Datasheet HT6P20, HT6P20A, HT6P20B, HT6P20D Datasheet (Holtek Semiconductor Inc)

Features

Operating voltage: 2V~12V

·

Low power consumption

·

Built-in oscillator needs only 5% resistor

·

0/2/4/8 data selectable

·

224maximum address and data codes

·

Easy interface with an RF or IR medium

·

Applications

Burglar alarm system

·

Smoke and fire alarm system

·

Garage door controllers

·

Car door controllers

·

General Description

The HT6P20 is a CMOS LSI encoder designed
for remote control system applications. It en
codes 24 bits of information and then serially
transmits it via the DOUT pin upon receipt of
transmission enable (DATA pins: D0~D7) sig­nals. The combination of address and data bits
of the HT6P20 is designed using one time pro-

HT6P20

24

2

One time programmable process

·

Data active: D0~D7

·

Minimal external components

·

HT6P20/A/B: 8-pin DIP/NSOP package

·

HT6P20/D: 16-pin DIP/NSOP package

Security system

·

Cordless telephones

·

Other remote control systems

·

grammable process. In addition, the chip offers
various packaging for flexible combination of

­programmable address/data so as to meet vari
ous applications. Its programmable ad
dress/data is transmitted together with the
anti-code bits via RF or infrared transmission
medium upon receipt of a trigger signal.

OTP Encoder

-

-

Block Diagram

OSC1

OSC2

VPP

SIO

Note: Address/Data numbers are available in various combinations, refer to the functional descrip

tion.

Oscillator

Program m ing

Circuit

C ontrol U nit

PGM

Address
C ounter

Mixer &

Driver

D a ta L a tc h

D0 D7

1 May 2, 2000

DOUT

Pin Assignment

HT6P20

24-A ddress
0 -D a ta

PGM

1

VSS

2

OSC2

3

OSC1

4

H T6P 20A

8 D IP /N S O P

SIO

8

VPP

7

VDD

6

DOUT

5

22-A ddress
2 -D a ta

D0

1

D1

2

VSS

3

OSC2

4

HT6P20B

8 D IP /N S O P

B lank device B lank device

D1

1

PGM

VSS

OSC2

OSC1

1

2

3

4

8

7

6

5

HT6P20

8 D IP /N S O P

SIO

VPP

VDD

DOUT

D2/NC

D3/NC

D4/NC

D5/NC

D6/NC

D7/NC

2

3

VSS

4

5

6

7

8

HT6P20

1 6 D IP /N S O P

20-A ddress
4 -D a ta

D1

D2

D3

VSS

NC

8

VDD

7

DOUT

6

OSC1

5

NC

NC

NC

NC

16

1

2

3

4

5

6

7

8

D0

15

PGM

14

SIO

13

VPP

12

VDD

11

DOUT

10

OSC1

9

OSC2

HT6P20D

1 6 D IP /N S O P

D0

16

PGM

15

SIO

14

VPP

13

VDD

12

DOUT

11

OSC1

10

OSC2

9

Note:

The customer code and control code have been programmed into HT6P20A/B/D by Holtek¢s
factory process.

The blank device HT6P20 is not programmed, it can be programmed by Holtek¢s programming
kit.

Warning: The 8-pin blank device only allows programming as HT6P20A type.

The 16-pin blank device allows programming as one of HT6P20/D type. After program
ming the HT6P20 pin name are the same as one of HT6P20D, which is determined by the
kit programming procedure.

Pin name ²NC² stands for no connection (floating).

2 May 2, 2000

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HT6P20

Pad Assignment Pad Coordinates

DOUT

NC

VDD

20

(0 ,0 )

12 13

D4

D5

19

14 15

D6

NC

18

17

16

OSC1

OSC2

D7

Pad No. X Y

1
2
3
4
5
6
7

-1123.00

-1123.00

-1123.00 -86.25

-1123.00 -261.25

-1123.00 -583.75

-1027.50 -776.75

8

9
10
11
12 142.50

SIO

PGM

D0

NC

D1

2

3

4

5

6

VPP

1

7 8

D2

D3

9 10 11

VSS

NC

13 317.50
14 640.00

Chip size: 2590 ´ 2010 (mm)

2

* The IC substrate should be connected to VSS in

the PCB layout artwork.

15 815.00
16 1137.50
17 1118.00
18 1118.00
19 489.00 772.05
20 223.50 789.75

Pin Description

HT6P20D

Pin No. Pin Name I/O

16
1~3

4 VSS

5~8 NC

D0~D3 I

¾¾

¾¾

9 OSC2 O OSCILLATOR Oscillator output pin

10 OSC1 I OSCILLATOR Oscillator input pin

11 DOUT O CMOS OUT Data serial transmission output

12 VDD

¾¾

13 VPP I

14 SIO I/O

15 PGM

Connection

I

Internal

CMOS IN

Pull-high

¾

CMOS

IN/OUT

CMOS IN

Pull-high

Description

Data input and transmission enable (active low)
They can be externally set to VSS or left open.

Negative power supply, ground

No connection

Positive power supply

Programming power supply, V
tion

Programming address/control code input and mode
code output for mode verification

Program mode control pin, active low

Unit: mm

-956.50

762.75

498.75

236.25

-852.50 -776.75

-530.00 -776.75

-355.00 -776.75

-180.00 -776.75

-776.75

-776.75

-776.75

-776.75

-776.75

-466.75

-205.75

for normal opera

DD

-

3 May 2, 2000

Approximate internal connection circuits

HT6P20

CMOS IN/O UT

CMOS OUT

CMOS IN

Pull-high

V

DD

OSC1

OSCILLATOR

OSC2

Absolute Maximum Ratings

Supply Voltage ..............................-0.3V to 12V

Input Voltage .................V

-0.3V to VDD+0.3V

SS

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi

mum Ratings² may cause substantial damage to the device. Functional operation of this de
vice at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.

Electrical Characteristics

Symbol Parameter

V

DD

I

STB

I

DD

V

IH

V

IL

R

PH

I

DOUT

f

OSC

Operating Voltage

Standby Current 12V Oscillator stops

Operating Current 12V

²H² Input Voltage ¾¾

²L² Input Voltage ¾¾

D0~D7 Pull-high Resistance 12V

Output Current

Oscillator Frequency 12V

Source

Sink

V

DD

¾¾

5V

12V

5V

12V

Storage Temperature.................-50°Cto125°C

Operating Temperature ..............-20°Cto75°C

Test Conditions

Min. Typ. Max. Unit

Conditions

No load
f

=3kHz

OSC

0.8V

¾¾

0.9V

DD

0.9V

DD

0.1V

DD

0.1V

DD

=1.4MW¾

R

OSC

2

¾

¾

0

-2 -5 ¾

-6.5 -15 ¾

25

615

¾

12

200 400

¾

DD

¾

150 300

3

12 V

V

DD

0.2V

DD

¾

¾

¾

Ta=25°C

mA

mA

V

V

kW

mA

mA

mA

mA

kHz

-

-

4 May 2, 2000

Functional Description

HT6P20

Programming

The HT6P20 is a one time programmable encod
ing integrated circuit. The programmable codes
consist of 4-bit control codes and 24-bit address
codes. Before using the device, first program the
internal 4 control bits and 24 address bits. Then,
to program the address and control codes, con
nect the PGM

pin to VSS, allowing the SIO pin to
receive control and address codes from the con
tinuously transmitting programming kit. The
control codes (B0~B3) and address timing are re
spectively shown on the Table and the Figure for
Programming Timing. In the programming pro
cess, the mode bit (B0) has to be programmed
first. The 0/2/4/8 data number is selected by the
address along with the data format bits (B1,B2).
The HT6P20, in addition, provides a polarity bit
(B3) to select the polarity of the output data.

Various packages of the HT6P20 offer program
mable combinations of address/data to meet
various application needs.

B1 B2 B3

B0

P o la rity c o n tro l
Address and data form at
M ode control

Table 1: Control code

-

·

Mode control (B0)

B0 Function

0 Not programmed

-

-

-

1 Programmed

·

Address and data format (B1,B2)

B2 B1 Code Format

0 0 A0~A23

­0 1 A0~A21 + D1~D0

1 0 A0~A19 + D3~D0

1 1 A0~A15 + D7~D0

·

-

Polarity control (B3)

B3 Data Output Polarity

0 Negative polarity

1 Positive polarity

The HT6P20A/D can be programmed by the
SIO pins. The HT6P20B, on the other hand, is
programmed for 2-data and positive polarity
application.

Programming timing of the HT6P20D (B0~B3=1010)

OSC2

(3kH z)

PGM

SIO

0

1

1

0

0

100 10

(2 ) A 0 ~ A 2 3 a re a d d r e s s c o d e s
(3) A20 ~ A 23 stands for don't care for the H T6P 20D
(4) SIO m ust be set to "H igh" during C and B 0 periods
(5 ) 0 : " L o w "; 1 : "H ig h " ; X : D o n 't c a re

Program m ing

bit

1

B0 B1 B2 B3 A0 A1 A2 A3 A18 A19A20 A21A22 A23

C

Program m ing

N o te : (1 ) B 0 ~ B 3 a re c o n tr o l c o d e s

Programming timing for the HT6P20D

5 May 2, 2000

X

X

X

X

HT6P20

Normal operation

The HT6P20 encodes and transmits address/data to a decoder upon receipt of a trigger signal. The
address codes of the HT6P20A are always transmitted as long as power (VDD) is supplied. The trans
mission function of the HT6P20B/D is enabled by the D0~D7 pins (active low). The following is the
transmission timing of the HT6P20:

D 0 ~ D 7

Encoder

DOUT

< 1 w ord

Transmission timing

A complete code word of the HT6P20D consists of 3 periods as shown below.

fo s c

DOUT

1 c lo c k

p ilo t p e r io d
(23 clocks)

1 /3 b it

(A 0~ A 1 9, 60 clocks)
address code period

A complete code word for the HT6P20D

The HT6P20A/B/D detects the logic state of the internal programmed address and the external data
pins, and then transmits the detected information during the code period. Each address/data bit can be
set to one of the following two logic states:

> 1 w ord

(D 3 ~D 0 , 12 clo cks)

data code period

0011

anti-code period

(4 b its )

-

fo sc

" O ne"

"Z ero"

Address/

Data bit

6 May 2, 2000

Flowchart

HT6P20

Power on

Standby m ode

No

No

Application Circuits

Transm itter C ircuit

1

PGM

2

Rosc

3

4

VSS

OSC2

OSC1

VPP

VDD

DOUT

Transm ission

enabled ?

Address/data w ords

transm itted

Transm ission

still enabled

Address/data w ords

transm itted

continuously

8

SIO

7

6

TE

5

Yes

Yes

LED

+12V

No

No

N ote: O ne tim e program m able

PGM =0 ?

Yes

Program m ing

m ode

Program m ing

com pleted ?

Yes

Transm itter C ircuit

1

2

3

4

5

6

7

8

D2

D3

VSS

NC

NC

NC

NC

D0D1

PGM

SIO

VPP

VDD

DOUT

OSC1

OSC2

16

15

14

13

12

11

10

9

+12V

LED

Rosc

HT6P20A

Rosc@1 .4 M

HT6P20D

W

Rosc@1 .4 M

7 May 2, 2000

W

Transm itter C ircuit

HT6P20

1

2

D2

3

D3

4

VSS

5

NC

6

NC

7

NC

8

NC

HT6P20D

Rosc@1 .4 M

16

D0D1

15

PGM

14

SIO

13

VPP

12

VDD

11

DOUT

10

OSC1

9

OSC2

W

Transm itter Circuit

1

2

D2

D3

VSS

NC

NC

NC

NC

HT6P20D

Rosc@1 .4 M

PGM

VPP

VDD

DOUT

OSC1

OSC2

3

4

5

6

7

8

Rosc

D0D1

SIO

+12V

100

W

0.1mF

+12V

100k

W

4.7k

W

16

15

14

13

12

11

10

Rosc

9

100

0.1mF

+12V

W

LED

Transm itter Circuit

1

2

D2

D3

VSS

NC

NC

NC

NC

PGM

VPP

VDD

DOUT

OSC1

OSC2

3

4

5

6

7

8

SIO

16

D0D1

15

14

13

100

Rosc

0.1mF

W

LED

12

11

10

9

HT6P20D

W

Rosc@1 .4 M

W

Note:

In order to prevent the IC from getting damaged due to the latch up, the 100W resistor or the
LED which can also be a transmission indicator is indispensible when V

=9V~12V.

DD

8 May 2, 2000

HT6P20

Holtek Semiconductor Inc. (Headquarters)

No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]

Holtek Semiconductor Inc. (Taipei Office)

5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]
Fax: [phone] (International sales hotline)

Holtek Semiconductor (Hong Kong) Ltd.

RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong
Tel: [phone]
Fax: [phone]

Copyright Ó 2000 by HOLTEK SEMICONDUCTOR INC.

The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek
assumes no responsibility arising from the use of the specifications described. The applicationsmentioned 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 pres
ent 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.

9 May 2, 2000

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