Compact electronic device for protecting from electrostatic discharge

A device for protecting a set of N nodes from electrostatic discharge, comprising:

• a set of N units respectively possessing N first terminals respectively connected to the N nodes and N second terminals connected together to form a common terminal,
• wherein each unit comprises a MOS transistor having a first electrode coupled to the first terminal, a second electrode coupled to said common terminal, a gate coupled to a substrate of the MOS transistor without being directly coupled to the first terminal, and a resistive element coupled between the substrate of the MOS transistor and the first terminal.

An ESD circuit, comprising:

• a first MOS transistor coupled between a first supply node and a common node, the first MOS transistor having a gate terminal connected to a bulk of the first MOS transistor without a direct connection to said first supply node;
• and
• a second MOS transistor coupled between a second supply node and the common node, the second MOS transistor having a gate terminal connected to a bulk of the second MOS transistor without a direct connection to said second supply node.