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HT12E Holtek Encoder 12-Bit (for RF Remote Control)

HT12 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 12N 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 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. The HT12A additionally provides a 38kHz carrier for infrared systems.

Features

Operating voltage: 2.4V - 12V

Case: HT12A/E: 18-pin DIP

Low power and high noise immunity CMOS technology

Low standby current: 0.1A (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

Applications

RF Remote Control

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