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Product Description (Detailed):

Unlock reliable wireless communication in your projects with the HT12D Decoder IC, a cornerstone component in the HT12X Series Remote Control Decoder ICs. Housed in a convenient 18-Pin DIP (Dual In-line Package), this integrated circuit is specifically designed to work in tandem with its encoder counterpart, typically the HT12E, to establish a secure and efficient RF communication link. The HT12D's core function is to receive serial data from a wireless RF module (e.g., a 433MHz ASK receiver) and convert it back into parallel output signals. It intelligently decodes a 12-bit data stream, comprising 8 address bits and 4 data bits. The 8 address bits provide a high level of security, allowing for 28 (256) unique address combinations, ensuring that only the paired encoder can activate the decoder. Upon successful reception and triple verification of the matching address code, the 4 data bits are presented on the output pins, along with a "Valid Transmission" (VT) pin going HIGH to indicate decoded data presence. Operating over a versatile supply voltage range (typically 2.4V to 12V), and featuring a low power CMOS technology with high noise immunity, the HT12D is ideal for a myriad of wireless control applications. From burglar alarm systems and garage door controllers to car alarm systems and various DIY home automation projects, this RF communication IC offers simplicity, reliability, and robust decoding capabilities for your wireless needs.

The HT12D Decoder IC is part of the Holtek 212 series, specifically designed to work in tandem with the HT12E encoder. It is widely used in wireless remote control systems using RF or infrared communication.

This IC decodes 12-bit serial data (8 address bits + 4 data bits) transmitted by an HT12E encoder over an RF or IR link. The VT (Valid Transmission) pin goes HIGH when a valid signal is received, and the output pins (D0–D3) reflect the transmitted data.

This makes the HT12D ideal for controlling relays, motors, lights, and other appliances wirelessly with the help of 433MHz RF modules.

Key Features:

• Compatible with HT12E encoder IC

• 12-bit data decoder: 8 address + 4 data bits

• Works with RF and IR transmission modules (433MHz)

• Low power consumption, built-in oscillator

• Ideal for wireless remote control applications

• Standard 18-pin DIP package for easy breadboard use

Technical Specifications:

How to Use:

1. Connect HT12D to a 433MHz RF receiver module.

2. Match the address pins (A0–A7) on both encoder (HT12E) and decoder (HT12D).

3. Apply a 51KΩ resistor between OSC1 and OSC2 pins.

4. Use VT pin to detect valid transmission.

5. Read data from D0 to D3 output pins to control loads like relays, LEDs, etc.

Ensure proper power supply (typically 5V) and correct address matching for accurate communication.

Applications:

• RF-based wireless remote control systems

• Home automation and wireless switching

• Robotics – wireless control of motors and actuators

• Garage door and gate control

• RFID tag & access control systems

• Infrared remote data reception

Package Includes:

• 1 × HT12D Decoder IC – 18-pin DIP