HT12D is a series decoder IC for remote control applications manufactured by Holtek. It is commonly used for radio frequency (RF) applications. Download. Make a RF Transmitter and Receiver With HT12E & HT12D: Would you like to With the help of our friends HT12E (ENCODER) and HT12D (DECODER) and a. The HT12D is a 2^12 decoder in 18 pin DIP package. This decoder is a series of CMOS LSIs for remote control system applications. It is paired with Holtek’s.

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HT12D Decoder IC

A basic circuit diagram for the HT12D IC is shown below In the above circuit I have set the 8-bit address data as 0b, by connecting all address pins to ground. This pin powers the IC should use only 5V.

They can also be connected to LED to physically view the received data. The Encoded 12 bit output data obtained from HT12E has to be given here.

If any valid data is received they can be obtained from these four pins. It is very important that your Decoder should have the same address of that of the encoder. SPI Module of Arduino. A valid transmission in indicated by a high signal at VT pin. It decodes the serial addresses and data received by, say, an RF receiver, into parallel data and sends them to output data pins.

In the above circuit I have set the 8-bit address data as 0b, by connecting all address pins to ground. HT12D is a decoder integrated circuit that belongs to 2 12 series of decoders. Skip to main content. Submitted by admin on 27 October The 4-bit data that is received can be obtained on pins AD0 to AD1 and an address of 8-bit has to be set using the pins A0 to A7.


In simple terms, HT12D converts the serial input into parallel outputs.


Valid transmission; active high. It is not mandatory to use it. Can be used in Home automation for short range remote switching Safety systems like Burglar alarm system, Smoke or Fire alarm system etc.

If you want security deecoder can connect any of the 8 pins to 5V to make it high. This series of decoders are mainly used for remote control system applications, like burglar alarm, car door controller, security system etc.

It is mainly provided to interface RF and infrared circuits.

Supply voltage; 5V 2. Interface SD Card with Arduino. We should set the bits in same pattern on Encoder and Decoder IC to pair them. The IC is should be powered by 5V pin 18 and the ground pin pin 9 is grounded.

For decoding a data the IC will requires an oscillatorluckily this IC has one in-built.

HT12D Decoder IC | HT12D Datasheet | Pin Diagram

The serial input data is compared with the local addresses three times continuously. Choosing Motor For Robots. Interface GPS with Arduino. Virgin Galactic — Commercial Space Flight.

To know how a 4-bit data can be encoded and then send to the input pin of this IC, we have to understand the working of the HT12E Encoder IC which is given here.


So if you are working on a project which has to transmit a 4-bit data from one end edcoder other either by wire or wireless then this IC pair will be best suited for you.

Choosing Battery for Robots. These two ICs together form an Encoder and Decoder pair. They are paired with 2 12 series of encoders. This pin will go high when a data is received.

HT12D is capable of decoding 12 bits, of which 8 are address bits ht12x 4 are data bits. What is Web Browser. TL — Programmable Reference Voltage. Connected to the Ground of circuit. This oscillator can be used by connecting these two pins through a 1M Resistor 17 Valid Transmission VT This pin will go high when a data is received. Arduino based GPS receiver.

The IC has a built in oscillator. This oscillator can be used by connecting these two pins through a 1M Resistor. So out of the bits 8-bits will be used to set address ht112d the remaining 4-bit will be used to transmit data. The data on 4 bit latch type output pins remain unchanged until new is received.

HT12D RF Decoder IC Pinout, Details, Equivalent & Datasheet

These are the 8-bit address bits, which is used to protect your data. The input data code is decoded when no error or unmatched codes are found. This high-density System-in-Package SiP integrates controller, power switches, and support components.