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NJU7394 - 1 - NJU7394 ver.3.1 _e pushbutton interface evr ? general description ? package outline the NJU7394 is a pushbutton interface electronic volume. it includes a electronic volume controller with differential input, attenuator function, some indicator and a stand-by function (power-saving mode). the NJU7394 has also built-in push button interface for its volume up/down controls and power on/off controls - making application possible without the use of micro-controller. the NJU7394 is suitable for low power application and also for application without micro-controller such as mobile audio player and cradle speaker for mobile game. ? features ? operating voltage +2.7 to +5.5v ? low operating current 2ma typ. (active mode) 1a typ. (stand-by mode) ? pop-noise reduction ? quasi-differential input ? pushbutton interface evr +6 to -62db, mute ? adjustable initial volume -6db, -10db, -14db, -18db ? attenuator / soft mute func tion -10db, -15db, -20db, mute ? cmos technology ? package outline ssop20 ? block diagram input l input r input g v + down up output l v + v + gnd vr ef bias v + output r iref tes t mode v + power indicator v + power swmode power button initial volume adjuster -6,-10,-14,-18 db v + standby stby attenuate level adjuster -10,-15,-20db,mute v + attenuator v + volume indicator att up down test pwind volind pwsw vol ad j attadj bias electric volume (+6db to -62db, mute) volume control logic power contrel logic attenuator bypass/att. (-10db, -15db, -20db, mute) r att r init NJU7394vc3
- 2 - NJU7394 NJU7394 ver.3.0_e ? pin configuration no. symbol function no symbol function 1 i n l lch input 11 v o l i n d volume indicator 2 i n g common input 12 p w i n d power indicator 3 i n r rch input 13 v o l a d j initial volume adjustor 4 s w m o d e control mode setting 14 at ta d j attenuator adjustor 5 s t b y standby setting 15 v + power supply 6 at t attenuator setting 16 g n d ground 7 p w s w power switch 17 i r e f reference current 8 u p volume up switch 18 o u t r rch output 9 d o w n volume down switch 19 v r e f reference voltage 10 t e s t test terminal 20 o u t l lch output 20 11 10 1
- 3 - NJU7394 NJU7394 ver.3.0_e ? absolute maximum rating (ta=25 c) parameter symbol rating unit power supply voltage v + +7 v power dissipation p d 540* 1) mw maximum input voltage v imax 0 to v + * 2) v operating temperature range topr -40 to +85 o c storage temperature range tstg -40 to +125 o c * 1) eia/jedec standard test board (76.2x 114.3x1.6mm, 2layer, fr-4) mounting * 2) don?t apply the input voltage that exceeds supply voltage. ? electrical recommended operating condition (ta=25 c) parameter symbol test condition min. typ. max. unit operating voltage v + - 2.7 3.3 5.5 v ? electrical characteristics dc characteristics (ta=25 c, v + =3.3v, unless otherwise specified) parameter symbol test condition min. typ. max. unit i dd1 no signal, active - 2.0 3.0 ma operating current i dd2 no signal, standby* 3) - 0.1 1.0 a reference voltage v ref no signal 1.5 1.65 1.8 v * 3) in case of the voltage of each terminal swmode , stby, att, pwsw, up, down and test is ?l?=0v. ac characteristics (ta=25 c, v + =3.3v, v in =500mvrms, f=1khz, att: off, vol: 6db, unless otherwise specified) parameter symbol test condition min. typ. max. unit maximum input voltage v im thd=1% bw=400hz-30khz 500 550 - mvrms output noise voltage 1 v no1 rg=0 ? , a-weighted - -100 (10) -94 (20) dbv (vrms) output noise voltage 2 v no2 rg=0 ? , a-weighted vol=-62db - -100 (10) -94 (20) dbv (vrms) total harmonic distortion thd+n v in =250mvrms bw=400hz-30khz - 0.05 0.1 % maximum gain g vmax 5.0 6.0 7.0 db initial volume 1 g vinit1 power-on state r init =0 ? -8.0 -6.0 -4.0 db initial volume 2 g vinit2 power-on state r init =47k ? -12.0 -10.0 -8.0 db initial volume 3 g vinit3 power-on state r init =100k ? -16.0 -14.0 -12.0 db initial volume 4 g vinit4 power-on state r init =open -20.0 -18.0 -16.0 db maximum attenuate level g v-62 vol=-62db bw=400hz-30khz -64 -62 -60 db mute level mute vol=mute bw=400hz-30khz - -90 -84 db
- 4 - NJU7394 NJU7394 ver.3.0_e indicator output block (ta=25 c, v + =3.3v, unless otherwise specified) parameter symbol test condition min. typ. max. unit high output voltage v oh i source =1ma (pin 11, pin 12) v + *0.8 - v + v low output voltage v ol i sink =1ma (pin 11, pin 12) 0 - v + *0.2 v control block (ta=25 c, v + =3.3v, unless otherwise specified) parameter symbol test condition min. typ. max. unit high input voltage v ih pin4, pin5, pin6, pin7, pin8, pin9 v + *0.8 - v + v low input voltage v il pin4, pin5, pin6, pin7, pin8, pin9 0 - v + *0.2 v pull-up resistance r pullup - 100 - k ? mode resistance range 1/4 r mode1 pin 13, pin 14 0 - 20 k ? mode resistance range 2/4 r mode2 pin 13, pin 14 40 - 60 k ? mode resistance range 3/4 r mode3 pin 13, pin 14 90 - 110 k ? mode resistance range 4/4 r mode4 pin 13, pin 14 150 - k ? pulse distinction time 15 20 25 ms auto increment distinction time 0.8 1 1.2 s auto increment cycle 133 167 200 ms parameter symbol test condition min. typ. max. unit att level 1 g vatt1 att:on r att =0 ? -12.0 -10.0 -8.0 db att level 2 g vatt2 att:on r att =47k ? -17.0 -15.0 -13.0 db att level 3 g vatt3 att:on r att =100k ? -22.0 -20.0 -18.0 db att mute level g vatt4 att:on, r att =open bw=400hz-30khz - -100 -90 db channel balance g cb -1.0 0.0 1.0 db channel separation cs rg=0 ? bw=400hz-30khz 80 90 - db
- 5 - NJU7394 NJU7394 ver.3.0_e ? terminal description pin no. symbol function equivalent circuit terminal dc voltage 1 3 in1l in1r lch input 1 rch input 1 v + /2 v + /2 2 in1g common input 1 v + /2 4 5 in2l in2r lch input 2 rch input 2 v + /2 v + /2 6 8 17 18 19 28 30 31 32 exoutl exoutr bbind exind pwind bb1 bb3 outr outl stereo expander output l stereo expander output r bass boost indicator stereo expander indicator power indicator bass boost filter terminal 1 bass boost filter terminal 3 rch output lch output v + /2 v + /2 0v or v + 0v or v + 0v or v + v + /2 v + /2 v + /2 v + /2 v+ v+ 50k ? 50k ? 10pf 10pf v+ vref v+ 1k ? 500k ? 10pf 10pf v+ vref v+ 50k ? 50k ? 10pf 10pf v+ 52.5 ? v+
- 6 - NJU7394 NJU7394 ver.3.0_e pin no. symbol function equivalent circuit terminal dc voltage 7 9 volinl volinr volume input l volume input r v + /2 v + /2 10 selsw input selector setting 0v 11 14 15 16 pwsw up down test power switch volume up switch volume down switch te s t te r m i n a l 0v 0v 0v 0v 12 13 exsw bbsw stereo expander switch bass boost switch v + /2 v + /2 v+ vref v+ 50k ? 50k ? 52.5 ? v+ v+ v+ 52.5 ? 100k ? v+ v+ 52.5 ? 100k ? v+ v+ 52.5 ? 200k ? v+ 200k ?
- 7 - NJU7394 NJU7394 ver.3.0_e pin no. symbol function equivalent circuit terminal dc voltage 20 21 27 treble swmode sense treble gain setting control mode setting limiter threshold setting it depends on a test circuit. 22 iref reference current 1.2v 23 vref reference voltage v + /2 24 v + power supply v + v+ v+ 52.5 ? v+ v+ 52.5 ? v+ 5k ? 5k ? v+ 52.5 ? v+ 200k ? 200k ? v+ 20k ? 20k ?
- 8 - NJU7394 NJU7394 ver.3.0_e pin no. symbol function equivalent circuit terminal dc voltage 25 gnd ground 0v 26 int limiter recove ry time setting 0v 29 b b 2 bass boost filter terminal 2 v + /2 1k ? v+ v+ v+ v+ 1k ? 10pf 1k ? vref
- 9 - NJU7394 NJU7394 ver.3.0_e ? pin description swmode (pin 4) pin condition function l pwsw: momentary sw mode. h pwsw: toggle sw mode. momentary sw mode data format toggle sw mode data format stby (pin 5) toggle sw mode pin condition function l when swmode and pwsw are low, ic becomes a standby mode. h when pwsw is high, ic becomes active mode. * the ?momentary sw mode? does not support. down (pin 15) toggle sw mode pin condition function l attenuator: off h attenuator: on * the ?momentary sw mode? does not support. pwsw (pin 7) momentary sw mode setting pin condition function open(l) h system status is changed to active mode and standby mode alternately. h open(l) no change. toggle sw mode setting pin condition function h active mode open(l) standby mode. low high mode change [ ex. on ] mode change [ ex. off ] mode change [ ex. on ] low high mode change [ ex. on ] mode change [ ex. off ] mode change [ ex. on ]
- 10 - NJU7394 NJU7394 ver.3.0_e up (pin 8) momentary sw mode setting pin condition function open(l) h volume setting is increased 1 step. long push increase volume setting continuously. h open(l) no change. * the ?toggle sw mode? does not support. down (pin 9) momentary sw mode setting pin condition function open(l) h volume setting is decreased 1 step. long push decrease volume setting continuously. h open(l) no change. * the ?toggle sw mode? does not support. test (pin 10) pin condition function l normal operation mode h test mode. do not use for normal operation. voladj (pin 13) connected resistance function 0 ? to 20k ? volume initial value: -6db 40 ? to 60k ? volume initial value: -10db 90k ? to 110k ? volume initial value: -14db 150k ? to open volume initial value: -18db attadj (pin 14) connected resistance function 0 ? to 20k ? attenuator initial value: -10db 40 ? to 60k ? attenuator initial value: -15db 90k ? to 110k ? attenuator initial value: -20db 150k ? to open mute
- 11 - NJU7394 NJU7394 ver.3.0_e ? control data initial condition (power on) function terminal condition power pin 7 standby volume pin 8, pin 9 -6db, -10db, -14db, -18db volume gain step setting step no. volume [db] 0 mute 1 -62 2 -58 3 -54 4 -50 5 -46 6 -42 7 -39 8 -36 9 -33 10 -30 11 -28 12 -26 13 -24 14 -22 15 -20 16 -18 (*) 17 -16 18 -14 (*) 19 -12 20 -10 (*) 21 -8 22 -6 (*) 23 -4 24 -2 25 0 26 +1 27 +2 28 +3 29 +4 30 +5 31 +6 (*) initial setting
- 12 - NJU7394 NJU7394 ver.3.0_e timing chart (momentary sw mode) standby release (standby mode ? active mode) standby (active mode ? standby mode) pwsw (pin7) 20ms output (pin18, pin20) 0v v + /2 pwind (pin12) 40ms low high 280ms low or open high pwsw (pin7) 20ms output (pin18, pin20) 0v v + /2 pwind (pin12) 40ms low high 280ms low or open high
- 13 - NJU7394 NJU7394 ver.3.0_e timing chart (toggle sw mode) standby release (standby mode ? active mode) standby (active mode ? standby mode) pwsw (pin7) 20ms output (pin18, pin20) 0v v + /2 pwind (pin12) 40ms low high 280ms low or open high pwsw (pin7) 20ms output (pin18, pin20) 0v v + /2 pwind (pin12) 40ms low high 280ms low or open high
- 14 - NJU7394 NJU7394 ver.3.0_e timing chart (volume up/down control) 1. recognition condition of volume up/down push button i/f 1-a.) the volume up/(down) recognizes the data-command to the case that the down(up) button has not been pushed, besides that the up(down) button is pushed for the longer time than the ?pulse distinction time: 20ms". 1-b.) the volume up/(down) re cognizes the data-command to the case that the up(down) button has pushed earlier than the down(up) button, besides th e up(down) button is pushed for the longer time than the ?pulse distinction time: 20ms". 2. invalidity condition of volume up/down push button i/f 2-a.) the volume up/(down) does not recognize the data-command to the case that the up(down) button has pushed for the shorter time than the ?pulse distinction time: 20ms". (the chattering prevention function operates.) 2-b.) the volume up/(down) does not recognize the data-command to the case that the up(down) button has pushed for the shorter time than the ?pulse distinction time: 20ms" after released button. (the chattering prevention function operates.) 2-c.) the volume up/(down) does not recognize the data-command to the case that the up(down) button has pushed before releasing down(up) button. up down 1-a > pulse distinction time (20ms typ.) recognition up down 1-b > pulse distinction time (20ms typ.) recognition up down 2-c up down 2-a < pulse distinction time (20ms typ.) up down 2-b < pulse distinction time (20ms typ.)
- 15 - NJU7394 NJU7394 ver.3.0_e timing chart (volume up/down control) 3. start condition of volume up/down auto increment function 3-a.) the auto increment of volume up(down) is started to the case that the down(up) button has not been pushed, besides that the up(down) button is pushed for the longer time than the ?auto increment distinction time: 1s". 4. stop condition of volume up/down auto increment function 4-a.) the auto increment of volume up(down) is stopped to the case that the up(down) button has released for the longer time than the ?pulse distinction time: 20ms" for the auto increment period. 4-b.) the auto increment of volume up(down) is stopped to the case that the down(up) button has pushed for the auto increment period. up down 3-a > auto increment distinction time (1s typ.) auto increment starts up down 4-a auto increment distinction time (1s typ.) increment start increment stop pulse distinction time (20ms typ.) up down 4-b increment start auto increment distinction time (1s typ.) increment stop
- 16 - NJU7394 NJU7394 ver.3.0_e application circuit [caution] the specifications on this databook are only given for information , without any guarantee as regards either mist akes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. 1 2 3 4 5 6 7 8 9 10 input l inl v + 0.47 f1 f ing inr test pwsw up down v + out l out r v + 0.47 f input g input r 100k ? 1 f 1 f output l output r NJU7394 18 17 16 15 14 13 12 11 19 20 att v + v + gn d v+ vre f swmode v + stby ire f pwin d volin d attad j volad j v + v + r att r init

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