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1 ? fn6815.0 ISL54215 mp3/usb 2.0 high speed switch with negative signal handling and low power shutdown the intersil ISL54215 dual spdt (single pole/double throw) switch combines low distortion audio and accurate usb 2.0 high speed data (480mbps) signal switching in the same low voltage device. when operated with a 2.5v to 5.0v single supply, this analog switch allows audio signal swings below ground, allowing for the use of a common usb and audio headphone connector in personal media players and other portable battery powered devices. the ISL54215 logic control pins are 1.8v compatible, which allows for control via a standard microcontroller. the ISL54215 has an audio enable control pin to open all switches and put the part in a low power state. in this state, the device draws typically 1na of current. the ISL54215 is available in a small 10 ld 2.1mmx1.6mm ultra-thin tqfn package. it operates over a temperature range of -40c 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 ? low power shutdown state ? low distortion headphone audio signals - thd+n at 1mw into 32 load . . . . . . . . . . . . <0.013% ? crosstalk (100khz) . . . . . . . . . . . . . . . . . . . . . . . . . -95db ? off-isolation (100khz) . . . . . . . . . . . . . . . . . . . . . . 95db ? single supply operation (v dd ) . . . . . . . . . . . . 2.5v to 5.0v ? -3db bandwidth usb switch . . . . . . . . . . . . . . . . . 736mhz ? available in tqfn package ? 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 ?pdas ? audio/usb switching application block diagram ISL54215 usb transceiver high-speed audio usb/headphone jack com - com + in gnd d- d+ r l vdd ctrl logic control controller 4m codec v bus 3.3v 4m data sheet november 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 november 25, 2008 pinouts (note 1) ISL54215 (10 ld 2.1mmx1.6mm tqfn) top view note: 1. ISL54215 switches shown for in = logic ?0? and ctrl = logic ?1?. 1 3 4 d- com - l in ctrl 2 10 5 7 8 d+ com + r gnd 9 6 vdd logic control 4m 4m truth table ISL54215 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 pin number name function 1 vdd power supply 2 in digital control input 3 com- voice and data common pin 4 com+ voice and data common pin 5 gnd ground connection 6 r audio right input 7 l audio left input 8 d+ usb differential input 9 d- usb differential input 10 ctrl digital control input (audio enable) ordering information part number (note 2) part marking temp. range (c) package (pb-free) pkg. dwg. # ISL54215iruz-t* gr -40 to +85 10 ld tqfn l10.2.1x1.6a *please refer to tb347 for deta ils on reel specifications. 2. these intersil pb-free plastic packaged products employ special pb- free material sets; molding compounds/die attach materials and nipdau plate - e4 termination fi nish, which is rohs compliant and compatible with both snpb and pb-free soldering operations. intersil pb-free products are msl cl assified at pb-free peak reflow temperatures that meet or exceed the pb-free requirements of ipc/jedec j std-020. ISL54215
3 november 25, 2008 absolute maximum ratings thermal information v dd to gnd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3v to 5.5v input voltages d+, d- (note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 2v to 5.5v l, r (note 3) . . . . . . . . . . . . . . . . . . . . . . . - 2v to ((v dd ) + 0.3v) in, ctrl (note 3) . . . . . . . . . . . . . . . . . . -0.3v to ((v dd ) + 0.3v) output voltages com-, com+ (note 3) . . . . . . . . . . . . . . . . . . . . . . . . -2v to 5.5v 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 ratings human body model, i/0 to gnd . . . . . . . . . . . . . . . . . . . . . . >4kv human body model, all other pins. . . . . . . . . . . . . . . . . . .>3.5kv human body model, v dd to gnd. . . . . . . . . . . . . . . . . . . . >11kv machine model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >250v charged device model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >2kv thermal resistance (t ypical, notes 4, 5) ja (c/w) jc (c/w) 10 ld 2.1mmx1.6mm tqfn package 154 48.3 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: 3. signals on d+, d-, l, r, com-, com+, ctrl and in exceeding v dd or gnd by specified amount are clam ped. limit current to maximum current ratings. 4. 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. 5. 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 = v ctrlh = 1.4v, v inl = v ctrll = 0.5v, (note 6), unless otherwise specified. parameter test conditions temp (c) min (notes 7, 8) typ max (notes 7, 8) units analog switch characteristics audio switches (l, r) analog signal range, v analog v dd = 3.3v, 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 = 40ma, v l or v r = -0.85v to 0.85v (figure 3, note 10) 25 - 2.5 2.8 full - - 3.4 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 (notes 10, 11) 25 - 0.09 0.25 full - - 0.26 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 (notes 9, 10) 25 - 0.02 0.05 full - - 0.07 on-resistance, r on v dd = 5.0v, in = 0v, ctrl = v dd , i comx = 40ma, v l or v r = -0.85v to 0.85v (figure 3) 25 - 2.3 - on-resistance, r on v dd = 4.2v, in = 0v, ctrl = v dd , i comx = 40ma, v l or v r = -0.85v to 0.85v (figure 3) 25 - 2.35 - on-resistance, r on v dd = 2.85v, in = 0v, ctrl = v dd , i comx = 40ma, v l or v r = -0.85v to 0.85v (figure 3) 25 - 2.72 - usb switches (d+, d-) analog signal range, v analog v dd = 2.7v to 3.6v, in = 1.4v, ctrl = 1.4v full 0 - v dd v on-resistance, r on (high-speed) v dd = 3.3v, in = 1.4v, ctrl = 1.4v, i comx = 40ma, v d+ or v d- = 0v to 400mv (figure 4, note 10) 25 - 5 6.5 full - - 7 ISL54215
4 november 25, 2008 r on matching between channels, r on (high-speed) v dd = 3.3v, in = 1.4v, ctrl = 1.4v, i comx = 40ma, v d+ or v d- = voltage at max r on (notes 10, 11) 25 - 0.05 0.25 full - - 0.55 r on flatness, r flat(on) (high-speed) v dd = 3.3v, in = 1.4v, ctrl = 1.4v, i comx = 40ma, v d+ or v d- = 0v to 400mv (notes 9, 10) 25 - 0.45 0.55 full - - 1.0 on-resistance, r on (full-speed) v dd = 3.3v, in = 1.4v, ctrl = 1.4v, i comx = 1ma, v d+ or v d- = 3.3v (figure 4, note 10) 25 - 25 30 full - - 35 on-resistance, r on v dd = 5.0v, in = v dd , ctrl = v dd , i comx = 1ma, v d+ or v d- = 5v (figure 4) 25 - 20 - on-resistance, r on v dd = 4.2v, in = v dd , ctrl = v dd , i comx = 1ma, v d+ or v d- = 4.2v (figure 4) 25 - 22 - on-resistance, r on v dd = 2.85v, in = v dd , ctrl = v dd , i comx = 1ma, v d+ or v d- = 2.85v (figure 4) 25 - 28 - 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 -5 0.5 5 na full -60 - 60 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 25 -10 2 10 na full -70 - 70 na dynamic characteristics usb turn-on time, t on v dd = 3.0v, r l = 50 , c l = 10pf (figure 1) 25 - 30 - ns usb turn-off time, t off v dd = 3.0v, r l = 50 , c l = 10pf (figure 1) 25 - 20 - ns audio turn-on time, t on v dd = 3.0v, r l = 50 , c l = 10pf (figure 1) 25 - 2.5 - s audio turn-off time, t off v dd = 3.0v, r l = 50 , c l = 10pf (figure 1) 25 - 30 - ns break-before-make time delay, t d v dd = 3.0v, r l = 50 , c l = 10pf (figure 2) 25 - 13 - ns skew, (t skewout - t skewin) v dd = 3.0v, in = 3v, ctrl = 3v, r l = 45 , c l = 10pf, t r = t f = 720ps at 480mbps, (duty cycle = 50%) (figure 7) 25 - 50 - ps total jitter, t j v dd =3.0v, in = 3v, ctrl = 3v, r l = 45 , c l = 10pf, t r = t f = 750ps at 480mbps 25 - 210 - ps propagation delay, t pd v dd = 3.0v, in = 3v, ctrl = 3v, r l = 45 , c l = 10pf ( figure 7) 25 - 250 - ps audio crosstalk r to com-, l to com+ v dd = 3.0v, in = 0v, ctrl = 3.0v, r l = 32 , f = 20hz to 20khz, v r or v l = 0.707v rms (2v p-p ) (figure 6) 25 - -100 - db crosstalk (audio to usb, usb to audio) v dd = 3.0v, r l = 50 , f = 100khz (figure 6) 25 - -95 - db off-isolation v dd = 3.0v, r l = 50 , f = 100khz 25 - 95 - db off-isolation v dd = 3.0v, r l = 32 , f = 20hz to 20khz 25 - 115 - db total harmonic distortion f = 20hz to 20khz, v dd = 3.0v, in = 0v, ctrl = 3.0v, v l or v r = 180mv rms (509mv p-p ), r l = 32 25 - 0.013 - % total harmonic distortion f = 20hz to 20khz, v dd = 3.0v, in = 0v, ctrl = 3.0v, v l or v r = 0.707v rms (2v p-p ), r l = 32 25 - 0.05 - % usb switch -3db bandwidth signal = 0dbm, 0.2v dc offset, r l = 50 , c l = 5pf 25 - 736 - mhz d+/d- off-capacitance, c dxoff f = 1mhz, v dd = 3.0v, in = 0v, ctrl = 3.0v, v d- or v d+ = v comx = 0v (figure 5) 25 - 3 - pf l/r off-capacitance, c loff , c roff f = 1mhz, v dd = 3.0v, in = 3.0v, ctrl = 0v or 3v, v l or v r = v comx = 0v (figure 5) 25 - 5 - pf electrical specifications - 2.7v to 3.6v supply te s t c o n d i t i o n s : v dd = +3.0v, gnd = 0v, v inh = v ctrlh = 1.4v, v inl = v ctrll = 0.5v, (note 6), unless otherwise specified. (continued) parameter test conditions temp (c) min (notes 7, 8) typ max (notes 7, 8) units ISL54215
5 november 25, 2008 com on-capacitance, c comx(on) f = 1mhz, v dd = 3.0v, in = 3.0v, ctrl = 0v or 3v, v d- or v d+ = v comx = 0v (figure 5) 25 - 7 - pf power supply characteristics power supply range, v dd full 2.5 5.0 v positive supply current, i dd v dd = 3.6v, in = 0v or 3.6v, ctrl = 3.6v 25 - 7 13 a full - - 15 a positive supply current, i dd (low power state) v dd = 3.6v, in = 0v, ctrl = 0v or float 25 - 1 10 na full - - 150 na power off-current, i dx i comx v dd = 0v, v dx = v comx = 5.25v, in = ctrl = float 25 - 7 - a 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 = 3.6, ctrl = 0v full -2 0.9 2 a input current, i ctrlh v dd = 3.6v, in = 0v, ctrl = 3.6v full -2 0.9 2 a ctrl pull-down resistor, r ctrl v dd = 3.6v, in = 0v, ctrl = 3.6v; measure current through the internal pull-down resistor a nd calculate resistance value. full - 4 - m in pull-down resistor, r in v dd = 3.6v, in = 3.6v, ctrl = 3.6v; measure current through the internal pull-down resistor and calculate resistance value. full - 4 - m notes: 6. v logic = input voltage to perform proper function. 7. the algebraic convention, whereby the most negative value is a minimum and the most posi tive a maximum, is used in this data sheet. 8. parameters with min and/or max limits are 100% tested at +25c, unless otherwise specified. te mperature limits established by characterization and are not production tested. 9. flatness is defined as the difference between maximum and minimu m value of on-resistance over the specified analog signal ran ge. 10. limits established by characte rization and are not production tested. 11. r on matching between channels is calc ulated by subtracting 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 te s t c o n d i t i o n s : v dd = +3.0v, gnd = 0v, v inh = v ctrlh = 1.4v, v inl = v ctrll = 0.5v, (note 6), unless otherwise specified. (continued) parameter test conditions temp (c) min (notes 7, 8) typ max (notes 7, 8) units ISL54215
6 november 25, 2008 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 figure 3. audio r on test circuit figure 4. 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 90% v inh v inl t d logic input switch output 0v v out v in in comx r l c l v out 10pf 50 d- or d+ l or r v dd gnd v input c ctrl v dd c 0v or float 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 v dd c v dd d- or d+ comx in gnd v d- or v d+ v 1 r on = v 1 /40ma 40ma repeat test for all switches. ctrl ISL54215
7 november 25, 2008 figure 5. capacitance test circuit figure 6. audio crosstalk test circuit figure 7a. measurement points figure 7b. test circuit figure 7. skew test test circuits and waveforms (continued) v dd c gnd audio or usb comx in impedance analyzer 0v or v dd repeat test for all switches. ctrl 0v analyzer v dd c l or r signal generator r l gnd in comx 32 nc comx r or l signal direction through switch is reversed, worst case values are recorded. 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 rising input and rising output signals. |tfo - tfi| delay due to switch for fa lling input and falli ng 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 dd ISL54215
8 november 25, 2008 detailed description the ISL54215 device is a dual single pole/double throw (spdt) analog switch that oper ates from a single dc power supply in the range of 2.5v to 5.0v. it was designed to function as a dual 2 to 1 multiplexer to select between usb differential data signals and audio l and r stereo signals. it comes in tiny tqfn package for use in mp3 players, pdas, cellular phones and other personal media players. the part consists of two 2.5 audio switches and two 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 high-speed usb differential data signals with minimal edge and phase distortion. the ISL54215 was specifically designed for mp3 players, personal media players and ce llular phone applications that need to combine the audio headphone jack and the usb typical application block diagrams figure 8. logic control via microprocessor figure 9. logic control via v bus voltage from computer or usb hub ISL54215 usb transceiver high-speed audio usb/headphone jack com - com + in gnd d- d+ r l vdd ctrl logic control controller 4m codec v bus 3.3v 4m ISL54215 usb transceiver high-speed audio usb/headphone jack com - com + in gnd d- d+ r l vdd ctrl logic control controller 4m codec v bus 3.3v 4m 500k ISL54215
9 november 25, 2008 data connector into a single shared connector, thereby saving space and component cost. ?typical application block diagrams? on page 8 of this functionality are shown in figures 8 and 9. the ISL54215 has a single logic control pin (in) that selects between the audio switches 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 cellular phone. the ISL54215 also contains a logic control pin (ctrl) that when driven low while in is low, opens all switches and puts the part in to a low power state, drawing typically 1na of i dd current. detailed descriptions of the two types of switches are provided in the following sections. audio switches the two audio switches (l, r) are 2.5 switches that can pass signals that swing below ground by as much as 1.5v. they were designed to pass ground reference stereo signals with minimal insertion loss and very low distortion over a 1v signal range. crosstalk between the audio channels is -100db over the audio band. crosstalk between the audio channel and usb channel is -95db at 100khz. these switches have excellent off-isolation, 115db, 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 ground referenced audio signals with very low distortion (<0.05% thd+n) when delivering 15.6mw into a 32 headphone speaker load. see figures 10 through 13 for thd+n performance curves. these switches are bi-directional switches. in typical applications, the audio drivers would be connected at the l and r side of the switch (pins 6 and 7) and the speaker loads would be connected at the com side of the switch (pins 3 and 4). 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 bidirectional switches that can pass rail-to-rail signals. when powered with a 3.3v supply, these switches have a nominal r on of 5 over the signal range of 0v to 400mv with a r on flatness of 0.45 . the r on matching between the d+ an d d- switches over this signal range is only 0.05 ensuring minimal impact by the switches to usb high speed signal transitions. as the signal level increases, the r on resistance increases. at a signal level of 3.3v, the switch resistance is nominally 25 . the usb switches were specifically designed to pass usb 2.0 high-speed (480mbps) differen tial signals typically in the range of 0v to 400mv. they have low capacitance and high bandwidth to pass the usb high-speed signals with minimum edge and phase distortion to meet usb 2.0 high speed signal quality specifications. see figure 14. the usb switches can also pass usb full-speed signals (12mbps) with minimal distortion and meet all the usb requirements for usb 2.0 full-speed signaling. see figure 15 for full-speed eye pattern taken wit h 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 allowed 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. ISL54215 operation the following will discuss using the ISL54215 in the ?typical application block diagrams? on page 8 shown in figures 8 and 9. v dd supply the dc power supply connected at vdd (pin 1) provides the required bias voltage for proper s witch operation. the part can operate with a supply voltage in the range of 2.5v 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 3.6v. for best possible usb full-speed ope ration (12mbps), it is recommended that the v dd voltage be 2.5v in order to get a usb data signal level above 2.5v. logic control the state of the ISL54215 device is determined by the voltage at the in pin (pin 2) and the ctrl pin (pin 10). 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 microprocessor. the part has three states or modes of operation. the audio mode, usb mode and the low power mode. refer to the ?truth table? on page 2. the in and ctrl pins are internally pulled low through a 4m resistor 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 v in 0.5v or floating. in = logic ?1? (high) when v in 1.4v 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 and the d- and d+ 5 switches are off (high impedance). ISL54215
10 november 25, 2008 when nothing is plugged into the common connector or a headphone is plugged into the common connector, the microprocessor will sense that there is no voltage at the v bus pin of the connector and will drive and hold the in control pin of the ISL54215 low. as long as ctrl = logic ?1,? the ISL54215 part will be in the audio mode and the audio drivers of the media player can drive the headphones and play music. usb mode if the in pin = logic ?1? and the ctrl pin = logic ?0? or logic ?1?, the part will go into usb mode. in usb mode, the d- and d+ 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 and drive the in pin voltage high. the ISL54215 part will go into the usb mode. in usb mode, the computer or usb hub transceiver and the mp3 player or cell phone 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 v bus voltage is no longer connected and will drive the in pin low and put the part back into the audio 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 audio switches and the usb switches are off (high impedance). in this state, the device draws typically 1na of current. in low power mode, the off-isolation and crosstalk between switch cells is minimal for negative swinging signals. care should be taken to avoid negative swinging signals in this mode of operatio n. in typical applications, the low power state will be applied to the ISL54215 part when the portable media player is in its sleep or hibernate mode to conserve battery power. in the sleep mode, no audio or usb signals are applied to the part. using the computer v bus voltage to drive the ?in? pin rather than using a microprocessor to control the in logic pin, one can directly drive the in pin using the 5v v bus voltage from the computer or usb hub. see the application block diagram, figure 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 ISL54215 in the audio 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 or low power mode, depending on the condition of the ctrl pin. note: the ISL54215 contains an internal diode between the in pin and vdd pin. whenever the 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 2.5v to 3.6v. a 500k resistor will limit the current to 2.76a and still allow the in logic voltage to go to around 3.67v, 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. ISL54215
11 november 25, 2008 typical performance curves t a = +25c, unless otherwise specified. figure 10. thd+n vs supply voltage vs frequency fi gure 11. thd+n vs supply voltage vs frequency figure 12. thd+n vs si gnal levels vs frequency figure 13. thd+n vs output voltage thd+n (%) frequency (hz) 0.010 0.020 0.011 0.012 0.013 0.014 0.015 0.016 0.017 0.018 0.019 20 20k 50 100 200 500 1k 2k 5k 10k v dd = 2.7v v dd = 2.6v v dd = 3v v dd = 3.6v v dd = 5v r load = 32 p load = 1mw rms 0.040 0.080 0.045 0.050 0.055 0.060 0.065 0.070 0.075 20 20k 50 100 200 500 1k 2k 5k 10k thd+n (%) frequency (hz) r load = 32 v load = 0.707v rms v dd = 2.6v v dd = 2.7v v dd = 3v v dd = 3.6v v dd = 5v 0.02 0.11 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 20 20k 50 100 200 500 1k 2k 5k 10k thd+n (%) frequency (hz) r load = 32 v dd = 3v 3v p-p 2.5v p-p 2v p-p 1v p-p 0.01 0.10 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.5 3.0 1.0 1.5 2.0 2.5 v dd = 3v thd+n (%) output voltage (v p-p ) r load = 32 freq = 1khz ISL54215
12 november 25, 2008 figure 14. 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) ISL54215
13 november 25, 2008 figure 15. eye pattern: 12mbps usb signal with usb switches in the signal path figure 16. frequency response figure 17. off-isolation usb switches typical performance curves t a = +25c, unless otherwise specified. (continued) time scale (10ns/div) voltage scale (0.5v/div.) v dd = 3.3v 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 frequency (hz) -60 normalized gain (db) 0.01m 0.1m 1m 500m -80 -40 -100 -120 0 -20 10m 0.001m 100m v signal = 0.2v p-p to 2v p-p r l = 50 v dcoffset = 1.5v dc ISL54215
14 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 november 25, 2008 figure 18. off-isolation audio switches die characteristics substrate potential (powered up): gnd transistor count: 98 process: submicron cmos typical performance curves t a = +25c, unless otherwise specified. (continued) frequency (hz) -60 normalized gain (db) 0.01m 0.1m 1m 500m -80 -40 -100 -120 0 -20 10m 0.001m 100m v signal = 0.2v p-p to 2v p-p r l = 50 ISL54215
15 november 25, 2008 ISL54215 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

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