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3 12 series of decoders 1 december 13, 1999 general description the 3 12 decoders are a series of cmos lsis for remote control system applications. they are paired with 3 12 series of encoders. for proper operation a pair of encoder/decoder with the same number of address and data format should be selected (refer to the encoder/decoder cross reference tables). the 3 12 series of decoders receive serial address and data from its corredponding series of encoders that are transmitted by a carrier us- ing an rf or an ir transmission medium. then it compares the serial input information twice continuously with its local address. if no errors or unmatched codes are encountered, the input data codes are decoded and transferred to the output pins. the vt pin also goes high to indi- cate a valid transmission. the 3 12 series of decoders are capable of decod- ing 12 bits of information that consists of n bits of address and 12 n bits of data. to meet vari- ous applications they are arranged to provide a number of data pins ranging from 0 to 4 and an address pin ranging from 8 to 12. thus, various combinations of address/data number are available in different packages. features operating voltage: 2.4v~12v low power and high noise immunity cmos technology low standby current capable of decoding 12 bits of information pair with holtek s3 12 series of encoders 8~12 address pins 0~4 data pins trinary address setting received data are checked two times built-in oscillator needs only 5% resistor vt goes high during a valid transmission easy interface with an rf or an infrared transmission medium minimal external components package information: refer to selection table applications burglar alarm system smoke and fire alarm system garage door controllers car door controllers car alarm system security system cordless telephones other remote control systems
selection table function address no. data vt oscillator trigger package part no. no. type ht6030 12 0 rc oscillator din active hi 18 dip/20 sop ht6032 10 2 l rc oscillator din active hi 18 dip/20 sop ht6034 8 4 l rc oscillator din active hi 18 dip/20 sop note: data type: l stands for latch type data output. vt can be used as a momentary data output. block diagram note: the address/data pins are available in various combinations (refer to the address/data table). 3 12 series of decoders 2 december 13, 1999

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pin assignment 3 12 series of decoders 3 december 13, 1999
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pin description pin name i/o internal connection description a0~a11 i transmission gate input pins for address a0~a11 setting they can be externally set to vdd, vss, or left open. d8~d11 o cmos out output data pins din i cmos in serial data input pin vt o cmos out valid transmission, active high osc1 i oscillator oscillator input pin osc2 o oscillator oscillator output pin vss negative power supply, ground vdd positive power supply approximate internal connections absolute maximum ratings supply voltage............................... 0.3v to 13v storage temperature................. 50 cto125 c input voltage....................v ss 0.3 to v dd +0.3v operating temperature .............. 20 cto75 c note: these are stress ratings only. stresses exceeding the range specified under absolute maxi - mum ratings may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged expo - sure to extreme conditions may affect device reliability. 3 12 series of decoders 4 december 13, 1999 $- ## $ . - #$ # " - / ! .$
electrical characteristics ta=25 c symbol parameter test conditions min. typ. max. unit v dd conditions v dd operating voltage 2.4 5 12 v i stb standby current 5v oscillator stops 0.1 1 a 12v 24 a i dd operating current 5v no load f osc =100khz 250 500 a i o data output source current (d8~d11) 5v v oh =4.5v 0.5 1 ma data output sink current (d8~d11) 5v v ol =0.5v 0.5 1 ma i vt vt output source current 5v v oh =4.5v 2 4 ma vt output source current only for ht6033/35/45 0.35 0.6 vt output sink current v ol =0.5v 12 vt output sink current only for ht6033/35/45 0.35 0.6 v ih h input voltage 5v 3.5 5v v il l input voltage 5v 0 1v f osc oscillator frequency 5v r osc =91k 100 khz 3 12 series of decoders 5 december 13, 1999
3 12 series of decoders 6 december 13, 1999 functional description operation the 3 12 series of decoders provide various com - binations of address and data pins in different packages. they are paired with 3 12 series of encoders. the decoders receive data transmit - ted by the encoders and interpret the first n bits of the code period as addresses and the last 12 n bits as data (where n is the address code number). a signal on the din pin then acti - vates the oscillator which in turn decodes the incoming address and data. the decoders check the received address twice continuously. if all the received address codes match the contents of the decoder s local address, the 12 n bits of data are decoded to activate the output pins and the vt pin is set high indicating a valid transmission. that will last until the address code is incorrect or no signal is received. the output of the vt pin is high only when the transmission is valid. otherwise it is always low. output type the data outputs follow the encoders during a valid transmission and are then latched in this state until the next valid transmission occurs. flowchart the oscillator is disabled in the standby state and activated as long as a logic high signal is applied to the din pin. i.e., the din pin should be kept low if there is no signal input. 0

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decoder timing encoder/decoder cross reference tables part no. data pins address pins vt pair encoder package encoder decoder dip sop dip sop ht6030 0 12 ht6010 18, 20 20 18 20 ht6032 2 10 ht6010 18, 20 20 18 20 ht6012 18 20 18 20 ht6034 4 8 ht6010 18, 20 20 18 20 ht6014 18 20 address/data sequence the following table describes the position of the address/data sequence for various models of the 3 12 se- ries of decoders. a correct device should be selected according to the requirements of individual address and data. part no. address/data bits 0 1 2 3 4 5 6 7 8 9 10 11 ht6030 a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 ht6032 a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 d10 d11 ht6034 a0 a1 a2 a3 a4 a5 a6 a7 d8 d9 d10 d11 3 12 series of decoders 7 december 13, 1999 "6 !' &4 &4 .

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oscillator frequency vs supply voltage the recommended oscillator frequency is f oscd (decoder)
33 f osce (encoder) 3 12 series of decoders 8 december 13, 1999 "' & ' ( ) * , +!%!!!"!& )"6 +!6 !,%6 "*%6 &+%6 ()%6 ,"%6 "- "%% !*( !(% !"( 9!%%6: ; application circuits note: typical infrared receiver: pic-12043t/pic-12043s (kodeshi corp.) or ltm9052 (liteon corp.) typical rf receiver: jr-200 (juwa corp.) re-99 (ming microsystem, u.s.a.) 3 12 series of decoders 9 december 13, 1999

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3 12 series of decoders 10 december 13, 1999 copyright 1999 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 modification, nor recommends the use of its products for application that may pres - ent a risk to human life due to malfunction or otherwise. holtek reserves the right to alter its products without prior notification. for the most up-to-date information, please visit our web site at http://www.holtek.com.tw. holtek semiconductor inc. (headquarters) no.3, creation rd. ii, science-based industrial park, hsinchu, taiwan, r.o.c. tel: 886-3-563-1999 fax: 886-3-563-1189 holtek semiconductor inc. (taipei office) 11f, no.576, sec.7 chung hsiao e. rd., taipei, taiwan, r.o.c. tel: 886-2-2782-9635 fax: 886-2-2782-9636 fax: 886-2-2782-7128 (international sales hotline) holtek semiconductor (hong kong) ltd. rm.711, tower 2, cheung sha wan plaza, 833 cheung sha wan rd., kowloon, hong kong tel: 852-2-745-8288 fax: 852-2-742-8657 holtek semiconductor (shanghai) ltd. 7th floor, building 2, no.889, yi shan rd., shanghai, china tel: 021-6485-5560 fax: 021-6485-0313 holmate technology corp. 48531 warm springs boulevard, suite 413, fremont, ca 94539 tel: 510-252-9880 fax: 510-252-9885

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