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SC50462 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2005.12.15 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?1?of?12 infrared?remote?control?transmitter?of?50462?code?format description ???the? SC50462? is? a? remote? control? transmitter? utilizing? cmos technology?specially?designed?for?use?on?infrared?applications.?it?has?64 functions?and?a?total?of?76?commands?can?be?transmitted.?housed?in?24 pins?dip?package,?SC50462?has?2?address?bits. features ??*?high?performance?cmos?technology *?low?power?consumption ??*?least?external?components. *?up?to?76?instructions *?double?key?operation?is?possible. applications *?television?remote?control?transmitter ?*?video?cassette?recorder(vcr)?remote?control?transmitter ordering?information device package SC50462? sdip-24-300-2.54 SC50462s sop-24-375-1.27 block?diagram k e y e n c o d e r
SC50462 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2005.12.15 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?2?of?12 absolute?maximum?ratings (t amb =25 c) characteristic symbol ratings unit supply?voltage v cc -0.3?~?5.5 v input?voltage v in v ss -0.3v?~?v cc +0.3v v output?voltage v out ?v ss ?~?v cc v power?dissipation p d 300 mw operating?temperature t opr -10?~?+70 c storage?temperature t stg -40?~?+125 c electrical?characteristics (t amb =25 c,v cc =3.0v,v ss =0,unless?otherwise?specified) parameter symbol test?conditions min typ max unit operating?supply?voltage v cc t amb =20?~?70 c 1.8 3 5 v operating?supply?current i cc1 f osc =455khz 0.3 ma stand-by?current i cc2 1 m a high?level?output?current( out ) i oh v oh =2v 5 ma low?level?output?current( out ) i ol v ol =1v -3 ma high?level?output?current( cntr ) i oh v oh =2v 1 ma low?level?output?current( cntr ) i ol v ol =1v -3 ma pin?configuration 15 16 14 12 13 2 1 3 5 4 6 7 8 9 10 11 19 20 18 17 23 24 22 21 vss osci osco cntr i1 i2 i3 i4 i5 i6 i7 i8 s1 s2 s3 s4 s5 s6 s7 s8 c4 c5 out vcc s c 5 0 4 6 2
SC50462 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2005.12.15 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?3?of?12 pin?description pin?no. pin?name description 1,24 v ss ,?v cc power?supply:?v cc =3.0v,v ss =0v 2,3 osci,osco oscillator?input/output?pin,?455?or?480khz?crystal?is?connected?between?these pins. 4 cntr transmitting?indicator.?an?led?and?resistor?are?connected?from?this?pin?to?vcc. 5~12 i1~i8 key?scan?signal?input?pins. 13~20 s1~s8 key?scan?signal?output?pins. 21,22 c4 c5 , custom?code 23 out modulation?pin functional?description ??????SC50462?is?a?sending?signal?ic?on?infrared?remote?control.?consisting?of?timing?generating?circuit,?scan?signal generating?circuit,?key?input?encoder,?instruction?decoder,?custom?code?circuit,?code?encoder,?and?output?buffer.?it has?8*8?key?matrix?input?and?custom?code?with?16?bit?pcm?which?shows?76?instructions.76instruction?are?devided in?64?one?shot?signal?and?12?2-shot?signal. ?????when?input?signal(i1~i8)?and/or?in?combination?with?the?scan?signals(s1~s8)?are?activated,?SC50462?checks the?id?and?the?custom?code?bits-- 4 c and 5 c --setting?before?finally?sending?out?the?remote?control?signal. 1. cntr ?output ??????the cntr ?pin?is?the?led?transmission?indicator.?this?means?that?whenever?a?valid?transmission?is?sent,?the led?lights?up.?the cntr output?becomes??l??in?the?7 th ?pulse-rising?and??h??in?the?17 th ?pulse-rising. note:?oscillator?frequency=480?or?455khz 2.?oscillating?circuit ???an?oscillator?circuit?may?be?constructed?by?using?a?480khz?or? 455khz?crystal?resonator?and?two?capacitors. please? refer? to? the? following?diagram.? the? carrier? frequency? transmitted? is? 40khz? or? 37.9khz.unless? any? legal key?input?is?activated,?the?oscillation?is?automatically?stopped.?thus?,power?consumption?is?considerably?reduced.
SC50462 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2005.12.15 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?4?of?12 3.?key?input ?????a?total?of?64?keys?may?be?connected?by?input?pins(i1~i8)?and?output?pins(s1~s8)?to?form?an?8x8?key?matrix. double?key?operation?is?possible?for?only?one?of?the?keys? sw25~sw28?in?combination?with?any?one?of?the?keys ?sw11~sw13.?any?other?key?combination?are?regards?as?illegal?and?will?not?generate?any?activity.?thus,?only?the following?key?combinations?may?be?used?for?the?doubled?key?operation: s1 s2 s3 s4 s5 s6 s7 s8 i8 i7 i6 i5 i4 i3 i2 i1 sw11 sw12 sw13 sw25 sw26 sw27 sw28 sw25?and?sw11 sw25?and?sw12 sw25?and?sw13 sw26?and?sw11 sw26?and?sw12 sw26?and?sw13 sw27?and?sw11 sw27?and?sw12 sw27?and?sw13 sw28?and?sw11 sw28?and?sw12 sw28?and?sw13 note: SC50462?permits?two?keys?function?but only?? ??key?are?allowed. when?you?push?one?key?of?sw11/12/13, you?can?push?with?another?key?of sw25/26/27/28.?otherwise,?other conditions?are?illegal. 4.?transmission?code the?transmission?code?consists?of?16?bits,?namely:?8?bits?custom?code(c0~c7?)?and?8?bits?data?code?(d0~d7). please?refer?to?the?table?below: c0 c1 c2 c3 c4 c5 c6 c7 d0 d1 d2 d3 d4 d5 d6 d7 custom?code data?code ?one?frame?of?the?transmission?code if? a?single?shot? key?is?depressed,? data??codes? d6?and?d7?will?be?given?the?value?of?(0,0).please?refer?to?the table1.if?a?valid?double?key?operation?is?performed,?the?data?codes?will?receive?the?values?described?in?table?2. table?1:?key?matrix/code data scan?output d0 d1 d2 octal?display s1 0 0 0 0 s2 1 0 0 1 s3 0 1 0 2 s4 1 1 0 3 s5 0 0 1 4 s6 1 0 1 5 s7 0 1 1 6 s8 1 1 1 7
SC50462 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2005.12.15 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?5?of?12 data key?input d3 d4 d5 octal?display i1 0 0 0 0 i2 1 0 0 1 i3 0 1 0 2 i4 1 1 0 3 i5 0 0 1 4 i6 1 0 1 5 i7 0 1 1 6 i8 1 1 1 7 table?2:?double?key?signal/code data?code octal?display scan?output d0 d1 d2 d3 d4 d5 d6 d7 d0~d2 d3~d5 d6~d7 s5/i2?(sw25) 0 0 1 1 0 0 1 0 4 1 1 s6/i2?(sw26) 1 0 1 1 0 0 1 0 5 1 1 s7/i2?(sw27) 0 1 1 1 0 0 1 0 6 1 1 s1/i1 (sw1 1) s8/i2?(sw28) 1 1 1 1 0 0 1 0 7 1 1 s5/i2?(sw25) 0 0 1 1 0 0 0 1 4 1 2 s6/i2?(sw26) 1 0 1 1 0 0 0 1 5 1 2 s7/i2?(sw27) 0 1 1 1 0 0 0 1 6 1 2 s2/i1 (sw1 2) s8/i2?(sw28) 1 1 1 1 0 0 0 1 7 1 2 s5/i2?(sw25) 0 0 1 1 0 0 1 1 4 1 3 s6/i2?(sw26) 1 0 1 1 0 0 1 1 5 1 3 s7/i2?(sw27) 0 1 1 1 0 0 1 1 6 1 3 s3/i1 (sw1 3) s8/i2?(sw28) 1 1 1 1 0 0 1 1 7 1 3 5.?custom?code ????SC50462?has?a?total?of?8?bits?custom?code?(c0~c7).?custom?code?bits??c4?and?c5?can?be?externally?selected using? the 4 c and 5 c ?terminals.? the 4 c and 5 c ?pins? are? inversed;? therefore,? if? ? the 4 c and 5 c terminals? are pulled?high,?then?the?custom?code?bits? c4?and?c5?would?have?the?value(0,0).?likewise,?when?pulled?low, then?c4?and?c5?bits?will? be?(1,1),the?other? customs?code?bits,namely:c0~c3?and?c6,c7? are?fixed?at?(1,1,1,0) and?(1,0?): ????the?waveform?of?bits?are?given?below: 0.25/0.26ms 1.00/1.05ms 2.00/2.10ms bit?"0" bit?"1" note:?oscillator?frequency=480?or?455khz
SC50462 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2005.12.15 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?6?of?12 6.?key?on?timing ??????when?any?key?is?pressed,?the?output?pin-- out continuously?generates?the?waveform?described?below?until the?key?is?released. key?on out 1st frame 2nd frame n-th frame 44ms/46.4ms note:?oscillator?frequency=480?or?455khz 7.?carrier?waveform ??????the?following?is?the?carrier?waveform?diagram.?a?bit?modulates?10?carrier?waveforms. 10 pulses 1?bit carrier wave a 2a 1/3?duty?cycle a=?8.3 s/8.76 s note:?oscillator?frequency=480?or?455khz
SC50462 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2005.12.15 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?7?of?12 typical?application?circuit
SC50462 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2005.12.15 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?8?of?12 chip?topography 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 23 24 size:?1.96?x?2.07mm 2 pad?coordinates ?(unit: m m) no. symbol x y no. symbol x y 1 p1 -904.75 -122.00 13 p13 906.00 54.50 2 p2 -904.75 -258.25 14 p14 906.00 154.00 3 p3 -904.75 -709.00 15 p15 906.00 362.50 4 p4 -450.25 -851.25 16 p16 906.00 571.00 5 p5 -200.25 -851.25 17 p17 739.00 854.75 6 p6 80.75 -851.25 18 p18 530.50 854.75 7 p7 220.75 -851.25 19 p19 322.00 854.75 8 p8 501.75 -851.25 20 p20 113.50 854.75 9 p9 641.75 -851.25 21 p21 -564.75 854.75 10 p10 906.00 -615.50 22 p22 -773.25 854.75 11 p11 906.00 -475.50 23 p23 -904.75 248.00 12 p12 906.00 -194.50 24 p24 -857.00 12.00 note:?the?original?point?of?the?coordinate?is?the?die?center.
SC50462 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2005.12.15 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?9?of?12 pcb?wire?layout?schematic transmitting?tube?output?ground?line the?transmitting?tube?ground?line?and?ic?ground?line?should layout?separated?or?overstriking?ground?line. the?above?ic?only?use?to?hint,?not?to?specified. note: *?in?wire?layout,?the?power?filter?capacitor?should?near?to?ic. *?in?wire?layout,?should?avoid?power?line?and?ground?line?too?long. *?recommended?infrared?transmit?unit?and?ic?ground?line?should?layout?separated,?or?overstriking?lines. *?the?emitter?of?triode?connect?1 ? ?resistor?at?least.
SC50462 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2005.12.15 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?10?of?12 package?outline sdip-24-300-2.54 unit:?mm 7 . 6 2 0 . 2 5 0 . 0 5 4 . 3 6 m a x 3 . 0 0 m i n 6 . 4 0 0 . 2 5 sop-24-375-1.27 unit:?mm 15 . 34 0. 25 13 . 97 1. 27 0. 40 3. 10max 0. 25 0. 05
SC50462 hangzhou?silan?microelectronics?co.,ltd ?rev:2.2???????2005.12.15 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?11?of?12 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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