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ht12d/HT12F 2 12 series of decoders selection table function address no. data vt oscillator trigger package part no. no. type ht12d 8 4 l rc oscillator din active hi 18dip, 20sop HT12F 12 0 rc oscillator din active hi 18dip, 20sop notes: data type: l stands for latch type data output. vt can be used as a momentary data output. rev. 1.20 1 february 20, 2009 general description the 2 12 decoders are a series of cmos lsis for remote control system applications. they are paired with holteks2 12 series of encoders (refer to the encoder/de- coder cross reference table). for proper operation, a pair of encoder/decoder with the same number of ad- dresses and data format should be chosen. the decoders receive serial addresses and data from a programmed 2 12 series of encoders that are transmitted by a carrier using an rf or an ir transmission medium. they compare the serial input data three times continu - ously with their local addresses. if no error or un- matched codes are found, the input data codes are decoded and then transferred to the output pins. the vt pin also goes high to indicate a valid transmission. the 2 12 series of decoders are capable of decoding informations that consist of n bits of address and 12 n bits of data. of this series, the ht12d is arranged to pro- vide 8 address bits and 4 data bits, and HT12F is used to decode 12 bits of address information. features operating voltage: 2.4v~12v low power and high noise immunity cmos technology low standby current capable of decoding 12 bits of information binary address setting received codes are checked 3 times address/data number combination ht12d: 8 address bits and 4 data bits HT12F: 12 address bits only built-in oscillator needs only 5% resistor valid transmission indicator easy interface with an rf or an infrared transmission medium minimal external components pair with holtek s2 12 series of encoders 18-pin dip, 20-pin sop package 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
block diagram note: the address/data pins are available in various combinations (see the address/data table). pin assignment pin description pin name i/o internal connection description a0~a11 (HT12F) i nmos transmission gate input pins for address a0~a11 setting these pins can be externally set to vss or left open. a0~a7 (ht12d) input pins for address a0~a7 setting these pins can be externally set to vss or left open. d8~d11 (ht12d) o cmos out output data pins, power-on state is low. 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 ht12d/HT12F rev. 1.20 2 february 20, 2009
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approximate internal connection circuits 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 maximum 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 exposure to extreme conditions may affect device reliabil - ity. 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 =150khz 200 400 a i o data output source current (d8~d11) 5v v oh =4.5v 1 1.6 ma data output sink current (d8~d11) 5v v ol =0.5v 1 1.6 ma i vt vt output source current 5v v oh =4.5v 1 1.6 ma vt output sink current v ol =0.5v 1 1.6 ma v ih h input voltage 5v 3.5 5v v il l input voltage 5v 0 1v f osc oscillator frequency 5v r osc =51k
150 khz ht12d/HT12F rev. 1.20 3 february 20, 2009 # . ! / # . " # . 0
decoder timing ht12d/HT12F rev. 1.20 4 february 20, 2009 functional description operation the 2 12 series of decoders provides various combina - tions of addresses and data pins in different packages so as to pair with the 2 12 series of encoders. the decoders receive data that are transmitted by an encoder and interpret the first n bits of 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 activates the oscillator which in turn decodes the incoming ad - dress and data. the decoders will then check the re - ceived address three times continuously. if the received address codes all match the contents of the decoder s local address, the 12 n bits of data are decoded to acti - vate the output pins and the vt pin is set high to indicate a valid transmission. this will last unless the address code is incorrect or no signal is received. the output of the vt pin is high only when the transmis - sion is valid. otherwise it is always low. output type of the 2 12 series of decoders, the HT12F has no data output pin but its vt pin can be used as a momentary data output. the ht12d, on the other hand, provides 4 latch type data pins whose data remain unchanged until new data are received. part no. data pins address pins output type operating voltage ht12d 4 8 latch 2.4v~12v HT12F 0 12 2.4v~12v flowchart the oscillator is disabled in the standby state and acti - vated when a logic high signal applies to the din pin. that is to say, the din should be kept low if there is no signal input. 1 2 # 1 # # # 1 3 3 $ 4 5 1 # 1 % 2 4 $ % 3 2 . 2 6 5 ' 7 2 ! 7 ( 7 ( 5 ( 5 / 0 8 5 / / 3 7 $ ! 7 (
encoder/decoder cross reference table decoders part no. data pins address pins vt pair encoder package encoder decoder dip sop dip sop ht12d 4 8 ht12a ht12e 18 20 18 20 HT12F 0 12 ht12a ht12e 18 20 18 20 address/data sequence the following table provides address/data sequence for various models of the 2 12 series of decoders. part no. address/data bits 0 123456 7891011 ht12d a0 a1 a2 a3 a4 a5 a6 a7 d8 d9 d10 d11 HT12F a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 oscillator frequency vs supply voltage note: the recommended oscillator frequency is f oscd (decoder) 50 f osce (ht12e encoder) 1 3 f osce (ht12a encoder). ht12d/HT12F rev. 1.20 5 february 20, 2009 & ) & 9 & & 7 : ; < & & ) & ! & & ! ) & ' ) & ( & & ' & & & ! ) ! ' ( ) * + - , & ! '

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application circuits ht12d/HT12F rev. 1.20 6 february 20, 2009

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package information 18-pin dip (300mil) outline dimensions ms-001d (see fig1) symbol dimensions in mil min. nom. max. a 880 920 b 240 280 c 115 195 d 115 150 e1 4 22 f4 5 70 g 100 h 300 325 i 430 ms-001d (see fig2) symbol dimensions in mil min. nom. max. a 845 880 b 240 280 c 115 195 d 115 150 e1 4 22 f4 5 70 g 100 h 300 325 i 430 ht12d/HT12F rev. 1.20 7 february 20, 2009
fig1. full lead packages
fig2. 1 / 2 lead packages
mo-095a (see fig2) symbol dimensions in mil min. nom. max. a 845 885 b 275 295 c 120 150 d 110 150 e1 4 22 f4 5 60 g 100 h 300 325 i 430 ht12d/HT12F rev. 1.20 8 february 20, 2009
20-pin sop (300mil) outline dimensions ms-013 symbol dimensions in mil min. nom. max. a 393 419 b 256 300 c1 2 20 c 496 512 d 104 e 50 f4 12 g1 6 50 h8 13 08 ht12d/HT12F rev. 1.20 9 february 20, 2009 ! & & % / = > :
product tape and reel specifications reel dimensions sop 20w symbol description dimensions in mm a reel outer diameter 330.0 1.0 b reel inner diameter 100.0 1.5 c spindle hole diameter 13.0 +0.5/-0.2 d key slit width 2.0 0.5 t1 space between flange 24.8 +0.3/-0.2 t2 reel thickness 30.2 0.2 ht12d/HT12F rev. 1.20 10 february 20, 2009 % !
carrier tape dimensions sop 20w symbol description dimensions in mm w carrier tape width 24.0 +0.3/-0.1 p cavity pitch 12.0 0.1 e perforation position 1.75 0.10 f cavity to perforation (width direction) 11.5 0.1 d perforation diameter 1.5 +0.1/-0.0 d1 cavity hole diameter 1.50 +0.25/-0.00 p0 perforation pitch 4.0 0.1 p1 cavity to perforation (length direction) 2.0 0.1 a0 cavity length 10.8 0.1 b0 cavity width 13.3 0.1 k0 cavity depth 3.2 0.1 t carrier tape thickness 0.30 0.05 c cover tape width 21.3 0.1 ht12d/HT12F rev. 1.20 11 february 20, 2009 6 ? 6 6 & / = @ & & % & " 7
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ht12d/HT12F rev. 1.20 12 february 20, 2009 copyright 2009 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publication. however, holtek as - sumes 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 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 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 park, hsinchu, taiwan tel: 886-3-563-1999 fax: 886-3-563-1189 http://www.holtek.com.tw holtek semiconductor inc. (taipei sales office) 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. (shanghai sales office) g room, 3 floor, no.1 building, no.2016 yi-shan road, minhang district, shanghai, china 201103 tel: 86-21-5422-4590 fax: 86-21-5422-4705 http://www.holtek.com.cn holtek semiconductor inc. (shenzhen sales office) 5f, unit a, productivity building, gaoxin m 2nd, middle zone of high-tech industrial park, shenzhen, china 518057 tel: 86-755-8616-9908, 86-755-8616-9308 fax: 86-755-8616-9722 holtek semiconductor inc. (beijing sales office) suite 1721, jinyu tower, a129 west xuan wu men street, xicheng district, beijing, china 100031 tel: 86-10-6641-0030, 86-10-6641-7751, 86-10-6641-7752 fax: 86-10-6641-0125 holtek semiconductor inc. (chengdu sales office) 709, building 3, champagne plaza, no.97 dongda street, chengdu, sichuan, china 610016 tel: 86-28-6653-6590 fax: 86-28-6653-6591 holtek semiconductor (usa), inc. (north america sales office) 46729 fremont blvd., fremont, ca 94538, usa tel: 1-510-252-9880 fax: 1-510-252-9885 http://www.holtek.com

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