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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They can also be connected to LED to physically view the received data. Choosing Motor For Robots. They are paired with 2 12 series of encoders. 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. The input data code is decoded when no error or unmatched codes are found. Virgin Galactic — Commercial Space Flight. 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 devoder A0 to A7.

HT12D Decoder IC

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


Valid transmission; active high. Skip to main content.

These two ICs together form an Encoder and Decoder pair. For decoding a data the IC will requires an oscillatorluckily this IC has one in-built. It decodes the serial addresses and data received by, say, an RF receiver, into parallel data and sends them to output data pins. Connected to the Ground of circuit.

The data on 4 bit latch type output pins remain unchanged until new is received. What is Web Browser. Interface SD Card with Arduino. In simple terms, HT12D converts the serial input into parallel outputs. The Encoded 12 bit output data obtained from HT12E has to be given here.

It is not mandatory to use it. This pin powers the IC should use only 5V. If any valid data is received they can be obtained from these four pins. Submitted by admin on decodee October HT12D is a decoder integrated circuit that belongs to 2 12 series of decoders. So out of the bits 8-bits will be used to dcoder address and the remaining 4-bit will be used to transmit data.

A valid transmission in indicated by a high signal at VT pin. The serial input data is compared with the local addresses three times continuously. This high-density System-in-Package SiP integrates controller, power switches, and support components. A basic circuit diagram for the Decoxer 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.

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


HT12D RF Decoder IC Pinout, Details, Equivalent & Datasheet

Arduino based GPS receiver. This pin will go high when a data is received. These are the 8-bit address bits, which is used to protect your data.

It is mainly provided to interface RF and infrared circuits. It is very important that your Decoder should have the same address of that of the encoder. Choosing Battery for Robots. This oscillator can be used by connecting these two pins through a 1M Resistor. If you want security you can connect any of the 8 pins to 5V to make it high. Supply voltage; 5V 2. HT12D is capable of decoding 12 bits, of which 8 are address bits and 4 are decoxer bits. TL — Programmable Reference Voltage.

In the above circuit I have set the 8-bit address data as 0b, by connecting all address pins to ground.

HT12D Decoder IC | HT12D Datasheet | Pin Diagram

SPI Module of Arduino. This series of decoders are mainly used for remote control system applications, like burglar alarm, car door controller, security system dfcoder.

Interface GPS with Arduino. The IC has a built in oscillator. Can be used in Home automation for short range remote switching Safety systems like Burglar alarm system, Smoke or Fire alarm system etc.