Semiconductor device

Abstract

A semiconductor device includes a power supply line supplied with a power supply voltage; a power supply node connected with the power supply line; a ground line; a ground pad connected with the ground line; a signal input pad; a main protection circuit section configured to discharge an ESD surge applied to a first pad as one of the power supply node, the signal input pad and the ground pad to a second pad as another thereof; a protection object circuit; a connection node connected with the protection object circuit; a first resistance element connected between the signal input pad and the connection node; and a sub protection circuit section. The sub protection circuit section includes a least one of a first PMOS transistor having a source connected with the connection node, a drain connected with the ground line and a gate and a back gate connected with the power supply line, and a first NMOS transistor having a source connected with the connection node, a drain connected with the power supply line and a gate and a back gate connected with the ground line.

Dependencies are inferred from the claim text.