Silan
Semiconductors

SC50560

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.3

2002-03-21

INFRARED REMOTE CONTROL
TRANSMITTER

DESCRIPTION

The

SC50560 is a remote control transmitter utilizing CMOS

technology housed in a 20-pin DIP or SO package. A 4x8 key matrix

and extension bit inputs allow the transmission of up to 256

instructions. The transmission code consists of 16 bits code (8 bits

custom code and 8 bits data code) and a leader code.

Pin assignments and application circuit of SC50560 are optimized

for easy PCB layout and cost saving advantage for remote control

applications.

FEATURES

* CMOS technology

* Low power consumption

* Least external components

* LED power dissipation is less during the transmission of

instructions

DIP-20

SOP-20

ORDERING INFORMATION

SC50560
SC50560S

DIP-20 Package
SOP-20 Package

APPLICATIONS

PIN CONFIGURATION

* Audio Equipment

* Television

* Video Cassette Recorder

* Air Condition

Vss

TEST

SEL

OSCI

OSCO

KIO0

KO7

KO6

KO5

KO4

KO3

KO2

KO1

KO0

OUT

KIO1

KIO2

KIO3

SC50560

Silan
Semiconductors

SC50560

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.3

2002-03-21

BLOCK

DIAGRAM

Scan

Key

Input

Scan Signal Generating Circuit

Output

Controller

Timing

Generator

Oscillation

Circuit

KIO0

KIO1

KIO2

KIO3

S1 S2 S3 S4 S5 S6 S7 S8

VSS

VDD

Code

Transfer

Data Encoder

Test Circuit

OSCO

OSCI

TEST

DOUT

SEL

ABSOLUTE MAXIMUM RATINGS

(Tamb=25

�

Characteristic Symbol Value

Unit

Supply Voltage

-0.3 ~ 5.5

Input Voltage

Vss-0.3V ~ V

+0.3V

Output Voltage

OUT

Vss

Operating Temperature

Topr

-20 ~ 70

�

Storage Temperature

Tstg

-40 ~ +125

�

ELECTRICAL CHARACTERISTICS

(Tamb=25

�

C, V

=3.0V,Vss=0,Unless otherwise specified)

Parameter Symbol

Test

Conditions

Min

Typ

Max

Unit

Supply Voltage

Fosc =455KHz

2.0

3.0

4.0

Operating Current

Fosc =455KHz

0.12

0.3

Stand-by Current

OSCO =V

KIO0~KIO3= V

TEST = Vss SEL = Vss

0.1

�

High level Output Current (Dout)

=2V

-1.0

-13

0.5

1.2

Low Level Output Current

(Dout, KO0~KO7)

KO0~KO7

=0.9V

4.5

5.3

High Level Input Voltage (CS)

(KIO0~KIO3)

=3.0V

0.7 V

Low Level Input Voltage (CS)

(KIO0~KIO3)

=3.0V

0.3V

Input Pull-High Resistance

(KIO0~KIO3)

=3.0V

Silan
Semiconductors

SC50560

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.3

2002-03-21

PIN DESCRIPTION

Pin No.

Pin Name

Input/output

Description

Negative Power Supply

TEST

Test Pin. This pin is normally connected to VSS.

SEL

Select Pin for SC50560-001/003.

OSCI

Oscillation Input Pin

OSCO

Oscillation Output Pin

Code Select Pin

7~10

KIO0~KIO3

I/O

Input/Output Pins

18~11

KO0~KO7

Scan Output Pins

Dout

Output Pin

Positive Power Supply

FUNCTIONAL DESCRIPTION

SC50560 is capable of transmitting up to 256 different instructions and 8 bits custom codes using a 16-bit PCM

Code with a leader code. Furthermore, oscillation is normally stopped when there is no operating, thereby, lower

power dissipation.

1. TRANSMISSION CODE

SC50560 transmission code consists of a leader code, 8 bits custom code (C0 to C7) followed by a sync. bit

and 8 bits data code (D0 to D7) followed another sync. bit. The custom and the data codes are separated by a

separator. Please refer to the diagram below:

C1 C2 C3

Leader Pulse

8 Bits Custom Code

SYNC

D0 D1 D2 D3 D4 D5 D6 D7

SYNC

Sync. Bit

8 Bits Data Code

Sync. Bit

Seperator

Figure 1. SC50560 Transmission Code Format

One transmission Code Word consists of a 19-bit pulse (that is the leader pulse plus the 16 bits code) and the

separator. It is transferred in a 63.4ms for as long as the key is depressed. Please refer to the diagram below:

SEPARATOR

8.4ms

4.2ms

ONE CODE WORD

63.4ms

4.2ms

8BITS CUSTOM CODE

LEADER CODE

8BITS DATA CODE

C1 C2

C3 C4 C5 C6 C7

SYNC

D0 D1

D2 D3 D4 D5 D6 D7

SYNC

Figure 2. SC50560 Detailed Code Word Format

Silan
Semiconductors

SC50560

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.3

2002-03-21

LEADER CODE

The leader code is located at the beginning of the transmission code and is made up of 8.4ms HIGH & 4.2ms

LOW pulse and is modulated in 38KHz providing easy identification of the reception code head bit at the receiver.

CUSTOM CODE

Custom Code may be selected by connection CS Input with Scan Output (KO0 to KO4). An example of a

custom code selection is shown in the diagram below.

KO0

KO1

KO2

KO4

KO3

Custom Code

Figure 3. custom Code Selection Example

DATA CODE

D0 to D7 of the transmission code are the data code bits. When CS Input and the Scan Output (KO5 to

KO7) are connected, data bits--D5 to D7 becomes the system extended code bits. An example of the

Extended code Bits Selection is given in the diagram below:

Data Code

SW = OFF

SW = ON

KO5

KO6

KO7

Figure 4. Extended Code Selection

2. SEPARATOR

The separator demarcates the custom code and the data code. It consists of a 4.2ms LOW pulse interval and

can be determined at the receiver so theat any interference with other remote control system may be avoided.

Please refer to Figure 2.

Silan
Semiconductors

SC50560

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.3

2002-03-21

3. CARRIER

The carrier of the transmission signal is 38KHz and one pulse width is 0.52ms. Therefor, with the exception of

the leader code, there are twenty 38KHz clock in one pulse width. Please refer to the diagram below.

0.52ms

8.7

�s

26.3

�s

Figure 5. Transmission Signal Carrier Diagram

4. KEY INPUT

By connecting the input pins � KI0 to KI3 and scan output pins �KO0 to KO7 (also known as the Standard Keys),

a 4x8 key matrix may be formed. Likewise, a maximum of 256 instructions may be provided by connecting the input

CS with the scan output �KO0 to KO7 (also known as the Extended Keys). When two or more standard keys are

pressed, the transmission output Dout is kept at LOW and no transmission code is outputted. Please refer to the

tables below.

Data

Key Input

D0 D1

KI0

KI1

KI2

KI3

Data Data

Scan Output

D2 D3 D4

CS Input

D5 D6 D7

KO0

KO5

KO1

KO6

KO2

KO7

KO3

KO4

KO5

KO6

KO7

Электронный компонент: SC50560S