SeriesofDecoders 12 HT12D/HT12F2

(1)

2 ¹² Series of Decoders

Selection Table

Function Address No.

Data VT Oscillator Trigger Package

Part No. No. Type

HT12D 8 4 L Ö RC oscillator DIN active²Hi² 18DIP, 20SOP

HT12F 12 0 ¾ Ö RC oscillator DIN active²Hi² 18DIP, 20SOP

Notes: Data type: L stands for latch type data output.

VT can be used as a momentary data output.

General Description

The 2¹²decoders are a series of CMOS LSIs for remote control system applications. They are paired with Holtek¢s 2¹²series of encoders (refer to the encoder/decoder cross reference table). For proper operation, a pair of encoder/decoder with the same number of addresses and data format should be chosen.

The decoders receive serial addresses and data from a programmed 2¹²series of encoders that are transmitted by a carrier using an RF or an IR transmission medium.

They compare the serial input data three times continu-

ously with their local addresses. If no error or un- matched codes are found, the input data codes are decoded and then transferred to the output pins. The VT pin also goes high to indicate a valid transmission.

The 2¹²series of decoders are capable of decoding informations that consist of N bits of address and 12-N bits of data. Of this series, the HT12D is arranged to pro- vide 8 address bits and 4 data bits, and HT12F is used to decode 12 bits of address information.

Features

· Operating voltage: 2.4V~12V

· Low power and high noise immunity CMOS technology

· Low standby current

· Capable of decoding 12 bits of information

· Binary address setting

· Received codes are checked 3 times

· Address/Data number combination -HT12D: 8 address bits and 4 data bits -HT12F: 12 address bits only

· Built-in oscillator needs only 5% resistor

· Valid transmission indicator

· Easy interface with an RF or an infrared transmission medium

· Minimal external components

· Pair with Holtek¢s 2¹²series of encoders

· 18-pin DIP, 20-pin SOP package

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

(2)

Block Diagram

Note: The address/data pins are available in various combinations (see the address/data table).

Pin Assignment

Pin Description

Pin Name I/O Internal

Connection Description

A0~A11 (HT12F)

I NMOS

Transmission Gate

Input pins for address A0~A11 setting

These pins can be externally set to VSS or left open.

A0~A7 (HT12D) Input pins for address A0~A7 setting

These pins can be externally set to VSS or left open.

D8~D11 (HT12D) O CMOS OUT Output data pins, power-on state is low.

DIN I CMOS IN Serial data input pin

VT O CMOS OUT Valid transmission, active high

OSC1 I Oscillator Oscillator input pin

OSC2 O Oscillator Oscillator output pin

VSS ¾ ¾ Negative power supply, ground

VDD ¾ ¾ Positive power supply

D a t a S h i f t R e g i s t e r O s c i l l a t o r

B u f f e r S y n c . D e t e c t o r

D i v i d e r

C o m p a r a t o r C o m p a r a t o r

B u f f e r T r a n s m i s s i o n G a t e C i r c u i t

D a t a D e t e c t o r

C o n t r o l L o g i c O S C 1

O S C 2

D I N

V D D V S S

V T D a t a L a t c h C i r c u i t

A d d r e s s

8 - A d d r e s s

4 - D a t a 1 2 - A d d r e s s

0 - D a t a

A 0 A 1 A 2 A 3 A 4 A 5 A 6 A 7 V S S

V D D V T O S C 1 O S C 2 D I N D 1 1 D 1 0 D 9 D 8

123456789

1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 1 0

1 2 - A d d r e s s 0 - D a t a

A 0 A 1 A 2 A 3 A 4 A 5 A 6 A 7 V S S

V D D V T O S C 1 O S C 2 D I N A 1 1 A 1 0 A 9 A 8

123456789

1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 1 0

123456789

1 0 2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1

N C V D D V T O S C 1 O S C 2 D I N A 1 1 A 1 0 A 9 A 8 N C

A 0 A 1 A 2 A 3 A 4 A 5 A 6 A 7 V S S 8 - A d d r e s s

4 - D a t a

123456789

1 0 2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1

N C V D D V T O S C 1 O S C 2 D I N D 1 1 D 1 0 D 9 D 8 N C

A 0 A 1 A 2 A 3 A 4 A 5 A 6 A 7 V S S

H T 1 2 F 2 0 S O P - A H T 1 2 F

1 8 D I P - A H T 1 2 D

2 0 S O P - A

(3)

Approximate internal connection circuits

Absolute Maximum Ratings

Supply Voltage ...-0.3V to 13V Storage Temperature ...-50°C to 125°C Input Voltage ...V_SS-0.3 to VDD+0.3V Operating Temperature...-20°C to 75°C Note: These are stress ratings only. Stresses exceeding the range specified under²Absolute Maximum Ratings² may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil- ity.

Electrical Characteristics

Ta=25°C

Symbol Parameter Test Conditions

Min. Typ. Max. Unit VDD Conditions

VDD Operating Voltage ¾ ¾ 2.4 5 12 V

I_STB Standby Current

5V

Oscillator stops ¾ 0.1 1 mA

12V ¾ 2 4 mA

IDD Operating Current 5V No load, fOSC=150kHz ¾ 200 400 mA

IO

Data Output Source Current (D8~D11) 5V VOH=4.5V -1 -1.6 ¾ mA

Data Output Sink Current (D8~D11) 5V VOL=0.5V 1 1.6 ¾ mA

IVT

VT Output Source Current

5V

V_OH=4.5V -1 -1.6 ¾ mA

VT Output Sink Current V_OL=0.5V 1 1.6 ¾ mA

V_IH ²H² Input Voltage 5V ¾ 3.5 ¾ 5 V

V_IL ²L² Input Voltage 5V ¾ 0 ¾ 1 V

f_OSC Oscillator Frequency 5V ROSC=51kW ¾ 150 ¾ kHz

N M O S

T r a n s m i s s i o n G a t e O s c i l l a t o r

O S C 1E N O S C 2

C M O S I N C M O S O U T

(4)

Decoder timing

Functional Description

Operation

The 2¹²series of decoders provides various combinations of addresses and data pins in different packages so as to pair with the 2¹²series of encoders.

The decoders receive data that are transmitted by an encoder and interpret the first N bits of code period as addresses and the last 12-N bits as data, where N is the address code number. A signal on the DIN pin activates the oscillator which in turn decodes the incoming address and data. The decoders will then check the received address three times continuously. If the received address codes all match the contents of the decoder¢s local address, the 12-N bits of data are decoded to acti- vate the output pins and the VT pin is set high to indicate a valid transmission. This will last unless the address code is incorrect or no signal is received.

The output of the VT pin is high only when the transmission is valid. Otherwise it is always low.

Output type

Of the 2¹²series of decoders, the HT12F has no data output pin but its VT pin can be used as a momentary data output. The HT12D, on the other hand, provides 4 latch type data pins whose data remain unchanged until new data are received.

Part No.

Data Pins

Address Pins

Output Type

Operating Voltage

HT12D 4 8 Latch 2.4V~12V

HT12F 0 12 ¾ 2.4V~12V

Flowchart

The oscillator is disabled in the standby state and acti- vated when a logic²high² signal applies to the DIN pin.

That is to say, the DIN should be kept low if there is no signal input.

Y e s C o d e i n ?

S t o r e d a t a N o

Y e s

N o

Y e s S t a n d b y m o d e

D i s a b l e V T &

i g n o r e t h e r e s t o f t h i s w o r d

Y e s

N o

Y e s A d d r e s s o r d a t a e r r o r ? L a t c h d a t a t o o u t p u t &

a c t i v a t e V T A d d r e s s b i t s

m a t c h e d ?

M a t c h p r e v i o u s s t o r e d

d a t a ? P o w e r o n

3 t i m e s o f c h e c k i n g c o m p l e t e d ?

2 c l o c k s^{1 4} c h e c k

4 w o r d s 4 w o r d s

E n c o d e r D O U T

T r a n s m i t t e d C o n t i n u o u s l y

< 1 w o r d E n c o d e r

T r a n s m i s s i o n E n a b l e

c h e c k D e c o d e r V T

L a t c h e d D a t a O u t

2 c l o c k s^{1 4}

(5)

Encoder/Decoder cross reference table

Decoders

Part No. Data Pins Address Pins VT Pair Encoder

Package

Encoder Decoder

DIP SOP DIP SOP

HT12D 4 8 Ö HT12A

HT12E 18 20 18 20

HT12F 0 12 Ö HT12A

HT12E 18 20 18 20

Address/Data sequence

The following table provides address/data sequence for various models of the 2¹²series of decoders.

Part No. Address/Data Bits

0 1 2 3 4 5 6 7 8 9 10 11

HT12D A0 A1 A2 A3 A4 A5 A6 A7 D8 D9 D10 D11

HT12F A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11

Oscillator frequency vs supply voltage

Note: The recommended oscillator frequency is fOSCD(decoder)@ 50 fOSCE(HT12E encoder)

@1

3fOSCE(HT12A encoder).

f o s c ( S c a l e )

R o s c ( 9 )

0 . 5 0 ( 1 0 0 k H z ) 1 . 0 0 1 . 5 0 2 . 0 0 2 . 5 0 3 . 5 0 4 . 0 0

3 . 0 0

0 . 2 5

2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 V D D ( V D C )

6 8 k 9 6 2 k 9 5 6 k 9 5 1 k 9 4 7 k 9 4 3 k 9 3 9 k 9 3 6 k 9 3 3 k 9 3 0 k 9 2 7 k 9

7 5 k 9 8 2 k 9 1 0 0 k 9 1 2 0 k 9 1 5 0 k 9 1 8 0 k 9 2 2 0 k 9

(6)

Application Circuits

R e c e i v e r C i r c u i t

0 6 ,

A 0 A 1 A 2 A 3 A 4 A 5 A 6 A 7 V S S

V D D V T O S C 1 O S C 2 D I N D 1 1 D 1 0 D 9 D 8

123456789

1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 1 0

R O S C

V D D

R e c e i v e r C i r c u i t

0 6 .

A 0 A 1 A 2 A 3 A 4 A 5 A 6 A 7 V S S

V D D V T O S C 1 O S C 2 D I N A 1 1 A 1 0 A 9 A 8

123456789

1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 1 0

R O S C

V D D

(7)

Package Information

18-pin DIP (300mil) outline dimensions

Symbol Dimensions in mil

Min. Nom. Max.

A 895 ¾ 915

B 240 ¾ 260

C 125 ¾ 135

D 125 ¾ 145

E 16 ¾ 20

F 50 ¾ 70

G ¾ 100 ¾

H 295 ¾ 315

I 335 ¾ 375

a 0° ¾ 15°

1 8

1

1 0

9 =

A

BCD E F G HI

(8)

20-pin SOP (300mil) outline dimensions

Symbol Dimensions in mil

Min. Nom. Max.

A 394 ¾ 419

B 290 ¾ 300

C 14 ¾ 20

C¢ 490 ¾ 510

D 92 ¾ 104

E ¾ 50 ¾

F 4 ¾ ¾

G 32 ¾ 38

H 4 ¾ 12

a 0° ¾ 10°

2 0

1

1 1

1 0

A B

C

D E F

C ' G H

=

(9)

Product Tape and Reel Specifications

Reel dimensions

SOP 20W

Symbol Description Dimensions in mm

A Reel Outer Diameter 330±1.0

B Reel Inner Diameter 62±1.5

C Spindle Hole Diameter 13.0+0.5

-0.2

D Key Slit Width 2.0±0.5

T1 Space Between Flange 24.8+0.3

-0.2

T2 Reel Thickness 30.2±0.2

A CB

T 1

T 2 D

(10)

Carrier tape dimensions

SOP 20W

Symbol Description Dimensions in mm

W Carrier Tape Width 24.0+0.3

-0.1

P Cavity Pitch 12.0±0.1

E Perforation Position 1.75±0.1

F Cavity to Perforation (Width Direction) 11.5±0.1

D Perforation Diameter 1.5+0.1

D1 Cavity Hole Diameter 1.5+0.25

P0 Perforation Pitch 4.0±0.1

P1 Cavity to Perforation (Length Direction) 2.0±0.1

A0 Cavity Length 10.8±0.1

B0 Cavity Width 13.3±0.1

K0 Cavity Depth 3.2±0.1

t Carrier Tape Thickness 0.3±0.05

C Cover Tape Width 21.3

P

D 1

W

P 1 D P 0

EF t

K 0 B 0

A 0

C

(11)

The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek as- sumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw.

Holtek Semiconductor Inc. (Headquarters)

No.3, Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan Tel: 886-3-563-1999

Fax: 886-3-563-1189 http://www.holtek.com.tw

Holtek Semiconductor Inc. (Sales Office)

11F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan Tel: 886-2-2782-9635

Fax: 886-2-2782-9636

Fax: 886-2-2782-7128 (International sales hotline) Holtek Semiconductor (Shanghai) Inc.

7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China Tel: 021-6485-5560

Fax: 021-6485-0313 http://www.holtek.com.cn

Holtek Semiconductor (Hong Kong) Ltd.

RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288

Fax: 852-2-742-8657 Holmate Semiconductor, Inc.

48531 Warm Springs Boulevard, Suite 413, Fremont, CA 94539 Tel: 510-252-9880

Fax: 510-252-9885 http://www.holmate.com

SeriesofDecoders 12 HT12D/HT12F2

2 12 Series of Decoders

Selection Table

General Description

Features

Applications

Block Diagram

Pin Assignment

Pin Description

Absolute Maximum Ratings

Electrical Characteristics

Functional Description

Application Circuits

0 6  ,

0 6  .

Package Information

Product Tape and Reel Specifications

2 ¹² Series of Decoders

0 6 ,

0 6 .