SC5272S-M2 データシートの表示（PDF） - Silan Microelectronics

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SC5272S-M2

REMOTE CONTROL DECODER

Silan Microelectronics 

Silan

Semiconductors

SC5272

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

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 interpreted as either address or data bits depending on the SC5272 version used. Please refer to

the diagram below:

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

Single Resistor Oscillator

The Build-in oscillator circuitry of SC5272 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. It is a good practice to center the

SC5272 oscillator frequency in the window to gain best window margin at both sides. The typical oscillator

frequency with various resistor values for both SC5262 and SC5272 are shown below:

Encoder OSC Frequency

100

R=510kΩ

R=1MΩ

R=2MΩ

R=3.3MΩ

10

R=4.7MΩ

Decoder OSC Frequency

1000

R=100kΩ

R=240kΩ

100

R=510kΩ

R=1MΩ

10

R=2MΩ

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

4.7MΩ

3.3MΩ

1.2MΩ

SC5272

820kΩ

680kΩ

200kΩ

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0 2000.12.31

5

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