HT-12F Holtek, HT-12F Datasheet

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HT-12F

Manufacturer Part Number
HT-12F
Description
2 12 Series of Decoders
Manufacturer
Holtek
Datasheet
Features
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Applications
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General Description
The 2
remote control system applications. They are
paired with Holtek¢s 2
fer to the encoder/decoder cross reference ta-
bl e) . For pr oper operati on, a pa i r 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
are transmitted by a carrier using an RF or an
IR transmission medium. They compare the se-
rial input data three times continuously with
Selection Table
Notes: Data type: L stands for latch type data output.
Part No.
HT12D
HT12F
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¢s 2
Binary address setting
Received codes are checked 3 times
Burglar alarm system
Smoke and fire alarm system
Garage door controllers
Car door controllers
12
VT can be used as a momentary data output.
Function Address
decoders are a series of CMOS LSIs for
12
No.
12
12
8
12
series of encoders that
series of encoders (re-
series of encoders
No.
4
0
Data
Type
¾
L
VT
Ö
Ö
2
1
12
RC oscillator DIN active ²Hi² 18 DIP/20 SOP
RC oscillator DIN active ²Hi² 18 DIP/20 SOP
Oscillator
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their local addresses. If no error or unmatched
codes are found, 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 2
ing informations that consist of N bits of ad-
dress and 12-N bits of data. Of this series, the
HT12D is arranged to provide 8 address bits
and 4 data bits, and HT12F is used to decode 12
bits of address information.
Series of Decoders
Address/Data number combination
Built-in oscillator needs only 5% resistor
Valid transmission indicator
Easy interface with an RF or an infrared
transmission medium
Minimal external components
Car alarm system
Security system
Cordless telephones
Other remote control systems
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HT12D: 8 address bits and 4 data bits
HT12F: 12 address bits only
12
series of decoders are capable of decod-
Trigger
Package
July 12, 1999

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HT-12F Summary of contents

Page 1

... The 2 series of decoders are capable of decod- ing informations that consist of N bits of ad- dress and 12-N bits of data. Of this series, the HT12D is arranged to provide 8 address bits and 4 data bits, and HT12F is used to decode 12 bits of address information. VT Oscillator Trigger L Ö RC oscillator DIN active ²Hi² 18 DIP/20 SOP ¾ ...

Page 2

Block Diagram Note: The address/data pins are available in various combinations (see the address/data table). Pin Assignment 12 2 Series of Decoders 2 July 12, 1999 ...

Page 3

Pin Description Internal Pin Name I/O Connection NMOS A0~A11 I TRANSMISSION GATE D8~D11 O CMOS OUT DIN I CMOS CMOS OUT OSC1 I OSCILLATOR OSC2 O OSCILLATOR VSS I ¾ VDD I ¾ Approximate internal connection circuits ...

Page 4

Electrical Characteristics Symbol Parameter V Operating Voltage DD I Standby Current STB I Operating Current DD Data Output Source Current (D8~D11 Data Output Sink Current (D8~D11) VT Output Source Current Output Sink Current V ²H² ...

Page 5

... Otherwise it is always low. Output type 12 Of the 2 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 ...

Page 6

... Part No HT12D HT12F Series of Decoders Package VT Pair Encoder Encoder DIP SOP HT12A 18 20 Ö HT12E 18 20 HT12A 18 20 Ö HT12E series of decoders. A Address/Data Bits ...

Page 7

... Oscillator frequency vs supply voltage The recommended oscillator frequency Series of Decoders (decoder (HT12E encoder) OSCD OSCE (HT12A encoder). OSCE July 12, 1999 ...

Page 8

Application Circuits Notes: Typical infrared receiver: PIC-12043T/PIC-12043S (KODESHI CORP.) Typical RF receiver: JR-200 (JUWA CORP.) RE-99 (MING MICROSYSTEM, U.S.A Series of Decoders or LTM9052 (LITEON CORP.) 8 July 12, 1999 ...

Page 9

... 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. ...

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