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HT12E & HT12D RF Decoder ICs- (Encoder/Decoder Pair)

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Product Code: ERICS001


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HT12E is an encoder integrated circuit of 212 series of encoders. They are paired with 212 series of decoders for use in remote control system applications. It is mainly used in interfacing RF and infrared circuits. The chosen pair of encoder/decoder should have same number of addresses and data format.
Simply put, HT12E converts the parallel inputs into serial output. It encodes the 12 bit parallel data into serial for transmission through an RF transmitter. These 12 bits are divided into 8 address bits and 4 data bits. HT12E has a transmission enable pin which is active low. When a trigger signal is received on TE pin, the programmed addresses/data are transmitted together with the header bits via an RF or an infrared transmission medium. HT12E begins a 4-word transmission cycle upon receipt of a transmission enable. This cycle is repeated as long as TE is kept low. As soon as TE returns to high, the encoder output completes its final cycle and then stops.
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 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 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 in indicated by a high signal at VT pin. HT12D is capable of decoding 12 bits, of which 8 are address bits and 4 are data bits. The data on 4 bit latch type output pins remain unchanged until new is received.

Technical Specifications:

Features of HT12E Encoder IC:-
  • Operating voltage: 2.4V~12V.
  • Low power and high noise immunity CMOS technology.
  • Low standby current: 0.1A (typ.) at VDD=5V.
  • Data code has positive polarity.
  • HT12A with a 38kHz carrier for infrared transmission medium.
  • Minimum transmission word Four words for the HT12E.
  • Built-in oscillator needs only 5% resistor.
  • Minimal external components.

 Features of HT12D Decoder IC:-

  • Operating voltage: 2.4V~12V
  • Low power and high noise immunity CMOS technology
  • Low standby current
  • Capable of decoding 12 bits of information
  • Binary address setting
  • Received codes are checked 3 times
  • Address/Data number combination
  • HT12D: 8 address bits and 4 data bits
  • Built-in oscillator needs only 5% resistor
  • Valid transmission indicator
  • Easy interface with an RF or an infrared transmission medium
  • Minimal external components
  • Pair with Holteks212 series of encoders
  • 18-pin DIP

Package Includes:

  • 1 Piece Each- HT12E & HT12D RF Decoder ICs- (Encoder/Decoder Pair)
Weight 15 g

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Good quality.Good service.The product is firmly packed.Very fast delivery.Very well worth the money.

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