SC5260 데이터 시트보기 (PDF) - Silan Microelectronics
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SC5260 Datasheet PDF : 8 Pages
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Silan
Semiconductors
SC5260
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
500
400
300
250
200
100
R=820K
R=1M
R=2M
1 2 3 4 5 6 7 8 9 10
Voltage (Volts)
Decoder (SC5272) OSC Frequency
1000
Decoder (SC5270) OSC Frequency
180
160
140
120
100
80
60
40
20
0
0
OSC Resistor = 510K Ohms
OSC Resistor = 1.0M Ohms
OSC Resistor = 1.2M Ohms
OSC Resistor = 2.2M Ohms
2
4
6
8
Voltage (Vcc)
10
12
R=100K
R=240K
100
R=510K
R=1M
10
R=2M
3
6
9
12
15
Voltage
Suggested oscillator resistor values are shown below.
SC5260 SC5270 SC5272
820kâ 510kâ 1Mâ
1Mâ 620kâ 1.2Mâ
2Mâ 1.2Mâ 2.2Mâ
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
6
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