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Pin voltage of oscillator broken: Will it reach input value?

Latest Updated:04/01/2008

Question:

Even when a resonator is connected, the pin voltage of the clock oscillator fails to reach the rated input voltage value and remains an extremely weak voltage. Does this mean the part is broken?

Answer:

No. In the case of the clock oscillator pin, the input voltage rating is applied to the voltage level for the clock signal input, which differs from the case of resonator connection. When a probe of a measuring device such as an oscilloscope is applied to this pin during voltage or waveform observation, this affects the oscillation owing to the capacitance, etc., of the probe.
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