| 摘要 |
PURPOSE:To form the titled device in a small mounting area without requiring the external attaching of a resistor isolating a circuit input section or output section for a semiconductor chip, in which a predetermined circuit is integrated, and an external terminal in a high-frequency manner by connecting the resistor in series between both the circuit input section or output section and the external terminal. CONSTITUTION:One parts of a lead frame 11 for an input (output) section required are cut, and resistors R are inserted to the cut sections. Consequently, suitability to an electromagnetic environment can be improved on the IC side, thus increasing the degree of freedom in the design, then eliminating the need for a countermeasure to the electromagnetic environment in a system into which an IC is incorporated. A mounting area is not made wider than the countermeasure of improvement by external attaching parts, high-density mounting is enabled, and these effects are effective for not only the case when an analog IC malfunctions by an electromagnetic field from the outside but also the case when an IC into which a clock source is incorporated leaks out a clock component to the outside as seen in a microprocessor, a successive comparison A/D converter, etc. and other apparatus are malfunctioned. |
