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1 ? fn6410.0 ISL54208 low voltage, dual spdt, usb/cvbs/ audio switches, with negative signal capability the intersil ISL54208 dual spdt (single pole/double throw) switches combine low distortion audio/video and accurate usb 2.0 high speed (480mbps) data signal switching in the same low voltage device. when operated with a 2.7v to 3.6v single supply these analog switches allow audio/video signal swings below-ground, allowing the use of a common usb and audio/video connector in digital cameras, camcorders and other portable battery powered personal media player devices. the ISL54208 logic control pins are 1.8v logic compatible which allows control via a standard controller. with a vdd voltage in the range of 2.7v to 3.6v the in pin voltage can exceed the vdd rail allowing for the usb 5v vbus voltage from a computer to directly drive the in pin to switch between the audio/video and usb signal sources in the portable device. the part has an enable control pin to open all the switches and put the part in a low power state. the ISL54208 is available in a small 10 ld 2.1mmx1.6mm ultra-thin tqfn package and a 10 ld 3mmx3mm tdfn package. it operates over a te mperature range of -40 to +85c. related literature ? technical brief tb363 ?guidelines for handling and processing moisture sensit ive surface mount devices (smds)? ? application note an557 ?recommended test procedures for analog switches? features ? high speed (480mbps) signaling capability per usb 2.0 ? low distortion negative signal capability ? control pin to open all switches and enter low power state ? low distortion mono audio signal - thd+n at 20mw into 32 load . . . . . . . . . . . . . <0.1% ? low distortion color video signal - differential gain . . . . . . . . . . . . . . . . . . . . . . . . . . 0.28% - differential phase. . . . . . . . . . . . . . . . . . . . . . . . . . 0.04 ? cross-talk ncx channels (4mhz) . . . . . . . . . . . . . . -78db ? single supply operation (v dd ) . . . . . . . . . . . . 1.8v to 5.5v ? -3db bandwidth usb nox switches . . . . . . . . . . . 630mhz ? available in tqfn and tdfn packages ? pb-free plus anneal (rohs compliant) ? compliant with usb 2.0 short circuit requirements without additional external components applications ? digital camera and camcorders ? video mp3 and other personal media players ? cellular/mobile phones ?pda?s ? audio/video/usb switching application block diagram logic circuitry ISL54208 usb transceiver high-speed audio usb and audio/video jack com1 com2 in gnd no1 no2 nc1 nc2 vdd ctrl controller 4m 50k 50k ntsc or pal video d+ d- vbus data sheet december 18, 2006 caution: these devices are sensitive to electrosta tic discharge; follow proper ic handling procedures. 1-888-intersil or 1-888-468-3774 | intersil (and design) is a registered trademark of intersil americas inc. copyright intersil americas inc. 2006. all rights reserved all other trademarks mentioned are the property of their respective owners.
2 fn6410.0 december 18, 2006 pinouts (note 1) ISL54208 (10 ld tqfn) top view ISL54208 (10 ld tdfn) top view note: 1. ISL54208 switches shown for in = logic ?0? and ctrl = logic ?1?. 1 3 4 no1 com 1 nc1 in ctrl 2 10 5 7 8 no2 com 2 nc2 gnd 9 6 vdd logic control 4m 50k 50k 2 4 5 no1 com 1 nc1 in 3 7 8 no2 com 2 nc2 9 6 vdd logic control 50k 50k 1 gnd 10 4m ctrl truth table ISL54208 in ctrl nc1, nc2 no1, no2 00offoff 0 1 on off 1xoffon in: logic ?0? when 0.5v, logic ?1? when 1.4v with 2.7v to 3.6v supply. ctrl: logic ?0? when 0.5v or floating, logic ?1? when 1.4v with 2.7v to 3.6v supply. pin descriptions ISL54208 pin no. name function 1 vdd power supply 2 in digital control input 3 com1 voice/video and usb common pin 4 com2 voice/video and usb common pin 5 gnd ground connection 6 nc2 audio or video input 7 nc1 audio or video input 8 no2 usb differential input 9 no1 usb differential input 10 ctrl digital control input (audio/vidio enable) ordering information part number (note) part marking temp. range (c) package (pb-free) pkg. dwg. # ISL54208iruz-t fr -40 to +85 10 ld 2.1x1.6mm tqfn tape and reel l10.2.1x1.6a ISL54208irz-t 4208 -40 to +85 10 ld 3mmx3mm tdfn tape and reel l10.3x3a ISL54208irz 4208 -40 to +85 10 ld 3mmx3mm tdfn l10.3x3a note: intersil pb-free plus anneal products employ special pb-free material sets ; molding compounds/die attach materials and 100 % matte tin plate or nipdau termination finish, which are rohs compliant and comp atible with both snpb and pb-free soldering operations. intersil pb-free products are msl classified at pb-free peak reflow temperatures that meet or exceed the pb-free requirements of ipc/jedec j std-020. ISL54208
3 fn6410.0 december 18, 2006 absolute maximum ratings thermal information vdd to gnd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 6.0v input voltages ncx, nox(note 2) . . . . . . . . . . . . . . . . . . . . -2v to ((v dd ) + 0.3v) in (note 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2v to 5.5v ctrl (note 2) . . . . . . . . . . . . . . . . . . . . . . -0.3 to ((v dd ) + 0.3v) output voltages comx (note 2) . . . . . . . . . . . . . . . . . . . . . . -2v to ((v dd ) + 0.3v) continuous current (ncx, comx) . . . . . . . . . . . . . . . . . . . 150ma peak current (ncx, comx) (pulsed 1ms, 10% duty cycle, max). . . . . . . . . . . . . . . . 300ma continuous current (nox) . . . . . . . . . . . . . . . . . . . . . . . . . . 40ma peak current (nox) (pulsed 1ms, 10% duty cycle, max) . . . . . . . . . . . . . . . . 100ma esd rating: hbm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >7kv mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >400v cdm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>1.4kv thermal resistance (typical, note 3) ja (c/w) 10 ld tqfn package . . . . . . . . . . . . . . . . . . . . . . . 130 10 ld 3x3 tdfn package. . . . . . . . . . . . . . . . . . . . . 110 maximum junction temperature (plastic package) . . . . . . . +150c maximum storage temperature range. . . . . . . . . . . . -65c to +150c operating conditions temperature range ISL54208iruz and ISL54208irz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40c to +85c caution: stresses above those listed in ?absolute maximum rati ngs? may cause permanent damage to the device. this is a stress o nly rating and operation of the device at these or any other cond itions above those indicated in the operational se ctions of this specif ication is not implied. notes: 2. signals on nox, ncx, comx, ctrl, in exceeding v dd or gnd by specified amount are clamped. limit current to maximum current ratings. 3. ja is measured with the component mounted on a high effective therma l conductivity test board in free air. see tech brief tb379 f or details. electrical specifications - 2.7v to 3.6v supply test conditions: v dd = +3.3v, gnd = 0v, v inh = 1.4v, v inl = 0.5v, v ctrlh = 1.4v, v ctrll = 0.5v, (notes 4, 6), unless otherwise specified. parameter test conditions temp (c) (note 5) min typ (note 5) max units analog switch characteristics audio/video switches (nc1, nc2) analog signal range, v analog v dd = 3.0v, in = 0.5v, ctrl = 1.4v full -1.5 - 1.5 v on resistance, r on v dd = 3.0v, in = 0.5v, ctrl = 1.4v, i comx = 100ma, v ncx = -0.85v to 0.85v, (see figure 3) 25 - 2.65 4 full - - 5.5 r on matching between channels, r on v dd = 3.0v, in = 0.5v, ctrl = 1.4v, i comx = 100ma, v ncx = voltage at max r on over signal range of -0.85v to 0.85v, (note 8) 25 - 0.02 0.13 full - - 0.16 r on flatness, r flat(on) v dd = 3.0v, in = 0.5v, ctrl = 1.4v, i comx = 100ma, v ncx = -0.85v to 0.85v, (note 7) 25 - 0.03 0.05 full - - 0.07 discharge pull-down resistance, r nc1 , r nc2 v dd = 3.6v, in = 0v, ctrl = 3.6v, v com- or v com+ = -0.85v, 0.85v, v ncx = -0.85v, 0.85v, v nox = floating, measure curre nt through the discharge pull-down resistor and calculate resistance value. 25 - 50 - k usb switches (no1, no2) analog signal range, v analog v dd = 3.6v, in = 1.4v, ctrl = 1.4v full 0 - v dd v on resistance, r on v dd = 3.6v, in = 1.4v, ctrl = 1.4v, i comx = 40ma, v nox = 0v to 400mv (see figure 4) 25 - 4.6 5 full - - 6.5 r on matching between channels, r on v dd = 3.6v, in = 1.4v, ctrl = 1.4v, i comx = 40ma, v nox = voltage at max r on , (note 8) 25 - 0.06 0.5 full - - 0.55 r on flatness, r flat(on) v dd = 3.6v, in = 1.4v, ctrl = 1.4v, i comx = 40ma, v nox = 0v to 400mv, (note 7) 25 - 0.4 0.6 full - - 1.0 ISL54208
4 fn6410.0 december 18, 2006 off leakage current, i nox(off) v dd = 3.6v, in = 0v, ctrl = 3.6v, v comx = 0.5v, 0v, v nox = 0v, 0.5v, v ncx = float 25 -10 - 10 na full -70 - 70 na on leakage current, i nox v dd = 3.3v, in = 3.3v, ctrl = 0v or 3.3v, v nox = 2.0v, v comx , v ncx = float 25 -10 2 10 na full -75 - 75 na dynamic characteristics turn-on time, t on v dd = 2.7v, r l = 50 , c l = 10pf, (see figure 1) 25 - 67 - ns turn-off time, t off v dd = 2.7v, r l = 50 , c l = 10pf, (see figure 1) 25 - 48 - ns break-before-make time delay, t d v dd = 2.7v, r l = 50 , c l = 10pf, (see figure 2) 25 - 18 - ns skew, t skew v dd = 3.3v, in = 3.3v, ctrl = 3.3v, r l = 45 , c l = 10pf, t r = t f = 750ps at 480mbps, (duty cycle = 50%) (see figure 7) 25 - 50 - ps total jitter, t j v dd = 3.3v, in = 3.3v, ctrl = 3.3v, r l = 45 , c l = 10pf, t r = t f = 750ps at 480mbps 25 - 210 - ps propagation delay, t pd v dd = 3.3v, in = 3.3v, ctrl = 3.3v, r l = 45 , c l = 10pf, ( see figure 7) 25 - 250 - ps crosstalk (channel-to-channel), nc2 to com1, nc1 to com2 v dd = 3.3v, in = 0v, ctrl = 3.3v, r l = 75 , f = 4mhz, v ncx = 300mv p-p , (see figure 6) 25 - -78 - db differential gain v signal = 300mvp-p, v offset = 0v to 0.7v, f = 3.58mhz, r l = 75 25 - 0.28 - % differential phase v signal = 300mvp-p, v offset = 0v to 0.7v, f = 3.58mhz, r l = 75 25 - 0.04 - deg total harmonic distortion f = 20hz to 20khz, v dd = 3.0v, in = 0v, ctrl = 3.0v, v ncx = 0.707v rms (2v p-p ), r l = 32 25 - 0.06 - % ncx (audio/video) switch -3db bandwidth signal = 8dbm, r l = 75 , c l = 5pf, ( see figure 14) 25 - 338 - mhz nox (usb) switch -3db bandwidth signal = 0dbm, 0.2v dc offset, r l = 50 , c l = 5pf 25 - 630 - mhz nox off capacitance, c nox(off) f = 1mhz, v dd = 3.0v, in = 0v, ctrl = 3.0v, v nox = v comx = 0v, (see figure 5) 25 - 6 - pf ncx off capacitance, c ncx(off) f = 1mhz, v dd = 3.0v, in = 3.0v, ctrl = 3.0v, v ncx = v comx = 0v, (see figure 5) 25 - 9 - pf comx on capacitance, c comx(on) f = 1mhz, v dd = 3.0v, in = 3.0v, ctrl = 3.0v, v nox = v comx = 0v, (see figure 5) 25 - 10 - pf power supply characteristics power supply range, v dd full 1.8 5.5 v positive supply current, i dd v dd = 3.6v, in = 0v or 3.6v, ctrl = 3.6v 25 - 6 8 a full - - 10 a positive supply current, i dd (low power state) v dd = 3.6v, in = 0v, ctrl = 0v or float 25 - 1 7 na full - - 140 na digital input characteristics voltage low, v inl , v ctrll v dd = 2.7v to 3.6v full - - 0.5 v voltage high, v inh , v ctrlh v dd = 2.7v to 3.6v full 1.4 - - v input current, i inl , i ctrll v dd = 3.6v, in = 0v, ctrl = 0v full -50 20 50 na input current, i inh v dd = 3.6v, in = 3.6v, ctrl = 0v full -50 20 50 na electrical specifications - 2.7v to 3.6v supply test conditions: v dd = +3.3v, gnd = 0v, v inh = 1.4v, v inl = 0.5v, v ctrlh = 1.4v, v ctrll = 0.5v, (notes 4, 6), unless otherwise specified. (continued) parameter test conditions temp (c) (note 5) min typ (note 5) max units ISL54208
5 fn6410.0 december 18, 2006 input current, i ctrlh v dd = 3.6v, in = 0v, ctrl = 3.6v full -2 1.1 2 a ctrl pull-down resistor, r ctrl v dd = 3.6v, in = 0v, ctrl = 3.6v full - 4 - m notes: 4. v logic = input voltage to perform proper function. 5. the algebraic convention, whereby the most negative value is a minimum and the most pos itive a maximum, is used in this data sheet. 6. parameters with limits are 100% tested at +25c . limits across the full temperature ran ge are guaranteed by design and correlation. 7. flatness is defined as the difference between maximum and minimum value of on-resi stance over the specified analog signal ran ge. 8. r on matching between channels is ca lculated by subtracting the channel with the highest max r on value from the channel with lowest max r on value, between nc1 and nc2 or between no1 and no2. test circuits and waveforms logic input waveform is inverted for switches that have the opposite logic sense. figure 1a. measurement points repeat test for all switches. c l includes fixture and stray capacitance. figure 1b. test circuit figure 1. switching times figure 2a. measurement points repeat test for all switches. c l includes fixture and stray capacitance. figure 2b. test circuit figure 2. break-before-make time electrical specifications - 2.7v to 3.6v supply test conditions: v dd = +3.3v, gnd = 0v, v inh = 1.4v, v inl = 0.5v, v ctrlh = 1.4v, v ctrll = 0.5v, (notes 4, 6), unless otherwise specified. (continued) parameter test conditions temp (c) (note 5) min typ (note 5) max units 50% t r <20ns t f <20ns t off 90% v dd 0v v input 0v t on logic input switch input switch output 90% v out v out v (input) r l r l r on () + ------------------------------ = switch input v in v out r l c l comx no or nc in 50 10pf gnd v dd c ctrl v input 90% v dd 0v t d logic input switch output 0v v out v in in comx r l c l v out 10pf 50 nox ncx v dd gnd v input c ctrl ISL54208
6 fn6410.0 december 18, 2006 figure 3. audio/video r on test circuit figure 4. usb r on test circuit figure 5. capacitance test circuit figure 6. ncx crosstalk test circuit test circuits and waveforms (continued) v dd c ov ncx comx in gnd v ncx v 1 r on = v 1 /100ma 100ma repeat test for all switches. ctrl v dd c vdd nox comx in gnd v nox v 1 r on = v 1 /40ma 40ma repeat test for all switches. ctrl v dd c gnd ncx or nox comx in impedance analyzer 0v or repeat test for all switches. ctrl v dd 0v analyzer v dd c ncx signal generator r l gnd in comx 75 nc comx ncx signal direction through switch is reversed, worst case values are recorded. repeat test for all switches. ctrl ISL54208
7 fn6410.0 december 18, 2006 figure 7a. measurement poin ts figure 7b. test circuit figure 7. skew test test circuits and waveforms (continued) din+ din- out+ out- 50% 50% 90% 10% 10% 10% 10% 90% 90% 50% 90% 50% t ri t fi t ro t f0 t skew_i t skew_o out+ c l com2 no1 gnd v dd c no2 com1 c l out- din+ din- |tro - tri| delay due to switch for rising input and rising output signals. |tfo - tfi| delay due to switch for falling input and falling output signals. |tskew_0| change in skew through the switch for output signals. |tskew_i| change in skew through the switch for input signals. 15.8 15.8 143w 143 45 45 ctrl in v dd ISL54208
8 fn6410.0 december 18, 2006 application block diagrams detailed description the ISL54208 device is a dual single pole/double throw (spdt) analog switch device th at can operate from a single dc power supply in the range of 1.8v to 5.5v. it was designed to function as a dual 2 to 1 multiplexer to select between usb differential data signals and mono audio/composite video baseband signals (cvbs). it comes in tiny tqfn and tdfn packages for use in cameras, camcorders, video mp3 players, pdas, cell phones, and other personal media players. the part consists of two 3 audio/video switches and two 5 usb switches. the audio/video switches can accept signals that swing below ground. they were designed to pass ground reference audio or dc restored with synch composite video signals with minimal distortion. the usb switches were designed to pass high-speed usb differential data signals with minimal edge and phase distortion. the ISL54208 was specifically designed for digital cameras, camcorders, mp3 players, ce ll phones and other personal media player applications that need to combine the audio/video jacks and the usb data connector into a single shared connector, thereby saving space and component cost. typical application block diagrams of this functionality is shown above. the ISL54208 logic control pins are 1.8v logic compatible and can be driven by a standard controller. it has a single logic control pin (in) that selects between the audio/video switches and the usb switches . the ISL54208 also contains a logic control pin (ctrl) that when driven low while in is low, opens all switches and puts the part into a low power state, drawing typically 1na of i dd current. a detailed description of the two types of switches is provided in the sections below. the usb transmission and ISL54208 usb transceiver high-speed audio usb and audio/video jack com1 com2 in gnd no1 no2 nc1 nc2 vdd ctrl logic circuitry controller 4m 50k 50k ntsc or pal video d+ d- ISL54208 usb transceiver high-speed audio usb and audio/video jack com1 com2 in gnd no1 no2 nc1 nc2 vdd ctrl logic circuitry controller 22k 4m 4m 50k 50k ntsc or pal video d+ d- logic control via micro-processor logic control via vbus voltage from computer or usb hub vbus vbus ISL54208
9 fn6410.0 december 18, 2006 audio/video playback are intended to be mutually exclusive operations. nc1 and nc2 audio/video switches the two nc (normally closed) audio/video switches (nc1, nc2) are 3 switches that can pass signals that swing below ground by as much as 1.5v. they were designed to pass ground reference audio signals and dc restored composite base-band signals (cvbs) including negative synchronizing pulse wi th minimal insertion loss and very low distortion and degradation. the -3db bandwidth into 75 is 338mhz (figure 17). crosstalk between nc1 and nc2 @ 4mhz is -78db (figure 16) which allows composite video to be routed through one switch and mono-aud io through the other switch with little interference. the recommended maximum signal range is from -1.5v to 1.5v. you can apply positive si gnals greater than 1.5v but the r on resistance of the switch increases rapidly above 1.5v. the signal should not be allowed to exceed the v dd rail or swing more negative than -1.5v. over a signal range of 1v (0.707vrms) with v dd >2.7v, these switches have an extremely low r on resistance variation. they can pass a ground referenced audio signal with very low distortion (<0.06% thd+n) when delivering 15.6mw into a 32 headphone speaker load. see figures 10, 11, 12, and 13 thd+n performance curves. figures 8 and 9 shows the vector scope plots of a standard ntsc color bar signal at both the input (figure 8) and output (figure 9) of the ISL54208. the plots show that except for a little attentuation, due to switch r on and test fixture cabling, there is virtually no degradation of the video waveform through the switch. figure 18 shows the differential gain (dg) and differential phase (dp) plots at the output of the switch using an actual ntsc composite video signal and a vm700a video measurement test set. dg = 0.28% and dp = 0.04deg. the nc switches are uni-dir ectional switches. the audio/video sources should be connected at the nc side of the switch (pins 7 and 8) and the speaker load and video receiver should be connected at the com side of the switch (pins 3 and 4). the nc switches are active (t urned on) whenever the in voltage is to 0.5v and the ctrl voltage to 1.4v. note: whenever the nc switches are on the usb transceiver drivers need to be in the high impedance state or static high or low state. no1 and no2 usb switches the two no (normally open) usb switches (no1, no2) are 5 bidirectional switches that were designed to pass high- speed usb differential signals in the range of 0v to 400mv. these switches have low capacitance and high bandwidth to pass usb high-speed signals (480mbps) with minimum edge and phase distortion to meet high-speed usb 2.0 high- speed signal quality specifications. see figure 14 for high- speed eye pattern taken with switch in the signal path. the maximum signal range for the usb switches is from -1.5v to v dd . the signal voltage at no1 and no2 should not be allow to exceed the v dd voltage rail or go below ground by more than -1.5v. the no switches are active (turned on) whenever the in voltage is to 1.4v. note: whenever the no switches are on the audio and video drivers need to be at ac or dc ground or floating to keep from interfering with the data transmission. figure 8. vector-scope plot before switch figure 9. vector-scope plot after switch ISL54208
10 fn6410.0 december 18, 2006 ISL54208 operation the discussion that follows will discuss using the ISL54208 in the typical application shown in the block diagrams on page 8. vdd supply the dc power supply connected at vdd (pin 1) provides the required bias voltage for proper switch operation. the part can operate with a supply voltage in the range of 1.8v to 5.5v. in a typical usb/audio/video application for portable battery powered devices the v dd voltage will come from a battery or an ldo and be in the range of 2.7v to 3.6v. for best possible usb full-speed operation (12mbps) it is recommended that the vdd voltage be 3.3v in order to get a usb data signal level above 2.5v. logic control the state of the ISL54208 device is determined by the voltage at the in pin (pin 2) and the ctrl pin (pin 10). refer to truth-table on page 2 of dat a sheet. these logic pins are 1.8v compatible with v dd in the range of 2.7v to 3.6v and can be controlled by a standard processor. the ctrl pin is internally pulled low through a 4m resistors to ground and can be left floating or tri-stated by the processor. the ctrl control pin is only active when in is logic ?0?. the in pin does not have an internal pull-down resistor and must not be allowed to float. it must be driven high or low. the voltage at the in pin can exceed the v dd voltage by as much as 2.55v. this allows the vbus voltage from a computer or usb hub (4.4v to 5.25v) to drive the in pin while the v dd voltage is in the range of 2.7v to 3.6v. an external pull-down resistor is required from the in pin to ground when directly driving the in pin with the computer vbus voltage. see the section titled ?using the computer vbus voltage to drive the ?in? pin?. logic control voltage levels: in = logic ?0? (low) when 0.5v in = logic ?1? (high) when in 1.4v ctrl = logic ?0? (low) when 0.5v or floating. ctrl = logic ?1? (high) when 1.4v audio/video mode if the in pin = logic ?0? and ctrl pin = logic ?1,? the part will be in the audio/video mode. in audio/video mode the nc1 and nc2 3 audio/video switches are on and the no1 and no2 5 usb switches are off (high impedance). when nothing is plugged into the common connector or a audio/video jack is plugged into the common connector, the processor will sense that ther e is no voltage at the vbus pin of the connector and will drive and hold the in control pin of the ISL54208 low. as long as the ctrl = logic ?1,? the ISL54208 part will be in the audio/video mode and the media player audio and video drivers can drive the speaker and video display. usb mode if the in pin = logic ?1? and ctrl pin = logic ?0? or logic ?1? the part will go into usb m ode. in usb mode, the no1 and no2 5 switches are on and the nc1 and nc2 3 audio/video switches ar e off (high impedance). when a usb cable from a computer or usb hub is connected at the common connector, the processor will sense the present of the 5v vbus and drive the in pin voltage high. the ISL54208 part will go into the usb mode. in usb mode, the computer or usb hub transceiver and the media player usb transceiver are connected and digital data will be able to be transmitted back and forth. when the usb cable is disconnected, the processor will sense that the 5v vbus voltage is no longer connected and will drive the in pin low and put the part back into the audio/video or low power mode. low power mode if the in pin = logic ?0? and ctrl pin = logic ?0,? the part will be in the low power mode. in the low power mode, the ncx switches and the nox switches are off (high impedance). in this state, the device draws typically 1na of current. using the computer vbus voltage to drive the ?in? pin external in pull-down resistor rather than using a micro-proc essor to control the in logic pin you can directly drive the in pin using the vbus voltage from the computer or usb hub. in order to do this you must connected an external pull-down resistor from the in pin to ground. when an audio/video jack or nothing is connected at the common connector the external pull-down resistor will pull the in pin low putting the ISL54208 in the audio/video mode or low power mode depending on the condition of the ctrl pin. when a usb cable is connected at the common connector the voltage at the in pin will be driven to 5v and the part will automatically go into the usb mode. when the usb cable is disconnected from the common connector the voltage at the in pin will be pulled low by the pull-down resistor and return to the audio/video mode or low power mode depending on the condition of the ctrl pin. note: the voltage at the in pin can exceed the vdd voltage by as much as 2.55v. this allows the vbus voltage from a computer or usb hub (4.4v to 5.25v) to drive the in pin while the v dd voltage is in the range of 2.7v to 3.6v. ISL54208
11 fn6410.0 december 18, 2006 external series resistor at in logic control pin the ISL54208 contains a clamp circuit between in and vdd. whenever the in voltage is greater than the v dd voltage by more than 2.55v, current will flow through this clamp circuitry into the v dd power supply bus. during normal usb operation, v dd is in the range of 2.7v to 3.6v and in (v bus voltage from computer or usb hub) is in the range of 4.4v to 5.25v, the clamp circuit is not active and no current will flow through the clamp into the v dd supply. in a usb application, the situation can exist where the v bus voltage from the computer could be applied at the in pin before the v dd voltage is up to its normal operating voltage range and current will flow through the clamp into the v dd power supply bus. this current could be quite high when v dd is off or at 0v and could potentially damage other components connected in the circuit. in the application circuit, a 22k resistor has been put in series with the in pin to limit the current to a safe level during this situation. it is recommended that a current limiting resistor in the range of 10k to 50k be connected in series with the in pin. it will have minimal impact on the logic level at the in pin during normal usb operation and protect the circuit during the time v bus is present before v dd is up to its normal operating voltage. note: no external resistor is required in applications where in pin voltage will not exceed v dd by more than 2.55v. typical performance curves t a = +25c, unless otherwise specified figure 10. thd+n vs supply voltage vs frequency fi gure 11. thd+n vs signal levels vs frequency figure 12. thd+n vs output voltag e figure 13. thd+n vs output power thd+n (%) frequency (hz) 20 200 2k 20k 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 v dd = 2.6v v dd = 2.7v v dd = 3.6v v dd = 3v r load = 32 v load = 0.707v rms thd+n (%) frequency (hz) 20 200 2k 20k r load = 32 v dd = 3v 0 0.1 0.2 0.3 0.4 2v p-p 1v p-p 3v p-p 2.5v p-p thd+n (%) output voltage (v p-p ) 00.511.522.533.5 0 0.1 0.2 0.3 0.4 0.5 r load = 32 freq = 1khz v dd =3v thd+n (%) output power (mw) 0 1020304050 0 0.1 0.2 0.3 0.4 0.5 r load = 32 freq = 1khz v dd =3v ISL54208
12 fn6410.0 december 18, 2006 figure 14. eye pattern: 480mbps with nox switches in the signal path figure 15. frequency response fig ure 16. video to audio crosstalk typical performance curves t a = +25c, unless otherwise specified (continued) time (10ns/div) voltage (835mv/div) frequency (hz) 0 -1 normalized gain (db) 1m 10m 100m 1g v in = 0.2v p-p to 2v p-p r l = 50 -2 -3 -4 1 nox switch frequency (mhz) 0 -60 normalized gain (db) 0.01 0.1 1 500 -70 -80 -40 -90 -110 -10 -20 -30 -50 10 0.001 100 36 v in = 0.2v p-p to 2v p-p r l = 75 ISL54208
13 fn6410.0 december 18, 2006 figure 17. figure 18. die characteristics substrate potential (powered up): gnd (tdfn paddle connection: tie to gnd or float) transistor count: 98 process: submicron cmos typical performance curves t a = +25c, unless otherwise specified (continued) frequency (hz) 0 -1 normalized gain (db) 1m 10m 100m 1g v in = 0.2v p-p to 2v p-p r l = 75 -2 -3 -4 1 ncx switches gain (%) phase (deg) ISL54208
14 fn6410.0 december 18, 2006 ultra thin quad flat no-lead plastic package (utqfn) 6 b e a d 0.10 c 2x 2 0.10 m c a b 0.05 m c (nd-1) x e c 0.05 c a 0.10 c a1 seating plane e index area pin #1 id 3 5 (datum a) (datum b) n-1 1 n nx l nx b 2 1 n top view bottom view side view nx (b) section "c-c" for odd terminal/side e cc 5 c l terminal tip (a1) l detail ?a? pin 1 id l 0.05 min 0.10 min 0.10 c 2x 4xk b l10.2.1x1.6a 10 lead ultra thin quad flat no-lead plastic package symbol millimeters notes min nominal max a 0.45 0.50 0.55 - a1 - - 0.05 - a3 0.127 ref - b 0.15 0.20 0.25 5 d 2.05 2.10 2.15 - e 1.55 1.60 1.65 - e 0.50 bsc - k0.20 --- l 0.35 0.40 0.45 - n102 nd 4 3 ne 1 3 0- 12 4 rev. 3 6/06 notes: 1. dimensioning and tolerancing conform to asme y14.5-1994. 2. n is the number of terminals. 3. nd and ne refer to the number of terminals on d and e side, respectively. 4. all dimensions are in millim eters. angles are in degrees. 5. dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 6. the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. the pin #1 identifier may be either a mold or mark feature. 7. maximum package warpage is 0.05mm. 8. maximum allowable burrs is 0.076mm in all directions. 9. same as jedec mo-255uabd except: no lead-pull-back, "a" min dimension = 0.45 not 0.50mm "l" max dimension = 0.45 not 0.42mm. 10. for additional information, to assist with the pcb land pattern design effort, see intersil technical brief tb389. 2.00 0.80 1.75 0.25 0.50 0.275 2.50 land pattern 10 ISL54208
15 all intersil u.s. products are manufactured, asse mbled and tested utilizing iso9000 quality systems. intersil corporation?s quality certifications ca n be viewed at www.intersil.com/design/quality intersil products are sold by description only. intersil corpor ation reserves the right to make changes in circuit design, soft ware and/or specifications at any time without notice. accordingly, the reader is cautioned to verify that data sheets are current before placing orders. information furnishe d by intersil is believed to be accurate and reliable. however, no responsibility is assumed by intersil or its subsidiaries for its use; nor for any infringements of paten ts or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of intersil or its subsidiari es. for information regarding intersil corporation and its products, see www.intersil.com fn6410.0 december 18, 2006 ISL54208 thin dual flat no-lea d plastic package (tdfn) // nx (b) section "c-c" for odd terminal/side e cc 5 c l terminal tip (a1) bottom view a 6 area index c c 0.10 0.08 side view 0.10 2x e a b c 0.10 d top view cb 2x 6 8 area index nx l e2 e2/2 ref. e n (nd-1)xe (datum a) (datum b) 5 0.10 8 7 d2 b a c n-1 12 plane seating c a a3 nx b d2/2 nx k l1 9 l m l10.3x3a 10 lead thin dual flat no-lead plastic package symbol millimeters notes min nominal max a 0.70 0.75 0.80 - a1 - - 0.05 - a3 0.20 ref - b 0.20 0.25 0.30 5, 8 d 2.95 3.0 3.05 - d2 2.25 2.30 2.35 7, 8 e 2.95 3.0 3.05 - e2 1.45 1.50 1.55 7, 8 e 0.50 bsc - k 0.25 - - - l 0.25 0.30 0.35 8 n 10 2 nd 5 3 rev. 3 3/06 notes: 1. dimensioning and tolerancing conform to asme y14.5-1994. 2. n is the number of terminals. 3. nd refers to the number of terminals on d. 4. all dimensions are in millim eters. angles are in degrees. 5. dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 6. the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. the pin #1 identifier may be either a mold or mark feature. 7. dimensions d2 and e2 are fo r the exposed pads which provide improved electrical and thermal performance. 8. nominal dimensions are provided to assist with pcb land pattern design efforts, see intersil technical brief tb389. 9. compliant to jedec mo-229-weed-3 except for d2 dimensions.

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