HT6280 Datasheet | Holtek Microelectronics

HT6280 Car Alarm Decoder Features - Operating voltage: 3V~5V - Low power dissipation and high noise im- munity CMOS technology - A built-in oscillator with only a 5% resistor - 312 trinary address codes - 6 decoder control data outputs General Description The HT6280 is an 18-bit decoder CMOS LSI designed for use in remote control car alarm system. When plemented by one of the TE triggered HT600/HT640/HT680 or DATA triggered HT6187/HT6207/HT6247 encoder ICs from a range of 318 series of encoders, a plete remote car alarm system can be formed. The details on the 318 encoders can be found in the relevant databook encoder section. - 3 local alarm trigger inputs: - TRIG, AL+, AL- - A valid transmission indicator (LED) - ACC disarms the whole car alarm system - Easily interface with an RF or an IR medium After receiving the 18 bits of information from the encoder the HT6280 interprets the first 12 bits as address and the last 6 bits as control signal data. If these received 12 bits of address matches that of the locally set address then the 6 data bits are latched and the control function executed. Three types of control function are incorporated in the device, these are arm/disarm, panic and power on/off. The HT6280 also provides 3 momentary data outputs for other user defined special purposes. 1 12th Apr ’96 Pin Assignment 2 12th Apr ’96 Block Diagram Pin Description - 40 Pins Pin No. Pin Name I/O Internal Connection Description 1 OSC2 I OSCILLATOR Oscillator output pin 2 DIN I CMOS IN Serial data input pin 3~5 NC - - No...