HT6221 datasheet(1/13 Pages) HOLTEK

部品番号	HT6221

部品情報	Multi-Purpose Encoders

PDF	13 Pages

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メーカー	HOLTEK [Holtek Semiconductor Inc]

ホームページ	http://www.holtek.com

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HT6221/HT6222

Multi-Purpose Encoders

Block Diagram

1

March 2, 2000

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

Applications

·

Television and video cassette recorder con-

trollers

·

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-bit 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 pro-

grammed address/data is transmitted together

with the header bits via an IR (38kHz carrier)

transmission medium.

O s c i l l at or

D i v i der

VD D

V S S

K e y boar d

Ma t r i x &

Ga t e

Ci r c u i t

¸ 24 C o u n t e r &

1 of 24 D e c o d e r

B i n a r y D et ec t o r

DO UT

D a t a S el ec t

& B u f f e r

Sy n c .

Ci r c u i t

X2

X1

R1

R8

Da t a R O M

& R egi s t er s

C1

C8

AI N

D 7

LE D

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