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1 ? fn6662.1 isl54211 mp3/usb 2.0 high speed switch with negative signal handl ing/click and pop suppression the intersil isl54211 dual spdt (single pole/double throw) switches combine low distortion audio and accurate usb 2.0 high speed data (480mbps) signal switching in the same low voltage device. when operated with a 2.7v to 5.0v single supply these analog switches allow audio signal swings below-ground, allowing the use of a common usb and audio headphone connector in personal media players and other portable battery powered devices. the isl54211 logic control pins are 1.8v compatible with a supply voltage of 2.7v to 3.6v, which allows for control via a standard controller. the part has an audio enable control pin (ctrl) to open all in-line switches and activate the audio click and pop circuitry. the high off-isolation and specia l click/pop circuitry of the audio switches eliminates c lick and pops in the head-phones when the audio codec drivers are powering up or down or when a headphone is inserted or removed from the headphone jack. it?s available in a tiny 10 ld 1.8mmx1.4mm ultra-thin tqfn package and a 10 ld 3mmx3mm tdfn package. it operates over a temperature range of -40 to +85c. related literature ? technical brief tb363 ?guidelines for handling and processing moisture sensit ive surface mount devices (smds)? features ? high speed (480mbps) and full speed (12mbps) signaling capability per usb 2.0 ? low distortion negative signal capability ? clickless/popless audio switches ? enable control pin (ctrl) to open all switches ? low distortion headphone audio signals - thd+n at 1mw into 32 load . . . . . . . . . . . . . 0.014% ? crosstalk (20hz to 20khz). . . . . . . . . . . . . . . . . . . -100db ? off-isolation (20hz to 100khz) . . . . . . . . . . . . . . . 95db ? single supply operation (v dd ) . . . . . . . . . . . . 2.7v to 5.0v ? -3db bandwidth usb switch . . . . . . . . . . . . . . . . . 700mhz ? available in tqfn and tdfn packages ? compliant with usb 2.0 short circuit requirements without additional external components ? pb-free (rohs compliant) applications ? mp3 and other personal media players ? cellular/mobile phones ?pda?s ? audio/usb switching application block diagram isl54211 usb transceiver high-speed usb/headphone jack com - com + in gnd d- d+ l r vdd ctrl logic control 4m 4m click and pop v bus 3.3v 200k 200k controller audio codec data sheet august 25, 2008 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. 2008. all rights reserved all other trademarks mentioned are the property of their respective owners.
2 fn6662.1 august 25, 2008 pinouts (note 1) isl54211 (10 ld 1.8mmx1.4mm tqfn) top view isl54211 (10 ld 3.0mmx3.0mm tdfn) top view note: 1. switches shown for in = logic ?0? and ctrl = logic ?1?. 9 10 6 7 8 4 3 5 2 1 vdd in com - com + d- l d+ r gnd ctrl logic control click/pop 2 4 5 d- com - l in 3 7 8 d+ com + r 9 6 vdd 1 gnd 10 ctrl logic control 200k 200k 4m 4m click/ pop truth table isl54211 in ctrl l, r d+, d- 00offoff 0 1 on off 1xoffon in, ctrl: logic ?0? when 0.5v or floating, logic ?1? when 1.4v with 2.7v to 3.6v supply. pin descriptions isl54211 tqfn tdfn name function 1 2 in digital control input 2 3 com- voice and data common pin 3 4 com+ voice and data common pin 4 5 gnd ground connection 5 6 r audio right input 6 7 l audio left input 7 8 d+ usb differential input 8 9 d- usb differential input 9 10 ctrl digital control input (audio enable) 10 1 vdd power supply ordering information part number part marking temp. range (c) package (pb-free) pkg. dwg. # isl54211iruz-t* (note 3) 1 -40 to +85 10 ld 1.8x1.4mm tqfn l10.1.8x1.4a isl54211irtz (note 2) 4211 -40 to +85 10 ld 3mmx3mm tdfn l10.3x3a ISL54211IRTZ-T* (note 2) 4211 -40 to +85 10 ld 3mmx3mm tdfn l10.3x3a *please refer to tb347 for detai ls on reel specifications. notes: 2. these intersil pb-free plastic packaged prod ucts employ special pb-free material sets, molding compounds/die attach materials , and 100% matte tin plate plus anneal (e3 termination fi nish, which is rohs compliant and compatible 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 o f ipc/jedec j std-020. 3. these intersil pb-free plastic packaged prod ucts employ special pb-free material sets; molding compounds/die attach materials and nipdau plate - e4 termination finish, which is rohs compliant and compat ible with both snpb and pb-free soldering operations. intersil pb-free products are msl classified at pb-free peak re flow temperatures that meet or exceed the pb-free requirements of ipc/jedec j std -020. isl54211
3 fn6662.1 august 25, 2008 absolute maximum ratings thermal information v dd to gnd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3v to 5.5v input voltages d+, d-, l, r (note 4) . . . . . . . . . . . . . . . . . . -2v to ((v dd ) + 0.3v) in (note 4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2v to 5.5v ctrl (note 4) . . . . . . . . . . . . . . . . . . . . . . -0.3 to ((v dd ) + 0.3v) output voltages com-, com+ (note 4) . . . . . . . . . . . . . . . . -2v to ((v dd ) + 0.3v) continuous current (audio switches). . . . . . . . . . . . . . . . . 150ma peak current (audio switches) (pulsed 1ms, 10% duty cycle, max). . . . . . . . . . . . . . . . 300ma continuous current (usb switches). . . . . . . . . . . . . . . . . . . 40ma peak current (usb switches) (pulsed 1ms, 10% duty cycle, max) . . . . . . . . . . . . . . . . 100ma esd rating human body model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6kv machine model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300v charged device model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kv thermal resistance (typical) ja (c/w) jc (c/w) 10 ld tqfn package (note 5) . . . . . 160 n/a 10 ld 3x3 tdfn package (notes 6, 7) 55 18 maximum junction temperature (plastic package) . . . . . . . +150c maximum storage temperature range. . . . . . . . . . . . -65c to +150c pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/pbfree/pb-freereflow.asp operating conditions temperature range . . . . . . . . . . . . . . . . . . . . . . . . . -40c to +85c caution: do not operate at or near the maximum ratings listed for extended periods of time. expos ure to such conditions may adv ersely impact product reliability and result in failures not covered by warranty. notes: 4. signals on d+, d-, l, r, co m-, com+, ctrl, in exceeding v dd or gnd by specified amount are clamped. limit current to maximum current ratings. 5. 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. 6. ja is measured in free air with the component mounted on a high ef fective thermal conductivity test board with ?direct attach? fe atures. see tech brief tb379. 7. for jc , the ?case temp? location is the center of the exposed metal pad on the package underside. electrical specifications - 2.7v to 3.6v supply test conditions: v dd = +3.0v, gnd = 0v, v inh = 1.4v, v inl = 0.5v, v ctrlh = 1.4v, v ctrll = 0.5v, (note 8), unless otherwise specified. parameter test conditions temp (c) min (notes 9, 10) typ (note 12) max (notes 9, 10) units analog switch characteristics audio switches (l, r) analog signal range, v analog v dd = 2.7v to 3.6v, in = float, ctrl = 1.4v full -1.5 - 1.5 v on-resistance, r on v dd = 3.0v, in = float, ctrl = 1.4v, i comx = 40ma, v l or v r = -0.85v to 0.85v (see figure 2) +25 - 2.4 2.8 full - - 3.8 r on matching between channels, r on v dd = 3.0v, in = 0.5v, ctrl = 1.4v, i comx = 40ma, v l or v r = voltage at max r on over signal range of -0.85v to 0.85v, (note 13) +25 - 0.1 0.32 full - - 0.4 r on flatness, r flat(on) v dd = 3.0v, in = 0.5v, ctrl = 1.4v, i comx = 40ma, v l or v r = -0.85v to 0.85v, (note 11) +25 - 0.02 0.06 full - - 0.07 insertion loss, g on v dd = 3.0v, in = 0.5v, ctrl = v dd , r load = 32 +25 - -0.78 - db insertion loss, g on v dd = 3.0v, in = 0.5v, ctrl = v dd , r load = 15 +25 - -1.5 - db discharge pull-down resistance, r l , r r v dd = 3.6v, in = 0.5v, ctrl = 0.5v, v com- or v com+ = -0.85v, 0.85v, v l or v r = -0.85v, 0.85v, v d+ and v d- = floating; measure current through the discharge pull-down resistor and calculate resistance value. +25 - 40 - usb switches (d+, d-) analog signal range, v analog v dd = 2.7v to 3.6v, in = v dd , ctrl = 0v or v dd full 0 - v dd v on-resistance, r on v dd = 3.3v, in = 1.4v, ctrl = 1.4v, i comx = 1ma, v d+ or v d- = 3.3v (see figure 3) +25 - 25 35 full - - 40 isl54211
4 fn6662.1 august 25, 2008 on-resistance, r on v dd = 3.3v, in = 1.4v, ctrl = 0v or v dd , i comx = 40ma, v d+ or v d- = 0v to 400mv (see figure 3) +25 - 5.4 6 full - - 7.5 r on matching between channels, r on v dd = 3.3v, in = 1.4v, ctrl = 0v or v dd , i comx = 40ma, v d+ or v d- = voltage at max r on , (note 13) +25 - 0.02 0.25 full - - 0.25 r on flatness, r flat(on) v dd = 3.3v, in = 1.4v, ctrl = 0v or v dd , i comx = 40ma, v d+ or v d- = 0v to 400mv, (note 9) +25 - 0.45 0.55 full - - 0.6 off leakage current, i d+(off) or i d-(off) v dd = 3.6v, in = 0v, ctrl = 3.6v, v com- or v com+ = 0.5v, 0v, v d+ or v d- = 0v, 0.5v, v l and v r =float +25 -10 4 10 na full -50 - 50 na on leakage current, i dx v dd = 3.6v, in = v dd , ctrl = 0v or v dd , v d+ or v d- =2.7v, v com- or v com+ = float, v l and v r = float; measuring current through 200k resistor at com side +25 -20 11 20 a full -30 - 30 a dynamic characteristics usb turn-on time, t on v dd = 2.7v, r l = 50 , c l = 10pf (see figure 1) +25 - 43 - ns usb turn-off time, t off v dd = 2.7v, r l = 50 , c l = 10pf (see figure 1) +25 - 14.5 - ns audio turn-on time, t on v dd = 2.7v, r l = 50 , c l = 10pf (see figure 1) +25 - 7.5 - s audio turn-off time, t off v dd = 2.7v, r l = 50 , c l = 10pf (see figure 1) +25 - 130 - ns skew, t skew v dd = 3.0v, in = 3.0v, ctrl = 0v or 3v, r l = 45 , c l =10pf, t r = t f = 750ps at 480mbps, (duty cycle = 50%) (see figure 6) +25 - 50 - ps total jitter, t j v dd = 3.0v, in = 3.0v, ctrl = 0v or 3v, r l = 50 , c l =10pf, t r = t f = 750ps at 480mbps +25 - 210 - ps propagation delay, t pd v dd = 3.0v, in = 3.0v, ctrl = 0v or 3v, r l = 45 , c l =10pf ( see figure 6) +25 - 250 - ps audio crosstalk r to com-, l to com+ v dd = 3.0v, in = float, ctrl = 3.0v, r l = 32 , f = 20hz to 20khz, v r or v l = 0.707v rms (2v p-p ) (see figure 5) +25 - -100 - db crosstalk (audio-to-usb, usb-to-audio) v dd = 3.0v, r l = 50 , f = 100khz (see figure 5) +25 - -100 - db off-isolation v dd = 3.0v, r l = 50 , f = 100khz +25 - 95 - db v dd = 3.0v, r l = 15 , f = 20hz to 20khz +25 - 111 - db v dd = 3.0v, r l = 32 , f = 20hz to 20khz +25 - 105 - db v dd = 3.0v, r l = 1k , f = 20hz to 20khz +25 - 75 - db v dd = 3.0v, r l = 10k , f = 20hz to 20khz +25 - 57 - db v dd = 3.0v, r l = 100k , f = 20hz to 20khz +25 - 45 - db total harmonic distortion f = 20hz to 20khz, v dd = 3.0v, in = float, ctrl = 3.0v, v l or v r = 180mv rms (509mv p-p ), r l = 32 +25 - 0.014 - % f = 20hz to 20khz, v dd = 3.0v, in = float, ctrl = 3.0v, v l or v r = 0.707v rms (2v p-p ), r l = 32 +25 - 0.056 - % f = 20hz to 20khz, v dd = 3.0v, in = float, ctrl = 3.0v, v l or v r = 180mv rms (509mv p-p ), r l = 15 +25 - 0.043 - % f = 20hz to 20khz, v dd = 3.0v, in = float, ctrl = 3.0v, v l or v r = 0.707v rms (2v p-p ), r l = 15 +25 - 0.19 - % click and pop v dd = 3.3v, ctrl = 0v, in = float, r l = 1k , v l or v r = 0 to 1.25v dc step or 1.25v to 0v dc step (see figure 7) +25 - 60 - vp v dd = 3.3v, ctrl = 0.5hz square wave, in = float, r l =30.1 or 1k , v l or v r = ac-coupled to ground (see figure 8) +25 - 500 - vp electrical specifications - 2.7v to 3.6v supply test conditions: v dd = +3.0v, gnd = 0v, v inh = 1.4v, v inl = 0.5v, v ctrlh =1.4v, v ctrll = 0.5v, (note 8), unless otherwise specified. (continued) parameter test conditions temp (c) min (notes 9, 10) typ (note 12) max (notes 9, 10) units isl54211
5 fn6662.1 august 25, 2008 usb switch -3db bandwidth signal = 0dbm, 0.2vdc offset, r l = 50 , c l = 5pf +25 - 700 - mhz d+/d- off capacitance, c d+off , c d-off f = 1mhz, v dd = 3.0v, in = float, ctrl = 3.0v, v d- or v d+ = v comx = 0v (see figure 4) +25 - 4 - pf com on capacitance, c com- (on) , c com+(on) f = 1mhz, v dd = 3.0v, in = 3.0v, ctrl = 0v or 3v, v d- or v d+ = v comx = 0v, (see figure 4) +25 - 9 - pf power supply characteristics power supply range, v dd full 2.7 3.6 v positive supply current, i dd (audio mode) v dd = 3.6v, in = 0v, ctrl = 3.6v +25 - 7 10 a full - - 12 a positive supply current, i dd (usb mode) v dd = 3.6v, in = 3.6v, ctrl = 3.6v +25 - 2.4 4 a full - - 5 a positive supply current, i dd (mute mode) v dd = 3.6v, in = 0v, ctrl = 0v +25 - 2.4 4 a full - - 5 a digital input characteristics in voltage low, v inl v dd = 2.7v to 3.6v full - - 0.5 v in voltage high, v inh v dd = 2.7v to 3.6v full 1.4 - - v ctrl voltage low, v ctrll v dd = 2.7v to 3.6v full - - 0.5 v ctrl voltage high, 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 or float, ctrl = 0v or float full -50 2 50 na input current, i inh v dd = 3.6v, in = 3.6v, ctrl = 0v or float full -2 1 2 a input current, i ctrlh v dd = 3.6v, in = 0v or float, ctrl = 3.6v full -2 1 2 a in pull-down resistor, r in v dd = 3.6v, in = 3.6v, ctrl = 0v or float; measure current through the internal pull-down resistor and calculate resistance value. full - 4 - m ctrl pull-down resistor, r ctrl v dd = 3.6v, in = 0v or float, ctrl = 3.6v; measure current through the internal pull-down resistor and calculate resistance value. full - 4 - m notes: 8. v logic = input voltage to perform proper function. 9. the algebraic convention, whereby the most negative value is a minimum and the most pos itive a maximum, is used in this data sheet. 10. parameters with min and/or max limits are 100% tested at +25 c, unless otherwise specified. te mperature limits established b y characterization and are not production tested. 11. flatness is defined as the difference between maximum and minimum value of on-res istance over the spec ified analog signal ra nge. 12. limits established by characteri zation and are not production tested. 13. r on matching between channels is calculated by s ubtracting the channel with the highest max r on value from the channel with lowest max r on value, between l and r or between d+ and d-. electrical specifications - 2.7v to 3.6v supply test conditions: v dd = +3.0v, gnd = 0v, v inh = 1.4v, v inl = 0.5v, v ctrlh =1.4v, v ctrll = 0.5v, (note 8), unless otherwise specified. (continued) parameter test conditions temp (c) min (notes 9, 10) typ (note 12) max (notes 9, 10) units isl54211
6 fn6662.1 august 25, 2008 test circuits and waveforms l ogic 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 2. audio r on test circuit figure 3. usb r on test circuit 50% t r < 20ns t f < 20ns t off 90% v inh 0v v input v inl 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 audio or usb in 50 10pf gnd v dd c ctrl v input v dd c 0v or l or r comx in gnd v l or v r v 1 r on = v 1 /40ma 40ma repeat test for all switches. ctrl float v dd c v dd d- or d+ comx in gnd v d- or v d+ v 1 r on = v 1 /i com i com repeat test for all switches. ctrl isl54211
7 fn6662.1 august 25, 2008 figure 4. capacitance test circuit figure 5. audio crosstalk test circuit figure 6a. measurement poin ts figure 6b. test circuit figure 6. skew test test circuits and waveforms (continued) v dd c gnd audio or usb comx in impedance analyzer v inl or repeat test for all switches. ctrl v inh 0v or float analyzer v dd c l or r signal generator r l gnd in comx 32 nc comx r or l repeat test for all switches. ctrl 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 com- d+ gnd v dd c d- com+ c l out- din+ din- |tro - tri| delay due to switch for ri sing 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 15.8 143 143 45 45 ctrl in v inh isl54211
8 fn6662.1 august 25, 2008 figure 7. click and pop test circuit figure 8. click and pop test circuit figure 9. click and pop test circuit #2 test circuits and waveforms (continued) v dd gnd l com- in audio precision set audio analyzer for peak detection, 32 samples/sec, aweighted filter, manual range 1x/y, units to dbv ctrl system ii cascade analyzer r com+ float 3.3v r load cha chb 0v to 1.25v dc step click and pop or 1.25v to 0v dc step r load v dd c gnd l com- in audio precision ctrl system ii cascade analyzer r com+ float r load cha chb click and pop set audio analyzer for peak detection, 32 samples/sec, aweighted filter, manual range 1x/y, units to dbv r load 3.3v 0v to v dd square wave v dd gnd l com- ctrl in r com+ 20k click and pop power supply turn-on/turn-off click and pop transient test 20k 220f 220f 0v to 3.0v dc step or dc step 3.0v to 0v 1hz 1.5v or 0v isl54211
9 fn6662.1 august 25, 2008 typical application block diagrams detailed description the isl54211 device is a dual single pole/double throw (spdt) analog switch that oper ates from a single dc power supply in the range of 2.7v to 5.0v. it was designed to function as dual 2-to-1 multiplexer to select between usb differential data signals and audio l and r stereo signals. it comes in a tiny tqfn package for use in mp3 players, pdas, cellphones, and other personal media players. the part consists of two 2.5 audio switches and two 5.5 usb switches. the audio switc hes can accept signals that swing below ground. they were designed to pass audio left and right stereo signals, that are ground referenced, with minimal distortion. the usb switches were designed to pass isl54211 usb transceiver high-speed audio com - com + in gnd d- d+ l r vdd ctrl logic control controller 4m 4m codec click and pop v bus 3.3v 200k 200k isl54211 usb transceiver high-speed audio com - com + in gnd d- d+ l r vdd ctrl logic control controller 4m 4m codec click and pop v bus 3.3v 200k 200k logic control via microprocessor logic control via v bus voltage from computer or usb hub 500k usb/headphone jack usb/headphone jack isl54211
10 fn6662.1 august 25, 2008 high-speed usb differential data signals with minimal edge and phase distortion. the isl54211 was specifically designed for mp3 players, personal media players and cellphone applications that need to combine the audio headphone jack and the usb data connector into a single shared connector, thereby saving space and component cost. see ?typical application block diagrams? on page 9 regarding functionality. the isl54211 has a single logic control pin (in) that selects between the audio and the usb switches. this pin can be driven low or high to switch between the audio codec drivers and usb transceiver of the mp3 player or cellphone. the isl54211 also contains a logic control pin (ctrl) that when driven low while in is low, opens all switches and activates the audio click and pop circuitry. a detailed description of the two types of switches are provided in the following sectio ns. in a typical application, the usb transmission and audio playback are intended to be mutually exclusive operations. audio switches the two audio switches (l, r) are 2.5 switches that can pass signals that swing below ground. crosstalk between the audio switches is <-100db over the audio band. these switches have excellent off-isolation >105db over the audio band with a 32 load. over a signal range of 1v (0.707v rms ) with v dd > 2.7v, these switches have an extremely low r on resistance variation. they can pass grou nd referenced audio signals with very low distortion (<0.06% thd+n) when delivering 15.6mw into a 32 headphone speaker load. see figures 16, 17, 18, and 19 (thd+n ?typical performance curves? beginning on page 12). the audio drivers should be connected at the l and r side of the switch (pins 5 and 6 for tqfn; pins 6 and 7 for tdfn) and the speaker loads should be connected at the com side of the switch (pins 2 and 3 for tqfn; pins 3 and 4 for tdfn). the switches have cl ick and pop circuitry on the l and r side that is activat ed when the in voltage is 0.5v or floating and the ctrl voltage to 0.5v or floating. the isl54211 should be put in this mode before powering down or powering up of the audio codec drivers. in this mode, both the audio and usb in-line switches will be off and the audio click and pop circuitry will be on. the high off-isolation of the audio s witches along with the click and pop circuitry will isolate t he transients generated during power-up and power-down of the audio codecs from getting through to the headphones, thus eliminating click and pop noise in the headphones. the audio switches are active (turned on) whenever the in voltage is 0.5v or floating and the ctrl voltage to 1.4v. usb switches the two usb switches (d+, d-) are 5.5 bidirectional switches that were specifical ly designed to pass high-speed usb differential signals typically in the range of 0v to 400mv. the switches have low capacitance and high bandwidth to pass usb high-speed signals (480mbps) with minimum edge and phase distortion to meet usb 2.0 signal quality specifications. see figure 20 for high-speed eye pattern taken with the switch in the signal path. these switches can also swing rail to rail and pass usb full-speed signals (12mbps) with minimal distortion. see figure 21 for full-speed eye pattern taken with the switch in the signal path. the maximum signal range for the usb switches is from -1.5v to v dd . the signal voltage at d- and d+ should not be allow to exceed the v dd voltage rail or go below ground by more than -1.5v. the usb switches are active (turned on) whenever the in voltage is to 1.4v. isl54211 operation the following sections discuss using the isl54211 in the ?typical application block diagrams? on page 9. vdd supply the dc power supply connected at vdd (pin 10 for tqfn, pin 1 for tdfn) provides the required bias voltage for proper switch operation. the part can operate with a supply voltage in the range of 2.7v to 5.0v. in a typical usb/audio 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 4.3v. for best possible usb full-speed ope ration (12mbps), it is recommended that the v dd voltage be 2.7v in order to get a usb data signal level above 2.7v. logic control the state of the isl54211 device is determined by the voltage at the in pin (pin 1 for tqfn; pin 2 for tdfn) and the ctrl pin (pin 9 for tqfn, pin 10 for tdfn). these logic pins are 1.8v logic compatible when v dd is in the range of 2.7v to 3.6v and can be controlled by a standard processor. the part has three states or modes of operation: audio mode; usb mode; and mute mode. refer to ?truth table? on page 2. the in pin and ctrl pin are internally pulled low through 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?. logic control voltage levels in = logic ?0? (low) when 0.5v or floating. in = logic ?1? (high) when 1.4v isl54211
11 fn6662.1 august 25, 2008 ctrl = logic ?0? (low) when 0.5v or floating. ctrl = logic ?1? (high) when 1.4v audio mode if the in pin = logic ?0? and ctrl pin = logic ?1? the part will be in the audio mode. in audio mode the l (left) and r (right) 2.5 audio switches are on, the d- and d+ 5.5 switches are off (high impedance) and the audio click and pop circuitry is off (high impedance). when nothing is plugged into the common connector or a headphone is plugged into the common connector, the processor will sense that there is no voltage at the vbus pin of the connector and will drive and hold the in control pin of the isl54211 low. as long as the ctrl = logic ?1?, the isl54211 part remains in the audio mode and the audio drivers of the player can dr ive the headphones and play music. usb mode if the in pin = logic ?1? and ctrl pin = logic ?0? or logic ?1?, the part will go into usb mode. in usb mode the d- and d+ 5.5 switches are on and the l and r 2.5 audio switches are off (high impedance). when a usb cable from a computer or usb hub is connected at the common conn ector, the processor will sense the presence of the 5v v bus voltage and drive the in pin voltage high. the isl54211 part will go into the usb mode. in usb mode the computer or usb hub transceiver and the mp3 player or cellphone usb transceiver are connected and digital data will be able to be transmit back and forth. when the usb cable is disconnected, the processor will sense that the 5v v bus voltage is no longer connected and will drive the in pin low and put the part back into the audio or mute mode. mute mode if the in pin = logic ?0? and ctrl pin = logic ?0?, the part will be in the mute mode. in the mute mode, the audio switches and the usb switc hes are off (high impedance) and the audio click and pop circuitry is on. before powering down or powering up of the audio codecs drivers, the isl54211 should be put in the mute mode. in mute mode, transients present at the l and r signal pins due to the changing dc voltage of the audio drivers will not pass to the headphones, preventing clicks and pops in the headphones. before power-up and power-down of the isl54211, part the in and ctrl control pins should be driven to ground or tri-stated. this will put the switch in the mute state, which turns all switches off and activates the click and pop circuitry. this will minimize transients at the speaker loads during power-up and power-down. see figure 30 in the ?typical performance curves? on page 17. ac-coupled click a nd pop operation single supply audio drivers have their signal biased at a dc offset voltage, usually at 1/ 2 the dc supply voltage of the driver. as this dc bias voltage comes up or goes down during power-up or power-down of the driver, a transient can be coupled into the speaker load through the dc blocking capacitor (see ?typical application block diagrams? on page 9). when a driver is off and suddenly turned on, the rapidly changing dc bias voltage at the output of the driver will cause an equal voltage at the in put side of the switch due to the fact that the voltage across the blocking capacitor cannot change instantly. if the switch is in the audio mode or there is no low impedance path to discharge the blocking capacitor voltage at the input of the switch, before turning on the audio switch, a transient discharge will occur in the speaker, generating a click/pop noise. proper elimination of a click/ pop transient at the speaker loads while powering up or down of the audio drivers requires that the isl54211 have its click/pop circuitry activated by putting the part in the mute mode. this allows the transients generated by the audio drivers to be discharged through the click and pop shunt circuitry. once the driver dc bias has reached v dd /2 and the transient on the switch side of the dc blocking capacitor has been discharged to ground through the click/pop shunt circuitry, the audio switches can be turned on and connected through to the spea ker loads without generating any undesirable click/pop noise in the speakers. with a typical dc blocking capacitor of 220f and the click/pop shunt circuitry designed to have a resistance of 20 to 70 , allowing a 100ms wait time to discharge the transient before placing the switch in the audio mode will prevent the transient from ge tting through to the speaker load. see figures 28 and 29 in the ?typical performance curves? page 16. using the computer v bus voltage to drive the ?in? pin rather than using a micro-proc essor to control the in logic pin, one can directly drive the in pin using the v bus voltage from the computer or usb hub. see the ?typical application block diagrams? on page 9. when a headphone or nothing is connected at the common connector, the internal 4m pull-down will pull the in pin low, putting the isl54211 in the audio or mute 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 isl54211
12 fn6662.1 august 25, 2008 pull-down resistor and return to the audio or mute mode, depending on the condition of the ctrl pin. note: the isl54211 contains an internal diode between the in pin and vdd pin. whenever t he in voltage is greater than the v dd voltage by more than 0.7v, current will flow through this diode into the v dd power supply bus. an external series resistor in the range of 100k to 500k is required at the in logic pin to limit the current when driving it with the v bus voltage. this allows the v bus 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. a 500k resistor will limit the current to 3a to 5a and still allow the in logic voltage to go to around 3v, which is will above the required v in h level of 1.4v. a smaller series resistor can be used but more current will flow. typical performance curves t a = +25c, unless otherwise specified figure 10. audio on-resistance vs supply voltage vs switch voltage figure 11. audio on-resistance vs supply voltage vs switch voltage figure 12. audio on-resistance vs switch voltage vs temperature figure 13. audio on-resistance vs switch voltage vs temperature r on ( ) v com (v) 2.50 2.55 2.60 2.65 2.70 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 v dd = 3.3v i com = 40ma v dd = 3.0v v dd = 3.6v v dd = 5.0v v dd = 4.3v r on ( ) v com (v) 2.0 2.4 2.8 3.2 3.6 4.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 v dd = 2.5v v dd = 2.7v v dd = 5.0v v dd = 3.6v i com = 40ma v com (v) 1 2 3 4 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 +85c +25c -40c i com = 40ma v dd = 3.0v r on ( ) r on ( ) v com (v) -40c +25c 0 5.0 10 15 20 25 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 +85c v dd = 3.0v i com = 40ma isl54211
13 fn6662.1 august 25, 2008 figure 14. usb on-resistance vs supply voltage vs switch voltage figure 15. usb on-resistance vs switch voltage vs temperature figure 16. thd+n vs supply voltage vs frequency figure 17. thd+n vs signal levels vs frequency figure 18. thd+n vs output voltage figure 19. thd+n vs output power typical performance curves t a = +25c, unless otherwise specified (continued) 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 0 0.1 0.2 0.3 0.4 r on ( ) v com (v) i com = 40ma v dd = 2.7v v dd = 3.3v v dd = 3.6v v dd = 4.3v v dd = 5v 1 2 3 4 5 6 7 0 0.1 0.2 0.3 0.4 r on ( ) v com (v) +85c -40c i com = 40ma +25c v dd = 3.3v thd+n (%) frequency (hz) 20 200 2k 20k 0.052 0.054 0.058 r load = 32 v load = 0.707v rms v dd = 2.7v v dd = 3.0v v dd = 3.3v v dd = 3.6v 0.056 thd+n (%) frequency (hz) 20 200 2k 20k 0.02 0.04 0.06 0.08 3v p-p 2.5v p-p 2v p-p 1v p-p r load = 32 v dd = 3v peak-to-peak voltages at load 510mv p-p thd+n (%) output voltage (v p-p ) 0.6 0.9 1.2 1.5 1.8 2.1 0 0.02 0.04 0.06 0.08 0.10 0.3 2.3 0.12 0.14 2.6 2.9 r load = 32 freq = 1khz v dd = 3v thd+n (%) output power (mw) 0.30 0.02 0 5 10 20 25 30 r load = 32 freq = 1khz v dd = 3v 0.04 0.06 0.08 0.10 0.20 15 isl54211
14 fn6662.1 august 25, 2008 figure 20. eye pattern: 480mbps with usb switches in the signal path typical performance curves t a = +25c, unless otherwise specified (continued) time scale (0.2ns/div) voltage scale (0.1v/div) isl54211
15 fn6662.1 august 25, 2008 figure 21. eye pattern: 12mbps usb signal with usb switches in the signal path figure 22. off-isolation audio switches vs loading figure 23. audio channel-to-channel crosstalk typical performance curves t a = +25c, unless otherwise specified (continued) time scale (10ns/div) voltage scale (0.5v/div) v dd = 3.3v off- isolation (db) -120 -40 -115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 -50 -45 20 20k 50 100 200 500 1k 2k 5k 10k r l = 32 r l = 1k r l = 10k v dd = 3.3v vsignal = 0.707v rms frequency (hz) -120 -60 -115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 20 20k 50 100 200 500 1k 2k 5k 10k frequency (hz) crosstalk (db) v dd = 3v r load = 32 vsignal = 0.707v rms l to r r to l isl54211
16 fn6662.1 august 25, 2008 figure 24. channel-to-channel crosstalk figure 25. off-isolation usb switches figure 26. off-isolation audio switches figure 27. frequency response figure 28. 32 ac-coupled click/pop reduction figure 29. 1k ac-coupled click/pop reduction typical performance curves t a = +25c, unless otherwise specified (continued) -180 -60 -170 -160 -150 -140 -130 -120 -110 -100 -90 -80 -70 20 100k 50 100 200 500 1k 2k 5k 10k 20k 50k frequency (hz) crosstalk (db) v dd = 3v r load = 50 vsignal = 0.707v rms audio to usb usb to audio frequency (hz) normalized gain (db) -140 -120 -100 -80 -60 -40 -20 0 0.001 0.01 0.1 1m 10m 100m 500m v in = 0.2v p-p to 2v p-p r l = 50 frequency (hz) normalized gain (db) -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 0.001 0.01 0.1 1m 10m 100m 500m v in = 0.2v p-p to 2v p-p r l = 50 frequency (hz) 0 -1 normalized gain (db) 1m 10m 100m 1g -2 -3 -4 1 usb switch r l = 50 v signal = 0.2v p-p to 2v p-p time (s) 100ms/div voltage (v) mute 2v/div l in 200mv/div l out 50mv/div vdd/2 2v/div time (s) 100ms/div voltage (v) mute 2v/div l in 200mv/div l out 50mv/div vdd/2 2v/div isl54211
17 fn6662.1 august 25, 2008 figure 30. power-up/power-down click and pop transient die characteristics substrate potential (powered up): gnd transistor count: 98 process: submicron cmos typical performance curves t a = +25c, unless otherwise specified (continued) time (s) 200ms/div voltage (v) v dd 1v/div v out 10mv/div in = ctrl = 0v v in = 1.5v or 0v isl54211
18 fn6662.1 august 25, 2008 thin dual flat no-lead 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. isl54211
19 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 fn6662.1 august 25, 2008 isl54211 ultra thin quad flat no-lead plastic package (utqfn) 6 b e a d 0.10 c 2x c 0.05 c a 0.10 c a1 seating plane index area 2 1 n top view side view nx (b) section "c-c" e cc 5 c l terminal tip (a1) l 0.10 c 2x l1 e nx l bottom view 5 7 2 1 pin #1 id (datum a) (datum b) 0.10 m c a b 0.05 m c nx b 10x 5 0.50 0.20 0.40 1.80 0.40 0.20 2.20 1.00 0.60 1.00 land pattern 10 l10.1.8x1.4a 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 1.75 1.80 1.85 - e 1.35 1.40 1.45 - e 0.40 bsc - l 0.35 0.40 0.45 - l1 0.45 0.50 0.55 - n102 nd 2 3 ne 3 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. jedec reference mo-255. 10. for additional information, to assist with the pcb land pattern design effort, see intersil technical brief tb389.

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