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HT12E Encoder IC

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HT12E Encoder IC Image

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DataSheet: 
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.
Pin Diagram: 
HT12E Encoder IC pin diagram, pinout
Pin Description: 


 Pin No
 Function
 Name
1
8 bit Address pins for input
A0
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
Ground (0V)
Ground
10
4 bit Data/Address pins for input
AD0
11
AD1
12
AD2
13
AD3
14
Transmission enable; active low
TE
15
Oscillator input
Osc2
16
Oscillator output
Osc1
17
Serial data output
Output
18
Supply voltage; 5V (2.4V-12V)
Vcc
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