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SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?1?of?16 t/p?switchable?dialer?with?redial?handfree?function description the? SC91214/15? series? is? a? single- chip,? silicon? gate,? cmos integrated? circuit? with? an? on- chip? oscillator? for? a? 3.58mhz? crystal? or ceramic? resonator.? it? provides? a? dialing? pulse? (dp)? or? dual? tone? multi- f requency?(dtmf)?dialing.?a?standard?4?x4?matrix?keyboard?can?be?used to?support?either?dp?or?dtmf?modes. features *?one?touch?redial?operation *?tone/pulse?switchable *?32?digit?capacity?for?redialing *?automatic?mixed?redialing?(last?number?redial)?of?pul se?to?dtmf?with multiple?automatic?access?pauses *?pabx?auto-pause?is?2.2?seconds *?dtmf?timing: manual?dialing:?minimum?duration?for?bursts?and?pauses redialing:?calibrated?timing *?hands-free?control?function *?wide?operating?voltage?range:?2v?to?5.5v *?key-in?beep?tone?output *? digits? dialed?manually? after? redialing? are? cascadable? and?stored? as additional?digits?for?the?next?redialing *?uses?inexpensive?ceramic?resonator?(3.58?mhz) *?two?versions?for?different?telephone?systems *?built-in?power?up?reset?circuit *?four?extra?function?keys:?flash,?pause,?redial?and?dp?or?dtmf?mixed dialing *?4?x?4?(or?2?x?8)?keyboard?can?be?used *?low?standby?current ordering?information part package SC91214/15a dip-16?package SC91214/15b dip-18?package SC91214/15c dip-18?package SC91214/15d dip-20?package
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?2?of?16 block?diagram absolute?maximum?rating (t amb =25 c,?all?voltage?referenced?to?v ss ,?unless?otherwise?specified) characteristics symbol value unit power?supply?voltage v dd 6.0 v input?voltage v in -0.3~v dd +0.3 v output?voltage v out -0.3~v dd +0.3 v output?voltage?(dp,?xmit?mute) v out 1.2 v tone?output?current i tone 50 ma power?dissipation p d 500 mw operating?temperature t opr -25~+70 c storage?temperature t stg -55~+150 c note: stresses? above? those? listed? under? ?absolute? maximum? ratings?? may? cause? permanent? damage? to? this device.?these?are?stress?ratings?only.?functional?operation?of?this?device?at?these?or?any?other?conditions above?those?indicated?in?the?operational?sections?of?this?specification?is?not?implied?or?intended.?exposure to?the?absolute?maximum?rating?conditions?for?extended?periods?may?affect?device?reliability.
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?3?of?16 ac?electrical?characteristics (t op =25 c,?v dd =3.5v,?v ss =0v,?f osc =3.579545mhz,?all?voltage referenced?to?v ss ,?unless?otherwise?specified) characteristics symbol conditions min. typ. max. unit test kt. tone?mode 2.0 -- 5.5 operating?voltage v dd pulse?mode 2.0 -- 5.5 v a memory?retention?voltage v mr 1 v -- memory?retention?current i mr v dd =1.0v, hk =v dd all?outputs?unloaded 0.05 0.4 m a -- i ddp ? pulse?mode 0.32 1.0 operating?current i ddt ? tone?mode all?outputs?unloaded 0.6 2.0 ma a hk =v dd =1.5v 0.03 0.05 standby?current i so hk =v ss all?outputs?un loaded, no?key?selected 0.5 10 m a a v ih 0.8 1 input?voltage v il 0 0.2 v dd r1 - r4 input?current i r 115 m a c v oc ? column 584 730 876 tone?out?voltage v or ? row v dd =3.5v,?r l =5k 456 570 684 mv p-p d hfi pull?low?current |?i hfi ?| v dd =3.5v?(note?1) hfi pin?connected?to?0v 5 m a b hfo?drive?current |?i oh1 | v dd =3.5v v oh =v dd -0.4v 0.4 2 ma b hfo, kt ,?modeout xmitmute sink?current i ol1 v dd =3.5v v ol =0.4v 0.9 5.3 ma b dp sink?current i ol2 ?v dd =3.5v,?v ol =0.4v 1.1 5.3 ma b distortion dis% *?see?note?below 1 5 % *?note: 1/2 2 2 1/2 2 2 2 ) v ih v il ( ) v n v 2 v 1 ( x 100 dis% + + + + = 1.?v 1 ? ?v n ?are?the?intermediation?or?the?harmonic?frequencies?in?the?500hz?to?3400hz?band. 2.?v il ?and?v ih ?are?the?individual?frequency?components?of?the?dtmf?signal. ac?characteristics (t op =25 c,?v dd =3.5v,?v ss =0v,?f osc =3.579545mhz,?all?voltage?referenced?to?v ss , unless?otherwise?specified) characteristics symbol conditions min. typ. max. unit m/b=1/2 33.3 10pps m/b=2/3 40.0 m/b=1/2 16.7 make?time t m 20pps m/b=2/3 20.0 ms (to?be?continued)
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?4?of?16 (continued) characteristics symbol conditions min. typ. max. unit m/b=1/2 66.6 10pps m/b=2/3 60.0 m/b=1/2 33.3 break?time t b 20pps m/b=2/3 30.0 ms 10pps 824 inter-digit?pause?time t idp 20pps 458 ms pause?time t pau 2.2 sec auto-redial?break?time t aobk 2.2 sec delay?time?key?valid?to?signal out t d 0 ms key-in?debounce t kd 21 ms key?release?debounce?time t kld 5.2 ms key-in?tone?duration t ktd 23 ms key-in?tone?frequency f kt 437 hz minimum?tone?duration?time t mfd 90 ms min.?tone?inter-digit?pause t tidp 100 ms redial?tone?duration t mfdr 90 ms redial?tone?inter-digit?duration t tidpr 100 ms comparisons?of?specified?vs?actual?tone?frequencies ?(f osc =3.579mhz) r/c spec. actual error?(%) unit r1 697 699.1 +0.31 hz r2 770 771.5 +0.19 hz r3 852 852.3 +0.03 hz r4 941 942.0 +0.10 hz c1 1,29 1,215.7 +0.57 hz c2 1,336 1,331.7 -0.32 hz c3 1,477 1,471.9 -0.35 hz keyboard?assignment 1)?*/t:?in?pulse?mode?this?key?works?as?pulse ? dtmf?key?(t?key).?in?dtmf?mode?the?key?works?as?*?key. */t?key?will?occupy?one?memory?digit?in?either?use.
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?5?of?16 2)?f1:?flash?key.?the?break?time?is?297?ms?or?96?ms?(SC91214/15?respectively) 3)?f2:?flash?key?for?break?time?640?ms 4)?p:?pause?key?(2.2?seconds) 5)?rd:?one?key?redial?key 6)?emn:?one?touch?memory?key 7)?#:?in?pulse?mode?this?key?input?is?neglected.?in?dtmf?mode?this?key?works?as?#?key. pin?configuration
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?6?of?16 pin?description pin?no. sc9121 4a sc9121 4b sc9121 4c sc9121 4d pin name description 3 4 3 4 4 5 4 5 osci osco oscillator?input?and?output?pins. the?time?base?for?the?SC91214/15?is?a?crystal controlled?on-chip?oscillator,?which?is?completed?by connecting?a?3.58mhz?crystal?or?ceramic resonator?between?the?osci?and?osco?pins. 2 2 3 3 mode in tri-state?mode?select?pin. there?ate?two?versions?of?the?SC91214/15?as follows: a.?sc91215?series?is?for?european?and?american systems. mode?in tone/ pulse dial rate m/b ratio v dd pulse 10pps 2/3 v ss tone -- -- floating pulse 10pps 1/2 b.?the?SC91214?series?is?for?the?japanese system. mode?in tone/ pulse dial rate m/b ratio v dd pulse 10pps 1/2 v ss tone -- -- floating pulse 20pps 1/2 the?mode?selection?pin?is?checked?for?tone/pulse dialing?as?each?digit?key?entery.?in?the?pulse mode,?the?dialing?rate?is?checked,?along?with?the make/break?ratio,?at?first?key?entry. 1 1 2 2 hk hook?switch?input this?inverter?input?pin?detects?the?state?of?the?hook switch?contact.??off?hook??is?represented?by?a?v dd condition. ?(n.a.) 10 (n.a.) 11 kt key-in?tone?output this?n-channel?open?drain?pin?sends?out?a??beep? tone?for?each?pulse?mode?key?entry,?along?with entries?of?accepted?function?keys?(rd,?t,?f1?f2, an?p?keys).?the?tone?output?frequency?is?437hz and?tone?duration?is?23?ms. (to?be?continued)
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?7?of?16 (continued) pin?no. sc9121 4a sc9121 4b sc9121 4c sc9121 4d pin name description 9 11 10 12 dp dialing?pulse?output this?is?an?n-channel?open?drain?output.?the normal?output?will?be??on??during?break?an??off? during?make?in?the?pulse?dialing?mode. 1 1 hfo (n.a.) (n.a.) 18 20 hfi hands-free?control?i/o?pins these?pins?enable?and?disable?the?hands-free control?function.?when?input?pin hfi ?goes?low,?the hands-free?control?state?is?toggled?on.?the?status of?the?hands-free?control?state?is?listed?in?the following?table: 7 7 8 8 tone? tone?dialing?output when?a?valid?key-press?is?detected?in?the?dtmf mode,?appropriate?low?group?and?high?group, frequencies?the?dual?tone?output.?tone?output?is in?the??off??state?in?pulse?mode. 8 8 9 9 xmitmute dialing?transmission?mute?output this?is?an?n-channel?open?drain?output.?the xmitmute ?is?normally??off?.?during?pulse?or?dtmf dialing?this?output?is??on?. (n.a.) 9 (n.a.) 10 mode out mode?output?pin this?is?an?n-channel,?open?drain?output.?it?is??on? during?tone?output?and??off??during?pulse?output. 13 15 14 16 r1 14 16 15 17 r2 15 17 16 18 r3 16 18 17 19 r4 10 12 11 13 c1 11 13 12 14 c2 12 14 13 15 c3 keyboard?pins this?input?serves?as?the?interface?to?an?xy?matrix keyboard.?on?a?4?x?4?matrix?keyboard,?the?input from?the?fourth?column, c4 ,?should?be?connected to?v ss . 6 6 7 7 v dd 5 5 6 6 v ss power?supply?pins these?devices?are?designed?to?operate?from?2.0v to?5.5v.
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?8?of?16 keyboard?operation ?symbol?definitions: in?the?description?below,?signals?are?defined?in?terms?of?the?key?or?switch,?which?is?activated. off?hook means?the?phone?is?off?the?hook. on?hook means?the?phone?is?on?the?hook. d1 represents?for?the?first?digit?dialed?in?a?string?of?digits. dn?(dk) represents?for?the?last?digit?dialed?in?a?string?of?digits. dn+1 represent?for?the?beginning?of?a?new?string?of?digits. dn+m represents?for?the?last?digit?in?a?new?string?of?digits. hfi represents?for?the?switch?that?activates?the?hands-free?dialing?mode?going?low. */t is?the?pulse-to-dtmf?key. rd is?the?redial?key. 0 is?the?zero?key. p is?the?pause?key. f is?the?flash?key. ?recommended?operation 1.?pulse?mode?operation a.?off?hook????d1 ? ??dn pulse?mode?is?defined?as?the?intial?mode,?provided?the?first?keyboard?input?is?not?the??*/t?key?following?the off?hook?condition?and?the?mode?selection?pin?is?floating?(mode?in?=?vdd?or?floating). b.?on?hook hfi ???d1 ? ???dn pulse?mode?is?defined?as?the?initial?mode,?provided?the?key?input? ??d1?is?not? ?*/t?while?the?mode?selection pin?is?vdd?or?floating.?the?chip?will?pause?for?824?ms?automatically?after?it?detects?an??off-hook?condition?or?if?the hfi ?key?is?depressed.?it?then?proceeds?with?pulse?or?dtmf?dialing?if?any?keys?have?been?depressed. the?dialing?rate?or?make/break?ratio?is?decided?at?the?first? key?entry?by?checking?the?mode?in?status?and?will not?be?altered.?the?mode?in?status?can?only?switch?the?dialing?mode?from?pulse?to?dtmf?after?the?first?key ectry. 2.?dtmf?mode?operation a.?off?hook???d1 ? ???dn?or???on?hook hfi ???d1 ? ???dn dtmf?mode?is?defined?as?the?intial?mode?if?the?mode?selection?pin?mod?in?is?v ss . b.??off?hook???d1 ? ???dn?or???on?hook hfi ???*/t???d1 ? ???dn
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?9?of?16 the?initial?mode?is?pulse?mode?if?the?mode?selection?pin,?mode?in,?is?vdd?or?floating.?the? ??*/t?key?can switch?the?dialing?mode?to?tone?mode.?unlike?normal?mode?switching,?the? ??*/t?key?entry,?as?the?first?key pressed,? will?not?produce?any?pause?time,?there?are?only?31?digits?of?redial?memory?available?in?the?buffer?to?be used?for?operation?a?and?b,?since?the?mode?switching?key,???*/t,?will?occupy?one?digit?of?space. 3.?manual?dialing?with?automatic?access?pause a.??off?hook??o???p????d1 ? ???dn pause?key?entries?can?be?accepted?and?stored?and?stored?in?the?redial?memory.?each?is?stored?as?a?digit. each?key-in?will?provide?a?pause?of?3.57?seconds,?depending?on?which?model?is?being?used. 4.?redial a.??off?hook???rd?or??on?hook hfi ???rd up?to?32?digits?(in?pulse?mode)?or?31?digits?(in?tone?mode)?can?be?dialed?using?the??rd??key.?the??rd?key?is disabled? while? pulse? or? tone? signals? are? being? transmitted.? redial? will? also? be? inhibited? if? the? last? number dialed?exceeds?32?digits?because?the?redial?memory?can?only?hold?32?digits. b.??off?hook??rd???d1 ? ??dn??or??on?hook hfi ???rd???d1 ? ??dn after?pressing?the? ?rd? ?key,?digits?may?be?added?to?the?number?in?redial?memory.?when?finished?dialing,?the redial?memory?will?contain?the?original?digits,?plus?the?digits?dialed?after?pressing??rd? .?each?time?the?redial?key?is pressed,?the?stored?number?will?be?dialed?exactly?the?same?as?it?was?previously,?regardless?of?the?status?of?the mode?in?pin. 5.?tone/pulse?switch?operation a.??off?hook???d1 ? ??dn???mode?in?pin?switched?to?vss???dn+1 ? ?????dn+m ?????????????????????????????????????????????pulse?mode???????????????????????????????dtmf?mode the?mode?selection?pin?is?always?checked?for? tone?or?pulse?mode?key?entry.?dialing?can?be?switched?from pulse?to?tone?mode,?but?not?from?tone?to?pulse?mode.?switching?the?mode?in?pin?to?vss?will?cause?the chip? to? store? a? ? */t? ? digit? prior? to? first? tone? digit? in? the? redial? memory? and? will? automatically? insert? a? 2.2? second pause?before?the?tone?digits?are?dialed?out.?after?the?mode?has?been?switched,?the?status?of?the?mode?selection pin?will?no?longer?be?checked.?therefore,?it?will?not?be?possible?to?switch?from?tone?to?pulse?mode. b.??off?hook???d1 ? ?????dn???*/t???dn+1 ? ????dn+m ??????????????????pulse?mode??????????????????????dtmf?mode pulse?mode?is?initially? defined? with? the?mode? selection? pin,? mode?in,? equal? to? vdd? or? floating.? at? this? time, the?mode?can?be?switched?to?dtmf?by?pressing?the? ?*/t? ?key.?dtmf?mode?will?being?as?soon?as?the?last?pulse has? been? transmitted.? in? this? mode,? ? dn+1? ? through? ? dn+m? ? are? sent? through? the? tone? out? pin? as? dtmf signals.?if?a???p??key?entry?is?contained?in?the?series?of?digits?before?or?after?the??*/t??entry,?or?the?mode?in?switch is? depressed,? 2.2? second? pause? will? be? added? to? the? automatically? inserted? pause? time,? which? is? also? 3.57 seconds.?both?of?the?above?switching?modes?can?store?as?many?as?31?digits?in?the?redial?memory. 6.?one-key?redialing off-hook???d1 ? ??dn???rd??or??on?hook hfi ????d1 ? ??dn???rd
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?10?of?16 if?the?dialing?of??d1??to??dn??is?finished,?pressing??rd??will?cause?the?pulse?dialing?pin?to?go?low?for?67?seconds of?break?time?and?an?824?ms?pause?will?automatically?be?added.?if?the?pulses?of?the?number?dialed?with? ?d1??to dn??have?not?finished,?the?pressing?of?the?redial?key?will?be?ignored. 7.?flash?dialing off?hook???f???d1 ? ??dn??or??on?hook hfi ????f???d1 ? ??dn the?flash?key?emulate?quick?on-off?hook?operations.?pressing?the?flash?keys,??f1??or??f2?,?will?cause?a?break of?96?ms?or?640?ms?(or,?297?ms?or?640?ms,?depending?on?the?mode)?on?the dp ?output?pin.?then,?it?pauses?for 824?ms?and?continues?dialing?the?digits,??d1??to??dn?.?these?digits?are?then?stored?in?the?redial?memory. each? time? the? flash? key? is? pressed,? the? redial? memory? will? be? cleared? to? store? a? new? entry.? in? addition,? the mode?in?status?will?be?checked?again?for?the?setting?of?the?tone/pulse?dialing?mode. similarly,?to?make?sure?that?the?ic?is?working?properly,?new?flash?key?inputs?will?be?ignored?as?long?as?the?digits that?were?dialed?have?not?finished. test?circuit
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?11?of?16 timing?diagrams 1.timing?diagram?in?pulse?mode: 2.?timing?diagram?in?tone?mode (i)?normal?dialing ?(ii)?after?(i),?redialing
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?12?of?16 3.?timing?diagram?for?switching?mode?operation: (i)?by?mode?selection?pin?switches ?(ii)?by?*/t?key?entry tpau:?pause?time?(2.2?secs)
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?13?of?16 4.?one?key?redial?(dtmf?mode?used?as?example): taobk:?break?time?(2.2?secs) 5.?flash?dialing?(dtmf?mode?used?as?example):
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?14?of?16 typacal?application?circuit 47 - 3.9v 200 - 2m 8050 0. 47 - 100 k 0. 02 - 100 k 220 k 100 k a 42 1k 0. 47 - 0.1 - 100 k 8050 spe 8050 piezo led 100 pulse?tone 20 p 20 p
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?15?of?16 package?outline dip-16-300-2.54 unit:?mm 6 . 3 5 0 . 2 5 4 . 3 6 m a x 3 . 0 0 m i n 7 . 6 2 0 . 2 5 0 . 0 5 dip-18-300-2.54 unit:?mm
SC91214/91215?series hangzhou?silan?microelectronics?co.,ltd rev:1.0?????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?16?of?16 package?outline (continued) dip-20-300-2.54 unit:?mm 2. 54 15?degree 0. 51 26 .40.3 1. 27 0. 51min handling?mos?devices: electrostatic?charges?can?exist?in?many?things.?all?of?our?mos?devices?are?internally?protected?against electrostatic?discharge?but?they?can?be?damaged?if?the?following?precautions?are?not?taken: persons?at?a?work?bench?should?be?earthed?via?a?wrist?strap. equipment?cases?should?be?earthed. all?tools?used?during?assembly,?including?soldering?tools?and?solder?baths,?must?be?earthed. mos?devices?should?be?packed?for?dispatch?in?antistatic/conductive?containers.

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