Holtek Encoder

The HT640/S encoder is a CMOS LSI for remote control system applications. It is paired with the HT658/S decoder. The HT640 encoder is capable of encoding 18 bits of information, which consists of 10 address bits and 8 data bits. The programmable address / data is transmitted together with the header bits via an RF or an infrared transmission medium upon receipt of a trigger signal on the TE line.

Features
· Operating voltage: 2.4V~12V
· Low power and high noise immunity CMOS technology
· Low standby current
· Capable of decoding 18 bits of information
· Pairs with HOLTEK’s HT640 encoder
· 10 address pins
· 8 data pins
· Trinary address setting
· Two times of receiving check
· Built-in oscillator needs only a 5% resistor
· Valid transmission indictor
· Easily interface with an RF or an infrared transmission medium
· Minimal external components

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