sc72131 hangzhou?silan?microelectronics?co.,ltd rev:2.0????????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?1?of?11 pll?for?digital?tuning?system(dts) sdip-22-300-1.778 sop-20-300-1.27 description the? sc72131? is? phase- locked? loop? (pll)? lsi? for? digital? turning systems?(dts). the? lsi? is? use? to? configure? high- performance? digital? tuning systems,such? as? radio/cassette? players.? they? allow? high- performance am/fm?tuners?to?be?implemented?easily. features *? built- in? prescalers.? operate? at? input? frequency? ranging? from 10~160mhz? during? fmin? input? and? at? 0.5~40mhz? during? amin input. *?12?possible?reference?frequencies?(with?4.5?or?7.2?mhz?crystal) 1,?3, 5,?9,?10,?3.125,?6.25,?12.5,?15,?25,?50?and?100?khz *? built-in? 20bit? general- purpose? counter? for? such? as? measuring intermediate? frequency? (if),? if? input? frequency? ranging? from 0.4m~12mhz. *?has?an?unlock?detector?circuit an?dead?zone?control?circuit?and?an deadlock?clear?circuit *?built-in?mos?transistor?for?forming?an?active?low-pass?filter *? 4? n-channel? open-drain? output? ports? (off? withstanding voltage: 13v)?and?2?input?or?output?ports. *?serial?data?i/o ? ?all?functions?controlled?through?4?serial?bus?lines *?operating?ranges ? ?supply?voltage.....................? 5.0 0.5?v ? ?operating?temperature........?40?to?+85?c *??packages ? sdip-22-300-1.78 ? sop-20-300-1.27 ordering?information part?no. package sc72131 sdip-22-300-1.778 SC72131S? sop-20-300-1.27 applications *??digital?tuning?systems
sc72131 hangzhou?silan?microelectronics?co.,ltd rev:2.0????????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?2?of?11 block?diagram absolute?maximum?ratings ?(tamb=25 c,?vss=0v) characteristics symbol ratings unit supply?voltage v ddmax -0.3?to?7.0 v allowable?power?dissipation p dmax 350 mw n-ch?open-drain?off?withstanding?voltage v off 13 v operating?temperature t opr -40?to?+85 c electrical?characteristics (tamb=-40?to?85 c,?vss=0v) (to?be?continued) characteristics symbol test?condition min. typ. max. unit r f1 1.0 m w r f2 500 k w r f3 500 k w built-in?feedback?resistance r f4 250 k w r pd1 200 k w built-in?pull-down?resistor r pd2 200 k w hysteresis v his 0.1v dd v output?high?level?voltage v oh1 ?i o =-1ma v dd -1.0 v
sc72131 hangzhou?silan?microelectronics?co.,ltd rev:2.0????????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?3?of?11 (continued) characteristics symbol test?condition min. typ. max. unit v ol1 ?i o =1ma 1.0 v i o =0.5ma 0.5 v v ol2 i o =1ma 1.0 v i o =1ma 0.2 v v ol3 i o =5ma 1.0 v i o =1ma 0.2 v i o =5ma 1.0 v v ol4 i o =8ma 1.6 v output?low?level?voltage v ol5 ?i o =1ma,?a in =1.3v 0.5 v i ih1 ?v i =6.5v 5.0 m a i ih2 ?v i =13v 5.0 m a i ih3 ?v i =v dd 2.0 11 m a i ih4 ?v i =v dd 4.0 22 m a i ih5 ?v i =v dd 8.0 44 m a input?high?level?current i ih6 ?v i =6.5v 200 na i il1 ?v i =0 5.0 m a input?low?level?current i il2 ?v i =0 5.0 m a i il3 ?v i =0 2.0 11 m a i il4 ?v i =0 4.0 22 m a i il5 ?v i =0 8.0 44 m a input?low?level?current i il6 ?v i =0 200 m a i off1 ?v o =13 5.0 m a output?off?leakage?current i off2 ?v o =6.5v 5.0 m a high?level?three- state?off?leakage current i offh ?v o =v dd 0.01 200 na low?level?three-state?off?leakage current i offl ?v o =0v 0.01 200 na input?capacitance c in 6 pf i dd1 x tal =7.2mhz, f in2 =130mhz, v in2 =40mvrms 5 10 ma i dd2 pll?block?stopped?(pll inhibit),?xtal?oscillator operating?(x tal =7.2mhz) 0.5 ma current?drain i dd3 pll?block?stopped,?xtal oscillator?stopped 10 m a
sc72131 hangzhou?silan?microelectronics?co.,ltd rev:2.0????????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?4?of?11 pin?configuration (sdip22,?sop20) pin?description pin?no. sdip-22 sop-20 pin?name description 1 1 oscin 22 20 oscout connects? 4.5m? or? 7.2m? crystal? oscillator? to? supply? reference frequency?and?internal?clock. 2 nc -- 3 2 period 4 3 din 5 4 clock 6 5 dout serial?i/o?ports,?these?pins?transfer?data?to?and?from?the?controller to?set?divisors?and?dividing?modes,?and?to?control?the?general- purpose?counter?and?general-purpose?i/o?ports. 7 6 ot1 8 7 ot2 9 8 ot3 10 9 ot4 ??n?channel?open?drain?port?pins. ??the?output?states?are?determined?by ot1 ?to ot4 ?bits?in?the?serial data. ??if?the?serial?data?tbc?bit?is?set?to?1,?a?time?base?signal?(8hz)?can be?output?from?the ot1 ?pin. ???these?pins?are?set?to?the?off?state?when?power?is?turn?on. 11 10 1 io 13 12 2 io ??cmos?structure?allows?free?use?of?these?ports?for?input?or?output. ??ports?are?set?for?input?when?the?power?is?turned?on. 12 11 ifin ??input?pin?for?measure?general-purpose?counter?frequencies.?the frequency?measurement?function?has?such?uses?as?measuring intermediate?frequencies?(if) ??these?pin?feature?built-in?amps,?data?are?input?by?capacitor coupling. (to?be?continued)
sc72131 hangzhou?silan?microelectronics?co.,ltd rev:2.0????????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?5?of?11 (continued) pin?no. sdip-22 sop-20 pin?name description 14 nc -- 15 13 amin 16 14 fmin ?? these? pins? input? am? and? fm? band? local? oscillator? signals? by capacitor?coupling. ??these?pins?feature?built-in?amps. 17 15 v dd ??power?supply?pin?(applies?5.0v 10%) 18 16 do ??this?pin?is?for?phase?comparator?tristate?output. 19 17 lfin 20 18 lfout ??these?pins?for?low-pass?filter?input?pin?and?output?pin. 21 19 gnd ??the?sc72131?ground. function?description serial?data?i/o?methods the?sc72131?inputs?and?outputs?data?using?the?4?serial?bus?lines,?the?serial?data?i/o?methods?are?selected?by an?8bit?address register?assignments ???address?=?82h(in) p0 p1 p2 p3 p4 p5 p6 p7 p8 p9 p10 p11 p12 p13 p14 p15 mode fm cte osc r0 r1 r2 r3 address?=?92h(in) io c1 io c2 1 io 2 io ot1 ot2 ot3 ot4 * do c0 do c1 do c2 ul 0 ul 1 dz 0 dz 1 g0 g1 to d o c if s t0 t1 t2 address?=?a2h?(out) i1 i2 * ul if1 9 if1 8 if1 7 if1 6 if1 5 if1 4 if1 3 if1 2 if1 1 if1 0 if9 if8 if7 if6 if5 if4 if3 if2 if1 if0 programmable?divider?structure ??swallow?counter?and?programmable?counter?circuit?configuration
sc72131 hangzhou?silan?microelectronics?co.,ltd rev:2.0????????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?6?of?11 fm mode input?pin set?divisor actual?divisor:?n input?frequency?range?(mhz) 1 * fmin 272?to?65535 twice?the?set?value 10?to?160 0 1 amin 272?to?65535 the?set?value 2?to?40 0 0 amin 4?to?4095 the?set?value 0.5?to?10 note:?*?don?t?care. 1.if?counter?structure the?sc72131?if?counter?section?consists?of?input?amp,?a?gate?time?control?circuit?and?a?20bit?binary?counter. the?result,?i.e.,?the?counter?s?msb,?can?be?read?serially?from?the?dout?pin. g1 g0 gate?time??(gt)?(ms) wait?time?(ms) 0 0 4 3?~?4 0 1 8 3?~?4 1 0 32 7?~?8 1 1 64 7?~?8 2.?if?counter?operation note:??1.?ifin?input?have?built-in?amp.?data?are?input?by?capacitor?coupling. ?2.?before?starting?the?if?count,?the?if?counter?must?be?reset?in?advance?by?setting?cte?in?the?serial?data?to?0. 3.?the?if?count?is?started?by?changing?the?cte?bit?in?the?serial?data?from?0?to?1.?the?serial?data?is?latched by?the?sc72131?when?the?ce?pin?is?dropped?from?high?to?low. 4.the?if?signal?must?be?supplied?to?the?ifin?pin?in?the?period?between?the?point?the?ce?pin?goes?low?and the?end?of??the?wait?time?at?the?latest. 5.?the?value?of?the?if?counter?at?the?end?of?the?gate-time?must?be?read?out?during?the?period?that?cte?is 1.?this?is?because?the?if?counter?is?reset?when?cte?is?set?to?0. 6.?when? operating? the?if? counter,? the? control?microprocessor? must? first? check? the? state? of? the? if-ic? sd (station?detect)?signal? and? only? after? determining?that?the? sd? signal?is? present? turn?on?if? buffer? output
sc72131 hangzhou?silan?microelectronics?co.,ltd rev:2.0????????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?7?of?11 and? execute? an? if? count? operation.? auto? search? techniques? that? use? only? the? if? counter? are? not recommended,? since?it? is?possible?for?if?buffer?leakage?output?to?cause?incorrect?stops?at? points?where there?is?no?station. 3.?power?supply?pins a? capacitor? of? at? least? 2000? pf? must? be? inserted? between? the? power? supply? vdd? and? gnd? pins? for? noise exclusion.?this?capacitor?must?be?placed?as?close?as?possible?to?the?vdd?and?gnd?pins. pin?states?after?the?power?on?reset after?power-on?reset,?the?pins?(dout ot1 ot2 ot3 ot4 )?are?set?to?open?state?and?the?pins??( 1 io , 2 io )?set to?input?state. note:?this?circuit?according?to?sdip-22?package,?and?the?circuit?of?sop-20?removed?two?nc?pins,?and?others?are the?same?as?the?above?circuit.
sc72131 hangzhou?silan?microelectronics?co.,ltd rev:2.0????????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?8?of?11 typical?application?circuit oscin clock ot 1 ot 3 ot 2 dout io 1 ot 4 period din oscout gnd lfout lfin do v dd fmin amin io 2 ifin - com ce di cl do fmvco amvco v cc tune fm / am - if if - request fm / am mono / bt st - indicate tuner - system this?section?is?susceptible?to?noise due?to?its?high?impedance.?therefore , the?pattern?lines?should?be?kept?as short?as?possible?and?this?area?should be?covered?with?a?ground?pattern . nc nc 1 3 4 5 6 8 9 2 7 11 10 12 1 15 14 16 17 18 19 20 21 22 note:?this?circuit?according?to?sdip-22?package,?and?the?circuit?of?sop-20?removed?two?nc?pins,?and?others?are the?same?as?the?above?circuit.
sc72131 hangzhou?silan?microelectronics?co.,ltd rev:2.0????????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?9?of?11 package?outline sdip-22-300-1.778 unit:?mm sop-20-300-1.27 unit:?mm 12 . 70 0. 25 11 . 43 1. 27 0. 45 2. 25max 0. 15 0. 05
sc72131 hangzhou?silan?microelectronics?co.,ltd rev:2.0????????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?10?of?11 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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