Semiconductor device

A semiconductor device comprising:

• a first lead for a first power supply;
• a second lead for a second power supply;
• a first circuit and a second circuit that are connected in series;
• a third lead for input;
• a first terminal that applies a first potential to a first power supply line of the first circuit, the first terminal being connected to the first lead via a first wiring;
• a second terminal that applies a second potential to a second power supply line of the second circuit, the second terminal being connected to the second lead via a second wiring;
• a third terminal that is connected to a signal transfer line of the first circuit, the third terminal being connected to the third lead via a third wiring;
• a fourth terminal;
• and
• a first protection circuit that is connected to the third terminal, and discharges a current from the third terminal to the fourth terminal when a potential of the third terminal becomes higher than a first threshold value,
• wherein the first power supply line and the second power supply line are separated, and the fourth terminal is not directly connected to the first power supply line and is electrically connected to the first lead via a fourth wiring;
• wherein a first shield wiring is located between the first wiring and the fourth wiring.