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general description the MAX4886 high-speed analog switch is ideal for hdmi/dvi switching applications, permitting 2:1 or 1:2 switching. the MAX4886 contains four differential pairs of 1:2 or 2:1 switches for rgb and clocking signals. the MAX4886 connects either one monitor to one of two digital video signals, or one hdmi/dvi source to one of two loads (sink). the MAX4886 set of differential switches is based on an nfet architecture with internal charge pump for gate overdrive. this advanced architecture results in an extremely low capacitance and on-resistance needed for the excellent return loss requirements for digital switching. an efficient internal charge-pump design offers very low quiescent current for power-sensitive notebook designs. the MAX4886 features 8 (typ) on-resistance and 2.5pf on-capacitance switches for routing rgb and clk video signals. the MAX4886 is a high-frequency companion device to the max4929. these two devices combined perform the full 2:1 hdmi/dvi switching function. the MAX4886 is available in a space-saving, 42-pin, 3.5mm x 9.0mm tqfn package and operates over the extended -40? to +85? temperature range. applications hdtv monitors/receivers video projectors notebook computers digital hdtv switch boxes/tuners multimedia audio/video switchers servers/routers with dvi interfaces digital video recorders lvds switching 1000 base-bx, switching features ? single +3.0v to +3.6v power supply ? low on-resistance (r on ): 8 (typ) ? low on-capacitance (c on ): 2.5pf (typ) ? low skew: 20ps (typ) ? 700a low supply current ? 2.6ghz (typ) ultra-high bandwidth ? 0.6db (typ) ultra-low insertion loss ? high-frequency companion device to max4929 ? use MAX4886 and max4929 to form a complete hdmi/dvi 2:1 switch ? 42-pin, 3.5mm x 9.0mm, space-saving tqfn MAX4886 quad, high-speed hdmi/dvi 2:1 digital video switch ________________________________________________________________ maxim integrated products 1 19-0807; rev 0; 4/07 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information part temp range pin- package pkg code MAX4886eto+ -40c to +85c 42 tqfn-ep* t42359om-1 + denotes a lead-free package. * ep = exposed paddle. pin configuration appears at end of data sheet. eye diagram (v dd = 3.3v, f = 2.6ghz 600mv p-p prbs signal+) * prbs = psuedorandom bit sequence ui = 606ps eye diagram
MAX4886 quad, high-speed hdmi/dvi 2:1 digital video switch 2 _______________________________________________________________________________________ absolute maximum ratings stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. (all voltages referenced to gnd.) v dd ...........................................................................-0.3v to +4v sel (note 1) ...............................................-0.3v to (v dd + 0.3v) com_, nc_, no_ .......................................-0.3v to (v dd + 0.3v) continuous current through any switch .......................?20ma peak current through any switches (pulsed at 1ms, 10% duty cycle).................................?40ma continuous power dissipation (t a = +70?) 42-pin thin qfn-ep (derate 35.7mw/? above +70?).....................................................................2857.1mw operating temperature range ...........................-40? to +85? storage temperature range .............................-65? to +150? junction temperature .................................................... +150? lead temperature (soldering, 10s) .................................+300? electrical characteristics (v dd = +3.0v to +3.6v, t a = t min to t max . typical values are at v dd = +3.3v, t a = +25?, unless otherwise noted.) (note 2) parameter s ymbol condition s min typ max unit s supply voltage range v dd 3.0 3.6 v quiescent supply current i dd +3v v dd +3.6v; sel = 0v or v dd 600 1100 ? analog s witch t a = +25? 8 11 v dd = +3v, 0v v com_ v dd , i com_ = -40ma t a = t min to t max 15 t a = +25? 8 11 on-resistance (note 3) r on v dd = +3v, i com_ = -40ma, 0 v com_ 1.5v t a = t min to t max 15 t a = +25? 0.28 0.40 v dd = +3v, 1.5v v com_ v dd , i com_ = -40ma t a = t min to t max 0.8 t a = +25? 0.28 0.40 on-resistance matching (notes 3, 4) r on v dd = +3v, 0 v com_ 1.5v, i com_ = -40ma t a = t min to t max 0.8 t a = +25? 0.02 0.60 v dd = +3v, i com_ = -40ma, 1.5v < v com_ < v dd t a = t min to t max 1 t a = +25? 0.02 0.60 on-resistance flatness (note 3) r flat ( on ) v dd = +3v, i com_ = -40ma, 0 v com_ 1.5v t a = t min to t max 1 lea k age current i l v dd = +3.6v, v com_ = +0.3v, +3.3v, v nc_ or v no_ = +3.3v, 0.3v -1 +1 ? s witch dynamic off-capacitance c off f = 1mhz, v com_ = v nc_ or v no_ 1.5 pf note 1: signal exceeding v dd or gnd are clamped by internal diodes. limit forward-diode current to maximum current rating.
MAX4886 quad, high-speed hdmi/dvi 2:1 digital video switch _______________________________________________________________________________________ 3 electrical characteristics (continued) (v dd = +3.0v to +3.6v, t a = t min to t max . typical values are at v dd = +3.3v, t a = +25?, unless otherwise noted.) (note 2) note 2: maximum and minimum limits over temperature are guaranteed by design and characterization. device is production tested at t a = +25?. note 3: negative current is going into com_ and out of no_ or nc_. note 4: guaranteed by design. parameter s ymbol condition s min typ max unit s on-capacitance c on f = 1mhz, v com_ = v nc_ or v no_ 2.5 pf propagation delay t pd1 , t pd2 r s = r l = 50 (figure 2) 100 ps output s k ew between ports t skew1 s k ew between any two ports, r s = r l = 50 (figure 3) 20 ps s k ew between same ports t skew2 r s = r l = 50 , s k ew between any two ports (figure 3) 20 ps s witch ac performance on-channel -3db bandwidth bw r s = r l = 50 (figure 4) 2.6 ghz insertion loss i los r s = r l = 50 , f = 50m hz ( fi gur e 4) 0.6 db off-isolation v iso r s = r l = 50 , single-ended, f = 50mhz (figure 4) -58 db crosstal k v ct1 crosstal k between any two switches, r s = r l = 50 , f = 50mhz (figure 4) -49 db logic input s ( s el) input-low voltage v il v dd = +3.0v 0.8 v input-high voltage v ih v dd = +3.6v 2.0 v input-voltage hysteresis v hyst 100 mv input lea k age current i leak v dd = +3.6v, v com_ or v nc_ or v no_ = 0v -1 +1 ?
MAX4886 quad, high-speed hdmi/dvi 2:1 digital video switch 4 _______________________________________________________________________________________ typical operating characteristics (t a = +25?, unless otherwise noted.) 1 10 1000 100 10,000 frequency response frequency (mhz) on-loss (db) 0 -8 -1 -2 -3 -4 -5 -6 -7 MAX4886 toc05 leakage current vs. temperature temperature ( c) leakage current (na) MAX4886 toc04 -40 -15 10 35 60 85 0.1 1 10 on-resistance vs. v com_ v com_ (v) on-resistance ( ) MAX4886 toc01 0 0.6 1.2 1.8 2.4 3.0 3.6 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 v dd = 3.6v v dd = 3v v dd = 3.3v on-resistance vs. temperature v com_ (v) on-resistance ( ) MAX4886 toc02 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3 0 1 2 3 4 5 6 7 8 9 10 t a = -40 c t a = +85 c t a = +25 c supply current vs. supply voltage v dd (v) supply current ( a) MAX4886 toc03 3.0 3.1 3.2 3.3 3.4 3.5 3.6 400 450 500 550 600 650 700 t a = +25 c t a = +85 c t a = -40 c
MAX4886 quad, high-speed hdmi/dvi 2:1 digital video switch _______________________________________________________________________________________ 5 pin description pin name function 1, 4, 10, 14, 17, 19, 21, 39, 41 gnd ground 5, 8, 13, 18, 20, 30, 40, 42 v dd power-supply voltage input. bypass v dd to gnd with a 0.1f or larger ceramic capacitor. 2 com1+ data signal inputs/outputs 3 com1- data signal inputs/outputs 6 com2+ data signal inputs/outputs 7 com2- data signal inputs/outputs 9 sel select input. logic input for switch connection (see table 1). 11 com3+ data signal inputs/outputs 12 com3- data signal inputs/outputs 15 com4+ data signal inputs/outputs 16 com4- data signal inputs/outputs 22 no4- differential pair. data signal inputs/outputs. 23 no4+ differential pair. data signal inputs/outputs. 24 no3- differential pair. data signal inputs/outputs. 25 no3+ differential pair. data signal inputs/outputs. 26 nc4- differential pair. data signal inputs/outputs. 27 nc4+ differential pair. data signal inputs/outputs. 28 nc3- differential pair. data signal inputs/outputs. 29 nc3+ differential pair. data signal inputs/outputs. 31 no2- differential pair. data signal inputs/outputs. 32 no2+ differential pair. data signal inputs/outputs. 33 no1- differential pair. data signal inputs/outputs. 34 no1+ differential pair. data signal inputs/outputs. 35 nc2- differential pair. data signal inputs/outputs. 36 nc2+ differential pair. data signal inputs/outputs. 37 nc1- differential pair. data signal inputs/outputs. 38 nc1+ differential pair. data signal inputs/outputs. ep ep exposed paddle. connect ep to gnd.
MAX4886 detailed description the MAX4886 high-speed analog switch is ideal for hdmi/dvi switching applications, permitting 2:1 or 1:2 switching. the MAX4886 contains four differential pairs for hdmi or dvi switching. the MAX4886 connects either one monitor to one of two digital video signals or one hdmi/dvi output to one of two connectors or loads. the MAX4886 differential switches are based on an nfet architecture with an internal charge pump for gate overdrive. this advanced architecture results in an extremely low capacitance and on-resistance needed for an excellent returns loss. the MAX4886 features an 8 (typ) on-resistance and 2.5pf on-capacitance switches for routing rgb and clk video signals. the MAX4886 switches are identical, and any of the switches can be used to route rgb and clk video signals. the device will also be useful in other high-speed switching applications such as lvds and lvpecl. analog-signal levels signal inputs over the full voltage range (0v to v dd ) are passed through the switch with minimal change in on- resistance (see the typical operating characteristics section). the switches are bidirectional. therefore, com_, nc_, and no_ can be either inputs or outputs. logic inputs (sel) the MAX4886 has a logic input that controls the switch on/off function. use sel to switch com_ to no_ or com_ to nc_. table 1 and the functional diagram illustrate the MAX4886 truth table. applications information power-supply bypassing and sequencing proper power-supply sequencing is recommended for all cmos devices. do not exceed the absolute maximum ratings, because stresses beyond the listed ratings can cause permanent damage to the device. always sequence v dd on first, followed by the switch inputs and the logic inputs. bypass at least one v dd input to ground with a 0.1? capacitor as close to the device as possible. use the smallest physical size pos- sible for optimal performance. it is also recommended to bypass more than one v dd input. a good strategy is to bypass one v dd input with a 0.1? capacitor and at least a second v dd input with a 1nf to 10nf capacitor. (use 0603 or smaller physical size ceramic capacitor). pc board (pcb) layout high-speed switches such as the MAX4886 require proper pcb layout for optimum performance. ensure that impedance-controlled pcb traces for high-speed signals are matched in length, and as short as possi- ble. connect the MAX4886 exposed paddle to a solid ground plane. quad, high-speed hdmi/dvi 2:1 digital video switch 6 _______________________________________________________________________________________ nc1+ nc1+ no1+ no1- nc2+ nc2- no2+ no2- no4+ no4- nc4+ nc4- no3+ no3- nc3+ nc3- com1+ com1- com2+ com2- com3+ com3- com4+ com4- MAX4886 sel v dd gnd sel function 0 com_ to nc_ 1 com_ to no_ table 1. switch truth table functional diagram
MAX4886 quad, high-speed hdmi/dvi 2:1 digital video switch _______________________________________________________________________________________ 7 logic input r l com_ gnd sel c l includes fixture and stray capacitance. v out = v n_ ( r l ) r l + r on v n_ nc_ or no_ v dd c l v dd v out MAX4886 figure 1. switching time 50 trace com1+ nc1+ 50 trace com1- nc1- in+ in- out+ out- v dd t pd1 t pd2 sel gnd +3.3v com1+ com1- nc1+ nc1- in+ in- out+ out- 50 trace 50 trace MAX4886 figure 2. propagation delay timing circuits/timing diagrams
MAX4886 additional applications information in a typical application (see figure 5), the MAX4886 and max4929 are used to route the tmds signals and low-frequency signals between two hdmi inputs. in another application (see figure 6), the MAX4886 is used in a notebook to route high-frequency dvi port on the computer or to the connector on the docking sta- tion. the MAX4886 routes four differential signals (rgb and clk) either to the dvi connector or to the docking station port. the switch is inherently bilateral and may be used as a 2:1 or 1:2 mux without penalties. quad, high-speed hdmi/dvi 2:1 digital video switch 8 _______________________________________________________________________________________ timing circuits/timing diagrams (continued) 50 trace com1+ nc1+ 50 trace com1- nc1- in+ in- out+ out- v dd sel v dd +3.3v com1+ com1- nc1+ nc1- in+ in- out+ out- 50 trace 50 trace MAX4886 t plh2 t plh1 50% 50% t plh2 t plh1 50% 50% figure 3. skew measurements chip information process: bicmos connect exposed paddle to gnd.
MAX4886 quad, high-speed hdmi/dvi 2:1 digital video switch _______________________________________________________________________________________ 9 timing circuits/timing diagrams (continued) r15 49.9 network analyzer network analyzer network analyzer network analyzer 3db bandwidth/insertion loss 50 trace crosstalk 50 trace off-isolation 50 trace 50 trace com1+ 2 com2+ 6 com2- 7 com3+ 11 nc3+ 29 nc2- 35 nc2+ 36 nc1+ 38 50 trace network analyzer network analyzer 50 trace r14 49.9 r13 49.9 MAX4886 figure 4. on-loss, off-isolation, and crosstalk MAX4886 max4929 hdmi1 tmds low-frequency signals 5v (hpir), hpd, ddc/scl, ddc/sda nc_ r g b ck hpir hpd sel com_+ tmds r x mcu edid eeprom com_- nc_ 8 8 tmds hdmi2 figure 5. tv/monitor application typical application diagrams
MAX4886 quad, high-speed hdmi/dvi 2:1 digital video switch 10 ______________________________________________________________________________________ com1+ com1- com2+ com2- com3+ com3- com4+ com4- sel_dock no4+ no4- no3+ no3- no2+ no2- no1+ no1- nc1+ nci- nc2+ nc2- nc3+ nc3- nc4+ nc4- sel dvi connector monitor dvi signals docking station MAX4886 figure 6. notebook application typical application diagrams (continued) top view MAX4886 tqfn 18 19 20 21 v dd gnd v dd gnd 42 + 41 40 39 v dd gnd v dd gnd 1234567891011121314151617 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 com3- v dd gnd com4+ com4- gnd com3+ gnd sel v dd com2- com2+ v dd gnd com1- com1+ gnd nc4+ nc4- no3+ no3- no4+ no4- nc3- nc3+ v dd no2- no2+ no1- no1+ nc2- nc2+ nc1- nc1+ *connect exposed paddle to ground. *ep pin configuration
MAX4886 quad, high-speed hdmi/dvi 2:1 digital video switch ______________________________________________________________________________________ 11 package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) 42l thin qfn.eps
MAX4886 quad, high-speed hdmi/dvi 2:1 digital video switch maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2007 maxim integrated products is a registered trademark of maxim integrated products, inc. boblet package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)

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