ESD PROTECTION CIRCUIT AND SEMICONDUCTOR DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an ESD protection circuit appropriately operating to a chip terminal in which a signal voltage exceeds a power supply voltage in both positive and negative directions.SOLUTION: An ESD protection circuit includes: a PNPN junction in which a P-side of one end is connected to a terminal and an N-side of another end is connected to ground; and a PMOS transistor in which a source and a gate are connected to an N-side of a PN junction having a P-side connected to ground and a drain is connected to the terminal.