SEMICONDUCTOR DEVICE INCLUDING ELECTROSTATIC PROTECTION CIRCUIT AND OPERATION METHOD THEREOF

PROBLEM TO BE SOLVED: To provide an electrostatic protection circuit capable of providing a high capability of protecting a circuit and satisfying a timing requirement, and a semiconductor device including the circuit.SOLUTION: A semiconductor device includes a first driver configured to pull up a p...

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Hauptverfasser: KO JAE-HYOK, KIM HAN GU, KO MINANG
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide an electrostatic protection circuit capable of providing a high capability of protecting a circuit and satisfying a timing requirement, and a semiconductor device including the circuit.SOLUTION: A semiconductor device includes a first driver configured to pull up a pad to a first power supply voltage according to a driving signal, a second driver configured to pull down the pad to a second power supply voltage according to the driving signal, a switch protection resistor configured to change a resistance between the pad and the second driver according to a switch control signal, and an ESD detector configured to detect a level of the first or second power supply voltage and generate the switch control signal. 【課題】回路に対する高い保護機能を提供しながら、タイミング条件を満足させることができる静電保護回路及びそれを含む半導体装置を提供する。【解決手段】本発明による半導体装置は、駆動信号にしたがってパッド(Pad)を第1電源電圧にプルアップする第1ドライバ、駆動信号にしたがってパッド(Pad)を第2電源電圧にプルダウンする第2ドライバ、スイッチ制御信号にしたがってパッド(Pad)と第2ドライバとの間の抵抗値を可変するスイッチ保護抵抗、及び第1電源電圧又は第2電源電圧のレベルを検出してスイッチ制御信号を生成するESD検出器を含む。【選択図】 図1