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3 18 series of decoders selection table function address no. data vt oscillator trigger package item no. type ht602l 12 2 l ? rc oscillator din active hi 20 dip/20 sop ht604l 10 4 l ? rc oscillator din active hi 20 dip/20 sop ht605l 9 5 l ? rc oscillator din active hi 20 dip/20 sop ht611 14 0 ? rc oscillator din active hi 20 dip/20 sop features operating voltage: 2.4v~12v low power and high noise immunity cmos technology low standby current capable of decoding 18 bits of information pairs with holteks 3 18 series of encoders 8~18 address pins 0~8 data pins trinary address setting two times of receiving check built-in oscillator needs only a 5% resistor valid transmission indictor easily interface with an rf or an infrared transmission medium minimal external components general description the 3 18 decoders are a series of cmos lsis for remote control system applications. they are paired with the 3 18 series of encoders. for proper operation a pair of encoder/decoder pair with the same number of address and data format should be selected (refer to the en- coder/decoder cross reference tables). the 3 18 series of decoders receives serial ad- dress and data from that series of encoders that are transmitted by a carrier using an rf or an ir transmission medium. it then compares the serial input data twice continuously with its local address. if no errors or unmatched codes are encountered, the input data codes are de- coded and then transferred to the output pins. the vt pin also goes high to indicate a valid transmission. the 3 18 decoders are capable of decoding 18 bits of information that consists of n bits of address and 18Cn bits of data. to meet various applica- tions they are arranged to provide a number of data pins whose range is from 0 to 8 and an address pin whose range is from 8 to 18. in addition, the 3 18 decoders provide various com- binations of address/data number in different packages. 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 1 2nd oct 97
function address no. data vt oscillator trigger package item no. type ht612 12 2 m ? rc oscillator din active hi 20 dip/20 sop ht614 10 4 m ? rc oscillator din active hi 20 dip/20 sop ht615 9 5 m ? rc oscillator din active hi 20 dip/20 sop ht644l 14 4 l ? rc oscillator din active hi 24 sop/24 sdip ht646l 12 6 l ? rc oscillator din active hi 24 sop/24 sdip ht648l 10 8 l ? rc oscillator din active hi 24 sop/24 sdip ht651 18 0 ? rc oscillator din active hi 24 sop/24 sdip ht654 14 4 m ? rc oscillator din active hi 24 sop/24 sdip ht656 12 6 m ? rc oscillator din active hi 24 sop/24 sdip ht658 10 8 m ? rc oscillator din active hi 24 sop/24 sdip ht682l 10 2 l ? rc oscillator din active hi 18 dip ht683l 9 3 l ? rc oscillator din active hi 18 dip ht684l 8 4 l ? rc oscillator din active hi 18 dip ht691 12 0 ? rc oscillator din active hi 18 dip HT692 10 2 m ? rc oscillator din active hi 18 dip ht693 9 3 m ? rc oscillator din active hi 18 dip ht694 8 4 m ? rc oscillator din active hi 18 dip note: data type: m represents momentary type of data output. l represents latch type of data output. vt can be used as a momentary data output. 3 18 series of decoders 2 2nd oct 97
block diagram note: the address/data pins are available in various combinations (refer to the address/data table). pin description pin name i/o internal connection description a0~a17 i transmission gate input pins for address a0~a17 setting they can be externally set to vdd, vss, or left open. d10~d17 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 i negative power supply (gnd) vdd i positive power supply 3 18 series of decoders 3 2nd oct 97
approximate internal connection circuits absolute maximum ratings* supply voltage ............................... C0.3v to 13v storage temperature................. C50 c to 125 c input voltage..................v ss C0.3v to v dd +0.3v operating temperature............... C20 c to 75 c *note: stresses above those listed under absolute maximum ratings may cause permanent damage to the 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 and exposure to absolute maximum rating conditions for extened periods may affect device reliability. electrical characteristics (ta=25 c) symbol parameter test conditions min. typ. max. unit v dd conditions v dd operating voltage 3 12 v i stb standby current 5v oscillator stops 0.1 1 m a 12v 2 4 m a i dd operating current 5v no load f osc =100khz 0.2 1 ma i o data output source current (d10~d17) 5v v oh =4.5v C0.5 C1 ma data output sink current (d10~d17) v ol =0.5v 0.5 1 ma i vt vt output source current 5v v oh =4.5v C2 C4 ma vt output sink current v ol =0.5v 1 2 ma v ih h input voltage 5v 3.5 5 v v il l input voltage 5v 0 1 v f osc oscillator frequency 10v r osc =330k w 100khz 3 18 series of decoders 4 2nd oct 97
functional description operation the 3 18 series of decoders provides various com- binations of address and data pins in different packages. it is paired with the 3 18 series of encoders. the decoders receive data transmit- ted by the encoders and interpret the first n bits of the code period as address and the last 18Cn bits as data (where n is the address code number). a signal on the din pin then activates the oscillator which in turns decodes the incom- ing address and data. the decoders will check the received address twice continuously. if all the received address codes match the contents of the decoders local address, the 18Cn bits of data are decoded to activate the output pins, and the vt pin is set high to indicate a valid transmission. that will last until the address code is incorrect or no signal has been received. the output of the vt pin is high only when the transmission is valid. otherwise it is low al- ways. output type there are 2 types of output to select from: momentary type the data outputs follow the encoder during a valid transmission and then reset. latch type the data outputs follow the encoder during a valid transmission, and are then latched in this state until the next valid transmission occurs. flowchart note: 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 should be kept low if there is no signal input. 3 18 series of decoders 5 2nd oct 97
decoder timing encoder/decoder selection tables latch type of data output part no. data pins address pins vt pair encoder package encoder decoder dip sop sdip dip sop sdip ht682l 2 10 ? ht680 18 18 ht683l 3 9 ? ht680 18 18 ht6187 18 ht684l 4 8 ? ht680 18 18 ht602l 2 12 ? ht600 20 20 20 20 ht604l 4 10 ? ht600 20 20 2020 ht6207 20 ht605l 5 9 ? ht600 20 20 20 20 ht644l 4 14 ? ht640 24 24 24 24 24 ht646l 6 12 ? ht640 24 24 24 24 24 ht6247 24 ht648l 8 10 ? ht640 24 24 24 24 24 3 18 series of decoders 6 2nd oct 97
momentary type of data output part no. data pins address pins vt pair encoder package encoder decoder dip sop sdip dip sop sdip ht691 0 12 ? ht680 1818 HT692 2 10 ? ht680 1818 ht693 3 9 ? ht680 18 18 ht6187 18 ht694 4 8 ? ht680 1818 ht611 0 14 ? ht600 20 20 20 20 ht612 2 12 ? ht600 20 20 20 20 ht614 4 10 ? ht600 20 20 2020 ht6207 20 ht615 5 9 ? ht600 20 20 20 20 ht651 0 18 ? ht640 2424242424 ht654 4 14 ? ht640 2424242424 ht656 6 12 ? ht640 24 24 24 24 24 ht6247 24 ht658 8 10 ? ht640 2424242424 3 18 series of decoders 7 2nd oct 97
address/data sequence the following provides a table of address/data sequence for various models of the 3 18 series decoders. a correct device should be selected according to the requirements of individual address and data. part no. address/data bits 0~3 4 5 6~9 10 11 12 13 14 15 16 17 ht602l a0~a3 a4 a6~a9 a11 a12 a13 d14 d15 ht604l a0~a3 a4 a6~a9 a11 d12 d13 d14 d15 ht605l a0~a3 a4 a6~a9 d11 d12 d13 d14 d15 ht611 a0~a3 a4 a6~a9 a11 a12 a13 a14 a15 ht612 a0~a3 a4 a6~a9 a11 a12 a13 d14 d15 ht614 a0~a3 a4 a6~a9 a11 d12 d13 d14 d15 ht615 a0~a3 a4 a6~a9 d11 d12 d13 d14 d15 ht644l a0~a3 a4 a5 a6~a9 a10 a11 a12 a13 d14 d15 d16 d17 ht646l a0~a3 a4 a5 a6~a9 a10 a11 d12 d13 d14 d15 d16 d17 ht648l a0~a3 a4 a5 a6~a9 d10 d11 d12 d13 d14 d15 d16 d17 ht651 a0~a3 a4 a5 a6~a9 a10 a11 a12 a13 a14 a15 a16 a17 ht654 a0~a3 a4 a5 a6~a9 a10 a11 a12 a13 d14 d15 d16 d17 ht656 a0~a3 a4 a5 a6~a9 a10 a11 d12 d13 d14 d15 d16 d17 ht658 a0~a3 a4 a5 a6~a9 d10 d11 d12 d13 d14 d15 d16 d17 ht682l a0~a3 a6~a9 a11 a12 d14 d15 ht683l a0~a3 a6~a9 a11 d12 d14 d15 ht684l a0~a3 a6~a9 d11 d12 d14 d15 ht691 a0~a3 a6~a9 a11 a12 a14 a15 HT692 a0~a3 a6~a9 a11 a12 d14 d15 ht693 a0~a3 a6~a9 a11 d12 d14 d15 ht694 a0~a3 a6~a9 d11 d12 d14 d15 note: is a dummy code which is left open and not bonded out. 3 18 series of decoders 8 2nd oct 97
oscillator frequency vs supply voltage the recommended oscillator frequency is f oscd (decoder) @ f osce (encoder). 3 18 series of decoders 9 2nd oct 97
package information latch series 3 18 series of decoders 10 2nd oct 97
momentary series 3 18 series of decoders 11 2nd oct 97
momentary series 3 18 series of decoders 12 2nd oct 97
application circuits 3 18 series of decoders 13 2nd oct 97
note: typical infrared receiver: pic-12043t/pic-12043c (kodenshi corp.) or ltm9052 (liteon corp.) typical rf receiver: jr-200 (juwa corp.) re-99 (ming microsystem, u.s.a.) 3 18 series of decoders 14 2nd oct 97

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