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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We should set the bits in same pattern on Encoder and Decoder IC to pair them. Skip to main content.

The serial input data is compared with the local addresses three times continuously. It is mainly provided to interface RF and infrared circuits. A valid transmission in indicated by a high signal at VT pin.

Supply voltage; 5V 2. In the above circuit I have set the 8-bit address data as 0b, by connecting all address pins to ground. Can be used in Home automation for short range remote switching Safety systems ht12s Burglar alarm system, Smoke or Fire alarm system etc.

This high-density System-in-Package SiP integrates controller, power switches, and support components.


If you want security you can connect any of the 8 pins to 5V to make it high. In simple terms, HT12D converts the serial input into parallel outputs. These two ICs together form an Encoder and Decoder pair. It decodes the serial addresses and data received by, say, an RF receiver, into parallel data and sends them to output data pins. They can also be connected to LED to physically view the received data. Choosing Battery for Robots. HT12D is capable of decoding 12 bits, of which 8 are address bits and 4 are data bits.


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.

Interface GPS with Arduino. The input data code is decoded when no error or unmatched codes are found. Submitted by admin on 27 October This pin dcoder go high when a data is received. It is not mandatory to use it. Virgin Galactic — Commercial Space Flight. The 4-bit data that is received can be obtained on pins AD0 to Ht12c and an address of 8-bit has to be set using the pins A0 to A7.

HT12D RF Decoder IC Pinout, Details, Equivalent & Datasheet

Choosing Motor For Robots. Valid transmission; active high. These are the 8-bit address bits, which is used to protect your data. It is very important that your Decoder should have the same address of that of the encoder.

If any valid data is received they can be obtained from these four pins. The IC is should be powered by 5V pin 18 and the ground pin pin 9 is grounded. So if you are working cecoder 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.


The Encoded 12 bit output data obtained from HT12E has to be given here. They are paired with 2 12 series of encoders.

This series of decoders are mainly used for remote control system applications, like burglar alarm, car door controller, security system etc. The IC has a built in oscillator. Interface SD Card with Arduino. Arduino based GPS receiver. 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. H1t2d is Web Browser. The data on 4 bit latch type output pins remain unchanged until new is received.

HT12D Decoder IC

Connected to the Ground of circuit. This pin powers the IC should use only 5V. For decoding a data the IC will requires an oscillatorluckily this IC has one in-built. HT12D is a decoder integrated circuit that belongs to 2 12 series of decoders. This decdoer can be used by connecting these two pins through a 1M Resistor.

SPI Module of Arduino. 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 Yt12d which is given here.

TL — Programmable Reference Voltage.