HT12D Decoder IC for Remote Control Systems - RS137

• 18 Pin DIP IC
• Operating Voltage : 2.4V ~ 12V
• Low Power and High Noise Immunity CMOS Technology
• Built-in Oscillator needs only 5% Resistor
• Minimal External Components

Description:

HT12D is a decoder integrated circuit that belongs to 2¹² series of decoders. This series of decoders are mainly used for remote control system applications, like a burglar alarm, car door controller, security system etc. It is mainly provided to interface RF and infrared circuits. They are paired with 2¹² series of encoders. The chosen pair of encoder/decoder should have the same number of addresses and data format. In simple terms, HT12D converts the serial input into parallel outputs. It decodes the serial addresses and data received by, say, an RF receiver, into parallel data and sends them to output data pins. The serial input data is compared with the local addresses three times continuously. The input data code is decoded when no error or unmatched codes are found. A valid transmission is indicated by a high signal at VT pin. The data on 4-bit latch type output pins remain unchanged until new is received.

Pin Description: