HT12D is a series decoder IC for remote control applications manufactured by Holtek. It is commonly used for radio frequency (RF) applications. Download. HT12D. 8. 4. L. Ö. RC oscillator DIN active ²Hi² 18 DIP/20 SOP .. The information appearing in this Data Sheet is believed to be accurate at the. HT12DDIP Ic-remote Control Decoder Features. Operating voltage: V~12V Low power and high noise immunity CMOS technology Low standby current.

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It decodes the serial addresses and data received by, say, an RF receiver, into parallel data and sends them to output data pins.

integrated circuit – How to get HT12D to default state? – Electrical Engineering Stack Exchange

Interface GPS with Arduino. They are capable of Encoding 12 bit of information datashewt consists of N address bits and N data bits. TL — Programmable Reference Voltage. Can be used in Home automation for short range remote switching Safety systems like Burglar alarm system, Smoke or Fire alarm system etc.

HT12D Decoder IC

A valid transmission in indicated by a high signal at VT pin. In simple terms, HT12D converts the serial input datashheet parallel outputs. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Buy 15 or more pieces to get Free Shipping Option Availability: It is not mandatory to use it.


This ICs are paired with each other. As you want the LEDs to be on datashest the data outputs are low you’ll also need inverters such as a on the data lines:. Interface SD Card with Arduino. You could also use a microcontroller if you’re familiar with programming them and you could even replace the whole HTD with one if you decoded the protocol.

When data is being transmitted continously the VT line will stay high while valid data is being received. The serial input data is compared datqsheet the local addresses three times continuously. If you want security you can connect any of the 8 pins to 5V to make it high.

HT12D Datasheet(PDF) – Holtek Semiconductor Inc

PeterJ 16k 20 42 My problem is that when I press any switch on the transmitter and cut power to the transmitter by holding push switch, the receiver end is still showing a LED output.

Post as a guest Name. This doesn’t surprise me. It is mainly provided to interface RF and infrared circuits. This series of decoders are mainly used for remote control system applications, ht122d burglar alarm, car door controller, security system etc.

Can you provide a link to the receiver. Sign up or log in Sign up using Google. Submitted by admin on 27 October TB Stepper Motor Driver 4.


I have made following project using a Holtek HTD decoder:. We should set the bits in same hht12d on Encoder and Decoder IC to pair them.

As you want the LEDs to be on when the data outputs are low you’ll also need inverters such as a on the data lines: The IC is should be powered by 5V pin 18 and the ground pin pin 9 is grounded.

HT12D is capable of decoding 12 bits, of which 8 are address bits and 4 are data bits. Easy Interface with and RF or an Infrared transmission medium. Choosing Motor For Robots. Full Name Email Address.

Another thing to note is that when I’ve used the Holtek chips in the past sometimes the VT line will ‘flicker’ because of poor communications on occasions. Thanks a lot ht12s helping us to maintain competitive prices. Customers who bought this product also purchased In the above circuit I have set the 8-bit address data as 0b, by connecting all address pins to ground.

They can also be connected to LED to physically view the received data.