Product Overview
The HT12D is a 212 series CMOS decoder IC designed to work in pair with the HT12E encoder. Its main function is to receive the coded serial data transmitted by the encoder, check the address bits for a match, and then decode the 4-bit data, making it available as parallel outputs. It is widely used in wireless remote control applications such as garage doors, lighting systems, alarms, and remote switches.
Key Technical Features:
- CMOS LSI technology with low power consumption.
- 12-bit decoding: 8 bits for address and 4 bits for data.
- Capable of handling 4096 address combinations.
- Serial data input (DIN) to receive encoded signal.
- Valid Transmission (VT) pin indicates when a valid signal is received.
- 4 data output pins (D0–D3) provide decoded parallel data.
- Operating voltage: 2.4V to 12 DC(typ 5v).
- External oscillator controlled by a resistor.
Pinout
