HT6221/HT6222

Multi-Purpose Encoders

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Features

Operating voltage: 1.8 ~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

-HT6221:32keys

-HT6222:64keys

Low power and high nose immunity

CMOS technology

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

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-bits data codes. Each address/data input can be set to one of the two logic states, 0 and 1.

The HT6221/HT6222 contain 32 keys (K1~K32) and 64 keys (K1 ~ K64), respectively. When one of the keys is triggered, the

programmed address/data is transmitted together with the header bits via an IR (38kHz carrier) transmission medium.

Block Diagram