BI-DIRECTIONAL ESD PROTECTION CIRCUIT

摘要

An electrostatic discharge (ESD) device (10) for protecting an input/output terminal of a circuit has a first transistor (Ml) with an integrated silicon-controlled rectifier (SCR) coupled between the input/output (I/O) terminal (14) of the circuit and a node (12) and a second transistor (M2) with an integrated silicon-controlled rectifier coupled between the node (12) and a negative terminal of a supply voltage, wherein the silicon-controlled rectifier of the first transistor triggers in response to a negative ESD voltage and the silicon-controlled rectifier of the second transistor triggers in response to a positive ESD voltage.