HT12B

212 Series of Encoders Features Operating voltage: – 2.4V~5V for the HT12A/B/C – 2.4V~12V for the HT12E/EA Low power and high noise immunity CMOS technology Low stand-by current Minimum transmission word: – Four words for the HT12E/EA – One word for the HT12A/B/C A built-in oscillator with only a 5% resistor HT12A/B/C with a 38KHz carrier for InfraRed transmission medium Data code polarity: – HT12A/C/E/EA: Positive polarity – HT12B: Negative polarity Minimal external components www.DataSheet4U.com 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 General Description The 2 12 encoders are a series of CMOS LSIs for remote control system applications. They are capable of encoding information which consists of N address bits and 12–N data bits. Each address/data input can be set to one of the two logic states. The programmed addresses/data are transmitted together with the header bits via an RF or an Infra-Red transmission medium upon receipt of a trigger signal. The capability to select a TE trigger on the HT12E/EA or a DATA trigger on the HT12A/B/C further enhances the application flexibility of the 2 12 series of encoders. The HT12A/B/C additionally provides a 38KHz carrier for Infra-Red systems. Selection Table Function Address Address/ Data Oscillator Trigger Item No. Data No. No. HT12A HT12B HT...