Patent ID: RE44368

Claim:
A temperature-compensated crystal oscillator comprising: a crystal oscillator element; an IC element having a plurality of connection pads on a main surface thereof, for controlling an oscillation output on the basis of temperature compensation data for compensating for a temperature characteristic of the crystal oscillator element; a mounting base having an IC element mounting area on which the IC element is mounted; and a plurality of electrode pads arranged in a matrix configuration of m rows × n columns(wherein m and n are natural numbers not smaller than 3) in the IC element mounting area of the mounting base, including an oscillation output electrode pad, a ground electrode pad, a power source voltage electrode pad, a writing electrode pad for writing the temperature compensation data, and plural crystal electrode pads connected to the crystal oscillator element, wherein the IC element mounting area has an edge portion and an interior portion, and wherein the electrode pads are electrically connected to the connection pads of the IC element, and at least one of the electrode pads is disposed in the interior portion of the IC element mounting area.