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november 2012 ? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev.1.0.3 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability fsa801 ? usb2.0 high-speed (480 mbps), uart, and audio switch with negative signal capability features ? 3:1 switch handles: - audio headsets - uart - up to two high- and low-speed usb data ? usb charger detection and indication, compliant with usb battery charging specification, rev 1.1 - supports data contact detect (dcd) ? negative-swing-capable audio channel ? built-in termination resistors for audio pop reduction ? simple switch control using three select pins ? 28 v over-voltage tolerance on v bus applications ? cell phones, mp3 players, pdas description the fsa801 is a 3:1 usb accessory switch that enables usb data, stereo and m ono audio, microphone, and uart data to share a common connector port. two ports are designed for high-speed usb 2.0 signaling, while also capable of full-speed usb and uart communication. the architecture allows audio signals to swing below ground so a common usb and headphone jack can be used for personal media players and portable peripheral devices. fsa801 detects wall charger s through a dedicated pin that provides the baseband with charger detection. the charger function is compliant with usb battery charging specification, rev 1.1, implementing data contact detect (dcd) before detecting a charger . the fsa801 indicates if a dedicated charging po rt (dcp) or a charging downstream port (cdp) has been connected. the fsa801 meets both usb rev. 2.0 and micro-usb specifications. ordering information part number operating temperature range top mark package FSA801UMX -40 to +85c kl 16-lead quad, 1.8 x 2.6 mm ultrathin molded leadless package (umlp) figure 1. typical application
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev. 1.0.3 2 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability functional description the fsa801 usb2.0 accessory switch is designed to consolidate wired accessories for portable devices, such as cellular telephones and portable audio players. the benefits of consolidati on include reduced space requirements from a reducti on of connectors and their size. the micro-usb connector, for example, reduces connector height and depth, allowing for slimmer overall designs. using the usb industry standard and a common connector type for accessories such as chargers and headsets, greatly r educes the waste associated with new phone purchases by allowing re-use of the accessories. using just five wires for all connection types considerably reduces the cost of wired accessories and simplifies their constructi on. the fsa801 facilitates adopting this methodology bec ause it is designed to redirect the dp/dm pins from the usb connector to one of three ports at the bas eband?s discretion. additional flexibility is provided by t he ability of the microphone line to be switched from either the dp_con or vbus pin. the vbus pin is protect ed up to 28 v without damage to the fsa801. usb charger detection / data contact detect the fsa801 senses the pres ence of usb chargers per the usb battery charging spec ification, version 1.1 . this specification uses v bus status and measurements on dp_con / dm_con pins to determine that a charging device might be attached. the ?cd_n? pin goes to a low state, indicating t he presence of a charger. the charger-detect algorit hm executes when v bus is valid. the charger-detection algorit hm detects both dedicated charging ports (dcp) and c harging downstream ports (cdp). in this implementation, per the usb battery charging specification, version 1.1 , the fsa801 implements data contact detect (dcd) to insu re the d+ and d- pins have made contact before the dedica ted charger detection is performed. since the bc1.1 charger det ection algorithm applies and detects signals on the d+ and d- lines, any additional loading effects from portabl e device host side of the switch would cause the results to be invalid. to prevent interference due to any loading, the fsa801 only performs charger detection w hen all switches are open. additionally, if all switches are open and v bus is present, the fsa801 does not close any switch path until the dcd circuitry detects contact with the d+/d- pins and the charger detection is complete. if the d+/d- pins never contact, but v bus is present, the usb switches cannot be closed when configuring from sel[2:0]=?000? to sel[2:0]=?001? or sel[2:0 ]=?010?. to override this blocking, first switch to a non-usb mode (one of the audio modes, sel[2:0]=?011?,?100? or ?101?), and then to the desired usb mode. if the usb physical layer device that the fsa801 is connected to also performs dcd, it should not start until after the fsa801 has time to finish its detection function (since the delay between vbus connection and d+/d- connection is not defined, th is detection function time cannot be defined either). glitches on vbus that occur when v bus is not driven (positive voltage spikes and on-off situations at the beginning of a cable attach) ar e automatically filtered by the dcd state machine timing. to manually reset the fsa801 to search for a charger again, switch to sel[2:0]=?111? for a minimum of 30 s. after this state machine is reset, the next time that sel[2:0]=?000? (all switches open) for a minimum of 30 s, the fsa801 begins the charger detection sequence. please note : the fsa801 is guaranteed to operate down to 2.4 v. if the fsa801 v cc is connected directly to a battery and falls below 2.4 v, the fsa801 may not correctly detect a charger. if a charger is applied, the v cc should start to rise above 2.4 v. in this situation, the fsa801 does not automatica lly check for a charger again, so the fsa801 should be placed in sel[2:0]=?111? for 30 s (min. ), then sel[2:0]=?000? for 30 s (min.) to perform the charger detection again. applications with multiple usb controllers when operating with two usb controllers, it is recommended to configure the switches to open before switching to the other (s econd) usb interface. the open setting duration should be long enough for the accessory to go to a se0 state, so when the switch is set to the other (second) usb port, the new controller re-enumerates.
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev. 1.0.3 3 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability mode descriptions the fsa801 has three select pins to control the switching operations, sel[0], sel[1], and sel[2] described in table 1. table 1. selection truth table sel[2] sel[1] sel[0] switch action description 0 0 0 open open all switch paths (device in low-power mode) 0 0 1 usb1, uart closes usb1 path to d+/d-, default condition (1) - dp_con connected to dp_host1 - dm_con connected to dm_host1 0 1 0 usb2, uart closes usb2 path to d+/d- - dp_con connected to dp_host2 - dm_con connected to dm_host2 0 1 1 audio closes audio path to d+/d- only, no microphone switched - dp_con connected to r_host - dm_con connected to l_host 1 0 0 mono audio with mic on d+ (2) closes audio path to dm_con and microphone on dp_con pin. this is a mono-audio application. - dp_con connected to mic - dm_con connected to l_host 1 0 1 stereo audio with mic on vbus (2) closes audio path to d+/d- and microphone on v bus pin. this mode is typically used for stereo headset with microphone. - dp_con connected to r_host - dm_con connected to l_host - v bus connected to mic 1 1 0 undefined reserved; do not use. 1 1 1 charger detection reset charger detection reset. selecting this mode for greater than 30 s resets the fsa801 to check for a charger, the next time a sel[2:0] state of ?000? is applied for more than 30 s. notes: 1. the select pins are cmos inputs and should not be left in a floating condition. some applications require the uart path be in the closed position on power-up for initial programming of the device under test. if that condition is desired, the three select pins should be pulled to the correct levels with external resistors that should exceed 100 k to reduce the static power consumption. in other app lications, adding weak pull-down resistors to gnd defaults the device to all paths open (low-power mode). 2. when the audio switch is in the open position, the r and l are terminat ed to gnd with internal termination resistors to discharge any stray capac itance that could cause audio pop.
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev. 1.0.3 4 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability pin configuration figure 2. 16-pin, umlp pin assignments (top-through view) pin descriptions name pin # description usb, uart interface dp_host1 1 d+ signal, dedicated usb port to be connected to the resident usb or uart transceiver on the phone. dm_host1 2 d- signal, dedicated usb port to be connected to the resident usb or uart transceiver on the phone. dp_host2 3 d+ signal, dedicated usb port to be connected to the resident usb or uart transceiver on the phone. dm_host2 4 d- signal, dedicated usb port to be connected to the resident usb or uart transceiver on the phone. audio interface r_host 5 right audio channel from phone audio codec. l_host 6 left audio channel from phone audio codec. mic_host 7 connected to the phone audio codec mic input pin. power interface v cc 16 input voltage supply pin to be connected to the phone battery output. connector interface v bus 12 input voltage supply pin to be connected to the v bus pin of the usb connector. gnd 8 ground. dp_con 11 connected to the usb connector d+ pin; depending on the fsa801 signaling mode, this pin can share dp_host1, dp_host2 or r_host signals. dm_con 10 connected to the usb connector d- pin; depending on the fsa801 signaling mode, this pin can share dm_host1, dm_host2 or l_host signals. charger detection cd_n 9 active-low, open-drain output pin; requi res pull-up resistor to baseband i/o voltage supply switch control sel[2:0] 13-15 switch selection pins; refer to table 1 for truth table.
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev. 1.0.3 5 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the devic e may not function or be operable above the recommended operating c onditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stre sses above the recommended operating conditi ons may affect device reliability. the absolute maximum ratings are stress ratings only. symbol parameter min. max. unit v cc supply voltage from battery / baseband -0.5 6.0 v v bus voltage from mini/micro?usb connector -0.5 28.0 v v sw switch i/o voltage usb/uart path active -0.5 v bus +0.5 v stereo/mono audio path active v cc -8.5 v cc +0.5 all other channels -0.5 v cc +0.5 i ik input clamp diode current -50 ma i sw switch i/o current (continuous) usb 50 ma audio 60 all other channels 50 i swpeak peak switch current (pulsed at 1ms duration, <10% duty cycle) usb 150 ma audio 150 ma all other channels 150 ma t stg storage temperature range -65 +150 c t j maximum junction temperature +150 c t l lead temperature (solder ing, 10 seconds) +260 c esd iec 61000-4-2 system usb connector pins (d+, d-, v bus ) air gap 15 kv contact 8 human body model, jedec jesd22-a114 all pins 3 charged device model, jedec jesd22-c101 all pins 2 recommended operating conditions the recommended operating conditions table defines the conditions for actual device oper ation. recommended operating conditions are specified to ens ure optimal performance to the datasheet specificat ions. fairchild does not recommend exceeding them or designing to absolute maximum ratings. symbol parameter min. max. units v cc battery supply voltage 2.7 4.4 v v sw switch i/o voltage usb/uart path active 0 4.4 v audio path active v cc -7.0 2.0 v mic path active 0 v cc -1 v t a operating temper ature -40 +85 oc
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev. 1.0.3 6 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability switch path dc electrical characteristics all typical values are at 25 c unless otherwise specified. symbol parameter v cc (v) conditions t a = -40 to +85c unit min. typ. max. host interface pins (sel[2:0]) v ih input high voltage 3.2 to 4.4 1.3 v v il input low voltage 3.2 to 4.4 0.7 v i in control input leakage 0 to 4.4 v sw =0 to v cc -1 1 a i oz off state leakage 4.4 0 dp_con, dm_con, dp_hostn, dm_hostn, r_host, l_host 3.6 v -2 2 a charger detect pin (cd_n) v ol output low voltage 3.2 to 4.4 i ol =10 ma 0.4 v v bus pin v busth charger detect threshold 3.2 to 4.4 3.3 v i busin v bus input leakage 0 to 4.4 2 10 a switch off characteristics i off power off leakage current 0 all ports except mic & audio path v sw =0 v to 4.4 v, figure 7 10 a usb switch on paths r onusb hs usb range switch on resistance 3.2 to 4.4 v dp_con/dm_con =0 v, 0.4 v, i on =8 ma, figure 6 6 9 ? r onuart uart range switch on resistance 3.2 to 4.4 v dp_con/dm_con =0 v, 3.2 v, i on =8 ma, figure 6 8 ? audio r/l switch on paths r onaud audio switch on resistance 3.2 to 4.4 v l/r =-0.8 v, 0.8 v, i on =30 ma, figure 6 3 ? r flat audio r on flatness (3) 3.8 0.16 ? r term internal termination resistors 1 k ? mic switch on path r onmic switch on resistance 3.2 to 4.4 sel[2:0]=100 (mic to dp_con), v sw =0 v, 1.6 v, i on =8 ma, figure 6 15 ? sel[2:0]=101 (mic to vbus), v sw =0 v, 1.6 v, i on =8 ma, figure 6 28 ? total switch current consumption i ccsl battery supply sleep mode average current 3.2 to 4.4 static current during sleep mode (sel[2:0]=0) 1 a i ccwk battery supply active mode average current 3.2 to 4.4 usb/uart mode 20 35 a audio mode (sel[2:0]=011), v bus =0 v 1 a audio mode (sel[2:0]=100, 101) 20 35 a i ccselt increase in i ccsl /i ccwk current per control voltage and v cc 3.2 to 4.4 v sel = 2.8 v and v cc = 4.4 v 8 a v sel = 1.8 v and v cc = 4.4 v 10 a note: 3. flatness is defined as the diffe rence between the maximum and minimum values of on resistance over the specified range of conditions.
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev. 1.0.3 7 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability switch path ac electrical characteristics (4) all typical value are for v cc =3.8 v at 25c unless otherwise specified. symbol parameter v cc (v) conditions t a = -40 to +85c unit figure min. typ. max. xtalk active channel crosstalk dp_con to dm_con audio mode 3.8 f=20 khz, r t =32 ? , c l =0 pf -95 db figure 9 usb mode 3.8 f=1 mhz, r t =50 ? , c l =0 pf -78 f=240 mhz, r t =50 ? , c l =0 pf -36 active channel crosstalk mic mic on vbus to r_host, l_host 3.8 f=20 khz, r t =32 ? , c l =0 pf -93 mic on dp_con to l_host 3.8 f=20 khz, r t =32 ? , c l =0 pf -105 o irr off isolation rejection ratio audio rejection l_host to dm_con, r_host to dp_con 3.8 f=20 khz, r t =32 ? , c l =0 pf -100 db figure 8 mic rejection mic_host to dp_con 3.8 f=20 khz, r t =50 ? , c l =0pf -110 mic rejection mic_host to vbus 3.8 f=20 khz, r t =50 ? , c l =0 pf -110 usb rejection dm_host to dm_con, dp_host to dp_con 3.8 f=1 mhz, r t =50 ? , c l =0 pf -85 f=240 mhz, r t =50 ? , c l =0 pf -35 psrr power supply rejection ratio mic on vbus or mic on dp_con, to vcc or gnd 3.8 power supply noise 300mv pp , f=217hz -110 db thd+n total harmonic distortion + noise (audio path) 3.8 20 hz to 20 khz, r l =16 ? , input signal range 1.6 v pp 0.10 % figure 13 20 hz to 20 khz, r l =32 ? , input signal range 1.6 v pp 0.07 % figure 13 t cdr charger detection reset time: minimum time in selected state to reset charger detection state machine. 3.8 sel[2:0]=?111? 30 s t cdl charger detection start time: minimum time in selected state to start charger detection sequence 3.8 sel[2:0]=?000? 30 s note: 4. guaranteed by characteriza tion, not production tested. capacitance symbol parameter v cc (v) conditions t a = -40 to +85c unit figure typ. max. c in select pins capacitance (5) 0 v bias =0.2 v 2.5 pf figure 11 c off(d+, d-) d+, d- on capacitance (hs usb mode) (5) 3.8 v bias =0.2 v, f=1 mhz 4.7 pf figure 11 c on(d+, d-) d+, d- on capacitance (hs usb mode) (5) 3.8 v bias =0.2 v, f=1 mhz 7.6 pf figure 12 note: 5. guaranteed by characteriza tion, not production tested.
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev. 1.0.3 8 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability high-speed usb eye compliance results figure 3. high-speed test results (dp_con/dm_con ? dp_host1/dm_host1) figure 4. high-speed test results (dp_con/dm_con ? dp_host2/dm_host2) figure 5. high-speed eye compliance input signal
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev. 1.0.3 9 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability test diagrams select nb n na v sel = 0 or v cc i on v on r on = v on /i on gnd v in gnd v in select v sel = 0 orv cc nc a i a(off) v in gnd **each switch port is tested separately. v in figure 6. on resistance figure 7. off leakage v out gnd gnd r t gnd gnd v s r s network analyzer r t gnd r s and r t are functions of the application environment (see ac/dc tables). v sel gnd off-isolation = 20 log (v out /v in ) - v out gnd gnd r t gnd gnd v s r s network analyzer r t gnd r s and r t are functions of the application environment (see ac tables for values). v s1, s2, s3 gnd crosstalk = 20 log (v o u v in nc figure 8. channel off isolation figure 9. active channel crosstalk r s v out q = v out ? c l v out v out v cc 0v input ? v sel generator gnd v s c l v sel v in b ns n gnd c l includes test fixture and stray capacitance gnd off on off ma figure 10. charge injection test
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev. 1.0.3 10 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability test diagrams (continued) v sel = 0 or v c c nb n capacitance meter ns n nb n f=1mhz v sel = 0 orv cc nb n capacitance meter ns n nb n f=1mhz figure 11. channel off capacitance figure 12. channel on capacitance v out gnd gnd r t gnd gnd v s r s audio analyzer v cntrl gnd v in r s and r t are functions of the application environment (see ac tables for specific values). v sel = 0 or v cc figure 13. total harmonic distortion + noise
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev. 1.0.3 11 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability physical dimensions recommended land pattern notes: a. package does not fully conform to jedec standard. b. dimensions are in millimeters. c. dimensions and tolerances per asme y14.5m, 1994. d. land pattern recommendation is based on fsc design only. e. drawing filename: mkt-umlp16arev4. f. terminal shape may vary according to package supplier, see terminal shape variants. scale : 2x lead option 1 scale : 2x lead option 2 pin#1 ident pin#1 ident package edge top view bottom view 0.10 c 0.08 c 2.60 1.80 0.10 c 2x 2x side view 0.10 c 0.05 0.00 0.10 c a b 0.05 c 0.55 max. 0.40 1 5 9 13 16 2.10 2.90 0.40 0.663 0.563 0.225 1 (15x) (16x) 0.152 0.40 0.60 0.10 0.30 0.50 0.10 terminal shape variants 0.15 0.25 15x pin 1 non-pin 1 0.15 0.25 15x 0.30 0.50 0.15 0.25 0.30 0.50 0.15 0.25 15x 15x supplier 1 supplier 2 pin 1 non-pin 1 a b c seating plane 0.45 0.35 0.55 0.45 0.25 0.15 r0.20 figure 14. 16-lead, ultrathin molded leadless package (umlp) package drawings are provided as a servic e to customers considering fairchild co mponents. drawings may change in any manner without notice. please note the revision and/or date on the drawi ng and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online pack aging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fsa801 ? rev. 1.0.3 12 fsa801 ? usb2.0 high-speed (480mbps), uart, a nd audio switch with negative signal capability

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