HT12A HT12E
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HT12A/HT12E Series Encoders
Operating voltage 2.4V~5V HT12A 2.4V~12V HT12E power high noise immunity CMOS Minimum transmission word Four words HT12E word HT12A Built-in oscillator needs only resistor Data code positive polarity Minimal external components Pair with series decoders 18-pin DIP, 20-pin package
standby current: 0.1mA (typ.) VDD=5V HT12A with 38kHz carrier infrared transmission
medium
Applications
Burglar alarm system Smoke fire alarm system Garage door controllers door controllers alarm system Security system Cordless telephones Other remote control systems
General Description
encoders series CMOS LSIs remote control system applications. They capable encoding information which consists address bits 12-N data bits. Each address/data input logic states. programmed addresses/data transmitted together with header
bits infrared transmission medium upon receipt trigger signal. capability select trigger HT12E DATA trigger HT12A further enhances application flexibility series encoders. HT12A additionally provides 38kHz carrier infrared systems.
Selection Table
Function Address Address/ Data Oscillator Trigger Data Part HT12A HT12E Note: 455kHz D8~D11 resonator oscillator Carrier Output 38kHz Negative Polarity Package
18DIP, 20SOP 18DIP, 20SOP
Address/Data represents pins that either address data according application requirement.
Rev. 1.20
February 2009
HT12A/HT12E
Block Diagram
Trigger HT12E
illa
DATA Trigger HT12A
illa
Note:
address data pins available various combinations (refer address/data table).
Assignment
Rev. 1.20
February 2009
HT12A/HT12E
Description
Name A0~A7 Internal Connection CMOS Pull-high (HT12A) Description Input pins address A0~A7 setting These pins externally left open
NMOS TRANSMISSION GATE PROTECTION DIODE (HT12E) AD8~AD11 NMOS TRANSMISSION Input pins address/data AD8~AD11 setting GATE PROTECTION These pins externally left open DIODE (HT12E) CMOS Pull-high CMOS CMOS Pull-high CMOS Pull-high OSCILLATOR OSCILLATOR OSCILLATOR OSCILLATOR Input pins data D8~D11 setting transmission enable, active These pins should externally left open (see Note) Encoder data serial transmission output Latch/Momentary transmission format selection pin: Latch: Floating Momentary: Transmission enable, active (see Note) Oscillator input Oscillator output 455kHz resonator oscillator input 455kHz resonator oscillator output Negative power supply, ground Positive power supply
D8~D11 DOUT OSC1 OSC2 Note:
D8~D11 data input transmission enable pins HT12A. transmission enable HT12E.
Approximate Internal Connections
Rev. 1.20
February 2009
HT12A/HT12E
Absolute Maximum Ratings
Supply Voltage (HT12A) .VSS-0.3V VSS+5.5V Input Voltage .VSS-0.3 VDD+0.3V Operating Temperature .-20°C 75°C Note: These stress ratings only. Stresses exceeding range specified under Maximum cause substantial damage device. Functional operation this device other conditions beyond those listed specification implied prolonged exposure extreme conditions affect device reliability. Supply Voltage (HT12E) .-0.3V Storage Temperature .-50°C 125°C
Electrical Characteristics
HT12A Symbol ISTB Parameter Operating Voltage Standby Current Operating Current IDOUT RDATA Output Drive Current Input Voltage Input Voltage D8~D11 Pull-high Resistance VDATA=0V load fOSC=455kHz VOH=0.9VDD (Source) VOL=0.1VDD (Sink) Test Conditions Oscillator stops Conditions Min. 0.8VDD Typ. -1.6 Max. 0.2VDD Ta=25°C Unit
HT12E Symbol ISTB Parameter Operating Voltage Standby Current Operating Current IDOUT fOSC Output Drive Current Input Voltage Input Voltage Oscillator Frequency Pull-high Resistance VOH=0.9VDD (Source) VOL=0.1VDD (Sink) ROSC=1.1MW VTE=0V load, fOSC=3kHz Test Conditions Oscillator stops Conditions Min. 0.8VDD Typ. -1.6 Max. 0.2VDD
Ta=25°C Unit
Rev. 1.20
February 2009
HT12A/HT12E
Functional Description
Operation series encoders begin 4-word transmission cycle upon receipt transmission enable HT12E D8~D11 HT12A, active low). This cycle will repeat itself long transmission enable D8~D11) held low. Once transmission enable returns high encoder output completes final cycle then stops shown below.
itte
Transmission timing HT12E
itte
Transmission timing HT12A (L/M=Floating VDD)
itte
Transmission timing HT12A (L/M=VSS)
Information Word L/M=1 device latch mode (for with latch type data decoders). When transmission enable removed during transmission, DOUT outputs complete word then stops. other hand, L/M=0 device momentary mode (for with momentary type data decoders). When transmission enable removed during transmission, DOUT outputs complete word then adds words with data code. information word consists periods illustrated below.
Composition information
Rev. 1.20
February 2009
HT12A/HT12E
Address/Data Waveform Each programmable address/data externally following logic states shown below.
Address/Data waveform HT12E
Address/Data waveform HT12A address/data bits HT12A transmitted with 38kHz carrier infrared remote controller flexibility. Address/Data Programming (Preset) status each address/data individually pre-set logic transmission-enable signal applied, encoder scans transmits status bits address/data serially order AD11 HT12E encoder HT12A encoder. During information transmission these bits transmitted with preceding synchronization bit. trigger signal applied, chip enters standby mode consumes reduced current less than supply voltage Usual applications preset address pins with individual security codes using switches wiring, while data selected push buttons electronic switches. following figure shows application using HT12E:
Rev. 1.20
February 2009
HT12A/HT12E
transmitted information shown: Pilot Sync. AD10 AD11
Address/Data Sequence following provides address/data sequence table various models series encoders. Address/Data Bits Part HT12A HT12E AD10 AD11
Transmission Enable HT12E encoders, transmission enabled applying signal pin. HT12A encoders, transmission enabled applying signal data pins D8~D11. Erroneous HT12E Application Circuits HT12E must follow closely application circuits provided Holtek (see
Error: AD8~AD11 pins input voltage VDD+0.3V
Error: power source activated pins AD8~AD11
Rev. 1.20
February 2009
HT12A/HT12E
Flowchart
HT12A
HT12E
itte
till
till
itte
Note:
D8~D11 transmission enables HT12A. transmission enable HT12E.
Rev. 1.20
February 2009
HT12A/HT12E
Oscillator Frequency Supply Voltage
recommended oscillator frequency fOSCD (decoder) fOSCE (HT12E encoder) fOSCE (HT12A encoder)
Application Circuits
itte
Rev. 1.20
February 2009
HT12A/HT12E
Package Information
18-pin (300mil) Outline Dimensions
Fig1. Full Lead Packages
Fig2. Lead Packages
MS-001d (see fig1)
Symbol
MS-001d (see fig2)
Dimensions Min. Nom. Max.
Symbol
Dimensions Min. Nom. Max.
Rev. 1.20
February 2009
HT12A/HT12E
MO-095a (see fig2)
Symbol
Dimensions Min. Nom. Max.
Rev. 1.20
February 2009
HT12A/HT12E
20-pin (300mil) Outline Dimensions
MS-013
Symbol
Dimensions Min. Nom. Max.
Rev. 1.20
February 2009
HT12A/HT12E
Product Tape Reel Specifications
Reel Dimensions
Symbol Description Reel Outer Diameter Reel Inner Diameter Spindle Hole Diameter Slit Width Space Between Flange Reel Thickness Dimensions 330.0±1.0 100.0±1.5 13.0+0.5/-0.2 2.0±0.5 24.8+0.3/-0.2 30.2±0.2
Rev. 1.20
February 2009
HT12A/HT12E
Carrier Tape Dimensions
Symbol Description Carrier Tape Width Cavity Pitch Perforation Position Cavity Perforation (Width Direction) Perforation Diameter Cavity Hole Diameter Perforation Pitch Cavity Perforation (Length Direction) Cavity Length Cavity Width Cavity Depth Carrier Tape Thickness Cover Tape Width Dimensions 24.0+0.3/-0.1 12.0±0.1 1.75±0.10 11.5±0.1 1.5+0.1/-0.0 1.50+0.25/-0.00 4.0±0.1 2.0±0.1 10.8±0.1 13.3±0.1 3.2±0.1 0.30±0.05 21.3±0.1
Rev. 1.20
February 2009
HT12A/HT12E
Holtek Semiconductor Inc. (Headquarters) No.3, Creation 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, 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) Room, 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) Unit Productivity Building, Gaoxin 2nd, Middle Zone 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 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 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, 94538, Tel: 1-510-252-9880 Fax: 1-510-252-9885 http://www.holtek.com
Copyright 2009 HOLTEK SEMICONDUCTOR INC. information appearing this Data Sheet believed accurate time publication. However, Holtek assumes responsibility arising from specifications described. applications mentioned herein used solely purpose illustration Holtek makes warranty representation that such applications will suitable without further modification, recommends products application that present risk human life malfunction otherwise. products authorized critical components life support devices systems. Holtek reserves right alter products without prior notification. most up-to-date information, please visit site http://www.holtek.com.tw.
Rev. 1.20
February 2009
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