| 摘要 |
An inventive temperature-compensated crystal oscillator has a construction such that a crystal oscillator element ( 5 ) is accommodated in a container ( 1 ) and an IC element ( 7 ) for controlling an oscillation output on the basis of the oscillation of the crystal oscillator element ( 5 ) is mounted on a lower surface of the container ( 1 ). A plurality of electrode pads ( 10 ) at least including plural crystal electrode pads connected to the crystal oscillator element ( 5 ), plural writing control electrode pads, and an oscillation output electrode pad, a ground electrode pad, a power source voltage electrode pad and an oscillation control electrode pad connected to surface mounting external terminals are arranged in a matrix configuration of m rowsxn columns (wherein m and n are natural numbers not smaller than 2) in an IC element mounting area. The IC element ( 7 ) is electrically connected to the electrode pads ( 10 ). The temperature-compensated crystal oscillator is excellent in IC element bonding reliability, and meets the need for the size reduction of the entire structure.
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