General Description

The HT6221/HT6222 are CMOS LSI encoders designed for use in remote control systems. They are capable of encoding 16-bit address codes and 8-bit data codes. Each address/data input can be set to one of the two logic states, 0 and 1.

Features

• Operating voltage: 1.8V~3.5V

• DOUT with 38kHz carrier for IR medium

• Low standby current

• Minimum transmission word: one word

• 455kHz ceramic resonator or crystal

• 16-bit address codes

• 8-bit data codes

• PPM code method

• Three double-active keys

• Maximum active keys HT6221: 32 keys HT6222: 64 keys

• Low power and high noise immunity CMOS technology

• HT6221: 20-pin SOP package HT6222: 24-pin SOP package

Applications

• Television and video cassette recorder controllers

• Burglar alarm systems

• Smoke and fire alarm systems

• Garage door controllers

• Car door controllers

• Car alarm systems

• Security systems

• Other remote control systems