PT2262-IR is specially designed for infrared remote control applications and its output waveform carries 38KHz frequency. To get the 38KHz carrier frequency at the data output, the oscillator frequency must be 76KHz. A 440KΩ resistor connected between OSC1 and OSC2 pins of PT2262-IR is recommended. Moreover, for a matching decoder frequency, 1MΩ resistor connected between the OSC1 and OSC2 pins of PT2272 is also recommended 我用470和1M影响大不大？
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