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HT12D Datasheet(PDF) 1 Page - Holtek Semiconductor Inc |
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HT12D Datasheet(HTML) 1 Page - Holtek Semiconductor Inc |
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1 / 9 page  212 Series of Decoders Selection Table Function Address No. Data VT Oscillator Trigger Package Part No. No. Type HT12D 8 4 L Ö RC oscillator DIN active ²Hi² 18 DIP/20 SOP HT12F 12 0 ¾Ö RC oscillator DIN active ²Hi² 18 DIP/20 SOP Notes: Data type: L stands for latch type data output. VT can be used as a momentary data output. 1 July 12, 1999 General Description The 2 12 decoders are a series of CMOS LSIs for remote control system applications. They are paired with Holtek¢s2 12 series of encoders (re- fer to the encoder/decoder cross reference ta- ble). 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 se- rial input data three times continuously with 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 12 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. Features · 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¢s2 12 series of encoders · 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 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 |
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Similar Description - HT12D |
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