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 com Applications • • • • Burglar alarm system Smoke and fire alarm system Garage door controllers Car door controllers • • • • Car alarm system Security system Cordless teleph...

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