| 摘要 |
A semiconductor device includes a signal input pad, a protection object circuit, a first connection node connected with the protection object circuit, a first resistance element connected between the signal input pad and the first connection node, a first protection circuit section arranged between a power supply line or a ground line and a second connection node between the signal input pad and the first resistance element, and a second protection circuit section. The second protection circuit section includes at least one of a first PMOS transistor having a source connected with the first 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 said first connection node, a drain connected with the power supply line and a gate and a back gate connected with the ground line.
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