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rev 1.00 1 june 23, 2010 HT6P20B2/d2/f2 remote control encoder features operatingvoltage:2~12v lowpowerconsumption upto5datapins upto2 22 addresscodes fullyintegratedoscillator easyinterfacingtorfmedium cmostechnology highnoiseimmunity 8-pinsop package application burglar alarmsystems smokeandfrealarmsystems personalalarmsystems car/garagedoorcontrollers home/offce/carsecuritysystems cordlesstelephones otherremotecontrolsystems general.description the ht6p20x2 series of devices are signal encoders designed for remote control system applications. the devices are capable of encoding 24 bits of information and then serially transmitting the data on their output pin. a signal transmission is automatically activated when any of the data input lines change from high to low. the device generates a signal on its output pin which is composed of a pilot signal, address codes, data codes and an end code. this can be sent to rf transmitter circuits for wireless transmission. various confgurations of address and data bits can be chosen according to which device is selected. as all functions are integrated into the device, the simple addition of switches and rf module is that is required to implement a full rf encoder function. alldevicesaresuppliedin8-pinsop packages. selection. table the devices encodes 24-bits of information however the address/data combination is selected accordingtowhichpartnumberisselected. part.number address data HT6P20B2 22 2 ht6p20d2 20 4 ht6p20f2 19 5 datasheet.in
rev 1.00 2 june 23, 2010 HT6P20B2/d2/f2 remote control encoder block.diagram code generation mix data / address system timing control unit data latch vdd vss dout d 0 d 3 d 2 d 1 d 4 internal rc oscillator note: addressanddatacombinationsareavailableinvariousformats. pin. assignment

pin.description pin.name type description vdd D positive power supply vss D negative power supply d0~d4 i data input and transmission enable - active low connected to internal pull-high resistor pins can be pulled low or left open dout o data serial transmission output pin output normally low when not transmitting approximate.internal.equivalent.circuits datasheet.in
rev 1.00 3 june 23, 2010 HT6P20B2/d2/f2 remote control encoder absolute.maximum.ratings supply voltage ................................................................................................. v ss -0.3v to v ss +15v input voltage .................................................................................................. v ss -0.3v to v dd +0.3v output voltage ................................................................................................. v ss -0.3v to v dd +0.3v storage temperature .................................................................................................. -55 cto150c operating temperature ................................................................................................ -40 cto85 c note: these are stress ratings only. stresses exceeding the range specified under absolute maximum ratings may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specifcation is not implied and prolonged exposure to extreme conditionsmay affectdevice reliability. d.c..characteristics ta=25c symbol parameter test .conditions min. typ. max. unit v dd conditions v dd supply voltage D D 2 D 12 v i sb stand-by current 12 no load input pins foating D D 1.0 a i op operating current 5 no load single data input pin low D 30 100 a 12 D 300 500 v ih h input voltage D D 0.8v dd D D v v il l input voltage D D D D 0.2v dd v r ph pull-high resistor 5 d0~d4 D 400 800 k 12 D 150 300 i oh hi-level output current 5 v oh =0.9v dd ; dout -2 -2.5 D ma 12 -6.5 -15 D ma i ol low-level output current 5 v ol =0.1v dd ; dout 2 2.5 D ma 12 6.5 15 D ma t dw single bit data width 5 D 1.08 1.2 1.32 ms note:singlebitdatawidth(t dw )vs. v dd curveisshownasbelow: t dw vs. v dd 0 0.5 1 1.5 2 2.5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 v dd (v) t dw (ms) datasheet.in
rev 1.00 4 june 23, 2010 HT6P20B2/d2/f2 remote control encoder functional.description the ht6p20x2 series of remote control devices provide a means for easy remote control signal encoding. as all functions, including the system oscillator, are integrated within the devices, the addition of external switches and an rf transmitter is all that is required to implement a full remote controltransmitterfunction. the devices will generate an encoded signal on their output pin, dout, composed of pilot code, address code, data code and end code. the signal is automatically generated on the dout pin when any of the data input pins, d0~d4, change from high to low. internal pull-high resistors keep these data input pins in a normally high condition. the output signal can be interfaced to rf modules for wirelesssignaltransmission. signal.generation the devices will encode and transmit pilot code, address/data and end code, upon receiptof a trigger signal. the trigger signal is a high to low transition on any of the data input pins, d0~d4. the pins arenormallykeptatahighlevelbyinternalpull-highresistors. code. word what is known in this datasheet as a code word is a packet of information composed of pilot code, address code, data code and end code. the pilot code and end code is the same for all devices. the addressanddatacombinationsareshowninthefollowingsignaldescriptions. HT6P20B2 pilot code a0~a21 d1~d0 end code (0101) ht6p20d2 pilot code a0~a19 d3~d0 end code (0101) ht6p20f2 pilot code a0~a18 d4~d0 end code (0101) the following shows a complete code word transmission signal. note that if the data lines remain lowthenthesignalwillbecontinuouslytransmitted. dout d 0 ~ d 4 1 ms max . addree / data / end code pilot code vdd vss vdd vss signal. trigger signal transmission is initiated when any of the data input pins change from high to low. note that the duration of the data input low signals must be greater than the pilot code length for a full signal transmission to occur. if the input low signal is less than the pilot code length then only the pilot codesignalwillbetransmittedandnoaddress,dataorendcodewillbetransmitted. d 0 ~ d 4 dout 1 code word pilot code pilot code active 1 code word 1 code word datasheet.in
rev 1.00 5 june 23, 2010 HT6P20B2/d2/f2 remote control encoder pilot.code each transmission has a pilot code preceding the address and data codes. this is to alert the decoder thataddress anddatabitsareabouttobetransmitted. thepilotcodewaveformiscomposedofalow pulse of 23? duration followed by a high pulse of 1? duration. note that a 1time unit is equal to 32 internaloscillatortimeperiods. the pilot code is initiated when any of the data input pins change from high to low. note that the duration of the data input low signals must be greater than the pilot code length for a full signal transmission to occur. if the input low signal is less than the pilot code length then only the pilot codesignalwillbetransmittedandnoaddress,dataorendcodewillbetransmitted. 1 23 address/data.bit. waveform as address/data bits can be designated as either 0 or 1 they must be encoded in a certain way. one bit consists of one pulse cycle and each pulse cycle has a duration of 96 internal oscillator periods. t dw bit 0 bit 1 address / data bit 1 2 1 2 note:1?=32internaloscillatortimeperiods. bit0consistsofalowpulsefor1?thenahighpulsefor2. bit1consistsofalowpulsefor2?thenahighpulsefor1. end.code. waveform the end code is located after the address/data and consists of 4 bits of data with the bit pattern 0101 asshownbelow endcode ( 0- 1- 0- 1) bit 0 " bit 1 " bit 0 " bit 1 " msb lsb datasheet.in
rev 1.00 6 june 23, 2010 HT6P20B2/d2/f2 remote control encoder operation.flowchart power on stand - by mode data input pin in low state 1 word of pilot code / address / data / end code transmitted yes no yes no data input pin still in low state datasheet.in
rev 1.00 7 june 23, 2010 HT6P20B2/d2/f2 remote control encoder application.circuit HT6P20B2 vbat l 1 r 1 r 2 c 3 c 2 c 1 led npn ant vdd vss d 1 d 0 nc ht 6p 20b 2 dout c 4 1 2 3 4 5 6 7 8 s 1 s 2 r 3 nc nc ht6p20d2 ht 6p 20d 2 vbat l 1 r 1 r 2 c 3 c 2 c 1 led npn ant vdd vss d 3 d 1 d 2 d 0 dout c 4 1 2 3 4 5 6 7 8 s 1 s 2 s 3 s 4 r 3 nc datasheet.in
rev 1.00 8 june 23, 2010 HT6P20B2/d2/f2 remote control encoder ht6p20f2 ht 6p 20f 2 vbat 2 . 2 uh r 1 r 2 c 3 c 2 c 1 led npn ant vdd vss d 3 d 1 d 2 d 0 d 4 dout c 4 1 2 3 4 5 6 7 8 s 1 s 2 s 3 s 4 r 3 s 5 datasheet.in
rev 1.00 9 june 23, 2010 HT6P20B2/d2/f2 remote control encoder package.information 8-pin.sop .(150mil).outline.dimensions . ms-012 symbol dimensions.in.inch min. nom. max. a 0.228 D 0.244 b 0.150 D 0.157 c 0.012 D 0.020 c 0.188 D 0.197 d D D 0.069 e D 0.050 D f 0.004 D 0.010 g 0.016 D 0.050 h 0.007 D 0.010 0 D 8 symbol dimensions.in.mm min. nom. max. a 5.79 D 6.20 b 3.81 D 3.99 c 0.30 D 0.51 c 4.78 D 5.00 d D D 1.75 e D 1.27 D f 0.10 D 0.25 g 0.41 D 1.27 h 0.18 D 0.25 0 D 8 datasheet.in
rev 1.00 10 june 23, 2010 HT6P20B2/d2/f2 remote control encoder reel.dimensions . sop .8n symbol description dimensions.in.mm a reel outer diameter 330.01.0 b reel inner diameter 100.01.5 c spindle hole diameter 13.0 +0.5/-0.2 d key slit width 2.00.5 t1 space between flange 12.8 +0.3/-0.2 t2 reel thickness 18.20.2 datasheet.in
rev 1.00 11 june 23, 2010 HT6P20B2/d2/f2 remote control encoder carrier. tape.dimensions

. sop .8n symbol description dimensions.in.mm w carrier tape width 12.0 +0.3/-0.1 p cavity pitch 8.00.1 e perforation position 1.750.1 f cavity to perforation (width direction) 5.50.1 d perforation diameter 1.550.1 d1 cavity hole diameter 1.50 +0.25/-0.00 p0 perforation pitch 4.00.1 p1 cavity to perforation (length direction) 2.00.1 a0 cavity length 6.40.1 b0 cavity width 5.20.1 k0 cavity depth 2.10.1 t carrier tape thickness 0.300.05 c cover tape width 9.30.1 datasheet.in
rev 1.00 12 june 23, 2010 HT6P20B2/d2/f2 remote control encoder holtek.semiconductor.inc..(headquarters) no.3, creation rd. ii, science park, hsinchu, taiwan tel: 886-3-563-1999 fax: 886-3-563-1189 http://www.holtek.com.tw holtek.semiconductor.inc.. (taipei.sales.offce) 4f-2, no. 3-2, yuanqu st., nankang software park, taipei 115, taiwan tel: 886-2-2655-7070 fax: 886-2-2655-7373 fax: 886-2-2655-7383 (international sales hotline) holtek.semiconductor.inc..(shenzhen.sales.offce) 5f, unit a, productivity building, no.5 gaoxin m 2nd road, nanshan district, shenzhen, china 518057 tel: 86-755-8616-9908, 86-755-8616-9308 fax: 86-755-8616-9722 holtek.semiconductor.(usa),.inc..(north. america.sales.offce) 46729 fremont blvd., fremont, ca 94538, usa tel: 1-510-252-9880 fax: 1-510-252-9885 http://www.holtek.com copyright ? 2010 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publication. however, holtek assumes no responsibility arising from the use of the specifications described. the applications mentioned herein are used solely for the purpose of illustration and holtek makes no warranty or representation that such applications will be suitable without further modifcation, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. holtek's products are not authorized for use as critical components in life support devices or systems. holtek reserves the right to alter its products without prior notifcation. for the most up-to-date information, please visit our web site at http://www.holtek.com.tw . datasheet.in

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