units v ih input high v oltage control input, sel guaranteed high level 0.65 x v dd - - v v il input low v oltage control input, sel guaranteed low level -0.5 - 0.35 x v dd v ik clamp diode v oltage control input, sel v dd = max., i in = C18ma - -0.7 -1.2 i ih input high current control input, sel v dd = max., v in = v dd - - 5 a i il input low current control input, sel v dd = max., v in = gnd - - 5 v idc dc signal v oltage range, channel i/o (ax, bx, cx) v o /v i > 95%, r l =10k -0.4 2.4 v v o /v i > 80%, r l =50- ohms -0.3 2.0 notes: 1. typical values are at v dd = 1.8v, t a = 25c ambient and maximum loading. storage t emperature ......................................... C65c to +150c supply v oltage to ground potential .................... C0.5v to +2.5v dc input v oltage ................................................. C0.5v to +v dd 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 functional operation of the device at these or any other conditions above those indic ated 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.) power supply characteristics parameters description test conditions min. typ. (1) max. units i cc quiescent power supply current v dd = max., v in = gnd or v dd 200 400 a notes: 1. typical values are at v dd = 1.8v, t a = 25c ambient and maximum loading. dynamic electrical characteristics (2) (t a = -40o to +85oc, v dd = 1.5v to 1.8v) parameter description test conditions min. typ. (1) max. units x talk crosstalk f = 2.5 ghz -38 db o irr off isolation f = 2.5 ghz -25 i loss differential insertion loss f= 2.5 ghz -2.0 bw bandwidth -3db 3.8 ghz v if max signal fre- quency range insertion loss 1.5 db, v in = 0.6vpp, dc = 0v 2.5 insertion loss 1.5 db, v in = 0.6vpp, dc = 0.9v 2.5 insertion loss 3.0 db, v in = 0.6vpp, dc = 0v 4.0 insertion loss 3.0 db, v in = 0.6vpp, dc = 0.9v 4.0 p-1db 1 db compression input signal rl = 50, f = 625mhz, sinewave, dc = 0v 1.2 vpp rl = 50, f = 625mhz, sinewave, dc = 0.45v 2.0 rl = 50, f = 625mhz, sinewave, dc = 0.9v 2.4 notes: 1. typical values are at v dd = 1.8v, t a = 25c ambient and maximum loading. 2. guaranteed by design. ps8971b 02/08/13 pi2pcie2212 pci express ? 2.0, 1-lane 2:1 mux/demux switch w/ single enable 13-0023
3 switching characteristics (t a = -40o to +85oc, v dd = 1.5v to 1.8v) paramenter description min. typ. (1) max. units t pzh , t pzl line enable t ime - sel to a n , b n, c n 0.5 - 8.0 ns t phz , t plz line disable t ime - sel to a n , b n, c n 0.5 - 8.0 t b-b bit-to-bit skew within the same differential pair 15 ps t ch-ch channel-to-channel skew 20 note: 1. typical values are at v dd = 1.8v, t a = 25c ambient and maximum loading. switch positions test switch t plz , t pzl 2 x v dd t phz , t pzh gnd prop delay open pulse generator d. u. t 200-ohm 200-ohm 4pf c l v dd 2 x v dd r t v in v out test circuit for electrical characteristics (1-5) 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. output 1 is for an output with internal conditions such that the output is low except when disabled by the output control. output 2 is for an output with internal conditions such that the output is high except when disabled by the output control. 4. all input impulses are supplied by generators having the following characteristics: prr mhz, z o = 50?, t r 2.5ns, t f 2.5ns. 5. the outputs are measured one at a time with one transition per measurement. switching waveforms voltage waveforms enable and disable times t plz v dd /2 v dd /2 v dd v oh 0v v ol v dd/2 v oh ?0.3v v ol +0.3v v dd/2 t phz t pzl t pzh output output v ol v oh sel ps8971b 02/08/13 pi2pcie2212 pci express ? 2.0, 1-lane 2:1 mux/demux switch w/ single enable 13-0023
4 crosstalk off isolation ps8971b 02/08/13 pi2pcie2212 pci express ? 2.0, 1-lane 2:1 mux/demux switch w/ single enable 13-0023
5 insertion loss + + + + diff. near end xtalk test circuit + + + diff. off isolation test circuit + + diff. insertion loss and return test circuit ps8971b 02/08/13 pi2pcie2212 pci express ? 2.0, 1-lane 2:1 mux/demux switch w/ single enable 13-0023
6 packaging mechanical: 28-pin tqfn (zh) pericom semiconductor corporation ? 1-800-435-2336 ? www .pericom.com ordering information ordering code package code package type PI2PCIE2212ZHE zh pb-free & green, 28-contact tqfn notes: ? thermal characteristics can be found on the company web site at www.pericom.com/packaging/ ? e = pb-free and green ? adding an x suffx = t ape/reel description: 28-contact, very thin quad flat no-lead, tqfn package code: zh28 document control #: pd-2034 revision: c date: 07/11/12 12-0419 all trademarks are property of their respective owners. note: ? for latest package info, please check: http://www.pericom.com/products/packaging/mechanicals.php ps8971b 02/08/13 pi2pcie2212 pci express ? 2.0, 1-lane 2:1 mux/demux switch w/ single enable 13-0023
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