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HT12A
Operating voltage
2.4V~5V for the HT12A
2.4V~12V for the HT12E
Low power and high noise immunity CMOS
technology
Low standby current: 0.1uA (typ.) at VDD=5V
HT12A with a 38kHz carrier for infrared transmission medium
Minimum transmission word
Four words for the HT12E
One word for the HT12A
Built-in oscillator needs only 5% resistor
Data code has positive polarity
Minimal external components
HT12A/E: 18-pin DIP/20-pin SOP package
Applications
Burglar alarm system
Smoke and fire alarm system
Garage door controllers
Car door controllers
Car alarm system
Security system
Cordless telephones
Other remote control systems

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HT12D
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
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 Holteks 2-12 series of encoders
18-pin DIP, 20-pin SOP package