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HT12M 2 12 decoder doorbell block diagram pin assignment rev. 1.10 1 july 14, 2003 features operating voltage: 2.4v~5.0v built-in amp 2-channel dual tone generator one pin oscillator current type d/a output tone optional: ding-dong/westminster s tunes pair with ht12e encoder 16-pin dip package general description the main application area for the HT12M device is for remote control doorbells working together with ht12e. containing all the functions of the holtek ht12d de - coder and with an added amplifier and tone generator, the device eliminates the need for customers to incorpo - rate an external op-amp and tone generator ic within their product applications, in the process significantly re - ducing overall product costs. in addition to being fully compatible with the ht12d cir - cuitry, the device includes the following features; inter - nal inverting amp with can also operate as standard independent inverter, internal 2 channel tone generator and current type audio output.

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pad assignment pad coordinates unit: m pad no. x y 1 610.00 701.90 2 622.00 461.60 3 622.00 350.60 4 622.00 239.70 5 616.00 695.20 6 502.00 695.20 7 388.50 687.70 8 87.95 647.80 9 575.80 172.40 10 575.80 444.20 11 308.30 660.40 12 22.10 635.90 13 -122.40 638.40 14 -270.40 701.90 15 384.50 701.90 16 495.50 701.90 chip size: 1530 1690 m * the ic substrate should be connected to vss in the pcb layout artwork. pin description pin no. pin name i/o internal connection description 1~8 a0~a7 i nmos open drain address pin 9 vss negative power supply, ground 10 aud o pmos open drain audio out 11 din i coms in serial data input 12 f.b o cmos amp feed back 13 osci i oscillator input pin 14 vt o cmos busy, data valid 15 test i cmos in test pin 16 vdd positive power supply absolute maximum ratings supply voltage ..........................v ss 0.3v to v ss +5.5v storage temperature ........................... 50 cto125 c input voltage .............................v ss 0 . 3v to v dd +0.3v operating temperature .......................... 25 cto70 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. HT12M rev. 1.10 2 july 14, 2003 , ! - . ! / $ ) ( ' & $ % % " + % "
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d.c. characteristics symbol parameter test conditions min. typ. max. unit v dd conditions v dd operating voltage 2.4 5v i stb standby current 5v osc stop amp off 0.1 1 a 5v osc stop amp on 10 20 a i dd operating current 5v no load f osc =150khz 1.5 2 ma i aud aud output current 5v transistor b load 3 5 ma i vt vt output source current 5v v oh =4.5v 2 3 ma vt output sink current 5v v ol =0.5v 23 ma v ih high input voltage 5v 3.5 5v v il low input voltage 5v 0 1v f osc oscillator frequency 5v r osc =820k 190 khz HT12M rev. 1.10 3 july 14, 2003 functional description built-in inverter amp trigger mode single tone has 4 second total length, dual tone has 1 second total length. . 0 . 1 2 1 2 3 4 5 $ . ( . ( ) . the ding-dong sound: is determined by the d8~d11 pins on the ht12e. while the re-trigger/non-trigger function is determined by the d11 pin on the ht12e. d11 d10 d9 d8 sound notes 1 000mi 1 2 0 0 1 mi do 2 3 010 mi do mi do repeat 4 0 1 1 mi/do single tone 5 100 mi do re sol sol re mi do westminster s tune 6 1 0 1 mi/do do/sol double tone 7 1 1 0 sol re mi do 4 8 111 mi/do do/sol mi/do do/sol dual tone-repeat note: section time: 0.8sec 2 = 1.6sec
application circuit ht12e/HT12M pairing application circuit using internal op amplifier circuit HT12M rev. 1.10 4 july 14, 2003 . 0 . 6 + ! $ ) ( ' & % " $ ) ( ' & % " + #
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using external op amplifier circuit typical rf-receiver circuit HT12M rev. 1.10 5 july 14, 2003 " ( $ + $ & % + ) ! ) ) ! ) ( * ) ! ) 0 1
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package information 16-pin dip (300mil) outline dimensions symbol dimensions in mil min. nom. max. a 745 775 b 240 260 c 125 135 d 125 145 e16 20 f50 70 g 100 h 295 315 i 335 375
0 15 HT12M rev. 1.10 6 july 14, 2003 . . $ % $ * + # 8
HT12M rev. 1.10 7 july 14, 2003 copyright 2003 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) 7th floor, building 2, no.889, yi shan rd., shanghai, china 200233 tel: 021-6485-5560 fax: 021-6485-0313 http://www.holtek.com.cn holtek semiconductor inc. (shenzhen sales office) 5/f, unit a, productivity building, cross of science m 3rd road and gaoxin m 2nd road, science park, nanshan district, shenzhen, china 518057 tel: 0755-8616-9908, 8616-9308 fax: 0755-8616-9533 holtek semiconductor inc. (beijing sales office) suite 1721, jinyu tower, a129 west xuan wu men street, xicheng district, beijing, china 100031 tel: 010-6641-0030, 6641-7751, 6641-7752 fax: 010-6641-0125 holtek semiconductor inc. (chengdu sales office) 709, building 3, champagne plaza, no.97 dongda street, chengdu, sichuan, china 610016 tel: 028-6653-6590 fax: 028-6653-6591 holmate semiconductor, inc. (north america sales office) 46729 fremont blvd., fremont, ca 94538 tel: 510-252-9880 fax: 510-252-9885 http://www.holmate.com

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