PT2260 데이터 시트보기 (PDF) - Princeton Technology

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PT2260

Remote Control Encoder

Princeton Technology 

Tel: 886-2-66296288

Fax: 886-2-29174598

URL: http://www.princeton.com.tw

Remote Control Encoder

PT2260

SINGLE OSCILLATOR

The built-in oscillator circuitry of PT2260 allows a precision oscillator to be constructed by connecting

an external resistor between OSC and Vcc pins. For PT2270 (or PT2272) to decode correctly the

received waveform, the oscillator frequency of PT2270 (or PT2272) must be 1/16 ~ 4 (or 1/16 ~ 1/4)

times that of the transmitting PT2260. The typical oscillator frequency with various resistor values for

PT2260, PT2270, and PT2272 are shown below:

Encoder (PT2260) OSC Frequency

Decoder (PT2270) OSC Frequency

500

400

300

250

R=820 K

200

R=1 M

100

R=2 M

1 2 3 4 5 6 7 8 9 10 11

Vol ta ge (V )

Decoder (PT2272) OSC Frequency

1000

180

160

140

120

100

80

60

40

20

0

0

OSC Resistor = 510 K

Ohms

OSC Resistor = 1.0 M

Ohms

OSC Resistor = 1.2 M

Ohms

OSC Resistor = 2.2 M

Ohms

5

10

15

Voltage(Vcc)

(KHz) 100

10

R = 100 K

R = 240 K

R = 510 K

R=1M

R=2M

3

6

9

12

15

Voltage(V)

Suggested Oscillator resistor values are shown below.

PT2260

820KΩ

1MΩ

2MΩ

PT2272

510KΩ

620KΩ

1.2MΩ

PT2270

1MΩ

1.2MΩ

2.2MΩ

PT2260 V1.4

-7-

April, 2006

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