june 2012 ? 2008 fairchild semiconductor corporation www.fairchildsemi.com fsa9280a ? rev 1.0.9 fsa9280a ? usb port multimedia switch, feat uring automatic select and accessory detection fsa9280a usb port multimedia switch featuring automatic select and accessory detection features signals audio, usb, uart, usb charging switch mechanism automatic switching with available interrupt accessory detection headsets (headphone/mic/remote) usb data port (sdp) uart serial link usb chargers (car-kit, cdp, dcp) factory-mode tty converter usb fs and hs 2.0 compliant usb charging battery charging 1.1 compliant (including optional dcd) integrated power fet over-voltage tolerance (ovt) 28v over-current protection (ocp) 1.5a over-voltage protection (ovp) 6.8v audio left, right, mic, tty v bat 3 to 4.4v programmability i 2 c esd 15kv iec 61000-4-2 air gap package 20-lead umlp (3 x 4 x 0.55mm, 0.5mm pitch) ordering information fsa9280aumx description the fsa9280a is a high-performance multimedia switch featuring automatic switchin g and accessory detection for the usb port. this switch allows sharing of a common usb port to pass audio, usb data / charging, as well as factory programmability. in addition, the fsa9280a integrates detection of accessories; such as headphones, headsets (mic / button), car chargers, usb chargers, and uart data cables; with the ability to use a common usb connector. the fsa9280a can be programmed for manual or automatic switching of data paths bas ed on accessory detected. fsa9280a includes an integrated 28v over-voltage and 1.5a over-current protected fet. applications ? mobile phones & portable media players related resources ? fsa9280a evaluation board ? evaluation board users guide ? for samples, questions or board requests; please contact analogswitch@fairchildsemi.com figure 1. typical application fsa9280a
? 2011 fairchild semiconductor corporation www.fairchildsemi.com fsa9280a ? rev 1.0.9 2 fsa9280a ? usb port multimedia switch, feat uring automatic select and accessory detection table of contents features ...................................................................................................................... ................................................................. 1 descripti on ................................................................................................................... ................................................................ 1 applicat ions .................................................................................................................. ................................................................ 1 related re sources ............................................................................................................. .......................................................... 1 table of c ontents ............................................................................................................. ............................................................ 2 block di agram ................................................................................................................. ............................................................. 3 pin confi guration ............................................................................................................. ............................................................. 3 pin descrip tions .............................................................................................................. ............................................................. 4 1. functi onalit y .............................................................................................................. ............................................................ 5 1.1. functional overview ...................................................................................................... ............................................. 5 2. power-up & reset ........................................................................................................... ...................................................... 6 2.1. re set .................................................................................................................... ...................................................... 6 2.1.1. hardwa re reset ......................................................................................................... ...................................... 6 2.1.2. softwa re reset ......................................................................................................... ....................................... 6 3. i 2 c ............................................................................................................................. ............................................................ 7 4. confi guration .............................................................................................................. ........................................................... 8 5. dete ction .................................................................................................................. ............................................................. 8 5.1. usb port detection ....................................................................................................... ............................................ 10 5.2. audio accesso ry detection ................................................................................................ ....................................... 12 5.3. ocp and o vp detection .................................................................................................... ...................................... 13 6. processor co mmunication .................................................................................................... .............................................. 13 7. switch co nfigurat ion ....................................................................................................... .................................................... 13 7.1. manual switching ......................................................................................................... ............................................. 14 8. active signal performance .................................................................................................. ................................................ 15 8.1. usb data ................................................................................................................. ................................................. 15 8.2. fs usb ................................................................................................................... .................................................. 15 8.3. audio .................................................................................................................... .................................................... 15 9. electrical s pecifications .................................................................................................. .................................................... 16 9.1. absolute ma ximum ratings ................................................................................................. ..................................... 16 9.2. recommended oper ating cond itions ......................................................................................... .............................. 16 9.3. switch path dc electrical characteristics ................................................................................................................. 16 9.4. capa citance .............................................................................................................. ................................................ 18 9.5. switch path ac elec trical charac teristics ................................................................................ ................................. 18 9.6. i 2 c controller dc c haracteri stics................................................................................................ .............................. 19 9.7. i 2 c ac electrical characte ristics & regi ster map ................................................................................ ..................... 19 9.8. factor y modes ............................................................................................................ .............................................. 23 9.8.1. factory-mode a ccessory de tection ....................................................................................... ........................ 23 10. reference schematic ....................................................................................................... ................................................... 26 11. layout gu idelines ......................................................................................................... ...................................................... 27 11.1. pcb layout guidelines for high-speed usb si gnal int egrit y ............................................................... ................... 27 11.2. layout for gsm/ tdma buzz re duction ...................................................................................... ............................. 27 11.3. v bus_out load timing r equirem ents ..................................................................................................... ................... 27 11.4. systems with mult iple usb c ontrollers ................................................................................... ................................. 28 physical dim ensions ........................................................................................................... ....................................................... 29
? 2011 fairchild semiconductor corporation www.fairchildsemi.com fsa9280a ? rev 1.0.9 3 fsa9280a ? usb port multimedia switch, feat uring automatic select and accessory detection block diagram figure 2. block diagram pin configuration figure 3. pin assignments (top view) baseband processor v bus_in micro usb dm_con dp_con gnd id_con hs ? usb intb i2c_scl i2c_sda v ddio dp_host dm_host i 2 c fs ? usb or ? uart audio codec audio_r audio_l rxd txd interrupt fsa9280a mic phone power float detect charger detect switch control and i 2 c slave \ detection ocp,ovp 3:1 ? mux and charge pump v bat adc ? id detect chg_det jig boot charger ? ic v bus_out 7 8 9 10 13 14 15 2 3 16 20 19 18 17 4 id_con dp_con dm_con v bus_in chg_det v bus_out i2c_scl i2c_sda txd boot v ddio jig audio_r audio_l mic dp_host 11 12 5 6 intb v bat dm_host rxd 1 gnd exposed dap
? 2011 fairchild semiconductor corporation www.fairchildsemi.com fsa9280a ? rev 1.0.9 29 fsa9280a ? usb port multimedia switch, feat uring automatic select and accessory detection physical dimensions figure 30. 20-lead ultrathin molded leadless package (umlp), 3 x 4 x 0.55mm, 0.5mm pitch package drawings are provided as a service to customers considering fairchild component s. drawings may change in any manner wit hout notice. please note the revision and/or date on the drawing and contact a fairchild semi conductor representative to verify or o btain the most recent revision. package specific ations do not expand the terms of fairchild?s worldwide terms and conditi ons, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packaging area for the most recent package drawings: http://www.fairchildsemi.com /packaging/. please visit fairchild semiconductor?s online packaging area for the most recent tape and reel specifications: http://www.fairchildsemi.com/packaging/3x4umlp20_tnr.pdf . part number operating temperature range top mark package fsa9280aumx -40 to +85c 9280a 20-lead ultrathin molded leadless package (umlp), 3 x 4 x 0.55mm, 0.5 pitch bottom view top view recommended land pattern side view 2x 2x notes: a. package conforms to jedec mo-220 except where noted. b. dimensions are in millimeters. c. dimensions and tolerances per asme y14.5m, 1994. d. drawing filename: mkt-umlp20arev1. 0.10 c 0.10 c 0.10 cab 0.05 c pin 1 ident 1 6 7 10 0.55 max 0.05 0.00 0.08 c 0.10 c seating plane (0.15) 11 16 17 20 pin1 ident 4.00 3.00 a b c 1.70 1.60 2.70 2.60 20x 0.45 0.35 0.25 0.15 20x 0.50 1.70 2.70 3.80 2.80 0.50 0.30 0.60 20x 20x a e. land pattern recommendation is based on fsc design only
? 2011 fairchild semiconductor corporation www.fairchildsemi.com fsa9280a ? rev 1.0.9 30 fsa9280a ? usb port multimedia switch, feat uring automatic select and accessory detection
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