Holtek Semiconductor HT12A
the HT12A device, although mentioned in this datasheet, has already been phased out and is presently no longer available. 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.| Part No. | HT12A |
|---|---|
| Datasheet | HT12A Download |
| Manufacturer |  Holtek Semiconductor |
| Description | Encoders |
| Buy | Stock & Price |
FEATURES
● Operating voltage - 2.4V~5V for the HT12A - 2.4V~12V for the HT12E● Low power and high noise immunity CMOS technology
● Low standby current: 0.1mA (typ.) at VDD=5V
● HT12A with a 38kHz carrier for infrared transmission medium
● Minimum transmission word - Four words for the HT12E - One word for the HT12A
● Built-in oscillator needs only 5% resistor
● Data code has positive polarity
● Minimal external components
● Pair with Holtek¢s 212 series of decoders
● 20-pin SOP package
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 212 encoders are a series of CMOS LSIs for remote control system applications. The programmed addresses/data are transmitted together with the header bits via an RF or an infrared 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 further enhances the application flexibility of the 212 series of encoders.
