HT12E RF Encoder IC for wireless communication

The HT12E Encoder IC designed to used only with its pair HT12D. These two ICs together form an Encoder and Decoder pair. These are 12-bit Encoders/Decoders, indicate that they can transmit 12-bit data among them. But the encoder IC should not communicate with someone else decoder IC, so an Encoder and Decoder IC pair will share a common Address which is 8-bit data. So out of these 12-bits, 8-bits used to set address and the remaining 4-bit used to transmit data.

Using these 4-bit data, we can create 16 types (2^4 =16) of combinations. These IC’s widely used with RF pairs or IR pairs. This IC pair will be ideal for applications that need the transmission of 4-bit data from one end to the other by wire or wireless. RF and IR modules communicate directly with microcontrollers, necessitating some advanced programming. It comes in two sizes: 18 and 20 pins, with just 18 working pins in each.

The HT12E’s main function is to encode a 12-bit value and send it out through the output pin. It is quite simple to make this IC operate because it has an in-built oscillator. The IC’s operational voltage ranges from 2.4 to 12 volts, however the Vcc pin (pin 18) is generally powered by +5 volts and the ground pin (pin 9) is grounded. To enable transmission, pull the Transmission Enable pin (pin 14) to the ground.

The IC will need an oscillator to decode data; fortunately, this IC already has one. To activate it, just connect the OSC1 and OSC2 (pins 15 and 16) with a 1M resistor. The pins AD0 to AD1 must be used to send the 4-bit data, and the pins A0 to A7 must be used to create an 8-bit address. It is critical that Decoder have the same address so that they can connect with one another.

Applications

• Remote control systems
• IOT
• The majority of smart devices connect with one another wirelessly, and HT12E is used to reduce the burden on the internet.
• Smoke and builder alarm system