INTEGRATED CIRCUIT DEVICE HAVING I/O ELECTROSTATIC DISCHARGE PROTECTION CELL EQUIPPED WITH ELECTROSTATIC DISCHARGE PROTECTION DEVICE AND POWER CLAMP FOR SATISFYING ELECTROSTATIC DISCHARGE PROTECTION CHARACTERISTIC

摘要

PURPOSE: An integrated circuit device having an I/O electrostatic discharge protection cell equipped with an electrostatic discharge protection device and a power clamp is provided to obtain stably an electrostatic discharge protection characteristic regardless of reduction of an area of the I/O electrostatic discharge protection cell. CONSTITUTION: A VDD electrostatic discharge protection device(32) is connected between an I/O pad(90) and a VDD line(60). A VSS electrostatic discharge protection device(34) is connected between the I/O pad and a VSS line(70). A power clamp device is connected between the VDD line and the VSS line. An I/O electrostatic discharge protection cell(30) is formed with the VDD electrostatic discharge protection device, the VSS electrostatic discharge protection device, and the power clamp device.