General Description

The 212 decoders are a series of CMOS LSIs for remote control system applications. They are paired with Holteks 212 series of encoders (refer to the encoder/decoder cross reference table). For proper operation, a pair of encoder/decoder with the same number of addresses and data format should be chosen

Features

• Operating voltage: 2.4V~12V

• Low power and high noise immunity CMOS technology

• Low standby current

• Capable of decoding 12 bits of information

• Binary address setting

• Received codes are checked 3 times

• Address/Data number combination

- HT12D: 8 address bits and 4 data bits

- HT12F: 12 address bits only

• Built-in oscillator needs only 5 resistor

• Valid transmission indicator

• Easy interface with an RF or an infrared transmission medium

• Minimal external components

• Pair with Holteks 212 series of encoders

• 18-pin DIP, 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