HT12D HT12F -- 2¹² SeriesofDecoders

General Description

The 2¹² decoders are a seriesofCMOS LSIs for remote control system applications. They arepairedwith Holtek's 2¹² series of encoders (refer totheencoder/decoder cross reference table). For proper operation,apair of encoder/decoder with the same number of addresses anddataformat should be chosen.

The decoders receive serial addressesanddata from a programmed 2¹² series of encoders thataretransmitted by a carrier using an RF or an IR transmissionmedium.They compare the serial input data three times continuouslywiththeir local addresses. If no error or unmatched codes arefound,the input data codes are decoded and then transferred to theoutputpins. The VT pin also goes high to indicate a validtransmission.

The 2¹² series of decodersarecapable of decoding informations that consist of N bits ofaddressand 12-N bits of data. Of this series, the HT12D is arrangedtoprovide 8 address bits and 4 data bits, and HT12F is used todecode12 bits of address information. 

Features HT12D HT12F Operating voltage: 2.4V~12V HT12D HT12F Low power and high noise immunity CMOS technology Low standby current Capable of decoding 12 bits of information Binary address setting Receired 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 Pair with Holtek's 212 series of encoders 18-pin DIP, 20-pin SOP package

技術相關信息 DataSheet RevisionHistory 封裝信息 18-pinDIP封裝 20-pinSOP封裝 問答集 應用范例 其它相關信息 SelectionGuide 產品型號索引