Datasheet SC5260-R2, SC5260-R4 Datasheet (SILAN)

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REMOTE CONTROL ENCODER

DESCRIPTION

The SC5260 is a remote control encoder paired with either
SC5260 or SC5272 utilizing COMS Technology. It encodes data and
address pins into a serial coded waveform suitable for RF
modulation. SC5260 has a maximum of 10 bits tri-state address
pins providing up to 59,049 (or 310) address codes; thereby,
drastically reducing any code collision and unauthorized code
scanning possibilities.

SC5260 is one of the first generation of Encoder/
Decoder ICs. When paired with SC5270, this encoder/decoder
(SC5260/SC5270) pair can operate at very wide temperature range
(see Features). Thus, this very important feature enables your
Encoder/Decoder to operate under the worst environmental
condition.

FEATURES

* High Performance Technology
* Low Power Consumption
* Very High Noise Immunity
* Wide Operating Temperature Range: -30°C~70°C
* 8 or 10 Tri-State Code Address Pins
* Single Resistor Oscillator
* Least External Components

ODERING INFORMATION

SC5260-R4 (S) 16 Pins, DIP (SO)
SC5260-R2 (S) 16 Pins, DIP (SO)

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APPLICATIONS

* Home/Car Security System
* Garage Door Controller
* Remote Fan Controller
* Remote Control Toys

SC5260

SOP-16

DIP-16

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Rev: 1.0 2000.12.31

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BLOCK DIAGRAM

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SC5260

A0
A1
A2
A3
A4
A5
A6

A7
A8/D3
A9/D2

D1

D0

PIN CONFIGURATION

1

A0

2

A1

3

A2

4

A3

5

A4

ADDRESS

/DATA

SC5260-R4

SYSTEM

TIMING

CONTROL

LOGIC

CODE

GENERATION

OSC OSC

DOUT

16

CC

V

15

DOUT

OSC

14

D0

13

D1

12

A0

A1

A2

A3

A4

1

2

3

4

5

SC5260-R2

16

CC

V

15

DOUT

OSC

14

D0

13

D1

12

A5

A6

A7

6

7

8

D2

11

D3

10

V

9

SS

A5

A6

A7

6

7

8

11

10

9

ABSOLUTE MAXIMUM RATINGS

Characteristic Symbol Value Unit

Supply Voltage V
Input/Output Voltage VIN,V
Maximum Power Dissipation P

CC

OUT

a

-0.3 ~ +6.0 V

-0.3V ~ VCC+0.3V V
500 mW

Operating Temperature Topr -30 ~ +70
Storage Temperature Tstg -40 ~+125

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

2

A9

A8

V

SS

Rev: 1.0 2000.12.31

°C
°C

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ELECTRICAL CHARACTERISTICS

Parameter Symbol Test conditions Min Typ Max Unit

Supply Voltage V

Stand-by Current I

DOUT Output Driving Current I

DOUT Output Sinking Current I

Operation Current Iop

OH

OL

CC

VCC=3V OSC stops

sb

All input pins open
VCC=3V, VOH=1.5V
V

CC

VCC=3V, VOH=1.5V
V

CC

V

CC

V

CC

=6.0V, VOH=3.0V

=6.0V, VOH=3.0V
=1.8V
=6.0V

1.8 6.0 V

0.2 0.5 0.8

2.5

4.6

0.01

0.50

PIN DESCRIPTION

Pin No. Symbol I/O Description

1~8 A0~A7 I Code Address Pin Nos.0~7

These eight tri-state pins ate detected by SC5260 to determine the
encoded waveform bit0~bit7. Each bit can be set to “0”, “1”, or
“f”(floating).

10~11 A8/D3~A9/D2 I/PL* Code Address pin Nos.8~9/Data Pin Nos.3~2.

These two tri-state pins are detected by SC5260 to determine the
encoded waveform bit8~bit9. When these pins ate used as address
pins (as in SC5260-R2), they can be set to “0”, “1”, or “f” (floating).
When these pins are used as data pins (as in SC5260-R4), they can

only be set to “0” or “1”.
12~13 D1, D0 I/PL Data Pin Nos. 1~0. These pins can only be set to “0” or “1”.
14 OSC I Oscillator Pin A resistor connected between the OSC Pin and the VCC

determines the fundamental frequency of the SC5260.
15 DOUT O Data Output Pin. The encoded waveform is serially outputted to this

pin. When SC5260 is not transmitting, DOUT outputs low (VSS)

voltage.
16 VCC Positive Power Supply
9 VSS Negative Power Supply

Note: PL -- Pull-low Resistor is connected internally

PL* -- If those two pins are used as Data Pins (SC5260-R2), pull-low resistor is connected internally;

otherwise, no pull-low resistor is connected.

SC5260

10

12

µA

mA

mA

mA

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FUNCTIONAL DESCRIPTION

SC5260 encodes the code address and data set at A0~A7, A8/D3, A9/D2, D1 and D0 into a special waveform
and outputs it to the DOUT when any of the data pins is tied to high. This waveform is fed to the RF Modulator for
transmission. The transmitted radio frequency is received by the RF demodulator and reshaped into the special
waveform. SC5270 (or SC5272) is then used to decode the waveform and set the corresponding output pin(s).
Thus completing a remote control encoding and decoding function.

1. RF Operation

1) Code Bits

A Code Bits is the basic component of the encoded waveform, and can be classified as either an

(Address/Data) Bit or a SYNC (Synchronous) Bit.

•

Address/Data (AD) Bit Waveform

An AD Bit can be designated as Bit “0”, “1”, or “f” if it is in low, high or floating state respectively. One bit
waveform consists of 2 pulse cycles. Each pulse cycle has 512 oscillating clock periods. For further details, please
refer to the diagram below:

¢

Osc

Bit "0"

128

¢

Bit "1"

384

Bit "f"

Floating

Where: α = Oscillating Clock Period

1 bit = 1024

¢

128

¢

¢

SC5260

AD

•

Synchronous (SYNC.) Bit Waveform

The Synchronous Bit Waveform is 4 bits long with 1/8 bit width pulse. Please refer to the diagram below:

1/8bitwidth=128

4 bit width = 4096

Note: 1 bit = 1024

¢

¢

¢

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2) Code Word

A group of Code Bits is called a Code Word. A Code Word consists of 12 AD bits followed by one Sync Bit. The
12 AD bits are determined by the corresponding states of A0~A7, A8/D3, A9/D2, D1 and D0 pins at the time of
transmission. When the Data Type of SC5260 is used, the address bits will decrease accordingly.

For example: In the 4-Data Type where the address has eight (8) bits, the transmitting format is:

8 Address Bits 4DataBits Sync. Bit

SC5260 has a maximum of ten (10) Address Bits. The following diagram shows the code bits with their
corresponding pins.

First Bit Transmitted

SC5260

A0 A1 A2 A3 A4 A5 A6 A7

One Complete Code Word

A8/D3A9/

D2

D1 D0 SYNC BIT

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2 Data: A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 D1 D0 Sync Bit
4 Data: A0 A1 A2 A3 A4 A5 A6 A7 D3 D2 D1 D0 Sync Bit

The Code Bits A0~A7, A8/D3, A9/D2, D1 and D0 are determined by the states set at these pins. For example,
when the A0 (Pin No.1) is set to “1” (VCC), the Code Bit A0 is synthesized as “1” bit. In the same manner, when it
(A0 Pin) is set to “0” (VSS) or left floating, the Code Bit A0 is synthesized as a “0” or “f” bit respectively.

When SC5260 detects “1” on any of the Data Pins, it outputs a Code Word at DOUT. If the Data Pin is still in
high state (“1”) the time the Code Word transmission ends, SC5260 outputs the same Code Word. Please refer
to the diagram below:

DATA PIN

DOUT

1 CodeWord 1 Code Word 1 Code Word 1 Code Word

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3) Single Resistor Oscillator

The built-in oscillator circuitry of SC5260 allows a precision oscillator to be constructed by connecting an external
resistor between OSC and VCC pins. For SC5270 (or SC5272) to decode correctly the received waveform, the
oscillator frequency of SC5270 (or SC5272) must be 1/16~4 (or 1/16~1/4) times that of the transmitting SC5260.
The typical oscillator frequency of SC5270, and SC5272 are shown below:

Encoder (SC5260) OSC Frequency Decoder (SC5270) OSC Frequency

500

180

400

300
250
200

Frequency (KHz)

100

12345678910

Voltage (Volts)

Decoder (SC5272) OSC Frequency

1000

R=820K
R=1M

R=2M

R=100K

160
140
120
100

80

Frequency (KHz)

60
40
20

0

2 4 6 8 10 12

0

Voltage (Vcc)

SC5260

OSC Resistor = 510K Ohms
OSC Resistor = 1.0M Ohms
OSC Resistor = 1.2M Ohms
OSC Resistor = 2.2M Ohms

100

Frequency (KHz)

10

369

Voltage

12 15

R=240K
R=510K

R=1M

R=2M

Suggested oscillator resistor values are shown below.

SC5260 SC5270 SC5272

820k

â

510k

â

1M

â

1M

â

620k

â

1.2M

â

2M

â

1.2M

â

2.2M

â

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0 2000.12.31

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OPERATION FLOWCHART

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Power ON

Stand-byMode

SC5260

APPLICATION CIRCUIT

Vcc

16 15 14 13 12 11 10 9

820K

NO

1WordofAddress

/Data Transmitted

NO

SC5260-R4

Data Pin(s) still

Data Pin(s)

in HIGH State

YES

in HIGH State

YES

10

47K

87654321

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H

5p 5p

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PACKAGE OUTLINE

DIP-16-300-2.54 UNIT: mm

2.54

SC5260

0.25

6.40

3.51

19.4

1.50

0.46

7.62

15 degree

5.083.30

SOP-16-225-1.27 UNIT: mm

0.41

3.95

6.00

5.72

1.27

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

10.20

9.80

1.95

Rev: 1.0 2000.12.31

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