Socionext Inc.

Fujitsu Semiconductor Limited

Yuichi Itonaga

Osamu Uno

Masahiro Iwamoto

Hajime Ohmi

A semiconductor apparatus includes an internal circuit connected to a first power line to which a first power voltage is applied; a transistor including a first terminal, which is connected to a node to which an input voltage is applied, a second terminal connected to the internal circuit, and a control terminal to which a control voltage is applied; and a voltage control circuit, which is connected to the node, generating the control voltage. Further, the voltage control circuit includes a step-down circuit generating an internal voltage by lowering the input voltage applied to the node, and a switching circuit, which is connected to the first power line, generating the control voltage based on the first power voltage and the internal voltage.

Semiconductor apparatus

An output circuit includes: a first PMOS transistor and a second PMOS transistor connected in series between a high potential side power source and an output node; a first NMOS transistor and a second NMOS transistor connected in series between a low potential side power source and the output node; a first capacitive coupling part connected between a gate of the first PMOS transistor and gates of the second PMOS transistor and the second NMOS transistor; and a second capacitive coupling part connected between a gate of the first NMOS transistor and gates of the second NMOS transistor and the second PMOS transistor, a first bias voltage is applied to the gate terminal of the second PMOS transistor, and a second bias voltage is applied to the gate terminal of the second NMOS transistor.

Output circuit

An output circuit includes: a first PMOS transistor and a second PMOS transistor connected in series between a high potential side power supply and an output node;

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Obu, Japan

Yuichi Itonaga