Datasheet SC5262D-IR, SC5262D-RF, SC5262S-IR, SC5262S-RF Datasheet (SILAN)

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REMOTE CONTROL ENCODER

DESCRIPTION

The SC5262 is a remote control encoder paired with SC5272
utilizing CMOS technology. It encodes data and address pins into a
serial coded waveform suitable for RF or IR modulation. SC5262
has a maximum of 12-bits of tri-state address pins providing up to
531,441(or 3
code collision and unauthorized code scanning possibilities.

FEATURES

* Low power consumption and very high noise immunity
* Up to 12 tri-state code address pins or 6 data pins
* Wide operating voltage range(Vcc=3V ~ 15V)
* Single resistor oscillator
* Latch or Momentary output type

12

) address codes; thereby, drastically reducing any

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SC5262

DIP-18

SOP-20

APPLICATION

* Home/automation security system
* Remote control toys or for industrial use
* Remote control fan
* Garage door controller

ORDERING INFORMATION

SC5262X-XX

PIN CONFIGURATION

20 Pin

Package

RF: RF Applicatant, normally omitted
IR: IR Applicatant

S: SOP-20 Package
D: DIP-20 Package
Omitted: DIP-18Package

A0

1

A1
A2
A3

18 Pin

A4

Package

A5
A6/D5
A7/D4

Vss
NC

SC5262

Vcc
Dout
OSC1

OSC2

TE
A11/D0
A10/D1
A9/D2
A8/D3

NC

DIP-20

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BLOCK DIAGRAM

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SC5262

TE

DoutOSC1OSC2

17141615

Vcc

18

OSC

Vss

System

Timing

Control

Logic

Code

Generation

9

Address

87654321 11 12 13

10

A0 A1 A2 A3 A4 A5

The block diagram is for DIP-18(hereinafter is the same)

A6/D5A7/D4A8/D3A9/D2A10/D1A11/

D0

ABSOLUTE MAXIMUM RATINGS

Characteristic Symbol Value Unit

Supply Voltage Vcc -0.3 ~ 16.0 V
Input Voltage Vi -0.3 ~ Vcc+0.3 V
Output Voltage Vo -0.3 ~ Vcc+0.3 V
Maximum Power Dissipation(Vcc=12V) Pa 300 mW
Operating Temperature Topr -20 ~ +70
Storage Temperature Tstg -40 ~ +125

(Ta=25°C)

°C
°C

ELECTRICAL CHARACTERISTICS

(Ta=25°C,Vcc=12V,unless otherwise specified)

Characteristic Symbol Test Condition Min Typ. Max Unit

Supply Voltage Vcc 3 15 V
Supply Current

Dout Output driving Current I

Dout Output sinking Current I

Vcc=12V,OSC stops

Icc

A0~ A11 Open
Vcc=5V,VOH=3V -3 mA
Vcc=8V,VOH=4V -6 mA

OH

Vcc=12V,VOH=6V -10 mA
Vcc=5V,VOL=3V 2 mA
Vcc=8V,VOL=4V 5 mA

OL

Vcc=12V,VOL=6V 9 mA

0.02 0.3

µA

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PIN DESCRIPTION

Pin No.

18 PIN 20 PIN

1~6 1~6 A0~A5 I

7~8

10~13

14 16

15 17 OSC1 O Oscillator Pin No.1
16 18 OSC2 I Oscillator Pin No.2

17 19 DOUT O

18 20 Vcc -- Positive Power Supply

9 9 Vss -- Negative Power Supply

-- 10~11 NC -- Not Connected

7~8

12~15

Pin Name I/O Description

Code Address pins No. 0~5. These six tri-state pins are
detected by SC5262 to determine the encoded waveform
bit 0 ~bit 5. Each pin can be set to “0”,”1”,”f”(floating).
Code Address pinsNo.6~11/data pins No.5~0. These six

A6/D5~A11/D0 I

TE

tri-state pins are detected by SC5262 to determine the
encoded waveform bit 6 ~bit 11.When these pins are used
as address pins, they can be set to “0”,”1”,”f”.When they
are used as data pins ,they can be set only to “0”,”1”.
Transmission Enable. Active Low Signal.SC5262 outputs

I

the encoded waveform to DOUT whenthis pins is pulled to
LOW.

A resistor connected between
these two pins determine the

fundamental frequency of SC5262.
Data Output Pin. The encoded waveform is serially
outputted to this pin. When SC5262 is not transmitting,
DOUT outputs low(Vss) voltage.

FUNCTIONAL DESCRIPTION

The SC5262 encodes the code address and data set at A0~ A5 and A6/D5 ~ A11/D0 into a special waveform

and outputs it to the Dout when
the IR transmitter for transmission. The Transmitted radio frequency or infrared ray is received by the RF
demodulator or IR receiver and reshaped to the special waveform. SC5272 is then used to decode the waveform
and set the corresponding output pins. Thus completing a remote control encoding and decoding function.

TE

is pulled to “0” (Low state). This waveform is fed to either the RF modulator or

SC5262

1. RF OPERATION

Code Bits

A code bit is the basic component of the encoded waveform, and can be classified as either an AD(Address/Data)

Bit or a SYNC(Synchronous) Bit.

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 two pulse cycles. Each pulse cycle has 16 oscillating time periods. For further details, please
refer to the diagram below:

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

1/8 bit width=4a

4 bit width=128a

Note: 1bit =32a

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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~A5 and A6/D5 ~ A11/D0 pins at the time of
transmission. When Data Type of SC5262 is used , the address bits will decrease accordingly. For example, in the
3 Data Type where the address has 9 bits, the transmitting format is:

9 address bits 3 Data bits Sync. Bit

SC5262/SC5272 has a maximum of 12 Address Bits including the 6 Address/Data bits. The following diagram
shows the code bits with their corresponding pins.

SC5262

A0 A1 A2 A3 A4 A5

0DataA0A1A2A3A4A5A6A7A8A9A10A11Sync
1DataA0A1A2A3A4A5A6A7A8A9A10D0Sync
2DataA0A1A2A3A4A5A6A7A8A9D1D0Sync
3DataA0A1A2A3A4A5A6A7A8D2D1D0Sync
4DataA0A1A2A3A4A5A6A7D3D2D1D0Sync
5DataA0A1A2A3A4A5A6D4D3D2D1D0Sync
6DataA0A1A2A3A4A5D5D4D3D2D1D0Sync

The Code Bits A0~A5 and A6/D5 ~ A11/D0 are determined by the states of A0 ~ A5 and A6/D5 ~A11/D0 pins.
For example, whenthe A0(pin 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.

Code Frame

A Code Frame consists of 4 continuous code Words. When SC5262 detects “0” on theTE(meaning , the
is active “low”), it outputs a Code frame at Dout. IfTEis still active at the time the Code Frame transmission ends.

SC5262 outputs another Code Frame. It should be noted that the Code Frame is synthesized at the time of
transmission.

A6

/D5A7/D4A8/D3A9/D2

A10

/D1

A11

/D0

TE

TE

1 frame(=4 word)

Dout

Single Resistor Oscillator

The Build-in oscillator circuitry of SC5262 allows a precision oscillator to be constructed by connecting an
external resistor between OSC1 and OSC2 pins. For SC5272 to decode correctly the received waveform, the
oscillator frequency of SC5272 must be 2.5 ~8 times that of transmitting SC5262. The typical oscillator frequency
with various resistor values for both SC5262 and SC5272 are shown below:

1frame 1frame

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Encoder OSC Frequency

100

10

Frequency (kHz)

R=510kΩ

R=1MΩ
R=2MΩ

R=3.3MΩ

R=4.7MΩ

Decoder OSC Frequency

1000

100

10

Frequency (kHz)

R=100kΩ
R=240kΩ

R=510kΩ

R=1MΩ

R=2MΩ

SC5262

1

0 3 6 9 12 15

Supply Voltage (V)

1

0 3 6 9 12 15

Supply Voltage (V)

Suggested Oscillator resistor values are shown below:

SC5262 SC5272

4.7MΩ 820kΩ

3.3MΩ

1.2MΩ

680kΩ
200kΩ

2. IR OPERATION

In the IR Type of operation, the functions are similar to the above descriptions except for the output waveform

that has a carrier frequency of 38kHz. Details are as follow.

Code Bits

The Code Bits are further modulated with a 38kHz carrier frequency and can be”0”,”1” or “ f ” bit. Their waveform

are shown below:

OSC

"0"
"1"

"f"

Sync

20λ

60λ

Note:λ=2 clock lengths

160λ

620λ

Code Word

A Code Word is made up of code bits and the format is the same as that of the RF Code Word.

Code Frame

Likewise, a Code Frame is made up of Code Words and the format is the same as that of RF type of operation.

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Oscillator

The oscillator frequency for the IR type of operation is twice the carrier frequency. Thus, the oscillator frequency
should be kept at 76kHz. A 430k~470kΩ oscillator resistor between OSC1 and OSC2 pins is recommended. It
should be noted that the carrier is a 50% duty cycle frequency.

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OPERATION FLOW CHART

Power ON

Stand-by

Mode

No

TE Enable?

Yes

4 Words of

Address/Data

transmitted

No

TE Enable?

Yes

SC5262

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TYPICAL APPLICATION CIRCUIT

10µH

25pF

MPSH10

UHF Band 4 Data Transmitter Circuit is recommended.

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LED

5pF

4.7kΩ

18 17 16 15 14 13 12 11 10

1 2 3 4 5 6 7 8 9

1N4148×4

4.7MΩ

SC5262

SC5262

SW0
SW1
SW2
SW3

2.7kΩ×4

10kΩ×4

+12V

LED

10µH

25pF

MPSH10

5pF

4.7MΩ
SW

4.7kΩ

+12V

18 17 16 15 14 13 12 11 10

SC5262

1 2 3 4 5 6 7 8 9

UHF Band Address-only(o data) Transmitter Circuit is recommended.

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SC5262

10µH

25pF

MPSH10

LED

5pF

4.7kΩ

4.7MΩ

18 17 16 15 14 13 12 11 10

SW

SC5262

1 2 3 4 5 6 7 8 9

UHF Band Address-only(o data) Zero-stand-by Transmitter Circuit is recommended.

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SW0
SW1
SW2
SW3

4.7Ω

IR

47µF

2SC1815×2

1N4148×4

Rosc

430kΩ ~470kΩ

+4.5V

+12V

18 17 16 15 14 13 12 11

2.7kΩ×4

SC5262-IR

1 2 3 4 5 6 7 8109

1N4148

1N4148

SW4 SW5

2.7kΩ

2.7kΩ

Infrared Ray 6-data circuit. Adjust Rosc to get 38kHz carrier pulse at Dout pin is recommended.

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PACKAGE OUTLINE

DIP-18-300-2.54 UNIT: mm

2.54

SC5262

0.25

6.40

22.95

3.51

0.46

1.50

7.62

15 degree

5.083.30

DIP-20-300-2.54 UNIT: mm

2.54

0.25

6.40

1.50

22.95

3.51

7.62

15 degree

5.083.30

0.46

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SOP-20-225-1.27 UNIT:mm

7.70

10.45

SC5262

9.53

1.27

18.02

17.62

0.41

1.95

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