HT12B Datasheet | Holtek Semiconductor

Features - Operating voltage: - 2.4V~5V for the HT12A/B/C - 2.4V~12V for the HT12E - Low power and high noise immunity CMOS technology - Low stand-by current - Minimum transmission word: - Four words for the HT12E - One word for the HT12A/B/C Applications - Burglar alarm system - Smoke and fire alarm system - Garage door controllers - Car door controllers General Description The 212 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 - A built-in oscillator with only a 5% resistor - HT12A/B/C with a 38KHz carrier for Infra- Red transmission medium - Data code polarity: - HT12A/C/E: Positive polarity - HT12B: Negative polarity - Minimal external ponents - Car alarm system - Security system - Cordless telephones - Other remote control systems 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 or a DATA trigger on the HT12A/B/C further enhances the application flexibility of the 212 series of encoders. The HT12A/B/C additionally provides a 38KHz carrier for Infra-Red systems. Selection Table 15th Mar ’96 Block Diagram TE trigger HT12E 212 Series of Encoders DATA trigger HT12A/B/C Note: The address data pins are available in various binations (refer to the address/data table). 15th Mar ’96 212 Series of Encoders Pin Description Pin Name...