HT12D is a 12Bit series decoder IC for remote control applications. It is commonly used for radio frequency (RF) wireless applications. By using the paired HT12E encoder and HT12D decoder we can transmit 12 bits of parallel data serially. HT12D simply converts serial data to its input (may be received through RF receiver) to 12 bit parallel data. These 12 bit parallel data are divided into 8 address bits and 4 data bits. Using 8 address bits we can provide 8-bit security code for 4-bit data and can be used to address multiple receivers by using the same transmitter.

HT12D is a CMOS LSI IC and is capable of operating from 2.4V to 12V. Its power consumption is low and has high immunity against noise. The received data is checked 3 times for more accuracy. It has a built-in oscillator, we only need to connect a small external resistor.

Specifications:
Standby Current Max.: 4µA
Operating Voltage Max.: 12V
Operating Current Max.: 400µA
Output Drive Current: 1.6mA
Oscillator Frequency: 150kHz
Supply Voltage Range: 2.4V to 12V
Pins: 8 Address Pin, 4 Data Pin
Package: DIP-18

Applications:
Suitable to use for a burglar alarm system, smoke and fire alarm system, garage door controllers, and car door controllers.

Simple Circuit for IC HT12D Decoder: