Datasheet HT12D, HT12F (Holtek)
| Manufacturer | Holtek |
| Description | 212 Series of Decoders |
| Pages / Page | 12 / 1 — HT12D/HT12F. 212 Series of Decoders. Features. Applications. General … |
| File Format / Size | PDF / 115 Kb |
| Document Language | English |
HT12D/HT12F. 212 Series of Decoders. Features. Applications. General Description. Selection Table. Function. Address. Data. Oscillator
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Text Version of Document
HT12D/HT12F 212 Series of Decoders Features
· Operating voltage: 2.4V~12V · Built-in oscillator needs only 5% resistor · Low power and high noise immunity CMOS · Valid transmission indicator technology · Easy interface with an RF or an infrared transmission · Low standby current medium · Capable of decoding 12 bits of information · Minimal external components · Binary address setting · Pair with Holtek¢s 212 series of encoders · Received codes are checked 3 times · 18-pin DIP, 20-pin SOP package · Address/Data number combination - HT12D: 8 address bits and 4 data bits - HT12F: 12 address bits only
Applications
· Burglar alarm system · Car alarm system · Smoke and fire alarm system · Security system · Garage door controllers · Cordless telephones · Car door controllers · Other remote control systems
General Description
The 212 decoders are a series of CMOS LSIs for remote ously with their local addresses. If no error or un- control system applications. They are paired with matched codes are found, the input data codes are Holtek¢s 212 series of encoders (refer to the encoder/de- decoded and then transferred to the output pins. The VT coder cross reference table). For proper operation, a pin also goes high to indicate a valid transmission. pair of encoder/decoder with the same number of ad- The 212 series of decoders are capable of decoding dresses and data format should be chosen. informations that consist of N bits of address and 12-N The decoders receive serial addresses and data from a bits of data. Of this series, the HT12D is arranged to pro- programmed 212 series of encoders that are transmitted vide 8 address bits and 4 data bits, and HT12F is used to by a carrier using an RF or an IR transmission medium. decode 12 bits of address information. They compare the serial input data three times continu-
Selection Table Function Address Data VT Oscillator Trigger Package No. Part No. No. Type
HT12D 8 4 L Ö RC oscillator DIN active ²Hi² 18DIP, 20SOP HT12F 12 0 ¾ Ö RC oscillator DIN active ²Hi² 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 Document Outline Features Applications General Description Selection Table Block Diagram Pin Assignment Pin Description Absolute Maximum Ratings Electrical Characteristics Functional Description Application Circuits Package Information Product Tape and Reel Specifications
· Operating voltage: 2.4V~12V · Built-in oscillator needs only 5% resistor · Low power and high noise immunity CMOS · Valid transmission indicator technology · Easy interface with an RF or an infrared transmission · Low standby current medium · Capable of decoding 12 bits of information · Minimal external components · Binary address setting · Pair with Holtek¢s 212 series of encoders · Received codes are checked 3 times · 18-pin DIP, 20-pin SOP package · Address/Data number combination - HT12D: 8 address bits and 4 data bits - HT12F: 12 address bits only
Applications
· Burglar alarm system · Car alarm system · Smoke and fire alarm system · Security system · Garage door controllers · Cordless telephones · Car door controllers · Other remote control systems
General Description
The 212 decoders are a series of CMOS LSIs for remote ously with their local addresses. If no error or un- control system applications. They are paired with matched codes are found, the input data codes are Holtek¢s 212 series of encoders (refer to the encoder/de- decoded and then transferred to the output pins. The VT coder cross reference table). For proper operation, a pin also goes high to indicate a valid transmission. pair of encoder/decoder with the same number of ad- The 212 series of decoders are capable of decoding dresses and data format should be chosen. informations that consist of N bits of address and 12-N The decoders receive serial addresses and data from a bits of data. Of this series, the HT12D is arranged to pro- programmed 212 series of encoders that are transmitted vide 8 address bits and 4 data bits, and HT12F is used to by a carrier using an RF or an IR transmission medium. decode 12 bits of address information. They compare the serial input data three times continu-
Selection Table Function Address Data VT Oscillator Trigger Package No. Part No. No. Type
HT12D 8 4 L Ö RC oscillator DIN active ²Hi² 18DIP, 20SOP HT12F 12 0 ¾ Ö RC oscillator DIN active ²Hi² 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 Document Outline Features Applications General Description Selection Table Block Diagram Pin Assignment Pin Description Absolute Maximum Ratings Electrical Characteristics Functional Description Application Circuits Package Information Product Tape and Reel Specifications
