HT683L_技术文档

18

3 Series of Decoders

Features

•

Operating voltage: 2.4V~12V

Low power and high noise immunity CMOS

technology

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

•

Low standby current

Capable of decoding 18 bits of information

Pairs with HOLTEK’s 3¹⁸series of encoders

8~18 address pins

•

Minimal external components

0~8 data pins

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

General Description

The 3¹⁸decoders are a series of CMOS LSIs for

remote control system applications. They are

paired with the 3¹⁸series of encoders. For

proper operation a pair of encoder/decoder pair

with the same number of address and data

format should be selected (refer to the en-

coder/decoder cross reference tables).

The 3¹⁸series of decoders receives serial ad-

dress and data from that series of encoders that

are transmitted by a carrier using an RF or an

IR transmission medium. It then compares the

serial input data twice continuously with its

local address. If no errors or unmatched codes

are encountered, the input data codes are de-

coded and then transferred to the output pins.

The VT pin also goes high to indicate a valid

transmission.

The 3¹⁸decoders are capable of decoding 18 bits

of information that consists of N bits of address

and 18–N bits of data. To meet various applica-

tions they are arranged to provide a number of

data pins whose range is from 0 to 8 and an

address pin whose range is from 8 to 18. In

addition, the 3¹⁸decoders provide various com-

binations of address/data number in different

packages.

Selection Table

F u n ct ion

Da ta

Ad d r ess

No.

VT Oscilla tor

Tr igger

P a ck a ge

Item

HT602L

No. Typ e

12

10

9

2

4

5

0

L

√

RC oscillator DIN active “Hi” 20 DIP/20 SOP

HT604L

HT605L

HT611

L

14

—

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3

Series of Decoders

F u n ct ion

Da ta

Ad d r ess

No.

VT Oscilla tor

Tr igger

P a ck a ge

Item

HT612

No. Typ e

12

10

9

2

4

5

4

6

8

0

4

6

8

2

3

4

0

2

3

4

M

L

√

RC oscillator DIN active “Hi” 20 DIP/20 SOP

RC oscillator DIN active “Hi” 24 SOP/24 SDIP

RC oscillator DIN active “Hi” 18 DIP

HT614

HT615

HT644L

HT646L

HT648L

HT651

HT654

HT656

HT658

HT682L

HT683L

HT684L

HT691

HT692

HT693

HT694

14

12

10

18

14

12

10

9

L

—

M

L

RC oscillator DIN active “Hi” 18 DIP

8

L

RC oscillator DIN active “Hi” 18 DIP

12

10

9

—

M

RC oscillator DIN active “Hi” 18 DIP

8

RC oscillator DIN active “Hi” 18 DIP

Note: Data type: M represents momentary type of data output.

L represents latch type of data output.

VT can be used as a momentary data output.

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3

Series of Decoders

Block Diagram

Note: The address/data pins are available in various combinations

(refer to the address/data table).

Pin Description

In ter n a l

Con n ection

P in Na m e I/O

Descr ip t ion

TRANSMISSION Input pins for address A0~A17 setting

A0~A17

I

GATE

CMOS OUT

CMOS IN

CMOS OUT

OSCILLATOR

—

They can be externally set to VDD, VSS, or left open.

D10~D17

DIN

O

I

Output data pins

Serial data input pin

VT

O

I

Valid transmission, active high

Oscillator input pin

OSC1

OSC2

VSS

O

I

Oscillator output pin

Negative power supply (GND)

Positive power supply

VDD

I

—

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3

Series of Decoders

Approximate internal connection circuits

Absolute Maximum Ratings*

Supply Voltage ............................... –0.3V to 13V

Input Voltage..................V_SS–0.3V to V_DD+0.3V

Storage Temperature................. –50°C to 125°C

Operating Temperature............... –20°C to 75°C

*Note: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent

damage to the device. These are stress ratings only. Functional operation of this device at

these or any other conditions above those indicated in the operational sections of this

specification is not implied and exposure to absolute maximum rating conditions for extened

periods may affect device reliability.

Electrical Characteristics

(Ta=25°C)

Test Con d ition s

Sym bol

V_DD

P a r a m eter

Operating Voltage

Standby Current

Min . Typ . Ma x. Un it

V_DD

Con d ition s

—

5V

—

3

—

0.1

2

12

1

V

—

µA

I_STB

Oscillator stops

12V

4

No load

I_DD

Operating Current

5V

—

–0.5

0.5

0.2

–1

1

mA

F

_OSC=100kHz

Data Output Source Current

(D10~D17)

V

_OH=4.5V

_OL=0.5V

—

I_O

Data Output Sink Current

(D10~D17)

VT Output Source Current

VT Output Sink Current

“H” Input Voltage

V_OH=4.5V

–2

1

–4

2

—

5

mA

V

I_VT

5V

V

_OL=0.5V

V_IH

5V

—

3.5

0

—

100

V_IL

“L” Input Voltage

1

V

F_OSC

Oscillator Frequency

10V R_OSC=330kΩ

—

kHz

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Series of Decoders

Functional Description

Operation

Flowchart

The 3¹⁸series of decoders provides various com-

binations of address and data pins in different

packages. It is paired with the 3¹⁸series of

encoders. The decoders receive data transmit-

ted by the encoders and interpret the first N

bits of the code period as address and the last

18–N bits as data (where N is the address code

number). A signal on the DIN pin then activates

the oscillator which in turns decodes the incom-

ing address and data. The decoders will check

the received address twice continuously. If all

the received address codes match the contents

of the decoder ’s local address, the 18–N bits of

data are decoded to activate the output pins,

and the VT pin is set high to indicate a valid

transmission. That will last until the address

code is incorrect or no signal has been received.

The output of the VT pin is high only when the

transmission is valid. Otherwise it is low al-

ways.

Output type

There are 2 types of output to select from:

•

Momentary type

The data outputs follow the encoder during a

valid transmission and then reset.

•

Latch type

The data outputs follow the encoder during a

valid transmission, and are then latched in

this state until the next valid transmission

occurs.

Note: Th e oscilla t or is dis a bled in t h e

standby state and activated as long as

a logic “high” signal is applied to the

DIN pin. i.e., the DIN should be kept

“low” if there is no signal input.

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Series of Decoders

Decoder timing

Encoder/Decoder selection tables

•

Latch type of data output

P a ck a ge

Da t a Ad d r ess

P a r t No.

VT P a ir En cod er

En cod er

SOP SDIP DIP

Decod er

SOP SDIP

P in s

DIP

18

20

24

HT682L

HT683L

2

3

10

9

√

HT680

HT6187

HT680

HT600

HT6207

HT600

HT640

HT6247

HT640

—

20

—

20

24

—

24

—

18

—

18

—

HT684L

HT602L

4

2

8

√

—

18

20

—

20

—

12

HT604L

4

10

√

—

20

—

HT605L

HT644L

5

4

9

√

—

24

20

—

20

24

—

24

14

HT646L

HT648L

6

8

12

10

√

24

—

24

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3

Series of Decoders

•

Momentary type of data output

P a ck a ge

Da t a Ad d r ess

P a r t No.

VT P a ir En cod er

En cod er

Decod er

P in s

DIP

18

20

24

SOP SDIP DIP SOP SDIP

HT691

HT692

0

2

12

10

√

HT680

HT6187

HT680

HT600

HT6207

HT600

HT640

HT6247

HT640

—

20

—

20

24

—

24

—

18

—

HT693

3

9

√

—

18

—

HT694

HT611

HT612

4

0

2

8

√

—

18

20

—

20

—

14

12

HT614

4

10

√

—

20

—

HT615

HT651

HT654

5

0

4

9

√

—

24

20

—

20

24

—

24

18

14

HT656

HT658

6

8

12

10

√

24

—

24

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3

Series of Decoders

Address/Data sequence

The following provides a table of address/data sequence for various models of the 3¹⁸series decoders.

A correct device should be selected according to the requirements of individual address and data.

Ad d r ess/Da ta Bit s

P a r t No.

0~3

4

5

6~9

10

—

11

12

13

14

15

16

—

17

—

HT602L

HT604L

HT605L

HT611

A0~A3

A4

—

A6~A9

A11 A12 A13 D14 D15

A11 D12 D13 D14 D15

D11 D12 D13 D14 D15

A11 A12 A13 A14 A15

A11 A12 A13 D14 D15

A11 D12 D13 D14 D15

D11 D12 D13 D14 D15

HT612

HT614

HT615

HT644L

HT646L

HT648L

HT651

HT654

HT656

HT658

HT682L

HT683L

HT684L

HT691

HT692

HT693

HT694

A5 A6~A9 A10 A11 A12 A13 D14 D15 D16 D17

A5 A6~A9 A10 A11 D12 D13 D14 D15 D16 D17

A5 A6~A9 D10 D11 D12 D13 D14 D15 D16 D17

A5 A6~A9 A10 A11 A12 A13 A14 A15 A16 A17

A5 A6~A9 A10 A11 A12 A13 D14 D15 D16 D17

A5 A6~A9 A10 A11 D12 D13 D14 D15 D16 D17

A5 A6~A9 D10 D11 D12 D13 D14 D15 D16 D17

—

A6~A9

—

A11 A12

A11 D12

D11 D12

A11 A12

A11 D12

D11 D12

—

D14 D15

A14 A15

D14 D15

—

Note: “—” is a dummy code which is left “open” and not bonded out.

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3

Series of Decoders

Oscillator frequency vs supply voltage

The recommended oscillator frequency is F_OSCD(decoder) F_OSCE(encoder).

9

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3

Series of Decoders

Package Information

Latch series

10

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3

Series of Decoders

Momentary series

11

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3

Series of Decoders

Momentary series

12

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3

Series of Decoders

Application Circuits

13

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3

Series of Decoders

Note: Typical infrared receiver: PIC-12043T/PIC-12043C (KODENSHI CORP.)

or LTM9052 (LITEON CORP.)

Typical RF receiver: J R-200 (J UWA CORP.)

RE-99 (MING MICROSYSTEM, U.S.A.)

14

2nd Oct ’97


型号：	HT683L
厂家：	HOLTEK SEMICONDUCTOR INC
描述：	318 Series of Decoders 318系列的解码器解码器
文件：	总14页 (文件大小：839K)
中文：	中文翻译
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HT683L [HOLTEK]

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