Electrostatic discharge protection circuit and integrated circuit

Abstract

The invention relates to an electrostatic discharge protection circuit and an integrated circuit. The electrostatic discharge circuit comprises an electrostatic discharge detection unit, an electrostatic discharge unit and a switching unit. The electrostatic discharge unit conducts electrostatic current between a first conductive end and a second conductive end. The electrostatic discharge detection unit is coupled with the first conductive end and used for detecting the electrostatic discharge phenomenon of the first conductive end so as to output a detection signal. The electrostatic discharge unit is used for releasing electrostatic current of the first conductive end. The switching unit is coupled between the first conductive end and a core work circuit and controls electrical conduction or disconnection of the first conductive end and the core work circuit according to the detection signal.

Description

technical field [0001] The invention relates to an electrostatic discharge protection circuit, and in particular to an electrostatic discharge protection circuit for preventing electrostatic discharge current from passing into a core working circuit in an integrated circuit when electrostatic discharge occurs. Background technique [0002] An integrated circuit (Integrated Circuit, IC) or some electronic components may be damaged by electrostatic discharge (electrostatic discharge, ESD) in an actual environment. For example, during the transportation or assembly of an integrated circuit, when an external object with electrostatic charge, such as a human body, touches the input / output terminal (I / O port) of the integrated circuit, the electrostatic charge is quickly transferred from the external object to the input / output terminal , resulting in the phenomenon of electrostatic discharge. When electrostatic discharge occurs, a large electrostatic voltage and electrostatic curr...

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Problems solved by technology

[0003] However, when the electrostatic current is large and the low-resistance bypass cannot discharge the electrostatic circuit in time, part of the electrostatic current will still enter the core working circuit from the input / output end. Therefore, it is necessary to prevent the electrostatic current while venting the electrostatic current Access to the core working circuit has become an urgent problem to be solved

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